Compositions and methods comprising combinations of TSLP and ox40l antibodies

Abstract

Described herein are antibodies, or antigen binding fragments thereof, that bind thymic stromal lymphopoietin (TSLP) and OX40L in combination and methods of use thereof. In certain aspects, described herein are methods of inhibiting OX40L and TSLP biological activity. In certain aspects, described herein are pharmaceutical compositions comprising the anti-TSLP and anti-OX40L antibodies, or antigen binding fragments thereof. In certain aspects, the antibodies and methods described herein are used for treatment of an inflammatory disease or disorder associated with elevated levels of TSLP and / or OX40L.

Description

Goodwin Ref: PRG-062WOCOMPOSITIONS AND METHODS COMPRISING COMBINATIONS OF TSLP AND OX40L ANTIBODIESCROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to and benefit of U.S. Provisional Application Numbers 63 / 681,642 filed August 9, 2024 and 63 / 827,583 filed on June 20, 2025, the contents of each of which are incorporated by reference herein in their entirety.SEQUENCE LISTING

[0002] This application contains a Sequence Listing XML, which has been submitted electronically and is hereby incorporated by reference in its entirety. The XML copy of the Sequence Listing, created on July 24, 2025, is named PRG-062WO_SL.xml and is 560,234 bytes in size.BACKGROUND

[0003] Thymic stromal lymphopoietin (TSLP) is an epithelial cell-derived cytokine produced in response to pro-inflammatory stimuli. TSLP has been discovered to promote allergic inflammatory responses primarily through its activity on dendritic and mast cells. Human TSLP expression has been reported to be increased in asthmatic airways correlating to disease severity. In addition, TSLP protein levels are detectable in the concentrated bronchoalveolar lavage (BAL) fluid of asthma patients and other patients suffering from allergic disorders. In addition, TSLP has also been found to promote fibrosis.

[0004] TSLP binds to a heterodimeric receptor consisting of the TSLP receptor (TSLPR) and an IL-7 receptor a chain (IL-7Ra) in dendritic cells, thereby activating the dendritic cells. Upon activation, the dendritic cells express inflammatory chemokines such as thymus- and activation-regulated chemokine (TARC (CCL17)), macrophage-derived chemokine (MDC (CCL22)), and the like.

[0005] Activation of dendritic cells by TSLP through the TSLPR is associated with disease pathology, including allergic inflammatory diseases, such as asthma, and autoimmune disease, such as systemic sclerosis.

[0006] An emerging mechanism in treatments for atopic dermatitis (AD) is targeting 0X40 or OX40L. OX40L is the ligand for 0X40. OX40L is expressed on antigen presenting cells and its interaction with 0X40 causes the accumulation of T cells by providing a survival signal. T cells are important types of white blood cells of the immune system that play a central role in the immune response. OX40L, by playing a role in activating T cells and reprogramming them into inflammatory subsets, contributes to immune overactivation in AD and other inflammatory1IPTS / 200090251.1Goodwin Ref: PRG-062WO conditions, such as Systemic Lupus Erythematosus. Additionally, OX40L activation of 0X40 inhibits the expression of FOXP3 and the inhibitory function of regulatory T (Treg) cells. Treg cells can suppress the immune response that leads to worsening symptoms in inflammatory conditions. Therefore, OX40L blockade may lead to clinical benefit in AD and other inflammatory conditions by first suppressing inflammatory T cell activation, and next by increasing the proliferation of Treg cells, which can serve to further reduce inflammatory cells. Amlitelimab, which targets OX40L, and rocatinlimab, which targets 0X40, have both demonstrated promising Phase 2 data in AD.

[0007] Accordingly, there is a need in the art for antagonists to TSLP and OX40L for preventing and treating diseases in which TSLP and OX40L are involved in the disease pathology, such as inflammatory and fibrotic disorders.

[0008] In addition, because targeting each of OX40L and TSLP may lead to various clinical benefits in inflammatory conditions, there is a need in the art for improved therapeutics that target both TSLP and OX40L, such as a combination of antibodies wherein, for example, one or more of the antibodies remains active for a longer term (i.e., has a longer half-life) as compared to another anti-TSLP antibody (e.g., tezepelumab) or anti- OX40L antibody (e.g., amlitelimab or oxelumab) when administered to a subject.SUMMARY

[0009] The present disclosure provides antibodies to TSLP, or antigen binding fragments thereof, such as recombinant human antibodies, and antibodies that specifically bind human OX40L, or antigen binding fragments thereof, and methods of treating diseases in which human TSLP and OX40L are involved in disease pathology. The antibodies of the disclosure can include Fc modifications and exhibit longer half-lives than an otherwise identical antibody that does not include the Fc modification, for example, certain anti-TSLP or anti-OX40L antibodies known in the art.

[0010] In one aspect, provided herein is an isolated antibody, or antigen binding fragment thereof, that binds TSLP, comprising: a) a variable heavy (VH) chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a variable light (VL) chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3; wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising2IPTS / 200090251.1Goodwin Ref: PRG-062WO the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; or (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and an isolated antibody, or antigen binding fragment thereof, that binds OX40L.

[0011] In some embodiments, the isolated antibody, or antigen binding fragment thereof, that binds OX40L comprises a CDR-H1, CDR-H2, CDR-H3, CDR-L1, CDR-L2, and CDR-L3 of an antibody selected from amlitelimab and oxelumab.

[0012] In some embodiments, the isolated antibody, or antigen binding fragment thereof, that binds OX40L comprises: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a VL chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3, wherein the isolated antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in3IPTS / 200090251.1Goodwin Ref: PRG-062WO any one of SEQ ID NOs: 327 and 328; (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330; (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332; or (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

[0013] In another aspect, provided herein is an isolated antibody, or antigen binding fragment thereof, that binds TSLP; and an isolated antibody, or antigen binding fragment thereof, that binds OX40L, comprising: a) a variable heavy (VH) chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a variable light (VL) chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3; wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328; (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a4IPTS / 200090251.1Goodwin Ref: PRG-062WOCDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330; (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332; or (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

[0014] In some embodiments, the isolated antibody, or antigen binding fragment thereof, that binds TSLP comprises a CDR-H1, CDR-H2, CDR-H3, CDR-L1, CDR-L2, and CDR-L3 of an antibody selected from tezepelumab), hu23bl2, 43B1-H2L2, 43B1-H6L1, GR2002 (described in U.S. Patent Application Publication No. US 2024 / 0132581, which is incorporated herein by reference), TQC2731 (also known as BSI-045B and bosakitug, described in U.S. Patent Application Publication No. US 2022 / 0289833, which is incorporated herein by reference), and solrikitug.

[0015] In some embodiments, the isolated antibody, or antigen binding fragment thereof, that binds TSLP comprises: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a VL chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3, wherein the isolated antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; (ii) a CDR- H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H25IPTS / 200090251.1Goodwin Ref: PRG-062WO comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; or (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396.

[0016] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

[0017] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16;6IPTS / 200090251.1Goodwin Ref: PRG-062WO a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any of SEQ ID NOs: 329 and 330.

[0018] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

[0019] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set7IPTS / 200090251.1Goodwin Ref: PRG-062WO forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

[0020] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

[0021] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any of SEQ ID NOs: 329 and 330.

[0022] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID8IPTS / 200090251.1Goodwin Ref: PRG-062WONOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

[0023] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

[0024] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a CDR-H1 comprising the sequence9IPTS / 200090251.1Goodwin Ref: PRG-062WO set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

[0025] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330.

[0026] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.10IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0027] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

[0028] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

[0029] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a11IPTS / 200090251.1Goodwin Ref: PRG-062WOCDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330.

[0030] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

[0031] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR- L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set12IPTS / 200090251.1Goodwin Ref: PRG-062WO forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

[0032] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a heavy chain variable domain (VH) sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 32-36. In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34.

[0033] In some embodiments, the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 335-338.

[0034] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a light chain variable domain (VL) sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 37-45 and 402-438. In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VL sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 41, 43, 415, and 421.

[0035] In some embodiments, the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VL sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 339-342.

[0036] In some embodiments, (a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 32; (ii) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 33; or (iii) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and / or (iv) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; (v) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; (vi) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; or (vii) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and / or (b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; (ii) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; (iii) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; or (iv) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and / or (v) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339; (vi) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 400; (vii) a VL sequence comprising the amino acid sequence set forth13IPTS / 200090251.1Goodwin Ref: PRG-062WO in SEQ ID NO: 401; or (viii) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 402.

[0037] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41.

[0038] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43.

[0039] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415.

[0040] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421.

[0041] In some embodiments, the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

[0042] In some embodiments, the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

[0043] In some embodiments, the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.

[0044] In some embodiments, the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

[0045] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

[0046] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO:14IPTS / 200090251.1Goodwin Ref: PRG-062WO34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

[0047] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.

[0048] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

[0049] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

[0050] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

[0051] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.15IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0052] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

[0053] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

[0054] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

[0055] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.

[0056] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

[0057] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH16IPTS / 200090251.1Goodwin Ref: PRG-062WO sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

[0058] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

[0059] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.

[0060] In some embodiments, antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

[0061] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L is a humanized, human, or chimeric antibody. In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L is a humanized antibody.

[0062] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a heavy chain human constant region of a class selected from IgG, IgA, IgD, IgE, and IgM.

[0063] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human Fc region, and wherein the human Fc region comprises a human heavy chain constant region of the class IgG and a subclass selected from IgGl, IgG2, IgG3, and IgG4.17IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0064] In some embodiments, the human Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the human Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human IgGl Fc region.

[0065] In some embodiments, the human Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the human Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human IgG4 Fc region.

[0066] In some embodiments, the human Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the human Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human IgG2 Fc region.

[0067] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a heavy chain comprising a constant heavy chain sequence selected from an amino acid sequence set forth in any one of SEQ ID NOs: 47-270. In some embodiments, the heavy chain of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the heavy chain of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a constant heavy chain sequence selected from an amino acid sequence set forth in any one of SEQ ID NOs: 61 and 173.

[0068] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a constant light chain sequence set forth in SEQ ID NO: 46 or SEQ ID NO: 453.

[0069] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human lambda light chain constant region. In some embodiments, the human lambda light chain constant region comprises a sequence set forth in any one of SEQ ID NOs: 453-456. In some embodiments, the human lambda light chain constant region comprises a sequence set forth in SEQ ID NO: 453.

[0070] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a light chain comprising a human lambda light chain constant region and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a light chain comprising a human kappa light chain constant region.

[0071] In some embodiments, the light chain of the antibody, or antigen binding fragment thereof, that binds TSLP comprises a constant light chain sequence set forth in SEQ ID NO: 453.18IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0072] In some embodiments, the light chain of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a constant light chain sequence set forth in SEQ ID NO: 46.

[0073] In some embodiments, the antibody that binds OX40L comprises a heavy chain sequence set forth in SEQ ID NO: 478 or 479 and a light chain sequence set forth in SEQ ID NO: 480. In some embodiments, the antibody that binds OX40L comprises a heavy chain sequence set forth in SEQ ID NO: 478 and a light chain sequence set forth in SEQ ID NO: 480. The heavy chain sequence of SEQ ID NO: 478 contains a C-terminal lysine, which may be cleaved off during manufacture or after administration, resulting in the heavy chain sequence of SEQ ID NO: 479.

[0074] In some embodiments, the antibody that binds TSLP comprises a heavy chain sequence set forth in SEQ ID NO: 457 or 459 and a light chain sequence set forth in SEQ ID NO: 458. In some embodiments, the antibody that binds TSLP comprises a heavy chain sequence set forth in SEQ ID NO: 457 and a light chain sequence set forth in SEQ ID NO: 458. The heavy chain sequence of SEQ ID NO: 457 contains a C-terminal lysine, which may be cleaved off during manufacture or after administration, resulting in the heavy chain sequence of SEQ ID NO: 459.

[0075] In some embodiments, the antibody that binds TSLP is Antibody 5 and the antibody that binds OX40L is Construct 114.

[0076] In some embodiments, the antibody that binds TSLP is an antibody having a VH sequence and a VL sequence from the same row of TABLE 4 (i.e., a VH sequence and VL sequence from a single antibody in TABLE 4) and the antibody that binds OX40L is Construct 114.

[0077] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP is an antibody having a VH sequence and a VL sequence from the same row of TABLE 13 (i.e., a VH sequence and VL sequence from a single antibody in TABLE 13) and the antibody that binds OX40L is Construct 114.

[0078] In some embodiments, the antibody that binds TSLP is an antibody having a CDR- Hl, a CDR-H2, a CDR-H3, a CDR-L1, a CDR-L2, and a CDR-L3 from the same row of TABLE 3 (i.e., having six CDRs from a single antibody in TABLE 3) and the antibody that binds OX40L is Construct 114.

[0079] In some embodiments, the antibody that binds TSLP is an antibody having a CDR- Hl, a CDR-H2, a CDR-H3, a CDR-L1, a CDR-L2, and a CDR-L3 from the same row of19IPTS / 200090251.1Goodwin Ref: PRG-062WOTABLE 12 (i.e., having six CDRs from a single antibody in TABLE 12) and the antibody that binds OX40L is Construct 114.

[0080] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a heavy chain constant domain having a means for increasing the half-life of the antibody.

[0081] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises an Fc region comprising one or more amino acid substitutions, wherein the one or more amino acid substitutions result in an increase in one or more of antibody half-life, ADCC activity, ADCP activity, or CDC activity compared with the Fc without the one or more substitutions.

[0082] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises an Fc region comprising one or more amino acid substitutions, wherein the one or more amino acid substitutions result in a decrease in one or more of, ADCC activity, ADCP activity or CDC activity compared to an antibody comprising a wild-type Fc region.

[0083] In some embodiments, the one or more amino acid substitutions is selected from the group consisting of S228P, M252Y, S254T, T256E, T256D, T250Q, H285D, T307A, T307Q, T307R, T307W, L309D, Q411H, Q311V, A378V, E380A, M428L, N434A, N434S, N297A, D265A, L234A, L235A, and N434W (or, e.g., L235A, L236A, L239A, L240A, M253Y, S255T, T257E, M257Y, S259T, or T261E using direct numbering); optionally, wherein the one or more amino acid substitutions comprises a plurality of amino acid substitutions selected from the group consisting of M428L / N434S (LS), M252Y / S254T / T256E (YTE) using EU numbering or M257Y / S259T / T261E (YTE) using direct numbering or M253Y / S255T / T257E (YTE) using direct numbering, T250Q / M428L, T307A / E380A / N434A, T256D / T307Q (DQ), T256D / T307W (DW), M252Y / T256D (YD), T307Q / Q311V / A378V (QVV), T256D / H285D / T307R / Q311V / A378V (DDRVV), L309D / Q311H / N434S (DHS), S228P / L235E (SPLE), L234A / L235A (LALA) using EU numbering or L239A / L240A (LALA) using direct numbering or L235A / L236A (LALA) using direct numbering, M428L / N434A (LA), L235A / G237A (LAGA), L234A / L235A / G237A (LALAGA), L234A / L235A / P329G (LALAPG), D265A / YTE, LALA / YTE, LAGA / YTE, LALAGA / YTE, LALAPG / YTE, N297A / LS, D265A / LS, LALA / LS, LALAGA / LS, LALAPG / LS, N297A / DHS, D265A / DHS, LALA / DHS, LAGA / DHS, LALAGA / DHS, LALAPG / DHS, SP / YTE, SPLE / YTE, SP / LS, SPLE / LS, SP / DHS, SPLE / DHS, N297A / LA, D265A / LA, LALA / LA, LAGA / LA, LALAGA / LA, LALAPG / LA, N297A / N434A, D265A / N434A, LALA / N434A, LAGA / N434A,20IPTS / 200090251.1Goodwin Ref: PRG-062WOLALAGA / N434A, LALAPG / N434A, N297A / N434W, D265A / N434W, LALA / N434W, LAGA / N434W, LALAGA / N434W, LALAPG / N434W, N297A / DQ, D265A / DQ, LALA / DQ, LAGA / DQ, LALAGA / DQ, LALAPG / DQ, N297A / DW, D265A / DW, LALA / DW, LAGA / DW, LALAGA / DW, LALAPG / DW, N297A / YD, D265A / YD, LALA / YD, LAGA / YD, LALAGA / YD, LALAPG / YD, T307Q / Q311V / A378V (QVV), N297A / QVV, D265A / QVV, LALA / QVV, LAGA / QVV, LALAGA / QVV, LALAPG / QVV, DDRVV, N297A / DDRVV, D265A / DDRVV, LALA / DDRVV, LAGA / DDRVV, LALAGA / DDRVV, and LALAPG / DDRVV. In some embodiments, the one or more amino acid substitutions is selected from the group consisting of LS, YTE, T250Q / M428L, T307A / E380A / N434A, DQ, DW, YD, QVV, DHS, LA, D265A / YTE, LALA / YTE, LAGA / YTE, LALAGA / YTE, LALAPG / YTE, N297A / LS, D265A / LS, LALA / LS, LALAGA / LS, LALAPG / LS, N297A / DHS, D265A / DHS, LALA / DHS, LAGA / DHS, LALAGA / DHS, LALAPG / DHS, SP / YTE, SPLE / YTE, SP / LS, SPLE / LS, SP / DHS, SPLE / DHS, N297A / LA, D265A / LA, LALA / LA, LAGA / LA, LALAGA / LA, LALAPG / LA, N297A / DQ, D265A / DQ, LALA / DQ, LAGA / DQ, LALAGA / DQ, LALAPG / DQ, N297A / DW, D265A / DW, LALA / DW, LAGA / DW, LALAGA / DW, LALAPG / DW, N297A / YD, D265A / YD, LALA / YD, LAGA / YD, LALAGA / YD, LALAPG / YD, N297A / QVV, D265A / QVV, LALA / QVV, LAGA / QVV, LALAGA / QVV, and LALAPG / QVV.

[0084] In some embodiments, the Fc region of the antibody that binds TSLP and / or the antibody that binds OX40L comprises LALA / YTE substitutions.

[0085] Although the EU numbering system is typically used to identify the positions of the various Fc mutations described herein, direct numbering can also be used. For example, in certain embodiments, an antibody described herein comprises an Fc region with YTE mutations at positions 253 / 255 / 257 or 257 / 259 / 261, respectively. In certain embodiments, an antibody described herein comprises an Fc region with LALA mutations at positions 235 / 236 or 239 / 240, respectively. In certain embodiments, an antibody described herein comprises an Fc region with YTE mutations at positions 253 / 255 / 257 and with LALA mutations at positions 235 / 236. In certain embodiments, an antibody described herein comprises an Fc region with YTE mutations at positions 257 / 259 / 261 and with LALA mutations at positions 239 / 240. In certain embodiments, the OX40L antibody described herein comprises an Fc region comprising YTE mutations at positions 253 / 255 / 257, respectively and LALA mutations at positions 235 / 236, respectively. In certain embodiments, the OX40L antibody described herein comprises the VH and VL of Construct 114 and an Fc region comprising YTE mutations at positions 253 / 255 / 257, respectively and with LALA mutations at positions 235 / 236, respectively. In certain embodiments, the TSLP antibody described herein comprises an Fc region comprising YTE21IPTS / 200090251.1Goodwin Ref: PRG-062WO mutations at positions 257 / 259 / 261, respectively and LALA mutations at positions 239 / 240, respectively. In certain embodiments, the TSLP antibody described herein comprises the VH and VL of Antibody 5 and an Fc region comprising YTE mutations at positions 257 / 259 / 261, respectively and with LALA mutations at positions 239 / 240, respectively.

[0086] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34, a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41, and a human IgGl Fc region comprising LALA and YTE mutations; and the antibody that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335, a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339, and a human IgGl Fc region comprising LALA and YTE mutations. In some embodiments, the antibody that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34, a constant heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 173 and / or a constant heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 61, a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41, and a constant light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 453; and the antibody that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335, a constant heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 173 and / or a constant heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 61, a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339, and a constant light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 46. In some embodiments, the antibody that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34, a constant heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 173, a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41, and a constant light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 453; and the antibody that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335, a constant heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 173, a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339, and a constant light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 46. A C-terminal lysine is present in SEQ ID NO: 173, which may be cleaved off during manufacture or after administration, resulting in the sequence of SEQ ID NO: 61. Accordingly, a composition comprising an antibody that binds TSLP and / or an antibody that binds OX40L comprising the22IPTS / 200090251.1Goodwin Ref: PRG-062WO constant heavy chain sequence of SEQ ID NO: 173 that is administered to a subject may comprise antibodies having the constant heavy chain sequence set forth in SEQ ID NO: 173 or SEQ ID NO: 61, or a mixture thereof (e.g., a mixture of antibodies containing either a constant heavy chain sequence of SEQ ID NO: 173 or a constant heavy chain sequence of SEQ ID NO: 61 and / or antibodies containing both constant heavy chain sequences (e.g., in an antibody containing two constant heavy chain sequences)).

[0087] In some embodiments, the antibody that binds TSLP comprises a heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 457 and / or 459 and a light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 458; and the antibody that binds OX40L comprises a heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 478 and / or 479 and a light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 480. In some embodiments, the antibody that binds TSLP comprises a heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 457 and a light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 458; and the antibody that binds OX40L comprises a heavy chain sequence comprising the amino acid sequence set forth SEQ ID NO: 478 and a light chain sequence comprising the amino acid sequence set forth in SEQ ID NO: 480. The C-terminal lysine in SEQ ID NO: 457 and / or SEQ ID NO: 478 may not be present if cleavage occurs during manufacture or after administration (which would result in the heavy chain sequence of SEQ ID NO: 459 and / or SEQ ID NO: 479, respectively).

[0088] In some embodiments, the antibody that binds TSLP is Antibody 5 and the antibody that binds OX40L is amlitelimab or oxelumab.

[0089] In some embodiments, the antibody that binds TSLP is tezepelumab, GR2002, TQC2731, solrikitug, hu23bl2, 43B1-H2L2, or 43B1-H6L1 and the antibody that binds OX40L is Construct 114.

[0090] In some embodiments, the Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L binds to Neonatal Fc receptor (FcRn).

[0091] In some embodiments, the Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L binds an FcRn with higher affinity at pH 6.0 compared to an antibody comprising a wild-type Fc region.23IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0092] In some embodiments, the Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L binds to FcRn with a KD of <1 x 10-7 M at pH 6.0.

[0093] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L is a monoclonal antibody.

[0094] In some embodiments, the antibody, or antigen binding fragment thereof, that binds TSLP binds a TSLP sequence set forth in the amino acid sequence of any of SEQ ID NOs: 271- 272.

[0095] In some embodiments, the antibody, or antigen binding fragment thereof, that binds OX40L binds an OX40L sequence set forth in the amino acid sequence of SEQ ID NO: 439.

[0096] In some embodiments, the isolated antibodies of any one disclosed here are for use in the treatment of an inflammatory disorder or disease.

[0097] In some embodiments, the isolated antibodies, or antigen binding fragments thereof, disclosed herein are for use in the treatment of atopic dermatitis (AD). In some embodiments, the treatment reduces disease severity in a patient and wherein disease severity is assessed by an atopic dermatitis disease severity outcome measure.

[0098] In some embodiments, the isolated antibodies, or antigen binding fragments thereof, disclosed herein are for use in the treatment of asthma, chronic sinusitis with nasal polyps; Chronic Rhinosinusitis without Nasal Polyps (CRSsNP); eosinophilic esophagitis (EoE); an Eosinophilic gastrointestinal disorder or disease (EGID), such as Eosinophilic Gastritis (EoG), Eosinophilic Enteritis (EoN), Eosinophilic Colitis (EoC), or Eosinophilic Gastroenteritis (EGE); Churg-Strauss syndrome / Eosinophilic granulomatosis with polyangiitis (EGPA); Prurigo Nodularis (PN); Chronic Spontaneous Urticaria (CSU); Chronic Pruritis of Unknown Origin (CPUO); Bullous Pemphigoid (BP); Cold Inducible Urticaria (ColdU); Allergic Fungal Rhinosinusitis (AFRS); Allergic Bronchopulmonary Aspergillosis (ABPA); Chronic Obstructive Pulmonary Disease (COPD); an inflammatory bowel disease, such as Crohn’s disease or ulcerative colitis; lupus; rheumatoid arthritis (RA); psoriasis; hidradenitis suppurativa; celiac disease; idiopathic pulmonary fibrosis; alopecia areata; systemic sclerosis; allergic rhinitis; eosinophilic fasciitis; scleromyxedema; scleredema; or nephrogenic systemic fibrosis.

[0099] In another aspect, provided herein is an isolated polynucleotide or set of polynucleotides encoding any one of the isolated antibodies disclosed herein, a VH thereof, a VL thereof, a light chain thereof, a heavy chain thereof, or an antigen-binding portion thereof, and optionally, wherein the polynucleotide or set of polynucleotides comprises cDNA.24IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0100] In another aspect, provided herein is a vector or set of vectors comprising the polynucleotide or set of polynucleotides disclosed herein.

[0101] In another aspect, provided herein is a host cell comprising the polynucleotide or set of polynucleotides disclosed herein or the vector or set of vectors disclosed herein.

[0102] In another aspect, provided herein is a method of producing one or more of the isolated antibodies, or antigen binding fragments thereof, disclosed herein, the method comprising expressing one or more of the antibodies within the host cell disclosed herein and isolating the one or more expressed antibodies.

[0103] In another aspect, provided herein is a pharmaceutical composition comprising any of the isolated antibodies, or antigen binding fragments thereof, disclosed herein and a pharmaceutically acceptable excipient (i.e., a pharmaceutical composition comprising an antibody, or antigen binding fragment thereof, that binds to TSLP and / or an antibody, or antigen binding fragment thereof, that binds to OX40L).

[0104] In another aspect, provided herein is a kit comprising any of the isolated antibodies, or antigen binding fragments thereof, disclosed herein (e.g., a kit comprising an antibody, or antigen binding fragment thereof, that binds to TSLP and an antibody, or antigen binding fragment thereof, that binds to OX40L) or the pharmaceutical composition disclosed herein and instructions for use.

[0105] In another aspect, provided herein is a method for treating an inflammatory disorder or disease in a mammalian subject in need thereof, the method comprising administering to the mammalian subject a therapeutically effective amount of any of the isolated antibodies, or antigen binding fragments thereof, disclosed herein; a therapeutically effective amount of a pharmaceutical composition disclosed herein; or a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds TSLP and a pharmaceutically acceptable excipient and a therapeutically effective amount of a pharmaceutical composition comprising an antibody, or antigen binding fragment thereof, that binds OX40L and a pharmaceutically acceptable excipient.

[0106] In some embodiments, the mammalian subject is a human.

[0107] In some embodiments, the inflammatory disorder or disease is atopic dermatitis.

[0108] In some embodiments, the inflammatory disorder or disease is asthma.

[0109] In some embodiments, the inflammatory disorder or disease is chronic sinusitis with nasal polyps; Chronic Rhinosinusitis without Nasal Polyps (CRSsNP); eosinophilic esophagitis (EoE); an Eosinophilic gastrointestinal disorder or disease (EGID), such as Eosinophilic Gastritis (EoG), Eosinophilic Enteritis (EoN), Eosinophilic Colitis (EoC), or Eosinophilic25IPTS / 200090251.1Goodwin Ref: PRG-062WOGastroenteritis (EGE); Churg-Strauss syndrome / Eosinophilic granulomatosis with polyangiitis (EGPA); Prurigo Nodularis (PN); Chronic Spontaneous Urticaria (CSU); Chronic Pruritis of Unknown Origin (CPUO); Bullous Pemphigoid (BP); Cold Inducible Urticaria (ColdU); Allergic Fungal Rhinosinusitis (AFRS); Allergic Bronchopulmonary Aspergillosis (ABPA); Chronic Obstructive Pulmonary Disease (COPD); an inflammatory bowel disease, such as Crohn’s disease or ulcerative colitis; lupus; rheumatoid arthritis (RA); psoriasis; hidradenitis suppurativa; systemic sclerosis; idiopathic pulmonary fibrosis; alopecia areata; celiac disease; allergic rhinitis; eosinophilic fasciitis; scleromyxedema; scleredema; or nephrogenic systemic fibrosis.

[0110] In another aspect, provided herein is a method for treating a pathology associated with elevated levels of TSLP and / or OX40L in a mammalian subject in need thereof, the method comprising administering to the mammalian subject a therapeutically effective amount of any of the isolated antibodies, or antigen binding fragments thereof, disclosed herein, a pharmaceutical composition disclosed herein, or a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds TSLP and a pharmaceutically acceptable excipient and a therapeutically effective amount of a pharmaceutical composition comprising an antibody, or antigen binding fragment thereof, that binds OX40L and a pharmaceutically acceptable excipient.

[0111] In another aspect, provided herein is a method of reducing biological activity of TSLP and / or OX40L in a mammalian subject in need thereof, the method comprising administering to the mammalian subject a therapeutically effective amount of any of the isolated antibodies, or antigen binding fragments thereof, disclosed herein, a pharmaceutical composition disclosed herein, or a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds TSLP and a pharmaceutically acceptable excipient and a therapeutically effective amount of a pharmaceutical composition comprising an antibody, or antigen binding fragment thereof, that binds OX40Land a pharmaceutically acceptable excipient.

[0112] In some embodiments, the mammalian subject is a human.

[0113] In another aspect, provided herein is an isolated antibody, or antigen binding fragment thereof, that binds TSLP, comprising: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a VL chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence26IPTS / 200090251.1Goodwin Ref: PRG-062WO set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and an isolated antibody, or antigen binding fragment thereof, that binds OX40L, comprising: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR- H2, and CDR-H3; and b) a VL chain sequence having three light chain CDR sequences, CDR- Ll, CDR-L2, and CDR-L3, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises: (i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328, wherein the isolated antibody, or antigen binding fragment thereof, that binds TSLP and / or the isolated antibody, or antigen binding fragment thereof, that binds OX40L comprises a heavy chain comprising a heavy chain constant region having a means for extending the half-life of the isolated antibody.BRIEF DESCRIPTION OF FIGURES

[0114] FIG. 1A - FIG. ID show the ability of exemplary anti-TSLP antibodies and a positive control antibody (antibody based on published sequences of tezepelumab) to inhibit TSLP binding. FIG. ID also includes an isotype control.

[0115] FIG. 2A - FIG. 2C show the ability of exemplary antibodies and a positive control antibody (antibody based on published sequences of tezepelumab) to inhibit the STAT5-induced expression of luciferase. FIG. 2C also includes an isotype control.

[0001] FIG. 3A - FIG. 3C show the ability of exemplary anti-TSLP antibodies and a positive control antibody (antibody based on published sequences of tezepelumab) to inhibit the proliferation of Baf3 cells. FIG. 3C also includes an isotype control.

[0116] FIG. 4A - FIG. 4D show the ability of exemplary anti-TSLP antibodies and a positive control antibody (antibody based on published sequences of tezepelumab) to inhibit TSLP-induced TARC secretion.27IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0117] FIG. 5 is a graph showing the serum concentration of Antibody 5 and a positive control antibody (antibody based on published sequences of tezepelumab) over time when injected intravenously (IV) or subcutaneously (SC) in vivo in non-human primates.

[0118] FIG. 6 is a schematic of TSLP with a positive control antibody (antibody based on published sequences of tezepelumab) and Antibody 5 epitope mapping regions shown in medium gray and black speckles, respectively, as measured by Hydrogen-Deuterium Exchange (HDX) mass spectrometry.

[0119] FIG. 7 is a schematic of TSLP with a positive control antibody (antibody based on published sequences of tezepelumab) and Antibody 5 epitope mapping regions shown in medium gray and black speckles, respectively, as measured by cross-linking mass spectrometry (XL-MS).

[0120] FIGURE 8 is a graph showing the ability of exemplary anti-hOX40L antibodies to binding to hOX40L-expressing CHO cells.

[0121] FIGURE 9 is a graph showing the OD450-540 value with increasing concentration of the indicated antibody in the presence of hOX40L to determine the ability of the indicated anti-OX40L antibodies to block the binding of hOX40L to hOX40.

[0122] FIGURE 10 is a graph showing the luminescence units (RLU) with increasing concentration of the indicated antibody in the presence of cells that express hOX40 and to determine the ability of the indicated anti-OX40L antibodies to block the binding of hOX40L to hOX40.

[0123] FIGURE 11A and FIGURE 11B are graphs showing the percent inhibition of OX40L and OX40L binding by the indicated antibody compared to a positive control.

[0124] FIGURE 12A - FIGURE 12C are graphs showing inhibition of IFNgamma response in PBMC-CD4 T cell mixed lymphocyte reaction (MLR) with 100 nM, 20 nM and 4 nM concentrations of indicated anti-OX40L antibodies.

[0125] FIGURE 13A and FIGURE 13B are a set of graphs showing the concentration of the indicated anti-OX40L antibody over time in the serum of cynomolgus monkeys after receiving a single dose of the indicated anti-OX40L antibody.

[0126] FIGURE 14 is a heatmap depicting the changes in cytokine / chemokine levels of thymus- and activation-regulated chemokine (TARC), macrophage-derived chemokine (MDC), interleukin (IL)-13, IL-5, interferon gamma (IFNg), tumor necrosis factor alpha (TNFa), IL-31, and granulocyte-macrophage colony-stimulating factor (GM-CSF) in allogeneic lymphocyte reaction experiments performed on myeloid dendritic cells (mDCs) primed with recombinant human TSLP and allogeneic CD4-positive cells from four healthy volunteers treated with test28IPTS / 200090251.1Goodwin Ref: PRG-062WO article, Antibody 5, Construct 114, a combination of Antibody 5 and Construct 114, tezepelumab, or amlitelimab, or unstimulated. Values are normalized to isotype control.DETAILED DESCRIPTIONDefinitions

[0127] Unless otherwise defined, all terms of art, notations and other scientific terminology used herein are intended to have the meanings commonly understood by those of skill in the art. In some cases, terms with commonly understood meanings are defined herein for clarity and / or for ready reference, and the inclusion of such definitions herein should not necessarily be construed to represent a difference over what is generally understood in the art. The techniques and procedures described or referenced herein are generally well understood and commonly employed using conventional methodologies by those skilled in the art, such as, for example, the widely utilized molecular cloning methodologies described in Sambrook et al., Molecular Cloning: A Laboratory Manual 4th ed. (2012) Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY. As appropriate, procedures involving the use of commercially available kits and reagents are generally carried out in accordance with manufacturer-defined protocols and conditions unless otherwise noted.

[0128] As used herein, the singular forms “a,” “an,” and “the” include plural references unless indicated otherwise.

[0129] It is understood that aspects and embodiments of the invention described herein include “comprising,” “consisting,” and “consisting essentially of’ aspects and embodiments.

[0130] For all compositions described herein, and all methods using a composition described herein, the compositions can either comprise the listed components or steps, or can “consist essentially of’ the listed components or steps. When a composition is described as “consisting essentially of’ the listed components, the composition contains the components listed, and may contain other components which do not substantially affect the condition being treated, but do not contain any other components which substantially affect the condition being treated other than those components expressly listed; or, if the composition does contain extra components other than those listed which substantially affect the condition being treated, the composition does not contain a sufficient concentration or amount of the extra components to substantially affect the condition being treated. When a method is described as “consisting essentially of’ the listed steps, the method contains the steps listed, and may contain other steps that do not substantially affect the condition being treated, but the method does not contain any other steps29IPTS / 200090251.1Goodwin Ref: PRG-062WO which substantially affect the condition being treated other than those steps expressly listed. As a non-limiting specific example, when a composition is described as “consisting essentially of’ a component, the composition may additionally contain any amount of pharmaceutically acceptable carriers, vehicles, or diluents and other such components which do not substantially affect the condition being treated.

[0131] The term “vector,” as used herein, refers to a nucleic acid molecule capable of propagating another nucleic acid to which it is linked. The term includes the vector as a selfreplicating nucleic acid structure as well as the vector incorporated into the genome of a host cell into which it has been introduced. Certain vectors are capable of directing the expression of nucleic acids to which they are operatively linked. Such vectors are referred to herein as “expression vectors.”

[0132] The terms “host cell,” “host cell line,” and “host cell culture” are used interchangeably herein and refer to cells into which an exogenous nucleic acid has been introduced, and the progeny of such cells. Host cells include “transformants” (or “transformed cells”) and “transfectants” (or “transfected cells”), which each include the primary transformed or transfected cell and progeny derived therefrom. Such progeny may not be completely identical in nucleic acid content to a parent cell, and may contain mutations. A “recombinant host cell” or “host cell” refers to a cell that includes an exogenous polynucleotide, regardless of the method used for insertion, for example, direct uptake, transduction, f-mating, or other methods known in the art to create recombinant host cells.

[0133] As used herein, the term “eukaryote” refers to organisms belonging to the phylogenetic domain Eukarya such as animals (including but not limited to, mammals, insects, reptiles, birds, etc.), ciliates, plants (including but not limited to, monocots, dicots, algae, etc.), fungi, yeasts, flagellates, microsporidia, protists, etc.

[0134] As used herein, the term “prokaryote” refers to prokaryotic organisms. For example, a non-eukaryotic organism can belong to the Eubacteria (including but not limited to, Escherichia coli, Thermus thermophilus, Bacillus stearothermophilus, Pseudomonas fluorescens, Pseudomonas aeruginosa, Pseudomonas putida, etc.) phylogenetic domain, or the Archaea (including but not limited to, Methanococcus jannaschii, Methanobacterium thermoautotrophicum, Halobacterium such as Haloferax volcanii and Halobacterium species NRC-1, Archaeoglobus fulgidus, Pyrococcus furiosus, Pyrococcus horikoshii, Aeuropyrum pernix, etc.) phylogenetic domain.

[0135] An “effective amount” or “therapeutically effective amount” as used herein refers to an amount of therapeutic compound, such as an anti-TSLP antibody, or antigen binding30IPTS / 200090251.1Goodwin Ref: PRG-062WO fragment thereof, or an anti-OX40L antibody, or antigen binding fragment thereof, administered to an individual, either as a single dose or as part of a series of doses, which is effective to produce or contribute to a desired therapeutic effect, either alone or in combination with another therapeutic modality. Examples of a desired therapeutic effect are reducing an aberrant immune response, slowing or delaying disease development; stabilization of disease; and amelioration of one or more symptoms. An effective amount may be given in one or more dosages.

[0136] The term “treating” (and variations thereof such as “treat” or “treatment”) refers to clinical intervention in an attempt to alter the natural course of a disease or condition in a subject in need thereof. Treatment can be performed during the course of clinical pathology. Desirable effects of treatment include preventing recurrence of disease, alleviation of symptoms, diminishment of any direct or indirect pathological consequences of the disease, decreasing the rate of disease progression, amelioration or palliation of the disease state, and remission or improved prognosis.

[0137] The term “sufficient amount” means an amount sufficient to produce a desired effect, e.g., an amount sufficient to modulate an immune response in a subject.

[0138] As used herein, the term “subject,” “patient,” or “individual” means a mammalian subject. Exemplary subjects include humans, monkeys, dogs, cats, mice, rats, cows, horses, camels, goats, rabbits, and sheep. In certain embodiments, the subject is a human. In some embodiments the subject has a disease or condition that can be treated with an antibody, or antigen binding fragment thereof, provided herein. In some aspects, the disease or condition is atopic dermatitis. In some aspects, the disease or condition is asthma.

[0139] The term “zzz vitro" refers to processes that occur in a living cell growing separate from a living organism, e.g., growing in tissue culture.

[0140] The term “zzz vzvo” refers to processes that occur in a living organism.

[0141] The term “package insert” is used to refer to instructions customarily included in commercial packages of therapeutic or diagnostic products (e.g., kits) that contain information about the indications, usage, dosage, administration, combination therapy, contraindications and / or warnings concerning the use of such therapeutic or diagnostic products.

[0142] The term “pharmaceutical composition” refers to a preparation which is in such form as to permit the biological activity of an active ingredient contained therein to be effective in treating a subject.

[0143] As used herein, the term “pharmaceutically acceptable” refers to those compounds, materials, compositions and / or dosage forms, which are suitable for contact with the tissues of a subject, such as a mammal (e.g., a human) without excessive toxicity, irritation, allergic31IPTS / 200090251.1Goodwin Ref: PRG-062WO response and other problem complications commensurate with a reasonable benefit / risk ratio. Preferably, the term “pharmaceutically acceptable” means approved by a regulatory agency of the Federal or a state government or listed in the U.S. Pharmacopeia or other generally recognized pharmacopeia for use in mammals, and more particularly in humans.

[0144] The terms “co-administration,” “co-administer,” and “in combination with” include the administration of two or more therapeutic agents either simultaneously, concurrently or sequentially within no specific time limits. In one embodiment, the agents are present in the cell or in the subject's body at the same time or exert their biological or therapeutic effect at the same time. In one embodiment, the therapeutic agents are in the same composition or unit dosage form. In other embodiments, the therapeutic agents are in separate compositions or unit dosage forms. In certain embodiments, a first agent can be administered prior to the administration of a second therapeutic agent.

[0145] The terms “modulate” and “modulation” refer to reducing or inhibiting or, alternatively, activating or increasing, a recited variable.

[0146] The terms “increase” and “activate” refer to an increase of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, 2-fold, 3-fold, 4-fold, 5-fold, 10-fold, 20- fold, 50-fold, 100-fold, or greater in a recited variable.

[0147] The terms “reduce” and “inhibit” refer to a decrease of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 75%, 80%, 85%, 90%, 95%, 2-fold, 3-fold, 4-fold, 5-fold, 10-fold, 20-fold, 50-fold, 100-fold, or greater in a recited variable.

[0148] The term “about” indicates and encompasses an indicated value and a range above and below that value. In certain embodiments, the term “about” indicates the designated value ± 10%, ± 5%, or ± 1%. In certain embodiments, where applicable, the term “about” indicates the designated value(s) ± one standard deviation of that value(s).

[0149] The term “agonize” refers to the activation of receptor signaling to induce a biological response associated with activation of the receptor. An “agonist” is an entity that binds to and agonizes a receptor.

[0150] The term “antagonize” refers to the inhibition of receptor signaling to inhibit a biological response associated with activation of the receptor. An “antagonist” is an entity that binds to and antagonizes a receptor.

[0151] For any of the structural and functional characteristics described herein, methods of determining these characteristics are known in the art.

[0152] The term “optionally” is meant, when used sequentially, to include from one to all of the enumerated combinations and contemplates all sub-combinations.32IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0153] The term “amino acid” refers to, for example, the twenty common naturally occurring amino acids. Naturally occurring amino acids include alanine (Ala; A), arginine (Arg; R), asparagine (Asn; N), aspartic acid (Asp; D), cysteine (Cys; C), glutamic acid (Glu; E), glutamine (Gin; Q), Glycine (Gly; G), histidine (His; H), isoleucine (He; I), leucine (Leu; L), lysine (Lys; K), methionine (Met; M), phenylalanine (Phe; F), proline (Pro; P), serine (Ser; S), threonine (Thr; T), tryptophan (Trp; W), tyrosine (Tyr; Y), and valine (Vai; V).

[0154] The term “affinity” refers to the strength of the sum total of non-covalent interactions between a single binding site of a molecule (e.g., an antibody) and its binding partner (e.g., an antigen or epitope). Unless indicated otherwise, as used herein, “affinity” refers to intrinsic binding affinity, which reflects a 1 : 1 interaction between members of a binding pair (e.g., antibody and antigen or epitope).

[0155] The term “kd” (sec-1), as used herein, refers to the dissociation rate constant of a particular antibody-antigen interaction. This value is also referred to as the koff value.

[0156] The term “ka” (M-l * sec- 1), as used herein, refers to the association rate constant of a particular antibody-antigen interaction. This value is also referred to as the kon value.

[0157] The term “KD” (M), as used herein, refers to the dissociation equilibrium constant of a particular antibody-antigen interaction. KD = kd / ka. In some embodiments, the affinity of an antibody is described in terms of the KD for an interaction between such antibody and its antigen. For clarity, as known in the art, a smaller KD value indicates a higher affinity interaction, while a larger KD value indicates a lower affinity interaction.

[0158] The term “KA” (M-l), as used herein, refers to the association equilibrium constant of a particular antibody-antigen interaction. KA = ka / kd.

[0159] As used herein, “administration” refers to providing or giving a subject a therapeutic agent (e.g., an anti-OX40L antibody, or antigen binding fragment thereof, and / or an anti-TSLP antibody, or antigen binding fragment thereof, described herein) by any effective route. Exemplary routes of administration are described herein below.

[0160] As used herein, the term “polypeptide” describes a single polymer in which the monomers are amino acid residues which are covalently conjugated together through amide bonds. A polypeptide is intended to encompass any amino acid sequence, either naturally occurring, recombinant, or synthetically produced.

[0161] As used herein, the terms “nucleic acid” and “polynucleotide,” used interchangeably herein, refer to a polymeric form of nucleosides in any length. Typically, a polynucleotide is composed of nucleosides that are naturally found in DNA or RNA (e.g., adenosine, thymidine, guanosine, cytidine, uridine, deoxyadenosine, deoxythymidine, deoxyguanosine, and33IPTS / 200090251.1Goodwin Ref: PRG-062WO deoxy cytidine) joined by phosphodiester bonds. The term encompasses molecules comprising nucleosides or nucleoside analogs containing chemically or biologically modified bases, modified backbones, etc., whether or not found in naturally occurring nucleic acids, and such molecules may be preferred for certain applications. Where this application refers to a polynucleotide it is understood that both DNA, RNA, and in each case both single- and doublestranded forms (and complements of each single-stranded molecule) are provided.

[0162] As used herein, the terms “conservative mutation,” “conservative substitution,” and “conservative amino acid substitution” refer to a substitution of one or more amino acids for one or more different amino acids that exhibit similar physicochemical properties, such as polarity, electrostatic charge, and steric volume. These properties are summarized for each of the twenty naturally occurring amino acids in TABLE 1 below.TABLE 1. Representative physicochemical properties of naturally occurring amino acids34IPTS / 200090251.1Goodwin Ref: PRG-062WOFrom this table it is appreciated that the conservative amino acid families include (i) G, A, V, L and I; (ii) D and E; (iii) C, S and T; (iv) H, K and R; (v) N and Q; and (vi) F, Y and W. A conservative mutation or substitution is therefore one that substitutes one amino acid for a member of the same amino acid family (e.g., a substitution of Ser for Thr or Lys for Arg).

[0163] The term “antibody” is used herein in its broadest sense and includes certain types of immunoglobulin molecules comprising one or more antigen-binding domains that specifically bind to an antigen or epitope. An antibody specifically includes intact antibodies (e.g., intact immunoglobulins), antibody fragments, and multi-specific antibodies.

[0164] An “anti-TSLP antibody,” “TSLP antibody,” or “TSLP specific antibody” is an antibody, as provided herein, which specifically binds to the antigen TSLP.

[0165] An “anti-OX40L antibody,” “OX40L antibody,” or “OX40L specific antibody” is an antibody, as provided herein, which specifically binds to the antigen OX40L.

[0166] The term “epitope” means a portion of an antigen that specifically binds to an antibody.

[0167] The term “hypervariable region” or “HVR”, as used herein, refers to each of the regions of an antibody variable domain which are hypervariable in sequence and / or form structurally defined loops (“hypervariable loops”).

[0168] The term “antigen-binding domain” means the portion of an antibody that is capable of specifically binding to an antigen or epitope.

[0169] The term “chimeric antibody” refers to an antibody in which a portion of the heavy and / or light chain is derived from a particular source or species, while the remainder of the heavy and / or light chain is derived from a different source or species.35IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0170] The term “human antibody” or “fully human antibody” refers to an antibody which possesses an amino acid sequence corresponding to that of an antibody produced by a human or a human cell, or derived from a non-human source that utilizes a human antibody repertoire or human antibody-encoding sequences (e.g., obtained from human sources or designed de novo). Human antibodies specifically exclude humanized antibodies.

[0171] The term “humanized antibody” refers to a protein having a sequence that differs from the sequence of an antibody derived from a non-human species by one or more amino acid substitutions, deletions, and / or additions, such that the humanized antibody is less likely to induce an immune response, and / or induces a less severe immune response, as compared to the non-human species antibody, when it is administered to a human subject.

[0172] The term “multispecific antibody” refers to an antibody that comprises two or more different antigen-binding domains that collectively specifically bind two or more different epitopes.

[0173] A “monospecific antibody” is an antibody that comprises one or more binding sites that specifically bind to a single epitope. An example of a monospecific antibody is a naturally occurring IgG molecule which, while divalent (z.e., having two antigen-binding domains), recognizes the same epitope at each of the two antigen-binding domains. The binding specificity may be present in any suitable valency.

[0174] The term “monoclonal antibody” refers to an antibody from a population of substantially homogeneous antibodies. A population of substantially homogeneous antibodies comprises antibodies that are substantially similar and that bind the same epitope(s), except for variants that may normally arise during production of the monoclonal antibody. Such variants are generally present in only minor amounts. A monoclonal antibody is typically obtained by a process that includes the selection of a single antibody from a plurality of antibodies. For example, the selection process can be the selection of a unique clone from a plurality of clones, such as a pool of hybridoma clones, phage clones, yeast clones, bacterial clones, or other recombinant DNA clones. The selected antibody can be further altered, for example, to improve affinity for the target (“affinity maturation”), to humanize the antibody, to improve its production in cell culture, and / or to reduce its immunogenicity in a subject.

[0175] The term “single-chain” refers to a molecule comprising amino acid monomers linearly linked by peptide bonds. In a particular such embodiment, the C-terminus of the Fab light chain is connected to the N-terminus of the Fab heavy chain in the single-chain Fab molecule. As described in more detail herein, an scFv has a variable domain of light chain (VL) connected from its C-terminus to the N-terminal end of a variable domain of heavy chain (VH)36IPTS / 200090251.1Goodwin Ref: PRG-062WO by a polypeptide chain. Alternately the scFv comprises a polypeptide chain wherein the C- terminal end of the VH is connected to the N-terminal end of VL by a polypeptide chain.

[0176] The “Fab fragment” (also referred to as fragment antigen-binding) contains the constant domain (CL) of the light chain and the first constant domain (CHI) of the heavy chain along with the variable domains VL and VH on the light and heavy chains, respectively. The variable domains comprise the complementarity determining loops (CDR, also referred to as hypervariable region (HVR)) that are involved in antigen-binding. Fab' fragments differ from Fab fragments by the addition of a few residues at the carboxy terminus of the heavy chain CHI domain including one or more cysteines from the antibody hinge region.

[0177] “F(ab’)2” fragments contain two Fab’ fragments joined, near the hinge region, by disulfide bonds. F(ab’)2 fragments may be generated, for example, by recombinant methods or by pepsin digestion of an intact antibody. The F(ab’) fragments can be dissociated, for example, by treatment with B-mercaptoethanol.

[0178] “Fv” fragments comprise a non-covalently-linked dimer of one heavy chain variable domain and one light chain variable domain.

[0179] “Single-chain Fv” or “sFv” or “scFv” includes the VH and VL domains of an antibody, wherein these domains are present in a single polypeptide chain. In one embodiment, the Fv polypeptide further comprises a polypeptide linker between the VH and VL domains which enables the scFv to form the desired structure for antigen-binding. For a review of scFv, see Pluckthun in The Pharmacology of Monoclonal Antibodies, vol. 113, Rosenburg and Moore eds., Springer-Verlag, New York, pp. 269-315 (1994). HER2 antibody scFv fragments are described in WO93 / 16185; U.S. Pat. No. 5,571,894; and U.S. Pat. No. 5,587,458.

[0180] “ scFv-Fc” fragments comprise an scFv attached to an Fc domain. For example, an Fc domain may be attached to the C-terminal of the scFv. The Fc domain may follow the VH or VL, depending on the orientation of the variable domains in the scFv (z.e., VH -VL or VL -VH). Any suitable Fc domain known in the art or described herein may be used. In some cases, the Fc domain comprises an IgG4 Fc domain.

[0181] The term “single domain antibody” or “sdAb” refers to a molecule in which one variable domain of an antibody specifically binds to an antigen without the presence of the other variable domain. Single domain antibodies, and fragments thereof, are described in Arabi Ghahroudi et al., (1998) FEBS Letters 414:521-526 and Muyldermans et al. (2001) Trends in Biochem. Sci. 26:230-245, each of which is incorporated by reference in its entirety. Single domain antibodies are also known as sdAbs or nanobodies. SdAbs are fairly stable and easy to express as fusion partner with the Fc chain of an antibody (Harmsen MM, De Haard HJ (2007) 37IPTS / 200090251.1Goodwin Ref: PRG-062WO“Properties, production, and applications of camelid single-domain antibody fragments” AppL Microbiol Biotechnol. 77(1): 13-22).

[0182] The terms “full length antibody,” “intact antibody,” and “whole antibody” are used herein interchangeably to refer to an antibody having a structure substantially similar to a naturally occurring antibody structure and having heavy chains that comprise an Fc region. For example, when used to refer to an IgG molecule, a “full length antibody” is an antibody that comprises two heavy chains and two light chains.

[0183] The term “antibody fragment” refers to an antibody that comprises a portion of an intact antibody, such as the antigen-binding or variable region of an intact antibody. Antibody fragments include, for example, Fv fragments, Fab fragments, F(ab’)2 fragments, Fab’ fragments, scFv (sFv) fragments, and scFv-Fc fragments.

[0184] The term “Fc domain” or “Fc region” herein is used to define a C-terminal region of an immunoglobulin heavy chain that contains at least a portion of the constant region. The term includes native sequence Fc regions and variant Fc regions.

[0185] The term “substantially purified” refers to a construct described herein, or variant thereof that may be substantially or essentially free of components that normally accompany or interact with the protein as found in its naturally occurring environment, i.e. a native cell, or host cell in the case of recombinantly produced antibody that in certain embodiments, is substantially free of cellular material includes preparations of protein having less than about 30%, less than about 25%, less than about 20%, less than about 15%, less than about 10%, less than about 5%, less than about 4%, less than about 3%, less than about 2%, or less than about 1% (by dry weight) of contaminating protein.

[0186] The term percent “identity,” in the context of two or more nucleic acid or polypeptide sequences, refer to two or more sequences or subsequences that have a specified percentage of nucleotides or amino acid residues that are the same, when compared and aligned for maximum correspondence, as measured using one of the sequence comparison algorithms described below (e.g., using publicly available computer software such as BLAST, BLASTP, BLASTN, BLAST- 2, ALIGN, MEGALIGN (DNASTAR), CLUSTALW, CLUSTAL OMEGA, or MUSCLE software or other algorithms available to persons of skill) or by visual inspection. Software for performing BLAST analyses is publicly available through the National Center for Biotechnology Information (ncbi.nlm.nih.gov). Those skilled in the art can determine appropriate parameters for aligning sequences, including any algorithms needed to achieve maximal alignment over the full length of the sequences being compared. Depending on the application, the percent38IPTS / 200090251.1Goodwin Ref: PRG-062WO“identity” can exist over a region of the sequence being compared, e.g., over a functional domain, or, alternatively, exist over the full length of the two sequences to be compared.

[0187] For sequence comparison, typically one sequence acts as a reference sequence to which test sequences are compared. When using a sequence comparison algorithm, test and reference sequences are input into a computer, subsequence coordinates are designated, if necessary, and sequence algorithm program parameters are designated. The sequence comparison algorithm then calculates the percent sequence identity for the test sequence(s) relative to the reference sequence, based on the designated program parameters.

[0188] Optimal alignment of sequences for comparison can be conducted, e.g., by the local homology algorithm of Smith & Waterman, (1981) Adv. AppL Math. 2:482, by the homology alignment algorithm of Needleman & Wunsch, (1970) J. Mol. Biol. 48:443, by the search for similarity method of Pearson & Lipman, (1988) Proc. Nat’l. Acad. Sci. USA 85:2444, by computerized implementations of these algorithms (GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package, Genetics Computer Group, 575 Science Dr., Madison, Wis.), or by visual inspection (see generally Ausubel et al., supra).

[0189] One example of an algorithm that is suitable for determining percent sequence identity and sequence similarity is the BLAST algorithm, which is described in Altschul et al. (1990) J. Mol. Biol. 215:403-410. Software for performing BLAST analyses is publicly available through the National Center for Biotechnology Information (www.ncbi.nlm.nih.gov / ).

[0190] Ranges recited herein are understood to be shorthand for all of the values within the range, inclusive of the recited endpoints. For example, a range of 1 to 50 is understood to include any number, combination of numbers, or sub-range from the group consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, and 50.

[0191] It must be noted that, as used in the specification and the appended claims, the singular forms “a,” “an” and “the” include plural referents unless the context clearly dictates otherwise.

[0192] The term “atopic dermatitis disease severity outcome measure” refers to a determination of certain signs, symptoms, features or parameters that have been associated with atopic dermatitis and that can be quantitatively or qualitatively assessed. Exemplary atopic dermatitis disease severity outcome measures include "Eczema Area and Severity Index" (EASI), "Severity Scoring of Atopic Dermatitis" (SCORAD), "Validated Investigator Global Assessment-Atopic Dermatitis" (vIGA-AD), "Investigator Global Assessment of Signs" (IGSA), Rajka / Langeland Atopic Dermatitis Severity Score, “Body Surface Area” (BSA), and Patient-39IPTS / 200090251.1Goodwin Ref: PRG-062WOReported Outcomes including Pruritus Visual Analog Scale (an aspect of disease severity assessed as part of SCORAD), Sleep Loss Visual Analog Scale (an aspect of disease severity assessed as part of SCORAD), Atopic Dermatitis Symptom Diary (ADSD), Atopic Dermatitis Impact Questionnaire (ADIQ), Dermatology Life Quality Index (DLQI) (Finlay and Khan, Clin Exper Dermatol 1994; 19:210), 5-D Itch Scale (Elman et al., Br J Dermatol 2010;162(3):587- 593), Itch Numeric Rating Scale (LNRS) (see Naegeli et al., International Journal of Dermatology. 2015;54(6):715-722; and Newton L, el al., J. Patient Rep. Outcomes. 2019;3(l):42), and the Patient-Oriented Eczema Measure (POEM) (www.nottingham.ac.uk / research / groups / cebd / resources / poem.aspx).Anti-TSLP and Anti-OX40L AntibodiesAntibody Structure

[0193] The present application provides antibodies, or antigen binding fragments thereof, and compositions comprising an antibody, or antigen binding fragment thereof, which binds TSLP and an antibody, or antigen binding fragment thereof, which binds OX40L. In certain embodiments, the TSLP and / or OX40L antibody, or antigen binding fragment thereof, is an antibody comprising a modified Fc region.

[0194] The recognized immunoglobulin genes include the kappa, lambda, alpha, gamma, delta, epsilon and mu constant region genes, as well as the myriad immunoglobulin variable region genes. Light chains are classified as either kappa or lambda. There are four subtypes of human lambda light chain constant region ( i, 2, 3, 7), which are encoded by the genes IGLC1, IGCL2, IGLC3, and IGLC7. The “class” of an antibody or immunoglobulin refers to the type of constant domain or constant region possessed by its heavy chain. There are five major classes of antibodies: IgA, IgD, IgE, IgG, and IgM, and several of these may be further divided into subclasses (isotypes), e.g., IgGl, IgG2, IgG3, IgG4, IgAl, and IgA2. The heavy chain constant domains that correspond to the different classes of immunoglobulins are called a, 5, a, y, and p, respectively.

[0195] An exemplary immunoglobulin (antibody) structural unit is composed of two pairs of polypeptide chains, each pair having one “light” (about 25 kD) and one “heavy” chain (about 50- 70 kD). The N-terminal domain of each chain defines a variable region of about 100 to 110 or more amino acids primarily responsible for antigen recognition. The terms variable light chain (VL) and variable heavy chain (VH) refer to these light and heavy chain domains, respectively. The IgGl heavy chain comprises the VH, CHI, CH2, and CH3 domains, respectively from the40IPTS / 200090251.1Goodwin Ref: PRG-062WON- to C-terminus. The light chain comprises the VL and CL domains from N- to C-terminus. The IgGl heavy chain comprises a hinge between the CHI and CH2 domains. In certain embodiments, the immunoglobulin constructs comprise at least one immunoglobulin domain from IgG, IgM, IgA, IgD, or IgE connected to a therapeutic polypeptide. In some embodiments, the immunoglobulin domain found in an antibody provided herein, is from or is derived from an immunoglobulin-based construct such as a diabody or a nanobody. In certain embodiments, the immunoglobulin constructs described herein comprise at least one immunoglobulin domain from a heavy chain antibody such as a camelid antibody. In certain embodiments, the immunoglobulin constructs provided herein comprise at least one immunoglobulin domain from a mammalian antibody such as a bovine antibody, a human antibody, a camelid antibody, a mouse antibody or any chimeric antibody.

[0196] In some embodiments, the antibodies provided herein comprise a heavy chain. In one embodiment, the heavy chain is an IgA. In one embodiment, the heavy chain is an IgD. In one embodiment, the heavy chain is an IgE. In one embodiment, the heavy chain is an IgG. In one embodiment, the heavy chain is an IgM. In one embodiment, the heavy chain is an IgGl. In one embodiment, the heavy chain is an IgG2. In one embodiment, the heavy chain is an IgG3. In one embodiment, the heavy chain is an IgG4. In one embodiment, the heavy chain is an IgAl. In one embodiment, the heavy chain is an IgA2.

[0197] In some embodiments, an antibody is an IgGl antibody. In some embodiments, an antibody is an IgG3 antibody. In some embodiments, an antibody is an IgG2 antibody. In some embodiments, an antibody is an IgG4 antibody.

[0198] Generally, native four-chain antibodies comprise six hypervariable regions (HVRs); three in the VH (Hl, H2, and H3), and three in the VL (LI, L2, and L3). HVRs generally comprise amino acid residues from the hypervariable loops and / or from the complementarity determining regions (CDRs), the latter being of highest sequence variability and / or involved in antigen recognition. With the exception of CDR1 in VH, CDRs generally comprise the amino acid residues that form the hypervariable loops. HVRs are also referred to as “complementarity determining regions” (CDRs), and these terms are used herein interchangeably in reference to portions of the variable region that form the antigen-binding regions. This particular region has been described by Kabat et al., U.S. Dept, of Health and Human Services, Sequences of Proteins of Immunological Interest (1983) and by Chothia c / a / . (1987) J Mol Biol 196:901-917, where the definitions include overlapping or subsets of amino acid residues when compared against each other. Nevertheless, application of either definition to refer to a CDR of an antibody or variants thereof is intended to be within the scope of the term as defined and used herein. The41IPTS / 200090251.1Goodwin Ref: PRG-062WO exact residue numbers which encompass a particular CDR will vary depending on the sequence and size of the CDR. Those skilled in the art can routinely determine which residues comprise a particular CDR given the variable region amino acid sequence of the antibody.

[0199] The amino acid sequence boundaries of a CDR can be determined by one of skill in the art using any of a number of known numbering schemes, including those described by Kabat et cd.. supra (“Kabat” numbering scheme); Al-Lazikani et al. (1997) J. Mol. Biol., 273:927-948 (“Chothia” numbering scheme); MacCallum et al. (1996) J. Mol. Biol. 262'.'l32-'l 45 (“Contact” numbering scheme); Lefranc et al. (2003) Dev. Comp. Immunol. 27:55-77 (“IMGT” numbering scheme); and Honegge and Pliickthun (2001) J. Mol. Biol. 309:657-70 (“AHo” numbering scheme); each of which is incorporated by reference in its entirety.

[0200] TABLE 2 provides the positions of CDR-L1, CDR-L2, CDR-L3, CDR-H1, CDR- H2, and CDR-H3 as identified by the Kabat and Chothia schemes. For CDR-H1, residue numbering is provided using both the Kabat and Chothia numbering schemes.

[0201] CDRs may be assigned, for example, using antibody numbering software, such as Abnum, available at www.bioinf.org.uk / abs / abnum / , and described in Abhinandan and Martin, Immunology, 2008, 45:3832-3839, incorporated by reference in its entirety.TABLE 2. Residues in CDRs according to Kabat and Chothia numbering schemes* The C-terminus of CDR-H1, when numbered using the Kabat numbering convention, varies between H32 and H34, depending on the length of the CDR.

[0202] The “EU numbering scheme” is generally used when referring to a residue in an antibody heavy chain constant region (e.g., as reported in Kabat et al., supra). Unless stated otherwise, the EU numbering scheme is used to refer to residues in antibody heavy chain constant regions described herein.

[0203] One example of an antigen-binding domain is an antigen-binding domain formed by a VH-VL dimer of an antibody. Another example of an antigen-binding domain is an antigenbinding domain formed by diversification of certain loops from the tenth fibronectin type III domain of an Adnectin. An antigen-binding domain can include CDRs 1, 2, and 3 from a heavy chain in that order; and CDRs 1, 2, and 3 from a light chain in that order.42IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0204] Epitopes frequently consist of surface-accessible amino acid residues and / or sugar side chains and may have specific three-dimensional structural characteristics, as well as specific charge characteristics. Conformational and non-conformational epitopes are distinguished in that the binding to the former but not the latter may be lost in the presence of denaturing solvents. An epitope may comprise amino acid residues that are directly involved in the binding, and other amino acid residues, which are not directly involved in the binding. The epitope to which an antibody binds can be determined using known techniques for epitope determination such as, for example, testing for antibody binding to TSLP or OX40L variants with different pointmutations, or to chimeric TSLP or OX40L variants.

[0205] To screen for antibodies which bind to an epitope on a target antigen bound by an antibody of interest (e.g., TSLP and / or OX40L), a routine cross-blocking assay such as that described in Antibodies, A Laboratory Manual, Cold Spring Harbor Laboratory, Ed Harlow and David Lane (1988), can be performed. Alternatively, or additionally, epitope mapping can be performed by methods known in the art.

[0206] Anti-TSLP and anti-OX40L antibodies can include those described herein such as the clones set forth in the drawings and / or tables. In some embodiments, the antibody comprises an alternative scaffold. In some embodiments, the antibody consists of an alternative scaffold. In some embodiments, the antibody consists essentially of an alternative scaffold. In some embodiments, the antibody comprises an antibody fragment. In some embodiments, the antibody consists of an antibody fragment. In some embodiments, the antibody consists essentially of an antibody fragment.

[0207] In some embodiments, the antibodies are monoclonal antibodies.

[0208] In some embodiments, the antibodies are polyclonal antibodies.

[0209] In some embodiments, the antibodies are produced by hybridomas. In other embodiments, the antibodies are produced by recombinant cells engineered to express the desired variable and constant domains.

[0210] In some embodiments, the antibodies may be single chain antibodies or other antibody derivatives retaining the antigen specificity and the lower hinge region or a variant thereof.

[0211] In some embodiments, the antibodies may be polyfunctional antibodies, recombinant antibodies, fully human antibodies, humanized antibodies, or fragments or variants thereof. In particular embodiments, the antibody fragment or a derivative thereof is selected from a Fab fragment, a Fab '2 fragment, a CDR and scFv.43IPTS / 200090251.1Goodwin Ref: PRG-062WOAnti-TSLP Antibodies

[0212] The present application provides antibodies or antigen binding fragments thereof and compositions comprising an antibody, or an antigen binding fragment thereof, which binds TSLP. In some embodiments, an anti-TSLP antibody, or antigen binding fragment thereof, described herein is selected from tezepelumab, GR2002 (described in U.S. Patent Application Publication No. US 2024 / 0132581, which is incorporated herein by reference), TQC2731 (also known as BSI-045B and bosakitug, described in U.S. Patent Application Publication No. US 2022 / 0289833, which is incorporated herein by reference), solrikitug, hu23bl2 (described in U.S. Patent No. 8,232,372, which is incorporated herein by reference), 43B1-H2L2 (described in U.S. Patent Application Publication No. US 2022 / 0363781, which is incorporated herein by reference), and 43B1-H6L1 (also described in U.S. Patent Application Publication No. US 2022 / 0363781) or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, tezepelumab comprises a variable heavy (VH) chain sequence having the amino acid sequence of SEQ ID NO: 34 and a variable light (VL) chain sequence having the amino acid sequence of SEQ ID NO: 441 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, TQC2731 comprises a VH chain sequence having the amino acid sequence of SEQ ID NO: 489 and a VL chain sequence having the amino acid sequence of SEQ ID NO: 490 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, solrikitug comprises a VH chain sequence having the amino acid sequence of SEQ ID NO: 497 and a VL chain sequence having the amino acid sequence of SEQ ID NO: 498 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, hu23bl2 comprises a VH chain sequence having the amino acid sequence of SEQ ID NO: 442 and a VL chain sequence having the amino acid sequence of SEQ ID NO: 443 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, 43B1-H2L2 comprises a VH chain sequence having the amino acid sequence of SEQ ID NO: 444 and a VL chain sequence having the amino acid sequence of SEQ ID NO: 445 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, 43B1-H6L1 comprises a VH chain sequence having the amino acid sequence of SEQ ID NO: 446 and a VL chain sequence having the amino acid sequence of SEQ ID NO: 447 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, tezepelumab comprises a44IPTS / 200090251.1Goodwin Ref: PRG-062WO heavy chain having the amino acid sequence of SEQ ID NO: 485 and a light chain sequence having the amino acid sequence of SEQ ID NO: 486 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, TQC2731 comprises a heavy chain having the amino acid sequence of SEQ ID NO: 487 and a light chain sequence having the amino acid sequence of SEQ ID NO: 488 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, solrikitug comprises a heavy chain having the amino acid sequence of SEQ ID NO: 499 and a light chain sequence having the amino acid sequence of SEQ ID NO: 500 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, hu23bl2 comprises a heavy chain having the amino acid sequence of SEQ ID NO: 491 and a light chain sequence having the amino acid sequence of SEQ ID NO: 492 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, 43B1-H2L2 comprises a heavy chain having the amino acid sequence of SEQ ID NO: 493 and a light chain sequence having the amino acid sequence of SEQ ID NO: 494 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. In some embodiments, 43B1-H6L1 comprises a heavy chain having the amino acid sequence of SEQ ID NO: 495 and a light chain sequence having the amino acid sequence of SEQ ID NO: 496 or a variant thereof comprising an Fc region with one or more amino acid substitutions as described herein. Additional anti-TSLP antibodies are described in PCT Application No. PCT / US2025 / 034623, which is incorporated herein by reference in its entirety. In some embodiments, an anti-TSLP antibody, or antigen binding fragment thereof, described herein is selected from an anti-TSLP antibody, or antigen binding fragment thereof, described therein. Further TSLP antibodies are described in U.S. Patent No. 8,232,372 and U.S. Patent Application Publication No. US 2022 / 0363781, each of which is incorporated herein by reference in its entirety.

[0213] Sequences of exemplary anti-TSLP antibodies, or antigen binding fragments thereof, are provided in TABLE 3, TABLE 4, TABLE 12, and TABLE 13.45IPTS / 200090251.1Goodwin Ref: PRG-062WOSequences of Exemplary Anti-TSLP AntibodiesTABLE 3. Sequences of anti-TSLP antibody constructs - CDRs46 PTS / 200090251.1Goodwin Ref: PRG-062WO47PTS / 200090251.1Goodwin Ref: PRG-062WO48PTS / 200090251.1Goodwin Ref: PRG-062WO49PTS / 200090251.1Goodwin Ref: PRG-062WO50PTS / 200090251.1Goodwin Ref: PRG-062WO51PTS / 200090251.1Goodwin Ref: PRG-062WO52PTS / 200090251.1Goodwin Ref: PRG-062WO53PTS / 200090251.1Goodwin Ref: PRG-062WO54PTS / 200090251.1Goodwin Ref: PRG-062WO55PTS / 200090251.1Goodwin Ref: PRG-062WO56PTS / 200090251.1Goodwin Ref: PRG-062WOTABLE 4. Sequences of anti-TSLP antibody constructs - VH and VL57IPTS / 200090251.1Goodwin Ref: PRG-062WO58IPTS / 200090251.1Goodwin Ref: PRG-062WO59IPTS / 200090251.1Goodwin Ref: PRG-062WO60IPTS / 200090251.1Goodwin Ref: PRG-062WO61IPTS / 200090251.1Goodwin Ref: PRG-062WO62IPTS / 200090251.1Goodwin Ref: PRG-062WO63IPTS / 200090251.1Goodwin Ref: PRG-062WOAnti-TSLP VH Domains

[0214] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence selected from any one of SEQ ID NOs: 32-36 and 452.

[0215] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in any one of SEQ ID NOs: 32-36 and 452. In some embodiments, an antibody provided herein comprises a VH sequence provided in any one of SEQ ID NOs: 32-36 and 452, with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.Anti-TSLP VL Domains

[0216] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VL sequence selected from any one of SEQ ID NOs: 37-45, 402-438, and 505-518.

[0217] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in any one of SEQ ID NOs: 37-45, 402-438, and 505-518. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VL sequence provided in any one of SEQ ID NOs: 37-45, 402-438,64IPTS / 200090251.1Goodwin Ref: PRG-062WO and 505-518, with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.Anti-TSLP VH-VL Combinations

[0218] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence selected from any one of SEQ ID NOs: 32-36 and 452; and a VL sequence selected from any one of SEQ ID NOs: 37-45, 402-438, and 505-518,

[0219] In certain aspects, any one of SEQ ID NOs: 32-36 and 452 can be combined with any one of SEQ ID NOs: 37-45, 402-438, and 505-518.

[0220] In certain aspects, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence of a construct provided in TABLE 4 (e.g., a VH sequence and a VL sequence from the same row of TABLE 4). In certain aspects, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence of a construct provided in TABLE 13 (e.g., a VH sequence and a VL sequence from the same row of TABLE 13).

[0221] In certain aspects, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence of a construct provided in PCT Application No. PCT / US2025 / 034623, incorporated by reference herein in its entirety. In certain aspects, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence from Table 4 or Table 11 in PCT Application No. PCT / US2025 / 034623 (e.g., a VH sequence and a VL sequence from the same row of Table 4 or Table 11).

[0222] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in any one of SEQ ID NOs: 32-36 and 452; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in any one of SEQ ID NOs: 37-45, 402- 438, and 505-518. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence provided in any one of SEQ ID NOs: 32-36 and 452,65IPTS / 200090251.1Goodwin Ref: PRG-062WO with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions, and a VL sequence provided in any one of SEQ ID NOs: 37-45, 402-438, and 505- 518, with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0223] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 32 and a VL sequence set forth in SEQ ID NO: 37.

[0224] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 33 and a VL sequence set forth in SEQ ID NO: 38.

[0225] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 452 and a VL sequence set forth in SEQ ID NO: 39.

[0226] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 33 and a VL sequence set forth in SEQ ID NO: 40.

[0227] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 34 and a VL sequence set forth in SEQ ID NO: 41.

[0228] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 35 and a VL sequence set forth in SEQ ID NO: 42.

[0229] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 34 and a VL sequence set forth in SEQ ID NO: 43.

[0230] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 32 and a VL sequence set forth in SEQ ID NO: 44.

[0231] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 36 and a VL sequence set forth in SEQ ID NO: 45.

[0232] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 34 and a VL sequence set forth in SEQ ID NO: 415.

[0233] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 34 and a VL sequence set forth in SEQ ID NO: 421.

[0234] In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a heavy chain comprising a human IgG 66IPTS / 200090251.1Goodwin Ref: PRG-062WO sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270. In certain embodiments, the heavy chain comprises a human IgG sequence selected from SEQ ID NO: 61 and SEQ ID NO: 173.

[0235] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 34; a VL sequence set forth in SEQ ID NO: 41; and the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270. In certain embodiments, the heavy chain comprises a human IgG sequence selected from SEQ ID NO: 61 and SEQ ID NO: 173. In certain embodiments of any of the antibodies described above, the antibody, or antigen binding fragment thereof, further comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 453.

[0236] Although a C-terminal lysine may be present in the corresponding coding sequence of the constant heavy chain region (e.g., in a sequence encoding any one of SEQ ID NOs: 159- 270), it may be cleaved off during manufacture or after administration (resulting in, e.g., a constant heavy chain sequence of any one of SEQ ID NOs: 47-158). Accordingly, any of the antibodies or antigen binding fragments thereof described above may comprise a human IgG sequence containing a C-terminal lysine (e.g., any one of SEQ ID NOs: 159-270), a human IgG sequence lacking a C-terminal lysine (e.g., any one of SEQ ID NOs: 47-158), or a mixture thereof (e.g., a mixture of the same heavy chain constant region sequence with and without a C- terminal lysine, such as a mixture of SEQ ID NO: 173 and SEQ ID NO: 61).

[0237] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 41, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human lambda light chain constant region (e.g., a lambda light chain constant region of subtype 1, 2, 3, or 7, such as a lambda light chain constant region set forth in any one of SEQ ID NOs: 453-456). In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 41, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 34; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 41, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human lambda light chain constant region (e.g., a lambda light chain67IPTS / 200090251.1Goodwin Ref: PRG-062WO constant region of subtype 1, 2, 3, or 7, such as a lambda light chain constant region set forth in any one of SEQ ID NOs: 453-456). In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 34; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 41, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 453.

[0238] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 41, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453. In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 41, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453. In some embodiments, the antibody comprises a heavy chain sequence set forth in SEQ ID NO: 457 or 459 and a light chain sequence set forth in SEQ ID NO: 458. In some embodiments, the antibody comprises a heavy chain sequence set forth in SEQ ID NO: 457 and a light chain sequence set forth in SEQ ID NO: 458. The heavy chain sequence of SEQ ID NO: 457 contains a C-terminal lysine, which may be cleaved off during manufacture or after administration, resulting in an antibody containing the heavy chain sequence of SEQ ID NO: 459.

[0239] In n certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 43, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human lambda light chain constant region (e.g., a lambda light chain constant region of subtype 1, 2, 3, or 7, such as a lambda light chain constant region set forth in any one of SEQ ID NOs: 453-456). In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 43, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH68IPTS / 200090251.1Goodwin Ref: PRG-062WO sequence provided in SEQ ID NO: 34; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 43, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human lambda light chain constant region (e.g., a lambda light chain constant region of subtype 1, 2, 3, or 7, such as a lambda light chain constant region set forth in any one of SEQ ID NOs: 453-456). In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 34; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 43, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 453.

[0240] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 43, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453. In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 34, a VL sequence set forth in SEQ ID NO: 43, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 453. In some embodiments, the antibody comprises a heavy chain sequence set forth in SEQ ID NO: 460 and a light chain sequence set forth in SEQ ID NO: 461. The heavy chain sequence of SEQ ID NO: 460 contains a C-terminal lysine, which may be cleaved off during manufacture or after administration.Anti-TSLP CDRs

[0241] In some embodiments, disclosed herein is an antibody, or antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the CDRs of TABLE 3. In some embodiments, disclosed herein is an antibody, or antigen binding fragment thereof, comprising 6 of the Kabat CDRs of TABLE 3, 6 of the Chothia CDRs of TABLE 3, or 6 of the IMGT CDRs of TABLE 3. In some embodiments, the antibody, or antigen binding fragment thereof, comprises 6 of the69IPTS / 200090251.1Goodwin Ref: PRG-062WOKabat CDRs, 6 of the Chothia CDRs, or 6 of the IMGT CDRs from a single row of TABLE 3 (e.g., 6 CDRs from the same antibody).

[0242] In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the CDRs of TABLE 12. In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 6 of the Kabat CDRs of TABLE 12, 6 of the Chothia CDRs of TABLE 12, or 6 of the IMGT CDRs of TABLE 12. In some embodiments, the antibody, or an antigen binding fragment thereof, comprises 6 of the Kabat CDRs, 6 of the Chothia CDRs, or 6 of the IMGT CDRs from a single row of TABLE 12 e.g., 6 CDRs from the same antibody).

[0243] In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the CDRs of an antibody provided in PCT Application No. PCT / US2025 / 034623, incorporated by reference herein in its entirety, such as 1, 2, 3, 4, 5, or 6 of the CDRs in Table 3 or Table 10 in PCT Application No.PCT / US2025 / 034623. In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the Kabat CDRs of an antibody, or an antigen binding fragment thereof, provided in PCT Application No. PCT / US2025 / 034623. In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the Chothia CDRs of an antibody, or an antigen binding fragment thereof, provided in PCT Application No. PCT / US2025 / 034623. In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the IMGT CDRs of an antibody provided in PCT Application No. PCT / US2025 / 034623. In some embodiments, the antibody, or an antigen binding fragment thereof, comprises 6 of the Kabat CDRs, 6 of the Chothia CDRs, or 6 of the IMGT CDRs from a single row of Table 3 or Table 10 in in PCT Application No. PCT / US2025 / 034623 (e.g., 6 CDRs from the same antibody).

[0244] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises one to three CDRs of a VH domain selected from any one of SEQ ID NOs: 32- 36 and 452. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises two to three CDRs of a VH domain selected from any one of SEQ ID NOs: 32- 36 and 452. In some embodiments, an antibody provided herein comprises three CDRs of a VH domain selected from any one of SEQ ID NOs: 32-36 and 452. In some aspects, the CDRs are Kabat CDRs. In some aspects, the CDRs are Chothia CDRs. In some aspects, the CDRs are IMGT CDRs. In some aspects, the CDRs are AbM CDRs. In some aspects, the CDRs are Contact CDRs.70IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0245] In some embodiments, the CDRs are CDRs having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% identity to a CDR-H1, CDR-H2, or CDR- H3 selected from SEQ ID NOs: 1-18. In some embodiments, the CDR-H1 is a CDR-H1 of a VH domain selected from any one of SEQ ID NOs: 32-36 and 452, with up to 1, 2, 3, 4, or 5 amino acid substitutions. In some embodiments, the CDR-H2 is a CDR-H2 of a VH domain selected from any one of SEQ ID NOs: 32-36 and 452, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some embodiments, the CDR-H3 is a CDR-H3 of a VH domain selected from any one of SEQ ID NOs: 32-36 and 452, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0246] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises one to three CDRs of a VL domain selected from any one of SEQ ID NOs: 37- 45, 402-438, and 505-518. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises two to three CDRs of a VL domain selected from any one of SEQ ID NOs: 37-45, 402-438, and 505-518. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises three CDRs of a VL domain selected from any one of SEQ ID NOs: 37-45, 402-438, and 505-518. In some aspects, the CDRs are Kabat CDRs. In some aspects, the CDRs are Chothia CDRs. In some aspects, the CDRs are IMGT CDRs. In some aspects, the CDRs are AbM CDRs. In some aspects, the CDRs are Contact CDRs.

[0247] In some embodiments, the CDRs are CDRs having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% identity to a CDR-L1, CDR-L2, or CDR- L3 of any of SEQ ID NOs: 19-31, 345-401, 501-504, 533, and the amino acid sequences DVS, DDS, EDS, DDT, DDK, DDL, and DDN. In some embodiments, the CDR-L1 is a CDR-L1 of a VL domain of any one of SEQ ID NOs: 37-45, 402-438, and 505-518, with up to 1, 2, 3, 4, or 5 amino acid substitutions. In some embodiments, the CDR-L2 is a CDR-L2 of a VL domain of any one of SEQ ID NOs: 37-45, 402-438, and 505-518, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some embodiments, the CDR-L3 is a CDR-L3 of a VL domain of any one of SEQ ID NOs: 37-45, 402-438, and 505-518, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid71IPTS / 200090251.1Goodwin Ref: PRG-062WO substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0248] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises one to three CDRs of a VH domain selected from any one of SEQ ID NOs: 32- 36 and 452 and one to three CDRs of a VL domain selected from any one of SEQ ID NOs: 37- 45, 402-438, and 505-518. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises two to three CDRs of a VH domain selected from any one of SEQ ID NOs: 32-36 and 452 and two to three CDRs of a VL domain selected from any one of SEQ ID NOs: 37-45, 402-438, and 505-518. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises three CDRs of a VH domain selected from any one of SEQ ID NOs: 32-36 and 452 and three CDRs of a VL domain selected from any one of SEQ ID NOs: 37-45, 402-438, and 505-518. In some aspects, the CDRs are Kabat CDRs. In some aspects, the CDRs are Chothia CDRs. In some aspects, the CDRs are IMGT CDRs. In some aspects, the CDRs are AbM CDRs. In some aspects, the CDRs are Contact CDRs.

[0249] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H3 selected from any one of SEQ ID NOs: 13-18. In some aspects, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 selected from any one of SEQ ID NOs: 13-18. In some embodiments, the CDR-H3 is a CDR-H3 selected from any one of SEQ ID NOs: 13-18, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0250] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 selected from any one of SEQ ID NOs: 1-9. In some aspects, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99%72IPTS / 200090251.1Goodwin Ref: PRG-062WO identity to a CDR-H1 selected from any one of SEQ ID NOs: 1-9. In some embodiments, the CDR-H1 is a CDR-H1 selected from any one of SEQ ID NO: 1-9, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0251] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H2 selected from any one of SEQ ID NOs: 10-12. In some aspects, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 selected from any one of SEQ ID NOs: 10-12. In some embodiments, the CDR-H2 is a CDR-H2 selected from any one of SEQ ID NOs: 10-12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0252] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-L3 selected from any one of SEQ ID NOs: 27-31, 385-401, and 501- 504. In some aspects, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 selected from any one of SEQ ID NOs: 27-31, 385-401, and 501-504. In some embodiments, the CDR-L3 is a CDR-L3 selected from any one of SEQ ID NOs: 27-31, 385-401, and 501-504, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.73IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0253] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-L2 selected from any one of SEQ ID NOs: 25-26, 377-384, and the amino acid sequences DDS, DVS, EDS, DDT, DDK, DDL, and DDN. In some aspects, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 selected from any one of SEQ ID NOs: 25-26, 377-384, and the amino acid sequences DDS, DVS, EDS, DDT, DDK, DDL, and DDN. In some embodiments, the CDR-L2 is a CDR-L2 selected from any one of SEQ ID NOs: 25-26, 377-384, and the amino acid sequences DDS, DVS, EDS, DDT, DDK, DDL, and DDN, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0254] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-L1 selected from any one of SEQ ID NOs: 19-24, 345-376, and 533. In some aspects, the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 selected from any one of SEQ ID NOs: 19-24, 345-376, and 533. In some embodiments, the CDR-L1 is a CDR-L1 selected from any one of SEQ ID NOs: 19-24, 345-376, and 533, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0255] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H3 selected from any one of SEQ ID NOs: 13-18, a CDR-H2 selected from any one of SEQ ID NOs: 10-12, a CDR-H1 selected from any one of SEQ ID NOs: 1-9, a CDR-L3 selected from any one of SEQ ID NOs: 27-31, 385-401, and 501-504, a CDR-L2 selected from any one of SEQ ID NOs: 25-26, 377-384, and the amino acid sequences DDS, DVS, EDS, DDT, DDK, DDL, and DDN, and a CDR-L1 selected from any one of SEQ ID NOs: 74IPTS / 200090251.1Goodwin Ref: PRG-062WO19-24, 345-376, and 533. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 selected from any one of SEQ ID NOs: 13-18, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 selected from any one of SEQ ID NOs: 10- 12, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 selected from any one of SEQ ID NOs: 1-9, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 selected from any one of SEQ ID NOs: 27-31, 385-401, and 501-504, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 selected from any one of SEQ ID NOs: 25-26, 377-384, and the amino acid sequences DDS, DVS, EDS, DDT, DDK, DDL, and DDN, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 selected from any one of SEQ ID NOs: 19-24, 345-376, and 533. In some embodiments, the CDR-H3 is a CDR-H3 selected from any one of SEQ ID NOs: 13-18, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 selected from any one of SEQ ID NOs: 10-12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 selected from any one of SEQ ID NOs: 1-9, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 selected from any one of SEQ ID NOs: 27-31, 385-401, and 501-504, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 selected from any one of SEQ ID NOs: 25-26, 377-384, and the amino acid sequences DDS, DVS, EDS, DDT, DDK, DDL, and DDN, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 selected from any one of SEQ ID NOs: 19-24, 345-376, and 533, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0256] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CORED selected from any one of SEQ ID NOs: 13 and 16, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 selected from any one of SEQ ID NOs: 10, 11, and 12, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 75IPTS / 200090251.1Goodwin Ref: PRG-062WO94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 selected from any one of SEQ ID NOs: 3, 6, and 9, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 of SEQ ID NO: 27, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 selected from SEQ ID NO: 26 and the amino acid sequence DDS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 selected from any one of SEQ ID NOs: 21 and 24. In some embodiments, the CDR-H3 is a CDR-H3 selected from any one of SEQ ID NOs: 13 and 16, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 selected from any one of SEQ ID NOs: 10, 11, and 12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 selected from any one of SEQ ID NOs: 3, 6, and 9, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in SEQ ID NO: 27 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 selected from SEQ ID NO: 26 and the amino acid sequence DDS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 selected from any one of SEQ ID NOs: 21 and 24, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0257] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27.

[0258] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CORED set forth in any one of SEQ ID NOs: 13 and 16, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in any one of SEQ ID NOs: 10, 11, and 12, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%,76IPTS / 200090251.1Goodwin Ref: PRG-062WO94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in any one of SEQ ID NOs: 3, 6, and 9, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in SEQ ID NO: 30, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in SEQ ID NO: 25 or the amino acid sequence DVS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 set forth in any one of SEQ ID NOs: 19 and 22. In some embodiments, the CDR-H3 is a CDR-H3 set forth in any one of SEQ ID NOs: 13 and 16, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 set forth in any one of SEQ ID NOs: 10, 11, and 12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 set forth in any one of SEQ ID NOs: 3, 6, and 9, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in SEQ ID NO: 30 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in SEQ ID NO: 25 or the amino acid sequence DVS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in any one of SEQ ID NOs: 19 and 22, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0259] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30.

[0260] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 set forth in any one of SEQ ID NOs: 13 and 16, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in any one of SEQ ID NOs: 10, 11, and 12, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in any one 77IPTS / 200090251.1Goodwin Ref: PRG-062WO of SEQ ID NOs: 3, 6, and 9, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in SEQ ID NO: 392, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in SEQ ID NO: 26 or the amino acid sequence DDS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR- L1 set forth in any one of SEQ ID NOs: 351 and 365. In some embodiments, the CDR-H3 is a CDR-H3 set forth in any one of SEQ ID NOs: 13 and 16, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 set forth in any one of SEQ ID NOs: 10, 11, and 12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 set forth in any one of SEQ ID NOs: 3, 6, and 9, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in SEQ ID NO: 392 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in SEQ ID NO: 26 or the amino acid sequence DDS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in any one of SEQ ID NOs: 351 and 365, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0261] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392.

[0262] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 set forth in any one of SEQ ID NOs: 13 and 16, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in any one of SEQ ID NOs: 10, 11, and 12, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in any one of SEQ ID NOs: 3, 6, and 9, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%,78IPTS / 200090251.1Goodwin Ref: PRG-062WO95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in SEQ ID NO: 396, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in SEQ ID NO: 26 or the amino acid sequence DDS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR- L1 set forth in any one of SEQ ID NOs: 356 and 372. In some embodiments, the CDR-H3 is a CDR-H3 set forth in any one of SEQ ID NOs: 13 and 16, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 set forth in any one of SEQ ID NOs: 10, 11, and 12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 set forth in any one of SEQ ID NOs: 3, 6, and 9, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in SEQ ID NO: 396, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in SEQ ID NO: 26 or the amino acid sequence DDS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in any one of SEQ ID NOs: 356 and 372, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0263] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396.

[0264] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 1, 4, and 7, a CDR-H2 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 10, 11, and 12, a CDR-H3 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 13 and 16, a CDR-L1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 19 and 22, a CDR-L2 comprising an amino acid sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS, and a CDR-L3 comprising an amino acid sequence set forth in SEQ ID NO: 27.

[0265] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 2, 5, and 8, a CDR-H2 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 10, 11, and 12, a CDR-H3 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 13 and 16, a CDR-L1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 19 and 22, a CDR-L2 comprising an amino acid sequence set forth in SEQ ID NO: 25 79IPTS / 200090251.1Goodwin Ref: PRG-062WO or the amino acid sequence DVS, and a CDR-L3 comprising an amino acid sequence set forth in SEQ ID NO: 28.

[0266] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 2, 5, and 8, a CDR-H2 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 10, 11, and 12, a CDR-H3 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 14 and 17, a CDR-L1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 20 and 23, a CDR-L2 comprising an amino acid sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS, and a CDR-L3 comprising an amino acid sequence set forth in SEQ ID NO: 28.

[0267] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 2, 5, and 8, a CDR-H2 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 10, 11, and 12, a CDR-H3 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 13 and 16, a CDR-L1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 21 and 24, a CDR-L2 comprising an amino acid sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS, and a CDR-L3 comprising an amino acid sequence set forth in SEQ ID NO: 28.

[0268] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 3, 6, and 9, a CDR-H2 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 10, 11, and 12, a CDR-H3 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 15 and 18, a CDR-L1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 21 and 24, a CDR-L2 comprising an amino acid sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS, and a CDR-L3 comprising an amino acid sequence set forth in SEQ ID NO: 29.

[0269] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 1, 4, and 7, a CDR-H2 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 10, 11, and 12, a CDR-H3 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 13 and 16, a CDR-L1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 19 and 22, a CDR-L2 comprising an amino acid sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS, and a CDR-L3 comprising an amino acid sequence set forth in SEQ ID NO: 31.80IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0270] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 2, 5, and 8, a CDR-H2 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 10, 11, and 12, a CDR-H3 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 15 and 18, a CDR-L1 comprising an amino acid sequence set forth in any one of SEQ ID NOs: 21 and 24, a CDR-L2 comprising an amino acid sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS, and a CDR-L3 comprising an amino acid sequence set forth in SEQ ID NO: 28.

[0271] In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 of TABLE 3; the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR- H2 of TABLE 3, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 of TABLE 3, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 of TABLE 3, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 of TABLE 3, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 of TABLE 3. In some embodiments, the CDR-H3 is a CDR-H3 of TABLE 3, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 of TABLE 3, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 of TABLE 3, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 of TABLE 3 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 of TABLE 3, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 of TABLE 3, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0272] In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 of TABLE 12; the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR- H2 of TABLE 12, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 of TABLE 12, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 of TABLE 12, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 of TABLE 12, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 of TABLE 12. In some embodiments, the CDR-H3 is a CDR-H3 of TABLE 12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino 81IPTS / 200090251.1Goodwin Ref: PRG-062WO acid substitutions; the CDR-H2 is a CDR-H2 of TABLE 12, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 of TABLE 12, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 of TABLE 12 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 of TABLE 12, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 of TABLE 12, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0273] In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any one of SEQ ID NOs: 47-270. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 453. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody comprises a heavy chain comprising a human IgG sequence selected from SEQ ID NO: 61 or SEQ ID NO: 173 and a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 453. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 173 and a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 453.

[0274] In some embodiments, the antibody, or antigen binding fragment thereof, comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27. In certain embodiments, the antibody, or antigen binding fragment thereof, further comprises a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a heavy chain constant region selected from SEQ ID NO: 61 or SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a heavy chain constant region set forth in SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a human lambda light chain constant region (e.g., a lambda light chain constant region of subtype 1, 2, 3, or 7, such as a lambda light chain constant region set forth in any one of SEQ ID NOs: 453-456). In some embodiments, the antibody, or antigen82IPTS / 200090251.1Goodwin Ref: PRG-062WO binding fragment thereof, comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 453.

[0275] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30. In certain embodiments, the antibody, or antigen binding fragment thereof, further comprises a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a heavy chain constant region selected from SEQ ID NO: 61 or SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a heavy chain constant region set forth in SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a human lambda light chain constant region (e.g., a lambda light chain constant region of subtype 1, 2, 3, or 7, such as a lambda light chain constant region set forth in any one of SEQ ID NOs: 453-456). In some embodiments, the antibody, or antigen binding fragment thereof, comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 453.

[0276] Although a C-terminal lysine may be present in the corresponding coding sequence of the constant heavy chain region (e.g., in a sequence encoding any one of SEQ ID NOs: 159- 270), it may be cleaved off during manufacture or after administration (resulting in, e.g., a constant heavy chain sequence of any one of SEQ ID NOs: 40-158). Accordingly, any of the antibodies or antigen binding fragments thereof described above may comprise a human IgG sequence containing a C-terminal lysine (e.g., any one of SEQ ID NOs: 159-270), a human IgG sequence lacking a C-terminal lysine (e.g., any one of SEQ ID NOs: 40-158), or a mixture thereof (e.g., a mixture of the same heavy chain constant sequence with and without a C-terminal lysine, such as a mixture of SEQ ID NO: 173 and SEQ ID NO: 61).

[0277] In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this disclosure are referred to herein as “variants” or “clones”. In some embodiments, such variants or clones are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some83IPTS / 200090251.1Goodwin Ref: PRG-062WO embodiments, such variants or clones are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.Anti-OX40L Antibodies

[0278] The present application provides antibodies or antigen binding fragments thereof and compositions comprising an antibody, or an antigen binding fragment thereof, which binds OX40L. In some embodiments, an anti-OX40L antibody, or antigen binding fragment thereof, described herein is selected from amlitelimab and oxelumab. In some embodiments, amlitelimab comprises a variable heavy (VH) chain sequence having the amino acid sequence of SEQ ID NO: 448 and a variable light (VL) chain sequence having the amino acid sequence of SEQ ID NO: 449. In some embodiments, oxelumab comprises a VH chain sequence having the amino acid sequence of SEQ ID NO: 481 and a VL chain sequence having the amino acid sequence of SEQ ID NO: 482. In some embodiments, amlitelimab comprises a heavy chain having the amino acid sequence of SEQ ID NO: 483 and a light chain sequence having the amino acid sequence of SEQ ID NO: 484. In some embodiments, oxelumab comprises a heavy chain having the amino acid sequence of SEQ ID NO: 450 and a light chain sequence having the amino acid sequence of SEQ ID NO: 451, or a VH and / or VL therein. See also PCT Application No.PCT / US2024 / 026854 (corresponding to PCT Publication No. WO2024227174), which is incorporated herein by reference in its entirety. In some embodiments, an anti-OX40L antibody, or antigen binding fragment thereof, described herein is selected from an anti-OX40L antibody described therein.

[0279] Sequences of exemplary anti-OX40L antibodies, or antigen binding fragments thereof, are provided in TABLE 5.TABLE 5. Sequences of OX40L antibody constructs - VH, VL, and associated CDRs84IPTS / 200090251.1Goodwin Ref: PRG-062WO85IPTS / 200090251.1Goodwin Ref: PRG-062WO86IPTS / 200090251.1Goodwin Ref: PRG-062WOAnti-OX40L VH Domains

[0280] In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence selected from any one of SEQ ID NOs: 335-338.

[0281] In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in any one of SEQ ID NOs: 335- 338. In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence provided in any one of SEQ ID NOs: 335-338, with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.Anti-OX40L VL Domains

[0282] In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VL sequence selected from any one of SEQ ID NOs: 339-342.

[0283] In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in any one of SEQ ID NOs: 339- 342. In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VL sequence provided in any one of SEQ ID NOs: 339-342, with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.87IPTS / 200090251.1Goodwin Ref: PRG-062WOAnti-OX40L VH-VL Combinations

[0284] In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence selected from any one of SEQ ID NOs: 335-338; and a VL sequence selected from any one of SEQ ID NO: 339-342.

[0285] In certain aspects, any one of SEQ ID NOs: 335-338 can be combined with any one of SEQ ID NOs: 339-342.

[0286] In certain aspects, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence of a construct provided in TABLE 5 (e.g., a VH sequence and a VL sequence from the same row of TABLE 5) or in PCT Application No. PCT / US2024 / 026854 (corresponding to PCT Publication No. WO2024227174), incorporated by reference herein in its entirety. In certain aspects, an antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence from Table 2 in PCT Application No. PCT / US2024 / 026854 (e.g., a VH sequence and a VL sequence from the same row of Table 2).

[0287] In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in any one of SEQ ID NOs: 335- 338; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in any one of SEQ ID NOs: 339-342. In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence provided in any one of SEQ ID NOs: 335-338, with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions, and a VL sequence provided in any one of SEQ ID NOs: 339-342, with up to 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0288] In certain embodiments, the antibody, or an antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 335 and a VL sequence set forth in SEQ ID NO: 339.88IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0289] In certain embodiments, the antibody, or an antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 336 and a VL sequence set forth in SEQ ID NO: 340.

[0290] In certain embodiments, the antibody, or an antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 337 and a VL sequence set forth in SEQ ID NO: 341.

[0291] In certain embodiments, the antibody, or an antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 338 and a VL sequence set forth in SEQ ID NO: 342.

[0292] In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 173.

[0293] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 335; and a VL sequence set forth in SEQ ID NO: 339; and the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 173. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0294] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 335, a VL sequence set forth in SEQ ID NO: 339, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 335, a VL sequence set forth in SEQ ID NO: 339, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%,89IPTS / 200090251.1Goodwin Ref: PRG-062WO95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 335; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 339, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 335; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 339, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 46.

[0295] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 335, a VL sequence set forth in SEQ ID NO: 339, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46. In some embodiments, the antibody comprises a heavy chain sequence set forth in SEQ ID NO: 478 or 479 and a light chain sequence set forth in SEQ ID NO: 480. In some embodiments, the antibody comprises a heavy chain sequence set forth in SEQ ID NO: 478 and a light chain sequence set forth in SEQ ID NO: 480. The heavy chain sequence of SEQ ID NO: 478 contains a C-terminal lysine, which may be cleaved off during manufacture or after administration, resulting in an antibody containing the heavy chain sequence of SEQ ID NO: 479. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 336; and a VL sequence set forth in SEQ ID NO: 340; and the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 173. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.90IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0296] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 336, a VL sequence set forth in SEQ ID NO: 340, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 336, a VL sequence set forth in SEQ ID NO: 340, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 336; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 340, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 336; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 340, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 46.

[0297] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 336, a VL sequence set forth in SEQ ID NO: 340, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46.

[0298] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 337; and a VL sequence set forth in SEQ ID NO: 341; and the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 173. In certain embodiments of any of the antibodies, or antigen91IPTS / 200090251.1Goodwin Ref: PRG-062WO binding fragments thereof, described above, the antibody further comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0299] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 337, a VL sequence set forth in SEQ ID NO: 341, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 337, a VL sequence set forth in SEQ ID NO: 341, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 337; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 341, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 337; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 341, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 46.

[0300] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 337, a VL sequence set forth in SEQ ID NO: 341, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46.

[0301] In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 338; and a VL sequence set forth in SEQ ID NO: 342; and the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270. In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173. In certain embodiments, the antibody, or92IPTS / 200090251.1Goodwin Ref: PRG-062WO antigen binding fragment thereof, comprises a heavy chain comprising a human IgG sequence set forth in SEQ ID NO: 173. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0302] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 338, a VL sequence set forth in SEQ ID NO: 342, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 338, a VL sequence set forth in SEQ ID NO: 342, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 338; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 342, a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions, and a human kappa light chain constant region. In certain embodiments, the antibody comprises a VH sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VH sequence provided in SEQ ID NO: 338; and a VL sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a VL sequence provided in SEQ ID NO: 342, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 61 or SEQ ID NO: 173 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 61 or SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46 or a sequence having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to SEQ ID NO: 46.

[0303] In certain embodiments, the antibody comprises a VH sequence set forth in SEQ ID NO: 338, a VL sequence set forth in SEQ ID NO: 342, a heavy chain constant region comprising a sequence set forth in SEQ ID NO: 173, and a light chain constant region comprising a sequence set forth in SEQ ID NO: 46.

[0304] Although a C-terminal lysine may be present in the corresponding coding sequence of the constant heavy chain region (e.g., in a sequence encoding any one of SEQ ID NOs: 159- 270), it may be cleaved off during manufacture or after administration (resulting in, e.g., a constant heavy chain sequence of any one of SEQ ID NOs: 40-158). Accordingly, any of the93IPTS / 200090251.1Goodwin Ref: PRG-062WO antibodies or antigen binding fragments thereof described above may comprise a human IgG sequence containing a C-terminal lysine (e.g., any one of SEQ ID NOs: 159-270), a human IgG sequence lacking a C-terminal lysine (e.g., any one of SEQ ID NOs: 40-158), or a mixture thereof (e.g., a mixture of the same heavy chain constant region sequence with and without a C- terminal lysine, such as a mixture of SEQ ID NO: 173 and SEQ ID NO: 61).Anti-OX40L CDRs

[0305] In some embodiments, disclosed herein is an antibody, or antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the CDRs of TABLE 5. In some embodiments, disclosed herein is an antibody, or antigen binding fragment thereof, comprising 6 of the Kabat CDRs of TABLE 5, 6 of the Chothia CDRs of TABLE 5, or 6 of the IMGT CDRs of TABLE 5. In some embodiments, the antibody, or an antigen binding fragment thereof, comprises 6 of the Kabat CDRs, 6 of the Chothia CDRs, or 6 of the IMGT CDRs from a single row of TABLE 5 (e.g., 6 CDRs from the same antibody).

[0306] In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the CDRs of an antibody provided in PCT Application No. PCT / US2024 / 026854 (corresponding to PCT Publication No. WO2024227174, incorporated by reference herein in its entirety, such as 1, 2, 3, 4, 5, or 6 of the CDRs in Table 2 in PCT Application No. PCT / US2024 / 026854. In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the Kabat CDRs of an antibody, or an antigen binding fragment thereof, provided in PCT Application No. PCT / US2024 / 026854. In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the Chothia CDRs of an antibody, or an antigen binding fragment thereof, provided in PCT Application No. PCT / US2024 / 026854. In some embodiments, disclosed herein is an antibody, or an antigen binding fragment thereof, comprising 1, 2, 3, 4, 5, or 6 of the IMGT CDRs of an antibody provided in PCT Application No. PCT / US2024 / 026854. In some embodiments, the antibody, or an antigen binding fragment thereof, comprises 6 of the Kabat CDRs, 6 of the Chothia CDRs, or 6 of the IMGT CDRs from a single row of Table 2 in in PCT Application No. PCT / US2024 / 026854 (e.g., 6 CDRs from the same antibody).

[0307] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises one to three CDRs of a VH domain selected from any one of SEQ ID NOs: 335-338. In some embodiments, an antibody, or antigen binding fragment thereof, provided94IPTS / 200090251.1Goodwin Ref: PRG-062WO herein comprises two to three CDRs of a VH domain selected from any one of SEQ ID NOs: 335-338. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises three CDRs of a VH domain selected from any one of SEQ ID NOs: 335-338. In some aspects, the CDRs are Kabat CDRs. In some aspects, the CDRs are Chothia CDRs. In some aspects, the CDRs are IMGT CDRs. In some aspects, the CDRs are AbM CDRs. In some aspects, the CDRs are Contact CDRs.

[0308] In some embodiments, the CDRs are CDRs having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% identity to a CDR-H1, CDR-H2, or CDR- H3 selected from SEQ ID NOs: 273-308. In some embodiments, the CDR-H1 is a CDR-H1 of a VH domain selected from any one of SEQ ID NOs: 335-338, with up to 1, 2, 3, 4, or 5 amino acid substitutions. In some embodiments, the CDR-H2 is a CDR-H2 of a VH domain selected from any one of SEQ ID NOs: 335-338, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some embodiments, the CDR-H3 is a CDR-H3 of a VH domain selected from any one of SEQ ID NOs: 335-338, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0309] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises one to three CDRs of a VL domain selected from any one of SEQ ID NOs: 339-342. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises two to three CDRs of a VL domain selected from any one of SEQ ID NOs: 339-342. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises three CDRs of a VL domain selected from any one of SEQ ID NOs: 339-342. In some aspects, the CDRs are Kabat CDRs. In some aspects, the CDRs are Chothia CDRs. In some aspects, the CDRs are IMGT CDRs. In some aspects, the CDRs are AbM CDRs. In some aspects, the CDRs are Contact CDRs.

[0310] In some embodiments, the CDRs are CDRs having at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 100% identity to a CDR-L1, CDR-L2, or CDR- L3 selected from SEQ ID NOs: 309-319, 321, 323, 325, 327-334, 343, and 344 or any one of the amino acid sequences ASS, GAT, DAS, and ATS. In some embodiments, the CDR-L1 is a95IPTS / 200090251.1Goodwin Ref: PRG-062WOCDR-L1 of a VL domain selected from any one of SEQ ID NOs: 339-342, with up to 1, 2, 3, 4, or 5 amino acid substitutions. In some embodiments, the CDR-L2 is a CDR-L2 of a VL domain selected from any one of SEQ ID NOs: 339-342, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some embodiments, the CDR-L3 is a CDR-L3 of a VL domain selected from any one of SEQ ID NOs: 339-342, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0311] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises one to three CDRs of a VH domain selected from any one of SEQ ID NOs: 335-338 and one to three CDRs of a VL domain selected from any one of SEQ ID NO: 339-342. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises two to three CDRs of a VH domain selected from any one of SEQ ID NOs: 335-338 and two to three CDRs of a VL domain selected from any one of SEQ ID NOs: 339-342. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises three CDRs of a VH domain selected from any one of SEQ ID NOs: 335-338 and three CDRs of a VL domain selected from any one of SEQ ID NOs: 339-342. In some aspects, the CDRs are Kabat CDRs. In some aspects, the CDRs are Chothia CDRs. In some aspects, the CDRs are IMGT CDRs. In some aspects, the CDRs are AbM CDRs. In some aspects, the CDRs are Contact CDRs.

[0312] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H3 selected from any one of SEQ ID NOs: 297-308. In some aspects, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 selected from any one of SEQ ID NOs: 297-308. In some embodiments, the CDR-H3 is a CDR-H3 selected from any one of SEQ ID NOs: 297-308, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some96IPTS / 200090251.1Goodwin Ref: PRG-062WO embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0313] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 selected from any one of SEQ ID NOs: 273-284. In some aspects, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 selected from any one of SEQ ID NOs: 273-284. In some embodiments, the CDR-H1 is a CDR-H1 selected from any one of SEQ ID NOs: 273-284, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0314] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H2 selected from any one of SEQ ID NOs: 285-296. In some aspects, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 selected from any one of SEQ ID NOs: 285-296. In some embodiments, the CDR-H2 is a CDR-H2 selected from any one of SEQ ID NOs: 285-296, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0315] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-L3 selected from any one of SEQ ID NOs: 327-334. In some aspects, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 of any one of SEQ ID NOs: 327-334. In some embodiments, the CDR-L3 selected from any one of SEQ ID NOs: 327-334, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided 97IPTS / 200090251.1Goodwin Ref: PRG-062WO herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0316] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-L2 selected from any one of SEQ ID NOs: 319, 321, 323, 325, or the amino acid sequence ASS, GAT, DAS, or ATS. In some aspects, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 selected from any one of SEQ ID NOs: 319, 321, 323, 325, or the amino acid sequence ASS, GAT, DAS, or ATS. In some embodiments, the CDR-L2 is a CDR-L2 selected from any one of SEQ ID NOs: 319, 321, 323, 325, or the amino acid sequence ASS, GAT, DAS, or ATS, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0317] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-L1 selected from any one of SEQ ID NOs: 309-318, 343, and 344. In some aspects, the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 selected from any one of SEQ ID NOs: 309-318, 343, and 344. In some embodiments, the CDR-L1 is a CDR-L1 selected from any one of SEQ ID NOs: 309-318, 343, and 344, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions. In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this paragraph are referred to herein as “variants.” In some embodiments, such variants are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies.

[0318] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H3 selected from any one of SEQ ID NOs: 297-308, a CDR-H2 selected from any one of SEQ ID NOs: 285-296, a CDR-H1 selected from any one of SEQ ID 98IPTS / 200090251.1Goodwin Ref: PRG-062WONOs: 273-284, a CDR-L3 selected from any one of SEQ ID NOs: 327-334, a CDR-L2 selected from any one of SEQ ID NOs: 319, 321, 323, 325, or the amino acid sequence ASS, GAT, DAS, or ATS, and a CDR-L1 selected from any one of SEQ ID NOs: 309-318, 343, and 344. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 selected from any one of SEQ ID NOs: 297-308, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 selected from any one of SEQ ID NOs: 285-296, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 selected from any one of SEQ ID NOs: 273-284, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 selected from any one of SEQ ID NOs: 327-334, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 selected from any one of SEQ ID NOs: 319, 321, 323, 325, or the amino acid sequence ASS, GAT, DAS, or ATS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 selected from any one of SEQ ID NOs: 309-318, 343, and 344. In some embodiments, the CDR- H3 is a CDR-H3 selected from any one of SEQ ID NOs: 297-308, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 selected from any one of SEQ ID NOs: 285-296, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR-H1 selected from any one of SEQ ID NOs: 273-284, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 selected from any one of SEQ ID NOs: 327-334, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 selected from any one of SEQ ID NOs: 319, 321, 323, 325, or the amino acid sequence ASS, GAT, DAS, or ATS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 selected from any one of SEQ ID NOs: 309-318, 343, and 344, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0319] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 set forth in any one of SEQ ID NOs: 297, 298, and 299, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 99IPTS / 200090251.1Goodwin Ref: PRG-062WO96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in any one of SEQ ID NOs: 285, 286, and 287, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in any one of SEQ ID NOs: 273, 274, and 275, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in any one of SEQ ID NOs: 327 and 328, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in SEQ ID NO: 319 or the amino acid sequence ASS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 set forth in any one of SEQ ID NOs: 309, 310, and 311. In some embodiments, the CDR-H3 is a CORED set forth in any one of SEQ ID NOs: 297, 298, and 299, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 set forth in any one of SEQ ID NOs: 285, 286, and 287, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR- H1 set forth in any one of SEQ ID NOs: 273, 274, and 275, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in any one of SEQ ID NO: 327 or 328, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in SEQ ID NO: 319 or the amino acid sequence ASS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in any one of SEQ ID NOs: 309, 310, and 311, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0320] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

[0321] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 100IPTS / 200090251.1Goodwin Ref: PRG-062WO93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 set forth in any one of SEQ ID NOs: 300, 301, and 302, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in any one of SEQ ID NOs: 288, 289, and 290, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in any one of SEQ ID NOs: 276, 277, and 278, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in any one of SEQ ID NOs: 329 and 330, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in SEQ ID NO: 321 or the amino acid sequence GAT, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 set forth in any one of SEQ ID NOs: 312, 313, and 343. In some embodiments, the CDR-H3 is a CORED set forth in any one of SEQ ID NOs: 300, 301, and 302, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 set forth in any one of SEQ ID NOs: 288, 289, and 290, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR- H1 set forth in any one of SEQ ID NOs: 276, 277, and 278, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in any one of SEQ ID NOs: 329 and 330 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in SEQ ID NO: 321 or the amino acid sequence GAT, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in any one of SEQ ID NOs: 312, 313, and 343, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0322] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330.

[0323] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino101IPTS / 200090251.1Goodwin Ref: PRG-062WO acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 set forth in any one of SEQ ID NOs: 303, 304, and 305, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in any one of SEQ ID NOs: 291, 292, and 293, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in any one of SEQ ID NOs: 279, 280, and 281, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in any one of SEQ ID NOs: 331 and 332, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in SEQ ID NO: 323 or the amino acid sequence DAS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 set forth in any one of SEQ ID NOs: 344, 314, and 315. In some embodiments, the CDR-H3 is a CORED set forth in any one of SEQ ID NOs: 303, 304, and 305, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 set forth in any one of SEQ ID NOs: 291, 292, and 293, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR- H1 set forth in any one of SEQ ID NOs: 279, 280, and 281, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in any one of SEQ ID NOs: 331 and 332 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in SEQ ID NO: 323 or the amino acid sequence DAS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in any one of SEQ ID NOs: 344, 314, and 315, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0324] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

[0325] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306,102IPTS / 200090251.1Goodwin Ref: PRG-062WO307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334. In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 set forth in any of SEQ ID NOs: 306, 307, and 308, the CDR-H2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in any one of SEQ ID NOs: 294, 295, and 296, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in any one of SEQ ID NOs: 282, 283, and 284, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in any one of SEQ ID NOs: 333 and 334, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in SEQ ID NO: 325 or the amino acid sequence ATS, and the CDR-L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 set forth in any one of SEQ ID NOs: 316, 317, and 318. In some embodiments, the CDR-H3 is a CORED set forth in any one of SEQ ID NOs: 306, 307, and 308, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR-H2 set forth in any one of SEQ ID NOs: 294, 295, and 296, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H1 is a CDR- H1 set forth in any one of SEQ ID NOs: 282, 283, and 284, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in any one of SEQ ID NOs: 333 and 334 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in SEQ ID NO: 325 or the amino acid sequence ATS, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in any one of SEQ ID NOs: 316, 317, and 318, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0326] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NO: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

[0327] In some embodiments, the CDR-H3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H3 set forth in TABLE 5; the CDR-H2 103IPTS / 200090251.1Goodwin Ref: PRG-062WO has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H2 set forth in TABLE 5, the CDR-H1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-H1 set forth in TABLE 5, the CDR-L3 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L3 set forth in TABLE 5, the CDR-L2 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L2 set forth in TABLE 5, and the CDR- L1 has at least about 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% identity to a CDR-L1 set forth in TABLE 5. In some embodiments, the CDR-H3 is a CDR-H3 set forth in TABLE 5, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR-H2 is a CDR- H2 set forth in TABLE 5, with up to 1, 2, 3, 4, 5, 6, 7, or 8 amino acid substitutions; the CDR- H1 is a CDR-H1 set forth in TABLE 5, with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L3 is a CDR-L3 set forth in TABLE 5 with up to 1, 2, 3, 4, or 5 amino acid substitutions; the CDR-L2 is a CDR-L2 set forth in TABLE 5, with up to 1, 2, 3, or 4 amino acid substitutions; and the CDR-L1 is a CDR-L1 set forth in TABLE 5, with up to 1, 2, 3, 4, 5, or 6 amino acid substitutions.

[0328] In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a heavy chain comprising a human IgG sequence selected from a sequence set forth in any one of SEQ ID NOs: 47-270. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46. In certain embodiments of any of the antibodies, or antigen binding fragments thereof, described above, the antibody further comprises a heavy chain comprising a human IgG sequence selected from SEQ ID NO: 61 or SEQ ID NO: 173 and a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0329] In some embodiments, the antibody, or antigen binding fragment thereof, comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328. In certain embodiments, the antibody further comprises a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region selected from SEQ 104IPTS / 200090251.1Goodwin Ref: PRG-062WOID NO: 61 and SEQ ID NO: 173. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region set forth in SEQ ID NO: 173. In certain embodiments, the antibody comprises a human kappa light chain constant region. In some embodiments, the antibody comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0330] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312,313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330. In certain embodiments, the antibody further comprises a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region selected from SEQ ID NO: 61 and SEQ ID NO: 173. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region set forth in SEQ ID NO: 173. In certain embodiments, the antibody comprises a human kappa light chain constant region. In some embodiments, the antibody comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0331] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344,314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332. In certain embodiments, the antibody further comprises a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region selected from SEQ ID NO: 61 and SEQ ID NO: 173. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region set forth in SEQ ID NO: 173. In certain embodiments, the antibody comprises a human kappa light chain constant region. In105IPTS / 200090251.1Goodwin Ref: PRG-062WO some embodiments, the antibody comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0332] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein comprises a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334. In certain embodiments, the antibody further comprises a heavy chain constant region (e.g., an IgGl constant region) comprising LALA / YTE substitutions. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region selected from SEQ ID NO: 61 and SEQ ID NO: 173. In certain embodiments, the antibody comprises a heavy chain comprising a heavy chain constant region set forth in SEQ ID NO: 173. In certain embodiments, the antibody comprises a human kappa light chain constant region. In some embodiments, the antibody comprises a constant light chain sequence comprising a sequence set forth in SEQ ID NO: 46.

[0333] Although a C-terminal lysine may be present in the corresponding coding sequence of the constant heavy chain region (e.g., in a sequence encoding any one of SEQ ID NOs: 159- 270), it may be cleaved off during manufacture or after administration (resulting in, e.g., a constant heavy chain sequence of any one of SEQ ID NOs: 40-158). Accordingly, any of the antibodies or antigen binding fragments thereof described above may comprise a human IgG sequence containing a C-terminal lysine (e.g, any one of SEQ ID NOs: 159-270), a human IgG sequence lacking a C-terminal lysine (e.g, any one of SEQ ID NOs: 40-158), or a mixture thereof (e.g., a mixture of the same heavy chain constant region sequence with and without a C- terminal lysine, such as a mixture of SEQ ID NO: 173 and SEQ ID NO: 61).

[0334] In some aspects, the amino acid substitutions are conservative amino acid substitutions. In some embodiments, the antibodies described in this disclosure are referred to herein as “variants” or “clones”. In some embodiments, such variants or clones are derived from a sequence provided herein, for example, by affinity maturation, site directed mutagenesis, random mutagenesis, or any other method known in the art or described herein. In some embodiments, such variants or clones are not derived from a sequence provided herein and may, for example, be isolated de novo according to the methods provided herein for obtaining antibodies106IPTS / 200090251.1Goodwin Ref: PRG-062WOFc Region

[0335] The structures of the Fc regions of various immunoglobulins, and the glycosylation sites contained therein, are known in the art. See Schroeder and Cavacini, J. (2010) Allergy Clin. Immunol. 125:S41-52, incorporated by reference in its entirety. The Fc region may be a naturally occurring Fc region, or an Fc region modified as described in the art or elsewhere in this disclosure.

[0336] Unless otherwise specified herein, numbering of amino acid residues in the Fc region or constant region is according to the EU numbering system, also called the EU index, as described in Kabat et al. , Sequences of Proteins of Immunological Interest, 5th Ed. Public Health Service, National Institutes of Health, Bethesda, MD, 1991. An “Fc polypeptide” of a dimeric Fc as used herein refers to one of the two polypeptides forming the dimeric Fc domain, i.e. a polypeptide comprising C-terminal constant regions of an immunoglobulin heavy chain, capable of stable self-association. For example, an Fc polypeptide of a dimeric IgG Fc comprises an IgG CH2 and an IgG CH3 constant domain sequence. An Fc can be of the class IgA, IgD, IgE, IgG, and IgM, and several of these may be further divided into subclasses (isotypes), e.g., IgGi, IgG2, IgGs, IgG4, IgAi, and IgA2.

[0337] The terms “Fc receptor” and “FcR” are used to describe a receptor that binds to the Fc region of an antibody. For example, an FcR can be a native sequence human FcR. Generally, an FcR is one which binds an IgG antibody (a gamma receptor) and includes receptors of the FcyRI, FcyRII, and FcyRIII subclasses, including allelic variants and alternatively spliced forms of these receptors. FcyRII receptors include FcyRIIA (an “activating receptor”) and FcyRIIB (an “inhibiting receptor”), which have similar amino acid sequences that differ primarily in the cytoplasmic domains thereof. Immunoglobulins of other isotypes can also be bound by certain FcRs (see, e.g., Janeway et al., Immuno Biology: the immune system in health and disease, (Elsevier Science Ltd., NY) (4th ed., 1999)). Activating receptor FcyRIIA contains an immunoreceptor tyrosine-based activation motif (ITAM) in its cytoplasmic domain. Inhibiting receptor FcyRIIB contains an immunoreceptor tyrosine-based inhibition motif (ITIM) in its cytoplasmic domain (reviewed in Daeron, Annu. Rev. Immunol. 15:203-234 (1997)). FcRs are reviewed in Ravetch and Kinet, Annu. Rev. Immunol 9:457-92 (1991); Capel et al., Immunomethods 4:25-34 (1994); and de Haas et al., J. Lab. Clin. Med. 126:330-41 (1995). Other FcRs, including those to be identified in the future, are encompassed by the term “FcR” herein. The term also includes the neonatal receptor, FcRn, which is responsible for the transfer of maternal IgGs to the fetus (Guyer et al., J. Immunol. 117:587 (1976); and Kim et al., J. Immunol. 24:249 (1994)).107IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0338] Modifications in the CH2 domain can affect the binding of FcRs to the Fc. A number of amino acid modifications in the Fc region are known that can selectively alter the affinity of the Fc for different Fcgamma receptors. In some aspects, the Fc comprises one or more modifications designed to promote selective binding of Fc-gamma receptors.

[0339] Exemplary mutations that may alter the binding of FcRs to the Fc are listed below (in EU numbering format):S298A / E333A / K334A, S298A / E333A / K334A / K326A (Lu Y, Vernes JM, Chiang N, et al., J Immunol Methods . 2011 Feb 28;365(l-2): 132-41);F243L / R292P / Y300L / V305I / P396L, F243L / R292P / Y300L / L235V / P396L (Stavenhagen JB, Gorlatov S, Tuaillon N, et al., Cancer Res. 2007 Sep 15;67(18):8882-90; Nordstrom JL, Gorlatov S, Zhang W, et al., Breast Cancer Res. 2011 Nov 30; 13(6):R123);F243L (Stewart R, Thom G, Levens M, et al., Protein Eng Des Sei. 2011 Sep;24(9):671-8.), S298A / E333A / K334A (Shields RL, Namenuk AK, Hong K, et al., J Biol Chem. 2001 Mar 2;276(9):6591-604);S239D / I332E / A330L, S239D / I332E (Lazar GA, Dang W, Karki S, et al., Proc Natl Acad Sci U SA. 2006 Mar 14; 103(11):4005-10);S239D / S267E, S267E / L328F (Chu SY, Vostiar I, Karki S, et al., Mol Immunol. 2008 Sep;45(15):3926-33);S239D / D265S / S298A / I332E, S239E / S298A / K326A / A327H, G237F / S298A / A330L / I332E, S23 9D / I332E / S298A, S239D / K326E / A330L / I332E / S298A, G236A / S239D / D270L / I332E, S239E / S 267E / H268D, L234F / S267E / N325L, G237F / V266L / S267D and other mutations listed in WO201 1 / 120134 and WO2011 / 120135, herein incorporated by reference. Therapeutic Antibody Engineering (by William R. Strohl and Lila M. Strohl, Woodhead Publishing series in Biomedicine No 11, ISBN 1 907568 37 9, Oct 2012) lists mutations on page 283.

[0340] In some embodiments, an antibody, or antigen binding fragment thereof, described herein includes modifications intended to improve its ability to mediate effector function.“Effector functions” refer to those biological activities mediated by the Fc region of an antibody, which activities may vary depending on the antibody isotype. Examples of antibody effector functions include receptor ligand blocking, agonism or antagonism, Clq binding to activate complement dependent cytotoxicity (CDC), Fc receptor binding to activate antibody-dependent cellular cytotoxicity (ADCC), and antibody dependent cellular phagocytosis (ADCP). In some embodiments, the anti-TSLP antibody and / or anti-OX40L antibody described herein includes modifications designed to improve its ability to mediate effector function. Such modifications that can have this effect are known in the art and include afucosylation, or engineering of the108IPTS / 200090251.1Goodwin Ref: PRG-062WO affinity of the Fc towards an activating receptor, mainly FCGR3a for ADCC, and towards Clq for CDC. The following TABLE 6 summarizes various designs reported in the literature for effector function engineering.

[0341] Methods of producing antibodies with little or no fucose on the Fc glycosylation site (Asn 297 EU numbering) without altering the amino acid sequence are well known in the art. The GlymaxX® technology (ProBioGen AG) is based on the introduction of a gene for an enzyme which deflects the cellular pathway of fucose biosynthesis into cells used for antibody production. This prevents the addition of the sugar “fucose” to the N-linked antibody carbohydrate part by antibody-producing cells (von Horsten et al. (2010) Glycobiology. 2010 Dec; 20 (12): 1607-18). Examples of cell lines capable of producing defucosylated antibody include CHO-DG44 with stable overexpression of the bacterial oxidoreductase GDP-6-deoxy-D- lyxo-4-hexylose reductase (RMD) (see von Horsten et al. (2010) supra) or Lecl3 CHO cells, which are deficient in protein fucosylation (see Ripka et al. (1986) Arch. Biochem. Biophys. 249:533-545; U.S. Pat. Pub. No. 2003 / 0157108; WO 2004 / 056312; each of which is incorporated by reference in its entirety), and knockout cell lines, such as alpha- 1,6- fucosyltransferase gene or FUT8 knockout CHO cells (see Yamane-Ohnuki et al. (2004) Biotech. Bioeng. 87: 614-622; Kanda c / a / . (2006) Biotechnol. Bioeng. 94:680-688; and WO 2003 / 085107; each of which is incorporated by reference in its entirety). Another approach to obtaining antibodies with lowered levels of fucosylation can be found in U.S. Patent No. 8,409,572, which teaches selecting cell lines for antibody production for their ability to yield lower levels of fucosylation on antibodies.

[0342] Antibodies can be fully afucosylated (meaning they contain no detectable fucose) or they can be partially afucosylated, meaning that the isolated antibody contains less than 95%, less than 85%, less than 75%, less than 65%, less than 55%, less than 45%, less than 35%, less than 25%, less than 15% or less than 5% of the amount of fucose normally detected for a similar antibody produced by a mammalian expression system.

[0343] In some aspects, the anti-OX40L and / or anti-TSLP antibody provided herein comprises an Fc domain (e.g., an IgGl domain) with reduced fucose content at position Asn 297 (EU numbering) compared to a naturally occurring Fc domain. Such Fc domains are known to have improved ADCC. See Shields et al., J. Biol. Chem., 2002, 277:26733-26740, incorporated by reference in its entirety. In some aspects, such antibodies do not comprise any fucose at position Asn 297. The amount of fucose may be determined using any suitable method, for example as described in WO 2008 / 077546, incorporated by reference in its entirety.109IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0344] In some embodiments, the anti-OX40L and / or anti-TSLP antibody described herein comprises an Fc region with one or more amino acid substitutions which improve ADCC, such as a substitution at one or more of positions 298, 333, and 334 of the Fc region. In some embodiments, the anti-OX40L and / or anti-TSLP antibody provided herein comprises an Fc region with one or more amino acid substitutions at positions 239, 332, and 330, as described in Lazar et al., Proc. Natl. Acad. Set. USA, 2006,103:4005-4010, incorporated by reference in its entirety.

[0345] Other illustrative glycosylation variants which may be incorporated into the antibodies provided herein are described, for example, in U.S. Pat. Pub. Nos. 2003 / 0157108, 2004 / 0093621, 2003 / 0157108, 2003 / 0115614, 2002 / 0164328, 2004 / 0093621, 2004 / 0132140, 2004 / 0110704, 2004 / 0110282, 2004 / 0109865; International Pat. Pub. Nos. 2000 / 61739, 2001 / 29246, 2003 / 085119, 2003 / 084570, 2005 / 035586, 2005 / 035778; 2005 / 053742, 2002 / 031140; Okazaki et al., J. Mol. BioL, 2004, 336: 1239-1249; and Yamane-Ohnuki et al., Biotech. Bioeng., 2004, 87: 614-622; each of which is incorporated by reference in its entirety.

[0346] In some embodiments, an antibody provided herein comprises an Fc region with at least one galactose residue in the oligosaccharide attached to the Fc region. Such antibody variants may have improved CDC function. Examples of such antibody variants are described, for example, in WO 1997 / 30087; WO 1998 / 58964; and WO 1999 / 22764; each of which is incorporated by reference in its entirety.

[0347] In some embodiments, the effector function of the anti-OX40L antibody, or antigen binding fragment thereof, described herein is antagonism and blocks OX40L binding to 0X40. In some embodiments, the effector function of the anti-TSLP antibody, or antigen binding fragment thereof, described herein is antagonism and blocks TSLP from binding to a TSLP receptor.

[0348] Thus, in one embodiment, an antibody described herein can include a dimeric Fc that comprises one or more amino acid modifications as noted in TABLE 6 that may confer improved effector function. In another embodiment, the antibody can be afucosylated to improve effector function.TABLE 6. CH2 domains and effector function engineering110IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0349] Fc modifications intended to reduce FcgR and / or complement binding and / or effector function are known in the art. Recent publications describe strategies that have been used to engineer antibodies with reduced or silenced effector activity (see Strohl, WR (2009), Curr Opin Biotech 20:685-691, and Strohl, WR and Strohl LM, “Antibody Fc engineering for optimal antibody performance” In Therapeutic Antibody Engineering, Cambridge: Woodhead Publishing (2012), pp 225-249). These strategies include reduction of effector function through modification of glycosylation, use of IgG2 / IgG4 scaffolds, or the introduction of mutations in the hinge or CH2 regions of the Fc. For example, U.S. Patent Publication No. 2011 / 0212087 (Strohl), International Patent Publication No. WO 2006 / 105338 (Xencor), U.S. Patent Publication No. 2012 / 0225058 (Xencor), U.S. Patent Publication No. 2012 / 0251531 (Genentech), and Strop et al. ((2012) J. Mol. Biol. 420: 204-219), each of which is incorporated by reference in its entirety, describe specific modifications designed to reduce FcgR or complement binding to the Fc.

[0350] Specific, non-limiting examples of amino acid modifications intended to reduce FcgR or complement binding to the Fc include those identified in the following TABLE 7:TABLE 7. Modifications designed to reduce FcgR or complement binding to the Fc111IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0351] In some embodiments, an antibody, or an antigen binding fragment thereof, provided herein comprises one or more alterations that is designed to improve or diminish Clq binding and / or CDC. See U.S. Pat. No. 6,194,551; WO 99 / 51642; and Idusogie et al., J. Immunol., 2000, 164:4178-4184; each of which is incorporated by reference in its entirety.

[0352] In certain embodiments, the heavy chain comprises a constant heavy chain sequence selected from a sequence set forth in any one of SEQ ID NOs: 47-270. In certain embodiments, the constant heavy chain sequence, (e.g., a constant heavy chain sequence selected from any one of SEQ ID NOs: 47-158) further comprises a C-terminal lysine (e.g., any one of SEQ ID NOs: 159-270). Although a C-terminal lysine may be present in the corresponding coding sequence of the constant heavy chain region, it may be cleaved off during manufacture or after administration. Accordingly, sequences of heavy chain constant regions with and without the C- terminal lysine are provided herein. Consequently, a composition resulting from the manufacture of an antibody comprising a C-terminal lysine in the corresponding coding sequence of the constant heavy chain region (e.g., an antibody with a coding sequence that encodes any one of SEQ ID NOs: 159-270) may comprise antibodies having a constant heavy chain sequence containing a C-terminal lysine (e.g., selected from SEQ ID NOs: 159-270), antibodies having a112IPTS / 200090251.1Goodwin Ref: PRG-062WO constant heavy chain sequence lacking a C-terminal lysine (e.g., the corresponding sequence of any one of SEQ ID NOs: 47-158), or a mixture thereof. For example, a composition comprising an antibody comprising the constant heavy chain sequence of SEQ ID NO: 173 that is administered to a subject may comprise antibodies having the constant heavy chain sequence set forth in SEQ ID NO: 173 or SEQ ID NO: 61, or a mixture thereof (e.g., a mixture of antibodies having either a constant heavy chain sequence of SEQ ID NO: 173 or a constant heavy chain sequence of SEQ ID NO: 61 and / or antibodies containing both constant heavy chain sequences (e.g., in a single antibody containing two constant heavy chain sequences)).

[0353] In certain embodiments, an anti-TSLP antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence provided in TABLE 4 (e.g., a VH sequence and a VL sequence from the same row of TABLE 4), together with a heavy chain constant region selected from a sequence set forth in any one of SEQ ID NOs: 47-270. In certain embodiments, an anti-TSLP antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence provided in TABLE 4, together with a heavy chain constant region selected from a sequence set forth in any one of SEQ ID NOs: 47-270 and a light chain constant region selected from any one of SEQ ID NOs: 453-456.

[0354] In certain embodiments, an anti-TSLP antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence provided in TABLE 13 (e.g., a VH sequence and a VL sequence from the same row of TABLE 13), together with a heavy chain constant region selected from a sequence set forth in any one of SEQ ID NOs: 47- 270. In certain embodiments, an anti-TSLP antibody, or an antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence provided in TABLE 13, together with a heavy chain constant region selected from a sequence set forth in any one of SEQ ID NOs: 47-270 and a light chain constant region selected from any one of SEQ ID NOs: 453-456.

[0355] In certain embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 34 and a VL sequence set forth in SEQ ID NO: 41; and the constant heavy chain comprises a human IgG sequence selected from a sequence set forth in any one of SEQ ID NOs: 47-270 (e.g., SEQ ID NO: 61 or SEQ ID NO: 173). In certain embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 34 and a VL sequence set forth in SEQ ID NO: 43; and the constant heavy chain comprises a human IgG sequence selected from a sequence set forth in any one of SEQ ID NOs: 47-270 (e.g., SEQ ID NO: 61 or SEQ ID NO: 173). In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a human lambda light chain constant region sequence (e.g., any one of SEQ ID NOs: 453-456).113IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0356] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 457 and / or SEQ ID NO: 459. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 458. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 457 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 458. The heavy chain sequence of SEQ ID NO: 457 contains a C-terminal lysine, which may be cleaved off during manufacture or after administration, resulting in an antibody containing the heavy chain sequence of SEQ ID NO: 459. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 459 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 458.

[0357] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 460. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 461. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 460 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 461.

[0358] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 462. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 463. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 462 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 463.

[0359] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 464. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 465. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 464 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 465.

[0360] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 466. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 467. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an114IPTS / 200090251.1Goodwin Ref: PRG-062WO amino acid sequence set forth in SEQ ID NO: 466 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 467.

[0361] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 468. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 469. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 468 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 469.

[0362] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 470. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 471. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 470 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 471.

[0363] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 472. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 473. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 472 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 473.

[0364] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 474. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 475. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 474 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 475.

[0365] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 519. In certain embodiments, the anti-TSLP antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 520. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 519 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 520.

[0366] In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 521. In certain embodiments, the anti-TSLP115IPTS / 200090251.1Goodwin Ref: PRG-062WO antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 522. In certain embodiments, the anti-TSLP antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 521 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 522.

[0367] In certain embodiments, the Fc region of an anti-TSLP antibody, or antigen binding fragment thereof, comprises one or more amino acid substitutions, wherein the one or more substitutions result in an increase in one or more of antibody half-life, ADCC activity, ADCP activity, or CDC activity compared with the Fc region without the one or more amino acid substitutions. In certain embodiments, the one or more amino acid substitutions results in increased antibody half-life at pH 6.0 compared to an antibody comprising a wild-type Fc region. In certain embodiments, the anti-TSLP antibody has an increased half-life that is about 10,000-fold, 1,000-fold, 500-fold, 100-fold, 50-fold, 20-fold, 10-fold, 9-fold, 8-fold, 7-fold, 6- fold, 5-fold, 4.5-fold, 4-fold, 3.5-fold, 3-fold, 2.5-fold, 2-fold, 1.95-fold, 1.9-fold, 1.85-fold, 1.8- fold, 1.75-fold, 1.7-fold, 1.65-fold, 1.6-fold, 1.55-fold, 1.50-fold, 1.45-fold, 1.4-fold, 1.35-fold, 1.3-fold, 1.25-fold, 1.2-fold, 1.15-fold, 1.1-fold, or 1.05 -fold longer compared to an antibody comprising a wild-type Fc region. In certain embodiments, the anti-TSLP antibody has an increased half-life that is about 10,000-fold, 1,000-fold, 500-fold, 100-fold, 50-fold, 20-fold, 10- fold, 9-fold, 8-fold, 7-fold, 6-fold, 5-fold, 4.5-fold, 4-fold, 3.5-fold, 3-fold, 2.5-fold, 2-fold, 1.95- fold, 1.9-fold, 1.85-fold, 1.8-fold, 1.75-fold, 1.7-fold, 1.65-fold, 1.6-fold, 1.55-fold, 1.50-fold, 1.45-fold, 1.4-fold, 1.35-fold, 1.3-fold, 1.25-fold, 1.2-fold, 1.15-fold, 1.1-fold, or 1.05-fold longer compared to tezepelumab. In certain embodiments, the anti-TSLP antibody has an increased half-life that is about 2.5-fold, 2.4-fold, 2.3-fold, 2.2-fold, 2.1-fold, 2.0-fold, 1.9-fold, or 1.8-fold longer compared to tezepelumab.

[0368] In certain embodiments, an anti-OX40L antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence provided in TABLE 5 (e.g., a VH sequence and a VL sequence from the same row of TABLE 5), together with a heavy chain constant region set forth in any one of SEQ ID NOs: 47-270 and a light chain constant region. In certain embodiments, an anti-OX40L antibody, or antigen binding fragment thereof, provided herein comprises a VH sequence and a VL sequence provided in TABLE 5, together with a heavy chain constant region selected from a sequence set forth in any one of SEQ ID NOs: 47-270 and a light chain constant region set forth in SEQ ID NO: 46.

[0369] In certain embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 335 and a VL sequence set forth in SEQ ID NO: 339; and the constant heavy chain comprises a human IgG sequence selected from 116IPTS / 200090251.1Goodwin Ref: PRG-062WO a sequence set forth in any one of SEQ ID NOs: 47-270 (e.g., SEQ ID NO: 61 or SEQ ID NO: 173). In certain embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 336 and a VL sequence set forth in SEQ ID NO: 340; and the constant heavy chain comprises a human IgG sequence selected from a sequence set forth in any one of SEQ ID NOs: 47-270 (e.g., SEQ ID NO: 61 or SEQ ID NO: 173). In certain embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 337 and a VL sequence set forth in SEQ ID NO: 341; and the constant heavy chain comprises a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270 (e.g., SEQ ID NO: 61 or SEQ ID NO: 173). In certain embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, comprises a VH sequence set forth in SEQ ID NO: 338 and a VL sequence set forth in SEQ ID NO: 342; and the constant heavy chain comprises a human IgG sequence selected from a sequence set forth in any of SEQ ID NOs: 47-270 (e.g., SEQ ID NO: 61 or SEQ ID NO: 173). In certain embodiments, the antibody, or antigen binding fragment thereof, comprises a light chain constant region set forth in SEQ ID NO: 46.

[0370] In certain embodiments, the anti-OX40L antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 478 and / or SEQ ID NO: 479. In certain embodiments, the anti-OX40L antibody comprises a light chain comprising an amino acid sequence set forth in SEQ ID NO: 480. In certain embodiments, the anti-OX40L antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 478 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 480. The heavy chain sequence of SEQ ID NO: 478 contains a C-terminal lysine, which may be cleaved off during manufacture or after administration, resulting in an antibody containing the heavy chain sequence of SEQ ID NO: 479. In certain embodiments, the anti-OX40L antibody comprises a heavy chain comprising an amino acid sequence set forth in SEQ ID NO: 479 and a light chain comprising an amino acid sequence set forth in SEQ ID NO: 480.

[0371] In certain embodiments, the Fc region of anti-OX40L antibody, or antigen binding fragment thereof, comprises one or more amino acid substitutions, wherein the one or more substitutions result in an increase in one or more of antibody half-life, ADCC activity, ADCP activity, or CDC activity compared with the Fc region without the one or more amino acid substitutions. In certain embodiments, the one or more amino acid substitutions results in increased antibody half-life at pH 6.0 compared to an antibody comprising a wild-type Fc region. In certain embodiments, the antibody has an increased half-life that is about 10,000-fold, 1,000-fold, 500-fold, 100-fold, 50-fold, 20-fold, 10-fold, 9-fold, 8-fold, 7-fold, 6-fold, 5-fold,117IPTS / 200090251.1Goodwin Ref: PRG-062WO4.5-fold, 4-fold, 3.5-fold, 3-fold, 2.5-fold, 2-fold, 1.95-fold, 1.9-fold, 1.85-fold, 1.8-fold, 1.75- fold, 1.7-fold, 1.65-fold, 1.6-fold, 1.55-fold, 1.50-fold, 1.45-fold, 1.4-fold, 1.35-fold, 1.3-fold, 1.25-fold, 1.2-fold, 1.15-fold, 1.1-fold, or 1.05-fold longer compared to an OX40L antibody comprising a wild-type Fc region. In certain embodiments, the anti-OX40L antibody has an increased half-life that is about 10,000-fold, 1,000-fold, 500-fold, 100-fold, 50-fold, 20-fold, 10- fold, 9-fold, 8-fold, 7-fold, 6-fold, 5-fold, 4.5-fold, 4-fold, 3.5-fold, 3-fold, 2.5-fold, 2-fold, 1.95- fold, 1.9-fold, 1.85-fold, 1.8-fold, 1.75-fold, 1.7-fold, 1.65-fold, 1.6-fold, 1.55-fold, 1.50-fold, 1.45-fold, 1.4-fold, 1.35-fold, 1.3-fold, 1.25-fold, 1.2-fold, 1.15-fold, 1.1-fold, or 1.05-fold longer compared to amlitelimab and oxelumab. In certain embodiments, the anti-OX40L antibody has an increased half-life that is about 2.5-fold, 2.4-fold, 2.3-fold, 2.2-fold, 2.1-fold, 2.0-fold, 1.9-fold, or 1.8-fold longer compared to amlitelimab and oxelumab.

[0372] In certain embodiments, the Fc region comprises one or more amino acid substitutions, wherein the one or more substitutions result in a decrease in one or more of ADCC activity, ADCP activity, or CDC activity compared with the Fc region without the one or more substitutions.

[0373] In certain embodiments, the one or more amino acid substitutions is selected from the group consisting of S228P (SP), M252Y, S254T, T256E, T256D, T250Q, H285D, T307A, T307Q, T307R, T307W, L309D, Q411H, Q311V, A378V, E380A, M428L, N434A, N434S, N297A, D265A, L234A, L235A, and N434W. In certain embodiments, the one or more amino acid substitutions comprises a specific combination of amino acid substitutions selected from the group consisting of M428L / N434S (LS), M252Y / S254T / T256E (YTE), T250Q / M428L, T307A / E380A / N434A, T256D / T307Q (DQ), T256D / T307W (DW), M252Y / T256D (YD), T307Q / Q311 V / A378V (QVV), T256D / H285D / T307R / Q311 V / A378V (DDRVV), L309D / Q311H / N434S (DHS), S228P / L235E (SPLE), L234A / L235A (LALA), M428L / N434A (LA), L235A / G237A (LAGA), L234A / L235A / G237A (LALAGA), L234A / L235A / P329G (LALAPG), D265A / YTE, LALA / YTE, LAGA / YTE, LALAGA / YTE, LALAPG / YTE, N297A / LS, D265A / LS, LALA / LS, LALAGA / LS, LALAPG / LS, N297A / DHS, D265A / DHS, LALA / DHS, LAGA / DHS, LALAGA / DHS, LALAPG / DHS, SP / YTE, SPLE / YTE, SP / LS, SPLE / LS, SP / DHS, SPLE / DHS, N297A / LA, D265A / LA, LALA / LA, LAGA / LA, LALAGA / LA, LALAPG / LA, N297A / N434A, D265A / N434A, LALA / N434A, LAGA / N434A, LALAGA / N434A, LALAPG / N434A, N297A / N434W, D265A / N434W, LALA / N434W, LAGA / N434W, LALAGA / N434W, LALAPG / N434W, N297A / DQ, D265A / DQ, LALA / DQ, LAGA / DQ, LALAGA / DQ, LALAPG / DQ, N297A / DW, D265A / DW, LALA / DW, LAGA / DW, LALAGA / DW, LALAPG / DW, N297A / YD, D265A / YD, LALA / YD, LAGA / YD,118IPTS / 200090251.1Goodwin Ref: PRG-062WOLALAGA / YD, LALAPG / YD, T307Q / Q311V / A378V (QVV), N297A / QVV, D265A / QVV, LALA / QVV, LAGA / QVV, LALAGA / QVV, LALAPG / QVV, DDRVV, N297A / DDRVV, D265A / DDRVV, LALA / DDRVV, LAGA / DDRVV, LALAGA / DDRVV, and LALAPG / DDRVV.

[0374] Although the EU numbering system is typically used to identify the positions of the various Fc mutations described herein, direct numbering can also be used. For example, in certain embodiments, an antibody described herein comprises an Fc region with YTE mutations at positions 257, 259, and 261 or 253, 255 and 257, respectively. In certain embodiments, an antibody described herein comprises an Fc region with LALA mutations at positions 239 and 240 or 235 and 236, respectively. In certain embodiments, an antibody (e.g., a TSLP antibody) described herein comprises an Fc region (e.g., a human IgGl Fc region) with YTE mutations at positions 257, 259, and 261, respectively, and with LALA mutations at positions 239 and 240, respectively. In certain embodiments, an antibody (e.g., an OX40L antibody) described herein comprises an Fc region (e.g., a human IgGl Fc region) with YTE mutations at positions 253, 255 and 257 and with LALA mutations at positions 235 and 236, respectively. In certain embodiments, a TSLP antibody described herein comprises the VH and VL of Antibody 5 and an Fc region (e.g., a human IgGl Fc region) comprising YTE mutations at positions 257, 259, and 261 (M257Y / S259T / T261E), respectively, and with LALA mutations at positions 239 and 240 (L239A / L240A), respectively (e.g., as shown in the heavy chain sequences of SEQ ID NOs: 457 and 459). . In certain embodiments, an OX40L antibody described herein comprises the VH and VL of Construct 114 and an Fc region comprising YTE mutations at positions 253, 255 and 257 (M253Y / S255T / T257E), respectively and with LALA mutations at positions 235 and 236 (L235A / L236A), respectively (e.g., as shown in the heavy chain sequences of SEQ ID NOs: 478 and 479).

[0375] In certain embodiments the human Fc region comprises a human IgGl Fc region with LALA mutations. In certain embodiments, the human Fc region comprises a human IgGl Fc region with YTE mutations. In certain embodiments, the human Fc region comprises a human IgGl Fc region with LALA and YTE mutations. In certain embodiments, when direct numbering is used, “YTE” and “LALA” mutations can be located at different amino acid position numbers. For example, a human Fc region can comprise a human IgGl Fc region with LALA mutations at L239A / L240A and / or YTE mutations at M257Y / S259T / T261E. As another example, a human Fc region can comprise a human IgGl Fc region with LALA mutations at L235A / L236A and / or YTE mutations at M253Y / S255T / T257E.119IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0376] In certain embodiments, the Fc region binds an Fey Receptor selected from the group consisting of: FcyRI, FcyRIIa, FcyRIIb, FcyRIIc, FcyRIIIa, and FcyRIIIb. In certain embodiments, the Fc region binds an Fey Receptor with higher affinity at pH 6.0 compared to an antibody comprising a wild-type Fc region.TSLP Binding

[0377] The affinity of an anti-TSLP antibody, or antigen binding fragment thereof, for TSLP can be represented by the dissociation equilibrium constant (KD). Affinity can be measured by common methods known in the art, including those described herein, such as surface plasmon resonance (SPR) technology (e.g., BIACORE®) or biolayer interferometry (e.g., FORTEBIO®).

[0378] With regard to the binding of an antibody to a target molecule, the terms “bind,” “specific binding,” “specifically binds to,” “specific for,” “selectively binds,” and “selective for” a particular antigen (e.g., a polypeptide target) or an epitope on a particular antigen mean binding that is measurably different from a non-specific or non-selective interaction (e.g., with a non-target molecule). Specific binding can be measured, for example, by measuring binding to a target molecule (z.e., TSLP) and comparing it to binding to a non-target molecule. Specific binding can also be determined by competition with a control molecule that mimics the epitope recognized on the target molecule. In that case, specific binding is indicated if the binding of the antibody to the target molecule is competitively inhibited by the control molecule. In some embodiments, the affinity of an anti-TSLP antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 50% of the affinity for TSLP. In some embodiments, the affinity of an anti-TSLP antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 40% of the affinity for TSLP. In some embodiments, the affinity of an anti- TSLP antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 30% of the affinity for TSLP. In some embodiments, the affinity of an anti-TSLP antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 20% of the affinity for TSLP. In some embodiments, the affinity of an anti-TSLP antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 10% of the affinity for TSLP. In some embodiments, the affinity of an anti-TSLP antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 1% of the affinity for TSLP. In some embodiments, the affinity of an anti-TSLP antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 0.1% of the affinity for TSLP.120IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0379] In certain embodiments, the antibody, or antigen binding fragment thereof, binds a TSLP sequence set forth in SEQ ID NO: 271 or 272.

[0380] In certain embodiments, the antibody, or antigen binding fragment thereof, binds to a TSLP sequence set forth in SEQ ID NO: 271 or 272 with a KD of less than or equal to about 1, 2, 3, 4, 5, 6, 7, 8, or 9 x 10'9M, as measured by surface plasmon resonance (SPR). In certain embodiments, the antibody, or antigen binding fragment thereof, binds to a TSLP sequence set forth in SEQ ID NO: 271 or 272 with a KD of less than or equal to about 1 x 10'10M, as measured by surface plasmon resonance (SPR). In certain embodiments, the antibody, or antigen binding fragment thereof, binds to human TSLP with a KD of less than or equal to about 1 x 10'9M, as measured by surface plasmon resonance (SPR).

[0381] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein binds TSLP with a KD of less than or equal to about 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.95, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, or 10 x 10'8M, as measured by ELISA or any other suitable method known in the art. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein binds TSLP with a KD of less than or equal to about 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.95, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, or 10 x IO’9M, as measured by ELISA or any other suitable method known in the art.

[0382] In some embodiments, the KD of the antibody, or antigen binding fragment thereof, provided herein for the binding of TSLP is between about 0.001-0.01, 0.01-0.1, 0.01-0.05, 0.05- 0.1, 0.1-0.5, 0.5-1, 0.25-0.75, 0.25-0.5, 0.5-0.75, 0.75-1, 0.75-2, 1.1-1.2, 1.2-1.3, 1.3-1.4, 1.4- 1.5, 1.5-1.6, 1.6-1.7, 1.7-1.8, 1.8-1.9, 1.9-2, 1-2, 1-5, 2-7, 3-8, 3-5, 4-6, 5-7, 6-8, 7-9, 7-10, or 5- 10 x 10'8M, as measured by ELISA or any other suitable method known in the art. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein binds TSLP with a KD of less than or equal to about 1 x 10'8M, or less than or equal to about 1 x 10'9M as measured by ELISA or any other suitable method known in the art.

[0383] In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds TSLP with a KD of less than or equal to about 10, 9, 8, 7, 6, 5, 4.5, 4, 3.5, 3, 2.5, 2, 1.98, 1.95, 1.9, 1.85, 1.8, 1.75, 1.7, 1.65, 1.6, 1.55, 1.50, 1.45, 1.4, 1.3, 1.2, 1.1, 1, 0.9, 0.85, 0.8, 0.75, 0.7, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1, 0.05, 0.01, 0.005, 0.001, 0.0005, or 0.0001 x 10'8M, or less, as measured by ELISA or any other suitable method known in the art . In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds TSLP with a KD between 5-3, 4-2, 3-1, 1.9-1.8, 1.8-1.7, 1.7-1.6, 1.6-1.5, 1.9-1.5,121IPTS / 200090251.1Goodwin Ref: PRG-062WO1.5-1, 1-0.8, 1-0.5, 0.9-0.6, 0.7-0.4, 0.6-0.2, 0.5-0.3, 0.3-0.2, 0.2-0.1, 0.1-0.01, 0.01-0.001, or 0.001-0.0001 x 10'8M as measured by ELISA or any other suitable method known in the art.

[0384] In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds FcRn with an affinity at pH 7.4 compared to pH 6.0 at a ratio (pH 7.4 / pH 6.0) of about 10,000, 1,000, 500, 100, 50, 20, 10, 9, 8, 7, 6, 5, 4.5, 4, 3.5, 3, 2.5, 2, 1.95, 1.9, 1.85, 1.8, 1.75, 1.7, 1.65, 1.6, 1.55, 1.50, 1.45, 1.4, 1.3, 1.2, 1.1, or 1.05, as measured by ELISA or any other suitable method known in the art. In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds FcRn with an affinity at pH 6.0 compared to pH 7.4 at a ratio (pH 6.0 / pH 7.4) of about 1-0.8, 1-0.5, 0.9-0.6, 0.7-0.4, 0.6-0.2, 0.5-0.3, 0.3-0.2, 0.2-0.1, 0.1-0.01, 0.01-0.001, or 0.001-0.0001 x 10'8M as measured by ELISA or any other suitable method known in the art.OX40L Binding

[0385] The affinity of an anti-OX40L antibody, or antigen binding fragment thereof, for OX40L can be represented by the dissociation equilibrium constant (KD). The kinetic components that contribute to the dissociation equilibrium constant are described in more detail below. Affinity can be measured by common methods known in the art, including those described herein, such as surface plasmon resonance (SPR) technology (e.g., BIACORE®) or biolayer interferometry (e.g., FORTEBIO®).

[0386] With regard to the binding of an antibody to a target molecule, the terms “bind,” “specific binding,” “specifically binds to,” “specific for,” “selectively binds,” and “selective for” a particular antigen (c.g, a polypeptide target) or an epitope on a particular antigen mean binding that is measurably different from a non-specific or non-selective interaction (c.g, with a non-target molecule). Specific binding can be measured, for example, by measuring binding to a target molecule (z.e., OX40L) and comparing it to binding to a non-target molecule. In some embodiments, the affinity of an anti-OX40L antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 50% of the affinity for OX40L. In some embodiments, the affinity of an anti-OX40L antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 40% of the affinity for OX40L. In some embodiments, the affinity of an anti-OX40L antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 30% of the affinity for OX40L. In some embodiments, the affinity of an anti-OX40L antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 20% of the affinity for OX40L. In some embodiments, the affinity of an anti-OX40L antibody, or122IPTS / 200090251.1Goodwin Ref: PRG-062WO antigen binding fragment thereof, for a non-target molecule is less than about 10% of the affinity for OX40L. In some embodiments, the affinity of an anti-OX40L antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 1% of the affinity for OX40L. In some embodiments, the affinity of an anti-OX40L antibody, or antigen binding fragment thereof, for a non-target molecule is less than about 0.1% of the affinity for OX40L.

[0387] In certain embodiments, the antibody, or antigen binding fragment thereof, binds an OX40L sequence set forth in SEQ ID NO: 739.

[0388] In certain embodiments, the antibody, or antigen binding fragment thereof, binds to an OX40L sequence set forth in SEQ ID NO: 739 with a KD of less than or equal to about 1, 2, 3, 4, 5, 6, 7, 8, or 9 x 10'9M, as measured by surface plasmon resonance (SPR). In certain embodiments, the antibody, or antigen binding fragment thereof, binds to an OX40L sequence set forth in SEQ ID NO: 739 with a KD of less than or equal to about 1 x 10'10M, as measured by surface plasmon resonance (SPR). In certain embodiments, the antibody, or antigen binding fragment thereof, binds to human OX40L with a KD of less than or equal to about 1 x 10'9M, as measured by surface plasmon resonance (SPR).

[0389] In some embodiments, an antibody, or antigen binding fragment thereof, provided herein binds OX40L with a KD of less than or equal to about 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.95, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, or 10 x 10'8M, as measured by ELISA or any other suitable method known in the art. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein binds OX40L with a KD of less than or equal to about 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.95, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, or 10 x IO’9M, as measured by ELISA or any other suitable method known in the art.

[0390] In some embodiments, the KD of the antibody, or antigen binding fragment thereof, provided herein for the binding of OX40L is between about 0.001-0.01, 0.01-0.1, 0.01-0.05, 0.05-0.1, 0.1-0.5, 0.5-1, 0.25-0.75, 0.25-0.5, 0.5-0.75, 0.75-1, 0.75-2, 1.1-1.2, 1.2-1.3, 1.3-1.4, 1.4-1.5, 1.5-1.6, 1.6-1.7, 1.7-1.8, 1.8-1.9, 1.9-2, 1-2, 1-5, 2-7, 3-8, 3-5, 4-6, 5-7, 6-8, 7-9, 7-10, or 5-10 x 10'8M, as measured by ELISA or any other suitable method known in the art. In some embodiments, an antibody, or antigen binding fragment thereof, provided herein binds OX40L with a KD of less than or equal to about 1 x 10'8M, or less than or equal to about 1 x 10'9M as measured by ELISA or any other suitable method known in the art.

[0391] In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds OX40L with a KD of less than or equal to about 10, 9, 8, 7, 6, 5, 4.5, 4, 3.5, 3, 2.5, 123IPTS / 200090251.1Goodwin Ref: PRG-062WO2, 1.98, 1.95, 1.9, 1.85, 1.8, 1.75, 1.7, 1.65, 1.6, 1.55, 1.50, 1.45, 1.4, 1.3, 1.2, 1.1, 1, 0.9, 0.85, 0.8, 0.75, 0.7, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1, 0.05, 0.01, 0.005, 0.001, 0.0005, or 0.0001 x 10'8M, or less, as measured by ELISA or any other suitable method known in the art . In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds OX40L with a KD between 5-3, 4-2, 3-1, 1.9-1.8, 1.8-1.7, 1.7-1.6, 1.6-1.5, 1.9-1.5, 1.5-1, 1-0.8, 1-0.5, 0.9-0.6, 0.7-0.4, 0.6-0.2, 0.5-0.3, 0.3-0.2, 0.2-0.1, 0.1-0.01, 0.01- 0.001, or 0.001-0.0001 x 10'8M as measured by ELISA or any other suitable method known in the art.

[0392] In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds FcRn with an affinity at pH 7.4 compared to pH 6.0 at a ratio (pH 7.4 / pH 6.0) of about 10,000, 1,000, 500, 100, 50, 20, 10, 9, 8, 7, 6, 5, 4.5, 4, 3.5, 3, 2.5, 2, 1.95, 1.9, 1.85, 1.8, 1.75, 1.7, 1.65, 1.6, 1.55, 1.50, 1.45, 1.4, 1.3, 1.2, 1.1, or 1.05, as measured by ELISA or any other suitable method known in the art. In some embodiments, the antibody, or antigen binding fragment thereof, provided herein binds FcRn with an affinity at pH 6.0 compared to pH 7.4 at a ratio (pH 6.0 / pH 7.4) of about 1-0.8, 1-0.5, 0.9-0.6, 0.7-0.4, 0.6-0.2, 0.5-0.3, 0.3-0.2, 0.2-0.1, 0.1-0.01, 0.01-0.001, or 0.001-0.0001 x 10'8M as measured by ELISA or any other suitable method known in the art.Combinations of Anti-TSLP Antibodies and Anti-OX40L Antibodies

[0393] Any of the anti-TSLP antibodies, or antigen binding fragments thereof, described herein can be combined with any of the anti-OX40L antibodies, or antigen binding fragments thereof, described herein (e.g., combined in a single composition or used in combination for treatment of a subject). In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, described herein, is selected from TABLE 3, TABLE 4, TABLE 12, or TABLE 13 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5.

[0394] In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 5 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 7 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 23 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti- TSLP antibody, or antigen binding fragment thereof, is Antibody 29 and the anti-OX40L124IPTS / 200090251.1Goodwin Ref: PRG-062WO antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 38 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 39 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 31 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 36 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti- TSLP antibody, or antigen binding fragment thereof, is Antibody 44 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 51 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is Antibody 59 and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is tezepelumab and the anti-OX40L antibody, or antigen fragment thereof, described herein is selected from TABLE 5.

[0395] In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 114 and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 4. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 114 and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 13. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 231 and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 4. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 231 and the anti- TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 13. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 328 and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 4. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 328 and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 13. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 105 and the anti-TSLP antibody, or antigen fragment125IPTS / 200090251.1Goodwin Ref: PRG-062WO thereof, described herein is selected from TABLE 4. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is Construct 105 and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 13. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is amlitelimab and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 4. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is amlitelimab and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 13. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is oxelumab and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 4. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is oxelumab and the anti-TSLP antibody, or antigen fragment thereof, described herein is selected from TABLE 13.

[0396] Exemplary combinations of anti-TSLP antibodies and anti-OX40L antibodies are set forth in TABLE 8, below.TABLE 8. Combinations of anti-TSLP antibodies and anti-OX40L antibodies126IPTS / 200090251.1Goodwin Ref: PRG-062WO127IPTS / 200090251.1Goodwin Ref: PRG-062WO128IPTS / 200090251.1Goodwin Ref: PRG-062WO129IPTS / 200090251.1Goodwin Ref: PRG-062WO130IPTS / 200090251.1Goodwin Ref: PRG-062WO131IPTS / 200090251.1Goodwin Ref: PRG-062WO

[0397] In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, and the anti-OX40L antibody, or antigen fragment thereof, are combined in a single composition (e.g., both antibodies, or antigen binding fragments thereof, are co-formulated in a single pharmaceutical composition with one or more pharmaceutically acceptable excipients). The composition can be administered to a subject (e.g., a mammalian subject, such as a human subject) for treatment of a disease or disorder in the subject, such as an inflammatory disorder or disease (e.g., atopic dermatitis, asthma, or COPD).

[0398] In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, and the anti-OX40L antibody, or antigen fragment thereof, are in separate compositions (e.g., a first pharmaceutical composition containing an anti-TSLP antibody, or an antigen binding fragment thereof, and a pharmaceutically acceptable excipient and a second pharmaceutical composition containing an anti-OX40L antibody, or an antigen binding fragment thereof, and a pharmaceutically acceptable excipient). These separate compositions can be co-administered to a subject (e.g., a mammalian subject, such as a human subject) for treatment of a disease or disorder in the subject, such as an inflammatory disorder or disease (e.g., atopic dermatitis, asthma, or COPD). In some embodiments, the composition containing the anti-TSLP antibody, or an antigen binding fragment thereof, is administered at about the same time as the composition containing the anti-OX40L antibody, or an antigen binding fragment thereof. In other embodiments, the composition containing the anti-TSLP antibody, or an antigen binding fragment thereof, and the composition containing the anti-OX40L antibody, or an antigen binding fragment thereof are administered sequentially, such that the action of the two overlaps and their combined effect is such that the reduction in a symptom, or other parameter related to the disease or disorder is greater than what would be observed with one antibody, or antigen binding fragment thereof, delivered alone or in the absence of the other. In some embodiments, the anti-TSLP antibody, or antigen binding fragment thereof, is administered before the anti- OX40L antibody, or antigen binding fragment thereof, by intervals ranging from minutes, hours, days to weeks. In some embodiments, the anti-OX40L antibody, or antigen binding fragment thereof, is administered before the anti-TSLP antibody, or antigen binding fragment thereof, by intervals ranging from minutes, hours, days to weeks.Pharmaceutical Compositions

[0399] The present application provides compositions comprising the antibodies or antigen binding fragments thereof described herein, including pharmaceutical compositions comprising any one or more of the antibodies, or antigen binding fragments thereof, described herein with 132IPTS / 200090251.1Goodwin Ref: PRG-062WO one or more pharmaceutically acceptable excipients. In some embodiments the composition is sterile. The pharmaceutical compositions generally comprise an effective amount of a TSLP antibody, or an antigen binding fragment thereof, and / or an OX40L antibody, or an antige...

Claims

1. Goodwin Ref: PRG-062WOCLAIMS1. An isolated antibody, or antigen binding fragment thereof, that binds TSLP, comprising: a) a variable heavy (VH) chain sequence having three heavy chain CDR sequences, CDR-H1, CDR- H2, and CDR-H3; and b) a variable light (VL) chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27;(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30;(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; or(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and an isolated antibody, or antigen binding fragment thereof, that binds OX40L.

2. The isolated antibodies of claim 1, wherein the isolated antibody that binds OX40L comprises a CDR-H1, CDR-H2, CDR-H3, CDR-L1, CDR-L2, and CDR-L3 of an antibody selected from amlitelimab and oxelumab.288IPTS / 200090251.1Goodwin Ref: PRG-062WO3. The isolated antibodies of claim 1, wherein the isolated antibody, or antigen binding fragment thereof, that binds OX40L comprises: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a VL chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3, wherein the isolated antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328;(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330;(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332; or(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs:282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.289IPTS / 200090251.1Goodwin Ref: PRG-062WO4. An isolated antibody, or antigen binding fragment thereof, that binds TSLP; and an isolated antibody, or antigen binding fragment thereof, that binds OX40L, comprising: a) a variable heavy (VH) chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a variable light (VL) chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3; wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328;(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs:312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330;(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any of SEQ ID NOs: 331 and 332; or(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs:282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.290IPTS / 200090251.1Goodwin Ref: PRG-062WO5. The isolated antibodies of claim 4, wherein the isolated antibody, or antigen binding fragment thereof, that binds TSLP comprises a CDR-H1, CDR-H2, CDR-H3, CDR-L1, CDR- L2, and CDR-L3 of an antibody selected from tezepelumab, GR2002, TQC2731, solrikitug, hu23bl2, 43B1-H2L2, and 43B1-H6LL6. The isolated antibodies of claim 4, wherein the isolated antibody, or antigen binding fragment thereof, that binds TSLP comprises: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a VL chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3, wherein the isolated antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27;(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30;(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; or(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NO: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396.291IPTS / 200090251.1Goodwin Ref: PRG-062WO7. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273,274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

8. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330.

9. The isolated antibodies of claim 3 or 6, wherein:292IPTS / 200090251.1Goodwin Ref: PRG-062WO(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs:279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

10. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

11. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:293IPTS / 200090251.1Goodwin Ref: PRG-062WO(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

12. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330.

13. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6,294IPTS / 200090251.1Goodwin Ref: PRG-062WO and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

14. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 19 and 22; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 25 or the amino acid sequence DVS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 30; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

15. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3,295IPTS / 200090251.1Goodwin Ref: PRG-062WO6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

16. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330.

17. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3,296IPTS / 200090251.1Goodwin Ref: PRG-062WO6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

18. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 351 and 365; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 392; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

19. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3,297IPTS / 200090251.1Goodwin Ref: PRG-062WO6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328.

20. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(ii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 276, 277, and 278; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 288, 289, and 290; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 300, 301, and 302; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 312, 313, and 343; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 321 or the amino acid sequence GAT; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 329 and 330.

21. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3,298IPTS / 200090251.1Goodwin Ref: PRG-062WO6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iii) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 279, 280, and 281; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 291, 292, and 293; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 303, 304, and 305; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 344, 314, and 315; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 323 or the amino acid sequence DAS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 331 and 332.

22. The isolated antibodies of claim 3 or 6, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR- L1 comprising the sequence set forth in any one of SEQ ID NOs: 356 and 372; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 396; and(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(iv) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 282, 283, and 284; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 294, 295, and 296; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 306, 307, and 308; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 316, 317, and 318; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 325 or the amino acid sequence ATS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 333 and 334.

23. The isolated antibodies of any one claims 1-22, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a heavy chain variable domain (VH) sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 32-36.299IPTS / 200090251.1Goodwin Ref: PRG-062WO24. The isolated antibodies of claim 23, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34.

25. The isolated antibodies of any one of claims 1-24, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 335-338.

26. The isolated antibodies of any one of claims 1-25, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a light chain variable domain (VL) sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 37-45 and 402-438.

27. The isolated antibodies of claim 26, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VL sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 41, 43, 415, and 421.

28. The isolated antibodies of any one of claims 1-27, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VL sequence comprising the amino acid sequence set forth in any one of SEQ ID NOs: 339-342.

29. The isolated antibodies of any one of claims 23-28, wherein:(a) the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 32;(ii) a VH sequence comprising the amino acid sequence set forth in SEQ IDNO: 33; or(iii) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and / or(iv) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41;(v) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43;(vi) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; or(vii) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and / or300IPTS / 200090251.1Goodwin Ref: PRG-062WO(b) the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335;(ii) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336;(iii) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; or(iv) a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and / or(v) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339;(vi) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 400;(viii) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 401; or(ix) a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 402.

30. The isolated antibodies of claim 29, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34.

31. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41.

32. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43.

33. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415.301IPTS / 200090251.1Goodwin Ref: PRG-062WO34. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421.

35. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

36. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

37. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.

38. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

39. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

40. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ302IPTS / 200090251.1Goodwin Ref: PRG-062WOID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

41. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.

42. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 41; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

43. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO:339.

44. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO:340.

45. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that303IPTS / 200090251.1Goodwin Ref: PRG-062WO binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO:341.

46. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 43; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO:342.

47. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

48. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

49. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.304IPTS / 200090251.1Goodwin Ref: PRG-062WO50. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 415; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

51. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 335; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 339.

52. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 336; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 340.

53. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 337; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 341.

54. The isolated antibodies of claim 29 or 30, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH sequence comprising the amino acid sequence set forth in SEQ ID NO: 34; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 421; and wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH sequence comprising the amino acid sequence set forth in305IPTS / 200090251.1Goodwin Ref: PRG-062WOSEQ ID NO: 338; and a VL sequence comprising the amino acid sequence set forth in SEQ ID NO: 342.

55. The isolated antibodies of any one of claims 1-54, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L is a humanized, human, or chimeric antibody.

56. The isolated antibodies of any one of claims 1-55, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L is a humanized antibody.

57. The isolated antibodies of any one of claims 1-56, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a heavy chain human constant region of a class selected from IgG, IgA, IgD, IgE, and IgM.

58. The isolated antibodies of any one of claims 1-57, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human Fc region, and wherein the human Fc region comprises a human heavy chain constant region of the class IgG and a subclass selected from IgGl, IgG2, IgG3, and IgG4.

59. The isolated antibodies of claim 58, wherein the human Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the human Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human IgGl Fc region.

60. The isolated antibodies of claim 58, wherein the human Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the human Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human IgG4 Fc region.

61. The isolated antibodies of claim 58, wherein the human Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the human Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L comprises a human IgG2 Fc region.

62. The isolated antibodies of any one claims 1-61, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a heavy chain comprising a constant heavy chain sequence selected from an amino acid sequence set forth in any one of SEQ ID NOs: 47-270.306IPTS / 200090251.1Goodwin Ref: PRG-062WO63. The isolated antibodies of any one of claims 1-62, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a light chain comprising a constant light chain sequence set forth in SEQ ID NO: 46 or SEQ ID NO: 453.

64. The isolated antibodies of any one of claims 1-62, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a light chain comprising a human lambda light chain constant region and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises a light chain comprising a human kappa light chain constant region.

65. The isolated antibodies of any one of claims 1-64, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises an Fc region comprising one or more amino acid substitutions, wherein the one or more amino acid substitutions result in an increase in one or more of antibody half-life, ADCC activity, ADCP activity, or CDC activity compared with the Fc without the one or more substitutions.

66. The isolated antibodies of any one of claims 1-64, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L comprises an Fc region comprising one or more amino acid substitutions, wherein the one or more amino acid substitutions result in a decrease in one or more of, ADCC activity, ADCP activity or CDC activity compared to an antibody comprising a wild-type Fc region.

67. The isolated antibodies of claim 65 or 66, wherein the one or more amino acid substitutions is selected from the group consisting of S228P, M252Y, S254T, T256E, T256D, T250Q, H285D, T307A, T307Q, T307R, T307W, L309D, Q411H, Q311V, A378V, E380A, M428L, N434A, N434S, N297A, D265A, L234A, L235A, and N434W; optionally, wherein the one or more amino acid substitutions comprises a plurality of amino acid substitutions selected from the group consisting of M428L / N434S (LS), M252Y / S254T / T256E (YTE), T250Q / M428L, T307A / E380A / N434A, T256D / T307Q (DQ), T256D / T307W (DW), M252Y / T256D (YD), T307Q / Q311V / A378V (QVV), T256D / H285D / T307R / Q311V / A378V (DDRVV), L309D / Q311H / N434S (DHS), S228P / L235E (SPLE), L234A / L235A (LALA), M428L / N434A (LA), L235A / G237A (LAGA), L234A / L235A / G237A (LALAGA), L234A / L235A / P329G (LALAPG), D265A / YTE, LALA / YTE, LAGA / YTE, LALAGA / YTE, LALAPG / YTE, N297A / LS, D265A / LS, LALA / LS, LALAGA / LS, LALAPG / LS, N297A / DHS, D265A / DHS, LALA / DHS, LAGA / DHS, LALAGA / DHS, LALAPG / DHS, SP / YTE,307IPTS / 200090251.1Goodwin Ref: PRG-062WOSPLE / YTE, SP / LS, SPLE / LS, SP / DHS, SPLE / DHS, N297A / LA, D265A / LA, LALA / LA, LAGA / LA, LALAGA / LA, LALAPG / LA, N297A / N434A, D265A / N434A, LALA / N434A, LAGA / N434A, LALAGA / N434A, LALAPG / N434A, N297A / N434W, D265A / N434W, LALA / N434W, LAGA / N434W, LALAGA / N434W, LALAPG / N434W, N297A / DQ, D265A / DQ, LALA / DQ, LAGA / DQ, LALAGA / DQ, LALAPG / DQ, N297A / DW, D265A / DW, LALA / DW, LAGA / DW, LALAGA / DW, LALAPG / DW, N297A / YD, D265A / YD, LALA / YD, LAGA / YD, LALAGA / YD, LALAPG / YD, T307Q / Q311V / A378V (QVV), N297A / QVV, D265A / QVV, LALA / QVV, LAGA / QVV, LALAGA / QVV, LALAPG / QVV, DDRVV, N297A / DDRVV, D265A / DDRVV, LALA / DDRVV, LAGA / DDRVV, LALAGA / DDRVV, and LALAPG / DDRVV.

68. The isolated antibodies of any one of claims 1-67, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises a VH domain comprising the amino acid sequence set forth in SEQ ID NO: 34, a VL domain comprising the amino acid sequence set forth in SEQ ID NO: 41, a constant heavy chain sequence set forth in SEQ ID NO: 173 or SEQ ID NO: 61, and a constant light chain sequence set forth in SEQ ID NO: 453.

69. The isolated antibodies of any one of claims 1-68, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises a VH domain comprising the amino acid sequence set forth in SEQ ID NO: 335, a VL domain comprising the amino acid sequence set forth in SEQ ID NO: 339, a constant heavy chain sequence set forth in SEQ ID NO: 173 or SEQ ID NO: 61, and a constant light chain sequence set forth in SEQ ID NO: 46.

70. The isolated antibodies of any one of claims 57-69, wherein the Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L binds to Neonatal Fc receptor (FcRn).

71. The isolated antibodies of claim 70, wherein the Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L binds an FcRn with higher affinity at pH 6.0 compared to an antibody comprising a wild-type Fc region.

72. The isolated antibodies of claim 70 or 71, wherein the Fc region of the antibody, or antigen binding fragment thereof, that binds TSLP and / or the Fc region of the antibody, or antigen binding fragment thereof, that binds OX40L binds to FcRn with a KD of <1 x 10'7M at pH 6.0.308IPTS / 200090251.1Goodwin Ref: PRG-062WO73. The isolated antibodies of any one of claims 1-72, wherein the antibody, or antigen binding fragment thereof, that binds TSLP and / or the antibody, or antigen binding fragment thereof, that binds OX40L is a monoclonal antibody.

74. The isolated antibodies of any one of claims 1-73, wherein the antibody, or antigen binding fragment thereof, that binds TSLP binds a TSLP sequence set forth in the amino acid sequence of any one of SEQ ID NOs: 271-272.

75. The isolated antibodies of any one of claims 1-74, wherein the antibody, or antigen binding fragment thereof, that binds OX40L binds an OX40L sequence set forth in the amino acid sequence of SEQ ID NO: 439.

76. The isolated antibodies of any one of claims 1-75 for use in the treatment of an inflammatory disorder or disease.

77. The isolated antibodies of claim 76, for use in the treatment of atopic dermatitis (AD).

78. The isolated antibodies of claim 77, wherein the treatment reduces disease severity in a patient and wherein disease severity is assessed by an atopic dermatitis disease severity outcome measure.

79. The isolated antibodies of claim 76, for use in the treatment of asthma, chronic sinusitis with nasal polyps; Chronic Rhinosinusitis without Nasal Polyps (CRSsNP); eosinophilic esophagitis (EoE); an Eosinophilic gastrointestinal disorder or disease (EGID) selected from the group consisting of Eosinophilic Gastritis (EoG), Eosinophilic Enteritis (EoN), Eosinophilic Colitis (EoC), and Eosinophilic Gastroenteritis (EGE); Churg-Strauss syndrome / Eosinophilic granulomatosis with polyangiitis (EGPA); Prurigo Nodularis (PN); Chronic Spontaneous Urticaria (CSU); Chronic Pruritis of Unknown Origin (CPUO); Bullous Pemphigoid (BP); Cold Inducible Urticaria (ColdU); Allergic Fungal Rhinosinusitis (AFRS); Allergic Bronchopulmonary Aspergillosis (ABPA); Chronic Obstructive Pulmonary Disease (COPD); Crohn’s disease; lupus; rheumatoid arthritis (RA); psoriasis; ulcerative colitis; hi dradenitis suppurativa; celiac disease; idiopathic pulmonary fibrosis; alopecia areata; or systemic sclerosis.

80. An isolated polynucleotide or set of polynucleotides encoding the isolated antibodies of any one of claims 1-75, a VH thereof, a VL thereof, a light chain thereof, a heavy chain thereof, or an antigen-binding portion thereof, and optionally, wherein the polynucleotide or set of polynucleotides comprises cDNA.

81. A vector or set of vectors comprising the polynucleotide or set of polynucleotides of claim 80.309IPTS / 200090251.1Goodwin Ref: PRG-062WO82. A host cell comprising the polynucleotide or set of polynucleotides of claim 80 or the vector or set of vectors of claim 81.

83. A method of producing one or more of the isolated antibodies of any one of claims 1-75, the method comprising expressing one or more of the antibodies within the host cell of claim 82 and isolating the one or more expressed antibodies.

84. A pharmaceutical composition comprising the isolated antibodies of any one of claims 1- 69 and a pharmaceutically acceptable excipient.

85. A kit comprising the isolated antibodies of any one of claims 1-75 or the pharmaceutical composition of claim 84 and instructions for use.

86. A method for treating an inflammatory disorder or disease in a mammalian subject in need thereof, the method comprising administering to the mammalian subject a therapeutically effective amount of the isolated antibodies of any one of claims 1-75; a therapeutically effective amount of the pharmaceutical composition of claim 84; or a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds TSLP and a pharmaceutically acceptable excipient and a therapeutically effective amount of a pharmaceutical composition comprising an antibody, or antigen binding fragment thereof, that binds OX40L and a pharmaceutically acceptable excipient.

87. The method of claim 86, wherein the mammalian subject is a human.

88. The method of claim 86 or 87, wherein the inflammatory disorder or disease is atopic dermatitis.

89. The method of claim 86 or 87, wherein the inflammatory disorder or disease is asthma.

90. The method of claim 86 or 87, wherein the inflammatory disorder or disease is chronic sinusitis with nasal polyps; Chronic Rhinosinusitis without Nasal Polyps (CRSsNP); eosinophilic esophagitis (EoE); an Eosinophilic gastrointestinal disorder or disease (EGID) selected from the group consisting of Eosinophilic Gastritis (EoG), Eosinophilic Enteritis (EoN), Eosinophilic Colitis (EoC), and Eosinophilic Gastroenteritis (EGE); Churg-Strauss syndrome / Eosinophilic granulomatosis with polyangiitis (EGPA); Prurigo Nodularis (PN); Chronic Spontaneous Urticaria (CSU); Chronic Pruritis of Unknown Origin (CPUO); Bullous Pemphigoid (BP); Cold Inducible Urticaria (ColdU); Allergic Fungal Rhinosinusitis (AFRS); Allergic Bronchopulmonary Aspergillosis (ABPA); Chronic Obstructive Pulmonary Disease (COPD); Crohn’s disease; lupus; rheumatoid arthritis (RA); psoriasis; ulcerative colitis;310IPTS / 200090251.1Goodwin Ref: PRG-062WO hidradenitis suppurativa; idiopathic pulmonary fibrosis; alopecia areata; systemic sclerosis; or celiac disease.

91. A method for treating a pathology associated with elevated levels of TSLP and / or OX40L in a mammalian subject in need thereof, the method comprising administering to the mammalian subject a therapeutically effective amount of the isolated antibodies of any one of claims 1-75; a therapeutically effective amount of the pharmaceutical composition of claim 84; or a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds TSLP and a pharmaceutically acceptable excipient and a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds OX40L and a pharmaceutically acceptable excipient.

92. A method of reducing biological activity of TSLP and / or OX40L in a mammalian subject in need thereof, the method comprising administering to the mammalian subject a therapeutically effective amount the isolated antibodies of any one of claims 1-75; a therapeutically effective amount of the pharmaceutical composition of claim 84; or a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds TSLP and a pharmaceutically acceptable excipient and a therapeutically effective amount of a pharmaceutical composition comprising an isolated antibody, or antigen binding fragment thereof, that binds OX40L and a pharmaceutically acceptable excipient.

93. The method of any one of claims 86-92, wherein the mammalian subject is a human.

94. An isolated antibody, or antigen binding fragment thereof, that binds TSLP, comprising: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR- H3; and b) a VL chain sequence having three light chain CDR sequences, CDR-L1, CDR-L2, and CDR-L3, wherein the antibody, or antigen binding fragment thereof, that binds TSLP comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 3, 6, and 9; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 10, 11, and 12; a CORED comprising the sequence set forth in any one of SEQ ID NOs: 13 and 16; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 21 and 24; a CDR-L2 comprising the sequence set forth in SEQ ID NO: 26 or the amino acid sequence DDS; and a CDR-L3 comprising the sequence set forth in SEQ ID NO: 27; and311IPTS / 200090251.1Goodwin Ref: PRG-062WO an isolated antibody, or antigen binding fragment thereof, that binds OX40L, comprising: a) a VH chain sequence having three heavy chain CDR sequences, CDR-H1, CDR-H2, and CDR-H3; and b) a VL chain sequence having three light chain CDR sequences, CDR-L1, CDR- L2, and CDR-L3, wherein the antibody, or antigen binding fragment thereof, that binds OX40L comprises:(i) a CDR-H1 comprising the sequence set forth in any one of SEQ ID NOs: 273, 274, and 275; a CDR-H2 comprising the sequence set forth in any one of SEQ ID NOs: 285, 286, and 287; a CDR-H3 comprising the sequence set forth in any one of SEQ ID NOs: 297, 298, and 299; a CDR-L1 comprising the sequence set forth in any one of SEQ ID NOs: 309, 310, and 311; a CDR-L2 comprising the sequence set forth in any one of SEQ ID NOs: 319 or the amino acid sequence ASS; and a CDR-L3 comprising the sequence set forth in any one of SEQ ID NOs: 327 and 328, wherein the isolated antibody, or antigen binding fragment thereof, that binds TSLP and / or the isolated antibody, or antigen binding fragment thereof, that binds OX40L comprises a heavy chain comprising a heavy chain constant region having a means for extending the half-life of the isolated antibody.312IPTS / 200090251.1