Multispecific antibodies and methods of use thereof
Multispecific antibodies targeting cMet, Trop2, and CD3 with defined CDR sequences address on-target, off-tumor toxicity, enhancing cancer treatment efficacy by activating cytotoxic T cells only in the tumor microenvironment.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MODEX THERAPEUTICS INC
- Filing Date
- 2025-11-04
- Publication Date
- 2026-05-07
AI Technical Summary
Bispecific T cell engager antibodies for cancer treatment face challenges with on-target, off-tumor toxicity due to binding to normal tissues, limiting their therapeutic potential, as few solid tumor antigens are exclusively specific to tumors.
Development of multispecific antibodies that specifically bind to cMet, Trop2, and CD3, with defined CDR sequences, to activate cytotoxic T cells only in proximity to tumor cells, reducing off-tumor toxicity.
The multispecific antibodies effectively mediate tumor cell lysis and induce cytokine release, demonstrating reduced side effects and enhanced therapeutic efficacy against solid cancers.
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Figure PCTCN2025132433-FTAPPB-I100001 
Figure PCTCN2025132433-FTAPPB-I100002 
Figure PCTCN2025132433-FTAPPB-I100003
Abstract
Description
MULTISPECIFIC ANTIBODIES AND METHODS OF USE THEREOFCROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to US Provisional Application No. 63 / 874,452, filed on September 2, 2025, US Provisional Application No. 63 / 814,853, filed on May 30, 2025, and US Provisional Application No. 63 / 716,154, filed on November 4, 2024, each of which is hereby incorporated by reference in its entirety.FIELD
[0002] The present disclosure relates to the use of multispecific antibodies or antigen binding fragments thereof that specifically bind to cMet, Trop2, CD28, and CD3 (e.g., TM62, a tetraspecific antibody) , and methods of administering such multispecific antibodies or antigen binding fragments thereof for the treatment of human cancers, e.g., solid cancers.BACKGROUND
[0003] Cancer immunotherapy has seen tremendous progress in the past few decades. Recent developments include T cell engagers. Bispecific T cell engagers are antibodies that recognize antigens expressed on target tumor cells and simultaneously engage the CD3 subunit of the T cell receptor on cytotoxic T cells, serving as an artificial immune synapse to mediate tumor cell lysis by the cytotoxic T cells.
[0004] While bispecific T cell engager antibodies show high anti-tumor potency, they are also associated with strong side effects, particularly the cytokine release syndrome (CRS) associated with on-target, off-tumor toxicity for solid tumor targets, which can limit the therapeutic potential of these antibodies. On-target, off-tumor toxicity occurs when bispecific T cell engager antibodies bind to cancer antigens expressed on cells found in normal, non-cancerous tissue in addition to cancer antigens expressed on cancerous cells, thereby recruiting cytotoxic T cells to normal tissue and causing damage to the normal tissue. Because few solid tumor antigens are exclusively specific to tumors, such toxicity poses a great challenge for cancer immunotherapy using bispecific T cell or natural killer (NK) cell engagers.
[0005] Thus, there is a need for T cell engagers, e.g., multispecific antibodies and antigen binding fragments thereof that specifically bind target molecules or combinations of target molecules and activate cytotoxic T cells only when in close proximity to tumor cells or within the tumor microenvironment, and avoid the strong side effects currently associated with high anti-tumor potency. The present disclosure provides such multispecific antibodies and antigen binding fragments thereof and beneficial methods of administration. BRIEF SUMMARY
[0006] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 comprising: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 24. In some aspects, such multispecific antibodies or antigen binding fragments thereof have a binding pattern to human CD3, CD28, c-MET and TROP-2 antigens as shown in at least one of FIGS. 2A-2E. In some aspects, such multispecific antibodies or antigen binding fragments thereof have a binding pattern to FcγRs as shown on FIG. 3. In other aspects, such multispecific antibodies or antigen binding fragments thereof bind to human FcRn at pH 6.0 and / or pH 7.4 as shown on FIG. 5. In some aspects, such multispecific antibodies or antigen binding fragments thereof cause T Cell mediated lung tumor cell lysis as shown in FIG. 7. In some aspects, such multispecific antibodies or antibody binding fragments thereof cause T cell mediated breast tumor cell lysis as shown in FIG. 8. In some aspects, such multispecific antibodies and antigen binding fragments thereof cause PBMC mediated cytokine release in the presence of breast tumor cell lines as shown in FIGs. 9 and 10. In some aspects, such multispecific antibodies and antigen binding fragments thereof cause PBMC mediated cytokine release in the presence of small cell lung tumor cell lines as shown in FIG. 11. In some aspects, the multispecific antibodies recited herein mediate cytokine release in PBMCs in the absence of target tumor cells as shown in FIG. 15. In some aspects, the recited multispecific antibodies at a concentration range in ng / mL of about 0.0 to about 10,000 ng / mL show lack of neutrophil binding, red blood cell binding and platelet binding as shown in FIGs. 16-18.
[0007] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof, wherein: (a) the VL1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and the VH1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) the VL2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and the VH2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) the VL3 that specifically binds to CD28 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) the VL4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and the VH4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0008] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 comprising: (a) a variable light chain region (VL1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 25; and a variable heavy chain region (VH1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 32.
[0009] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof wherein: (a) the VL1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and the VH1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) the VL2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and the VH2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) the VL3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) the VL4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and the VH4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0010] In some aspects, the multispecific antibody or antigen binding fragment thereof is a full-length antibody.
[0011] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises an immunoglobulin G1 (IgG1) Fc.
[0012] In some aspects, the multispecific antibody or antigen binding fragment thereof has a knob-into-hole (KIH) structure in a Fc region.
[0013] In some aspects, the knob side of the Fc region of the multispecific antibody or antigen binding fragment thereof comprises the amino acid sequence of SEQ ID NO: 45.
[0014] In some aspects, the hole side of the Fc region of the multispecific antibody or antigen binding fragment thereof comprises the amino acid sequence of SEQ ID NO: 46.
[0015] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises an antigen binding fragment.
[0016] In some aspects, the multispecific antibody or antigen binding fragment thereof has reduced Fc effector function.
[0017] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof which binds to cMet with a Kd of about 1.0 nM to about 10 nM.
[0018] In some aspects, the multispecific antibody or antigen binding fragment thereof binds to Trop2 with a Kd of about 30 nM to about 50 nM.
[0019] In some aspects, the multispecific antibody or antigen binding fragment thereof binds to CD28 with a Kd of about 10 nM to about 20 nM.
[0020] In some aspects, the multispecific antibody or antigen binding fragment thereof binds to CD3 with a Kd of about 10 nM to about 30 nM.
[0021] In some aspects, provided herein is a nucleic acid encoding the multispecific antibody or antigen binding fragment thereof described herein. In some aspects, provided herein is a nucleic acid expression vector comprising the nucleic acid described herein. In some aspects, provided herein is a host cell comprising the nucleic acid expression vector described herein.
[0022] In some aspects, provided herein is a pharmaceutical composition comprising the multispecific antibody or antigen binding fragment described herein, the nucleic acid described herein, the nucleic acid expression vector of described herein, and / or the host cell described herein, and a pharmaceutically acceptable carrier.
[0023] In some aspects, provided herein is a pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof described herein and at least one pharmaceutically acceptable carrier.
[0024] In some aspects, provided herein is a pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof described herein and a buffer. In some aspects, the pharmaceutical composition further comprises: histidine; sucrose; methionine, and polysorbate 80.
[0025] In some aspects, provided herein is a pharmaceutical kit comprising the multispecific antibody or antigen binding fragment thereof described herein, and instructions for use thereof.
[0026] In some aspects, provided herein is a pharmaceutical kit comprising the pharmaceutical composition described herein, and instructions for use thereof.
[0027] In some aspects, provided herein is a method of making the multispecific antibody or antigen binding fragment thereof described herein, comprising (a) culturing a cell expressing the multispecific antibody or antigen binding fragment thereof; and (b) isolating the antibody or fragment from the cultured cell. In some aspects, the cell is a eukaryotic cell. In some aspects, the cell is a Chinese hamster ovary (CHO) cell.
[0028] In some aspects, provided herein is a method for treating a cancer in a human subject, the method comprising administering to the subject a multispecific antibody or antigen binding fragment thereof, wherein the multispecific antibody or antigen binding fragment thereof is administered at a dose of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.
[0029] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of 0.0003 to about 0.0005 mg / kg of body weight of the subject.
[0030] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject.
[0031] In some aspects, the starting dose of the multispecific antibody or antigen binding fragment thereof can be increased to a therapeutically effective dose of from about 0.0005 mg / kg to about 1.6 mg / kg of body weight of the subject.
[0032] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a dose of about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of body weight of the subject.
[0033] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered intravenously. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered as an intravenous infusion.
[0034] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject in a 28-day treatment cycle.
[0035] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle.
[0036] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and day 15 of the 28-day treatment cycle.
[0037] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject three times within a treatment cycle.
[0038] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, day 8, and day 15 of a 28-day treatment cycle.
[0039] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject four times within a treatment cycle.
[0040] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, day 4, day 8, and day 15 of a 28-day treatment cycle.
[0041] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for one treatment cycle.
[0042] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for more than one treatment cycle.
[0043] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for at least 2 treatment cycles, at least 3 treatment cycles, at least 4 treatment cycles, at least 5 treatment cycles, at least 6 treatment cycles, at least 7 treatment cycles, at least 8 treatment cycles, at least 9 treatment cycles, or at least 10 treatment cycles.
[0044] In some aspects, the cancer is a solid cancer. In some aspects, the cancer is breast cancer, lung cancer, non-small cell lung cancer, esophageal cancer, thyroid cancer, head and neck cancer, bile duct cancer, biliary tract cancer, kidney cancer, gastric cancer, gastroesophageal junction cancer, prostate cancer, cervical cancer, endometrial cancer, bladder cancer, uterine cancer, stomach cancer, rectal cancer, colon cancer, liver cancer, urothelial cancer, renal cancer, hepatocellular cancer, or pancreatic cancer.
[0045] In some aspects, the cancer is lung cancer.
[0046] In some aspects, the cancer is breast cancer.
[0047] In some aspects, the cancer is gastric cancer.
[0048] In some aspects, the cancer is prostate cancer.
[0049] In some aspects, the cancer is a hematological cancer. In some aspects, the hematological cancer is leukemia or lymphoma. In some aspects, the leukemia or lymphoma is B cell leukemia, B cell lymphoma, diffuse large B-cell lymphoma (DLBCL) Follicular lymphoma, Chronic lymphocytic leukemia (CLL) / small lymphocytic lymphoma (SLL) , Mantle cell lymphoma (MCL) , Burkitt lymphoma, Lymphoplasmacytic lymphoma (Waldenstrom macroglobulinemia) , prolymphocytic leukemia (PLL) , or hairy cell leukemia (HCL) .
[0050] In some aspects of the methods provided herein, the multispecific antibody or antigen binding fragment thereof comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0051] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises: (a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and VH1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0052] In some aspects, the multispecific antibody or antigen binding fragment thereof is a full-length antibody comprising an immunoglobulin G1 (IgG1) Fc.
[0053] In some aspects, the multispecific antibody or antigen binding fragment thereof has a knob-into-hole (KIH) structure in an Fc region. In some aspects, the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45 and the hole side of the Fc region comprises the amino acid sequence of SEQ ID NO: 46.
[0054] In some aspects, the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.
[0055] In some aspects of the methods provided herein, the administration results in a decrease in the number of cancer cells in the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against lung cancer cells. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against breast cancer cells. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against gastric cancer cells. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against prostate cancer cells.
[0056] In some aspects of the methods provided herein, the administration of the multispecific antibody or antigen binding fragment thereof induces in vitro cytokine release in the presence of target cancer cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of interleukin (IL) -6 in vitro in the presence of target cancer cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of interferon gamma (IFN-γ) in vitro in the presence of target cancer cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of tumor necrosis factor alpha (TNF-α) in vitro in the presence of target cancer cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of IL-2 in vitro in the presence of target cancer cells.
[0057] In some aspects, provided herein is a method of inhibiting tumor growth in a human subject, the method comprising administering a therapeutically effective amount of a multispecific antibody or antigen binding fragment thereof to the subject, wherein the multispecific antibody or antigen binding fragment thereof is administered as an intravenous infusion every two weeks, in a 28-day treatment cycle, at a dose of about of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.
[0058] In some aspects, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.
[0059] In some aspects of the methods provided herein, the first administration is on day 1 of the first 28-day treatment cycle and the second administration is on day 15 of the first 28-day treatment cycle.
[0060] In some aspects of the methods provided herein, the first administration is on day 1 of the first 28-day treatment cycle, the second administration is on day 8 of the first 28-day treatment cycle, and the third administration is on day 15 of the first 28-day treatment cycle.
[0061] In some aspects of the methods provided herein, the first administration is on day 1 of the first 28-day treatment cycle, the second administration is on day 4 of the first 28-day treatment cycle, the third administration is on day 8 of the first 28-day treatment cycle, and the fourth administration is on day 15 of the first 28-day treatment cycle.
[0062] In some aspects of the methods provided herein, the multispecific antibody or antigen binding fragment thereof is administered for more than one treatment cycle.
[0063] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for at least 2 treatment cycles, at least 3 treatment cycles, at least 4 treatment cycles, at least 5 treatment cycles, at least 6 treatment cycles, at least 7 treatment cycles, at least 8 treatment cycles, at least 9 treatment cycles, or at least 10 treatment cycles.
[0064] In some aspects of the methods provided herein, the tumor is a breast tumor, a lung tumor, a non-small cell lung tumor, an esophageal tumor, a thyroid tumor, a head and neck tumor, a bile duct tumor, a biliary tract tumor, a kidney tumor, a gastric tumor, a gastroesophageal junction tumor, a prostate tumor, a cervical tumor, an endometrial tumor, a bladder tumor, a uterine tumor, a stomach tumor, a rectal tumor, a colon tumor, a liver tumor, a urothelial tumor, a renal tumor, a hepatocellular tumor, or a pancreatic tumor.
[0065] In some aspects, the tumor is a lung tumor.
[0066] In some aspects, the tumor is a breast tumor.
[0067] In some aspects, the tumor is a gastric tumor.
[0068] In some aspects, the tumor is a prostate tumor.
[0069] In some aspects of the methods provided herein, the multispecific antibody or antigen binding fragment thereof comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0070] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises: (a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and a VH1 that specifically binds to cMet comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0071] In some aspects, the multispecific antibody or antigen binding fragment is a full-length antibody that has a knob-into-hole (KIH) structure in an Fc region, wherein the knob side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 45, and the hole side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 46.
[0072] In some aspects, the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.
[0073] In some aspects, the administration results in a decrease in tumor size. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against lung tumors. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against breast tumors. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against gastric tumors. In some aspects, the multispecific antibody or antigen binding fragment thereof is cytotoxic against prostate tumors.
[0074] In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces in vitro cytokine release in the presence of target tumor cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of interleukin (IL) -6 in vitro in the presence of target tumor cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of interferon gamma (IFN-γ) in vitro in the presence of target tumor cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of tumor necrosis factor alpha (TNF-α) in vitro in the presence of target tumor cells. In some aspects, administration of the multispecific antibody or antigen binding fragment thereof induces release of IL-2 in vitro in the presence of target tumor cells.
[0075] In some aspects, provided herein is a method for treating a tumor in a human subject, the method comprising administering to the subject a starting dose of a multispecific antibody or antigen binding fragment thereof, wherein the starting dose is based on the 20%effective concentration (EC20) of IFNγ release in vitro, following administration of the multispecific antibody or antigen binding fragment thereof.
[0076] In some aspects, the starting dose is about 0.1 μg / kg, about 0.2 μg / kg, about 0.3 μg / kg, about 0.4 μg / kg, about 0.5 μg / kg, about 0.6 μg / kg, 0.7 μg / kg, about 0.8 μg / kg, about 0.9 μg / kg, about 1.0 μg / kg, about 1.1 μg / kg, about 1.2 μg / kg, about 1.3 μg / kg, about 1.4 μg / kg, about 1.5 μg / kg, about 1.6 μg / kg, about 1.7 μg / kg, about 1.8 μg / kg, about 1.9 μg / kg, about 2.0 μg / kg, about 2.1 μg / kg, about 2.2 μg / kg, about 2.3 μg / kg, about 2.4 μg / kg, about 2.5 μg / kg, about 2.6 μg / kg, about 2.7 μg / kg, about 2.8 μg / kg, about 2.9 μg / kg, about 3.0 μg / kg, about 3.1 μg / kg, about 3.2 μg / kg, about 3.3 μg / kg, about 3.4 μg / kg, about 3.5 μg / kg, about 3.6 μg / kg, about 3.7 μg / kg, about 3.8 μg / kg, about 3.9 μg / kg, about 4.0 μg / kg, about 4.1 μg / kg, about 4.2 μg / kg, about 4.3 μg / kg, about 4.4 μg / kg, about 4.5 μg / kg, about 4.6 μg / kg, about 4.7 μg / kg, about 4.8 μg / kg, about 4.9 μg / kg, or about 5.0 μg / kg. In some aspects, the starting dose is about 0.4 μg / kg.
[0077] In some aspects, provided herein is a method for treating a tumor in a human subject, the method comprising administering to the subject a therapeutically effective dose of a multispecific antibody or antigen binding fragment thereof, wherein the therapeutically effective dose is based on the 90%effective concentration (EC90) of cell lysis activity in vitro, following administration of the multispecific antibody or antigen binding fragment thereof.
[0078] In some aspects of the methods provided herein, the therapeutically effective dose is about 1,200 μg / kg, about 1,205 μg / kg about 1,210 μg / kg, about 1,220 μg / kg, about 1,230 μg / kg, about 1,240 μg / kg, about 1,250 μg / kg, about 1,260 μg / kg, about 1,270 μg / kg, about 1,280 μg / kg, about 1,290 μg / kg, about 1,300 μg / kg, about 1,310 μg / kg, about 1,320 μg / kg, about 1,330 μg / kg, about 1,340 μg / kg, about 1,350 μg / kg, about 1,360 μg / kg, about 1,370 μg / kg, about 1,380 μg / kg, about 1,390 μg / kg, about 1,400 μg / kg, about 1,410 μg / kg, about 1,420 μg / kg, about 1,430 μg / kg, about 1,440 μg / kg, about 1,450 μg / kg, about 1,460 μg / kg, about 1,470 μg / kg, about 1,480 μg / kg, about 1,490 μg / kg, about 1,500 μg / kg, about 1,510 μg / kg, about 1,520 μg / kg, about 1,530 μg / kg, about 1,540 μg / kg, about 1,550 μg / kg, about 1,560 μg / kg, about 1,570 μg / kg, about 1,580 μg / kg, about 1,590 μg / kg, or about 1,600 μg / kg. In some aspects, the therapeutically effective dose is about 1,205 μg / kg. In some aspects, the therapeutically effective dose is about 1,588 μg / kg.
[0079] In some aspects, antigen binding fragment thereof is administered to the human subject as an intravenous infusion every two weeks in a 28-day treatment cycle.
[0080] In some aspects, antigen binding fragment is a full-length antibody that has a knob-into-hole (KIH) structure in a Fc region, wherein the knob side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 45, and the hole side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 46.
[0081] In some aspects, binding fragment thereof has a reduced Fc effector function.
[0082] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 wherein the variable light chain region (VL1) that specifically binds to cMet comprises the CDR1 of SEQ ID NO: 50, the CDR2 of SEQ ID NO: 51 and the CDR3 of SEQ ID NO: 52, and the variable heavy chain region (VH1) that specifically binds to cMet comprises the CDR1 of SEQ ID NO: 47, the CDR2 of SEQ ID NO: 48, and the CDR3 of SEQ ID NO: 49.
[0083] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3, wherein the variable light chain region VL2 that specifically binds to Trop2 comprises the CDR1 of SEQ ID NO: 53, the CDR2 of SEQ ID NO: 54, and the CDR3 of SEQ ID NO: 55; and the VH2 that specifically binds to Trop2 comprises the CDR1 of SEQ ID NO: 56, the CDR2 of SEQ ID NO: 57, and the CDR3 of SEQ ID NO: 58.
[0084] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3, wherein the variable light chain region VL3 that specifically binds to CD28 comprises the CDR1 of SEQ ID NO: 59, the CDR2 of SEQ ID NO: 60, and the CDR3 of SEQ ID NO: 61.
[0085] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3, wherein the variable light chain region VL2 that specifically binds to CD3 comprises the CDR1 of SEQ ID NO: 62, the CDR2 of SEQ ID NO: 63, and the CDR3 of SEQ ID NO: 64; and the VH2 that specifically binds to Trop2 comprises the CDR1 of SEQ ID NO: 65, the CDR2 of SEQ ID NO: 66, and the CDR3 of SEQ ID NO: 67.
[0086] In some aspects, provided herein is a pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof of provided herein, and at least one pharmaceutically acceptable carrier.
[0087] In some aspects, provided herein is a method for treating a cancer in a human subject, the method comprising administering to the subject the multispecific antibody or antigen binding fragment thereof provided herein or the pharmaceutical composition provided herein, wherein the multispecific antibody or antigen binding fragment thereof or the pharmaceutical composition is administered at a dose of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.
[0088] In some aspects, provided herein is a method of inhibiting tumor growth in a human subject, the method comprising administering a therapeutically effective amount of a multispecific antibody or antigen binding fragment thereof provided herein or the pharmaceutical composition provided herein, to the subject, wherein the multispecific antibody or antigen binding fragment thereof or the pharmaceutical composition is administered as an intravenous infusion every two weeks, in a 28-day treatment cycle, at a dose of about of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.
[0089] In some aspects, provided herein is a method of making a pharmaceutical composition comprising a multispecific antibody or antigen binding fragment thereof described herein, the method comprising adding to a formulation comprising the multispecific antibody or antigen binding fragment thereof and a formulation buffer, a stock solution of 5% (w / w) polysorbate 80 (PS80) to adjust the PS80 concentration to 0.02% (w / v) and adding a stock solution of 200 mM (2.872%w / w) L-methionine to adjust the concentration of L-methionine to 10 mM.
[0090] In some aspects, the formulation buffer comprises 20 mM histidine buffer, 8% (w / v) Sucrose, 0.02% (w / v) PS80, 10 mM L-Methionine and has a pH of 5.2.
[0091] In some aspects, provided herein is a pharmaceutical composition comprising a multispecific antibody or antigen binding fragment thereof described herein in a concentration of from about 0.1 mg / mL to about 50 mg / mL, histidine buffer or acetate buffer in a concentration of from about 5 mM to about 25 mM, sucrose in a concentration of from about 10% (w / v) to about 50% (w / v) , surfactant in a concentration of from about 1% (w / v) to about 10% (w / v) , and L-Methionine in a concentration of from about 1 mM to about 100 mM, wherein the pH is in a range of from about 5 to about 6.
[0092] In some aspects, provided herein is a pharmaceutical composition comprising a multispecific antibody or antigen binding fragment thereof described herein in a concentration of from about 0.5 mg / mL to about 1.5 mg / mL, histidine buffer or acetate buffer in a concentration of from about 15 mM to about 25 mM, sucrose in a concentration of from about . 01% (w / v) to about 10% (w / v) , surfactant in a concentration of from about 1% (w / v) to about 10% (w / v) , and L-Methionine in a concentration of from about 5 mM to about 15 mM, wherein the pH is in a range of from about 5.1 to about 5.5.
[0093] In some aspects, provided herein is a pharmaceutical composition comprising a multispecific antibody or antigen binding fragment thereof described herein in a concentration of about 1 mg / mL, histidine buffer in a concentration of about 20 mM, sucrose in a concentration of about 8% (w / v) , PS80 in a concentration of about . 02% (w / v) , and L-Methionine in a concentration of about 10 mM, wherein the pH is about 5.2.
[0094] In some aspects, provided herein is a lyophilized pharmaceutical composition comprising a multispecific antibody or antigen binding fragment thereof described herein in a concentration of about 1 mg / mL, histidine buffer in a concentration of about 20 mM, sucrose in a concentration of about 8% (w / v) , PS80 in a concentration of about . 02% (w / v) , and L-Methionine in a concentration of about 10 mM, wherein the pH is about 5.2.
[0095] In some aspects, the pharmaceutical composition is lyophilized. In some aspects, the lyophilized pharmaceutical composition can be reconstituted with water for injection (WFI) . In some aspects, the reconstituted product can be diluted in normal saline to target dose levels per a pharmacy manual or final clinical protocol.
[0096] In some aspects, provided herein is a liquid formulation comprising a multispecific antibody or antigen binding fragment thereof described herein, and a pharmaceutically acceptable excipient.
[0097] In some aspects, provided herein is a stabilized composition comprising a lyophilized formulation comprising a multispecific antibody or antigen binding fragment thereof described herein and at least one excipient selected from a buffer.
[0098] In some aspects, provided herein is a stabilized lyophilized formulation for reconstitution comprising the multispecific antibody or antigen binding fragment thereof described herein, a buffer and a surfactant.
[0099] In some aspects, the pharmaceutical composition is administered parenterally. In some aspects, the parenteral administration is intramuscular, intravenous, subcutaneous, intradermal, or intraperitoneal.BRIEF DESCRIPTION OF THE DRAWINGS
[0100] FIG. 1 is a schematic of the structure of TM62, a tetraspecific T cell engager antibody that that recognizes four distinct antigens: cMet and TROP2 on certain human malignancies and CD3 and CD28 on human T cells.
[0101] FIGs. 2A-2E show the binding activity of TM62 to CD3, CD28, cMet, and Trop2 in human and animal models as indicated, analyzed by biolayer-interferometry (BLI) .
[0102] FIGs. 3A-3E show results of TM62 (2-fold titration from 1000 to 15.6 nM) binding to ligands FcγRIIIa (3A) , FcγRIIIb (3B) , FcγRIIa (3C) , FcγRIIb (3D) , or FcγRI (3E) , analyzed by BLI.
[0103] FIGs. 4A-4E show results of IgG control antibody (2-fold titration from 1000 to 15.6 nM) binding to ligands FcγRIIIa (4A) , FcγRIIIb (4B) , FcγRIIa (4C) , FcγRIIb (4D) , or FcγRI (4E) , analyzed by BLI.
[0104] FIGs. 5A-5B show TM62 binding to human neonatal Fc receptor (FcRn) at pH 6.0 (5A) and pH 7.4 (5B) , analyzed by BLI.
[0105] FIGs. 6A-6B show IgG1 positive control antibody binding to FcRn at pH 6.0 (6A) and pH 7.4 (6B) , analyzed by BLI.
[0106] FIG. 7 shows in vitro anti-tumor cytolytic activity of TM62 when combined with human peripheral blood mononuclear cells (PBMCs) in lung tumor cell lines, assessed by real-time cell analysis.
[0107] FIG. 8 shows in vitro anti-tumor cytolytic activity of TM62 when combined with PBMCs in breast tumor cell lines, assessed by real-time cell analysis.
[0108] FIGs. 9A-9H show TM62 and PBMC-mediated in vitro release of cytokines IL-6, IFN-gamma, IL-2 and TNFalpha in the presence of breast tumor cell line BT-20 when treated with TM62 or isotype control antibody, detected by multiplex cytokine analysis.
[0109] FIGs. 10A-10H show TM62 and PBMC-mediated in vitro release of cytokines IL-6, IFN-gamma, IL-2 and TNFalpha in the presence of breast tumor cell line HCC1143, detected by multiplex cytokine analysis.
[0110] FIGs. 11A-11H show TM62 and PBMC-mediated in vitro release of cytokines IL-6, IFN-gamma, IL-2 and TNFalpha in the presence of non-small cell lung tumor cell line (H1975) , detected by multiplex cytokine analysis.
[0111] FIG. 12 shows results of an anti-tumor efficacy study with TM62. Human T cells were treated with phosphate buffered saline (PBS) vehicle or TM62 (10 μg / mL) . The black arrows indicate dosing days. Tumor values were measured for 8 days. Mean tumor volume at Day 8 was compared between groups using unpaired t test: ***p<0.001.
[0112] FIGs. 13A-13B show upregulation of cytokines IFN-gamma, IL-2, IL-6, and TNFalpha in human PBMC cultures incubated with a CD28 superagonist antibody, a CD3null TM62, and a control antibody. The TM62 derivative exhibited no binding to CD3 while retaining the full binding activity to CD28, as analyzed by biolayer interferometry (Octet) .
[0113] FIG. 14 shows results of TM62-mediated T cell activation in the absence of target tumor cells in two donors, as measured by CD69 expression in CD2+ cells and assessed by flow cytometry.
[0114] FIGs. 15A-15B show results of TM62-mediated T cell activation in the absence of target tumor cells in two donors. FIG. 15A shows results for Donor I. FIG. 15B shows results for Donor B. T cell activation was determined by measuring supernatant cytokine levels. PBMCs co-incubated with TM62 showed no increase in IL-6, IFN-γ, or IL-2 cytokines across the two donors tested. Increased TNF-α was measured in supernatants at TM62 concentrations of 3, 125 pM from one donor and at 50,000 pM from the second donor.
[0115] FIG. 16 shows that TM62 does not have detectable binding to neutrophils isolated from human blood when tested at varying concentrations up to 100 nM, as measured by flow cytometry Biotin labeled anti-human CD15 (SSEA-1) antibody demonstrated dose-dependent binding to neutrophils, whereas biotin labeled human lgG1-LALA-PA (isotype control) and TM62 showed no binding to neutrophils.
[0116] FIG. 17 shows that TM62 does not have detectable binding to red blood cells (RBCs) isolated from human blood when tested at varying concentrations up to 100 nM, as measured by flow cytometry. Biotin labeled anti-human CD235ab antibody exhibited dose-dependent binding to RBCs, whereas biotin-labeled human IgGl-LALA-PA and TM62 did not bind to RBCs.
[0117] FIG. 18 shows that TM62 does not have detectable binding to red blood platelets isolated from human blood when tested at varying concentrations up to 100 nM, as measured by flow cytometry APC-Cy7 anti-human CD41 antibody exhibited dose-dependent binding to platelets, whereas biotin-labeled human IgG1-LALA-PA and TM62 did not bind to platelets.
[0118] FIG. 19 shows the computational modular platform of TM62 as disclosed herein. As shown, TM62 consists of 2 arms, each containing 1 TAA-binding Fab and one T cell-binding Fab. Drug-mediated immunological synapse formation is a multi-step process that initiates when the molecule binds to any one of its 4 targets. Subsequent binding to a second target on the complementary cell type results in an inter-cellular molecular crosslink that promotes synapse development, cytokine release and destruction of the target cell. The model additionally captures bivalent binding to CD3 and CD28 on the same T cell.
[0119] FIGS. 20A and 20B show a single model that was used to capture the relationship between drug binding and cytolytic (20A) and cytokine-release activity (20B) . These were modeled as monotonically increasing functions of the number of cross-linked molecular bridges per T cell. Parameter values for cell killing and cytokine release functions were determined by fitting the model to fixed-endpoint in vitro data using multiple tumor cell lines and T cell donors.
[0120] FIG. 21 is a graph of the pharmacokinetic (PK) parameters for the clinical model allometrically scaled from parameters that fit a 2-compartment preclinical PK model.
[0121] FIGS. 22A and 22B are graphic representations of a 3-compartment human model developed and assigned parameters from clinical literature and from preclinical fits. As shown, a range of IV doses was simulated to assess efficacy and safety.
[0122] FIGS. 23A and 23B are graphic representations of using both “cross-cell bridging complex-based” metrics as well as exposure-based approaches for evaluating safety with regard to cytokine release. This approach justified a higher EC10 of IFNγ release in the human model.
[0123] FIG. 24 provides the efficacious dose with cytotoxicity using the EC90 of in vitro cell killing activity in the tumor to inform potential efficacious doses in the human model.
[0124] FIG. 25 is a graphic representation of the clinical trial study design.
[0125] FIG. 26 is a graph showing the data summary of the SE-HPLC testing of formulations in both liquid and lyophilized conditions, according to aspects of the disclosure.
[0126] FIG. 27 is a graphic representation of the downstream purification process overview.
[0127] FIG. 28 is a clarification process flow diagram.
[0128] FIG. 29 is an affinity chromatography process flow diagram.
[0129] FIG. 30 is a process flow diagram of cation exchange chromatography (CEX) in bind-and-elute mode.
[0130] FIG. 31 is a process flow diagram of Mixed-Mode Chromatography (MMC) in flow-through mode.
[0131] FIG. 32 is a process flow diagram of viral filtration.
[0132] FIG. 33 is a process flow diagram of ultrafiltration / diafiltration.DETAILED DESCRIPTION
[0133] The disclosure is directed to multispecific antibodies or antigen binding fragments thereof that specifically binds to cMet, Trop2, CD28, and CD3 (e.g., TM62, a tetraspecific antibody) , and methods of administering such multispecific antibodies or antigen binding fragments thereof.
[0134] Various terms relating to aspects of disclosure are used throughout the specification and claims. Such terms are to be given their ordinary meaning in the art, unless otherwise indicated. Other specifically defined terms are to be construed in a manner consistent with the definition provided herein. Definitions
[0135] The term "antibody" includes, without limitation, a glycoprotein immunoglobulin which binds specifically to an antigen and comprises at least two heavy (H) chains and two light (L) chains interconnected by disulfide bonds. Each H chain comprises a heavy chain variable region (abbreviated herein as VH) and a heavy chain constant region. The heavy chain constant region comprises three constant domains, CH1, CH2 and CH3. Each L chain comprises a light chain variable region (abbreviated herein as VL) and a light chain constant region. The light chain constant region comprises one constant domain, CL. The VH and VL regions can be further subdivided into regions of hypervariability, termed complementarity determining regions (CDRs) , interspersed with regions that are more conserved, termed framework regions (FR) . Each VH and VL comprises three CDRs and four FRs, arranged from amino-terminus to carboxy-terminus in the following order: FR1, CDR1, FR2, CDR2, FR3, CDR3, FR4. The variable regions of the heavy and light chains contain a binding domain that interacts with an antigen. The constant regions of the antibodies may mediate the binding of the immunoglobulin to host tissues or factors, including various cells of the immune system (e.g., effector cells) and the first component (C1q) of the classical complement system. A heavy chain may have the C-terminal lysine or not. Unless specified otherwise herein, the amino acids in the variable regions are numbered using the Kabat numbering system and those in the constant regions are numbered using the EU system.
[0136] The term "monoclonal antibody, " as used herein, refers to an antibody that is produced by a single clone of B-cells and binds to the same epitope. In contrast, the term "polyclonal antibody" refers to a population of antibodies that are produced by different B-cells and bind to different epitopes of the same antigen. The term "antibody" includes, by way of example, monoclonal and polyclonal antibodies; chimeric and humanized antibodies; human or non-human antibodies; wholly synthetic antibodies; and single chain antibodies. A non-human antibody can be humanized by recombinant methods to reduce its immunogenicity in man.
[0137] The antibody can be an antibody that has been altered (e.g., by mutation, deletion, substitution, conjugation to a non-antibody moiety) . For example, an antibody can include one or more variant amino acids (compared to a naturally occurring antibody) which change a property (e.g., a functional property) of the antibody. For example, several such alterations are known in the art, which affect, e.g., half-life, effector function, and / or immune responses to the antibody in a patient. The term antibody also includes artificial polypeptide constructs, which comprise at least one antibody-derived antigen binding site.
[0138] An "antigen binding fragment" refers to one or more fragments or portions of an antibody that retain the ability to bind specifically to the antigen bound by the whole antibody. It has been shown that the antigen binding function of an antibody can be performed by fragments or portions of a full-length antibody. An antigen binding fragment can contain the antigenic determining regions of an intact antibody (e.g., the complementarity determining regions (CDRs) ) . Examples of antigen binding fragments of antibodies include, but are not limited to, Fab, Fab', F (ab') 2, and Fv fragments, linear antibodies, and single chain antibodies. An antigen binding fragment of an antibody can be derived from any animal species, such as rodents (e.g., mouse, rat, or hamster) and humans or can be artificially produced.
[0139] Furthermore, although the two domains of the Fv fragment, VL and VH, are coded for by separate genes, they can be joined, using recombinant methods, by a synthetic linker that enables them to be made as a single protein chain in which the VL and VH regions pair to form monovalent molecules (known as single chain Fv (scFv) ; see, e.g., Bird et al. (1988) Science 242: 423-426; and Huston et al. (1988) Proc. Natl. Acad. Sci. USA 85: 5879-5883) . Such single chain antibodies are also intended to be encompassed within the term "antigen binding fragment" of an antibody.
[0140] Antigen binding fragments are obtained using conventional techniques known to those with skill in the art, and the fragments are screened for utility in the same manner as are intact antibodies. Antigen binding fragments can be produced by recombinant DNA techniques, or by enzymatic or chemical cleavage of intact immunoglobulins.
[0141] As used herein, the term "variable region" typically refers to a portion of an antibody, generally, a portion of a light or heavy chain, typically about the amino-terminal 110 to 120 amino acids, or 110 to 125 amino acids in the mature heavy chain and about 90 to 115 amino acids in the mature light chain, which differ extensively in sequence among antibodies and are used in the binding and specificity of a particular antibody for its particular antigen. The variability in sequence is concentrated in those regions called complementarity determining regions (CDRs) while the more highly conserved regions in the variable domain are called framework regions (FR) . Without wishing to be bound by any particular mechanism or theory, it is believed that the CDRs of the light and heavy chains are primarily responsible for the interaction and specificity of an antibody with antigen. In some aspects, the variable region is a mammalian variable region, e.g., a human, mouse or rabbit variable region. In some aspects, the variable region comprises rodent or murine CDRs and human framework regions (FRs) . In some aspects, the variable region is a primate (e.g., non-human primate) variable region. In some aspects, the variable region comprises rodent or murine CDRs and primate (e.g., non-human primate) framework regions (FRs) .
[0142] The terms "complementarity determining region" or "CDR" , as used herein, refer to each of the regions of an antibody variable domain which are hypervariable in sequence and / or form structurally defined loops (hypervariable loops) and / or contain the antigen-contacting residues. Antibodies can comprise six CDRs, e.g., three in the VH and three in the VL.
[0143] The terms "VL" , "VL region, " and "VL domain" are used herein interchangeably to refer to the light chain variable region of a multispecific antibody or antigen binding fragment thereof. In some aspects, a VL region is referred to herein as VL1 to denote a first light chain variable region, VL2 to denote a second light chain variable region, VL3 to denote a third light chain variable region, and so on. An enumerated VL region (e.g., VL1) can have the same or different antigen binding properties and / or the same or different sequence as another enumerated VL region (e.g., VL2) .
[0144] The terms "VH" , "VH region, " and "VH domain" are used herein interchangeably to refer to the heavy chain variable region of a multispecific antibody or antigen binding fragment thereof. In some aspects, a VH region is referred to herein as VH1 to denote a first heavy chain variable region, VH2 to denote a second heavy chain variable region, VH3 to denote a third heavy chain variable region, and so on. An enumerated VH region (e.g., VH1) can have the same or different antigen binding properties and / or the same or different sequence as another enumerated VH region (e.g., VH2) .
[0145] As used herein, "Kabat numbering" and like terms are recognized in the art and refer to a system of numbering amino acid residues in the heavy and light chain variable regions of an antibody or antigen binding fragment thereof. In some aspects, CDRs can be determined according to the Kabat numbering system (see, e.g., Kabat EA &Wu TT (1971) Ann NY Acad Sci 190: 382-391 and Kabat EA et al., (1991) Sequences of Proteins of Immunological Interest, Fifth Edition, U.S. Department of Health and Human Services, NIH Publication No. 91-3242) . Using the Kabat numbering system, CDRs within an antibody heavy chain molecule are typically present at amino acid positions 31 to 35, which optionally can include one or two additional amino acids, following 35 (referred to in the Kabat numbering scheme as 35A and 35B) (CDR1) , amino acid positions 50 to 65 (CDR2) , and amino acid positions 95 to 102 (CDR3) . Using the Kabat numbering system, CDRs within an antibody light chain molecule are typically present at amino acid positions 24 to 34 (CDR1) , amino acid positions 50 to 56 (CDR2) , and amino acid positions 89 to 97 (CDR3) .
[0146] As used herein, the terms "constant region" or "constant domain" are used interchangeably to refer to a portion of an antibody or antigen binding fragment thereof, e.g., a carboxyl terminal portion of a light and / or heavy chain which is not directly involved in binding of an antibody to antigen but which can exhibit various effector functions, such as interaction with the Fc region. The constant region generally has a more conserved amino acid sequence relative to a variable region. In some aspects, an antibody or antigen binding fragment thereof comprises a constant region or portion thereof that is sufficient for antibody-dependent cell-mediated cytotoxicity (ADCC) , antibody-dependent cellular phagocytosis (ADCP) , and complement-dependent cytotoxicity (CDC) .
[0147] As used herein, the terms "fragment crystallizable region, " "Fc region, " or "Fc domain" are used interchangeably herein to refer to the tail region of an antibody that interacts with cell surface receptors called Fc receptors and some proteins of the complement system. Fc regions typically comprise CH2 and CH3 regions, and, optionally, an immunoglobulin hinge.
[0148] As used herein, the terms "immunoglobulin hinge, " "hinge, " "hinge domain" or "hinge region" are used interchangeably to refer to a stretch of heavy chains between the Fab and Fc portions of an antibody or antigen binding fragment thereof. A hinge provides structure, position and flexibility, which assist with normal functioning of antibodies (e.g., for crosslinking two antigens or binding two antigenic determinants on the same antigen molecule) . An immunoglobulin hinge is divided into upper, middle and lower hinge regions that can be separated based on structural and / or genetic components. An immunoglobulin hinge of the disclosure can contain one, two or all three of these regions. Structurally, the upper hinge region stretches from the C terminal end of CH1 to the first hinge disulfide bond. The middle hinge region stretches from the first cysteine to the last cysteine in the hinge. The lower hinge region extends from the last cysteine to the glycine of CH2. The cysteines present in the hinge form interchain disulfide bonds that link the immunoglobulin monomers.
[0149] As used herein, the term "Fab" refers to a region of an antibody that binds to an antigen. It is typically composed of one constant and one variable domain of each of the heavy and the light chain.
[0150] As used herein, the term "heavy chain" refers to a portion of an antibody or antigen binding fragment thereof typically composed of a heavy chain variable region (VH) , a heavy chain constant region 1 (CH1) , a heavy chain constant region 2 (CH2) , and a heavy chain constant region 3 (CH3) . A typical antibody is composed of two heavy chains and two light chains. When used in reference to an antibody, a heavy chain can refer to any distinct type, e.g., alpha (α) , delta (δ) , epsilon (ε) , gamma (γ) , and mu (μ) , based on the amino acid sequence of the constant region, which gives rise to IgA, IgD, IgE, IgG, and IgM classes of antibodies, respectively, including subclasses of IgG, e.g., IgG1, IgG2, IgG3, and IgG4. Heavy chain amino acid sequences are known in the art. In some aspects, the heavy chain is a human heavy chain.
[0151] As used herein, the term "light chain" refers to a portion of an antibody or antigen binding fragment thereof typically composed of a light chain variable region (VL) and a light chain constant region (CL) . A typical antibody is composed of two light chains and two heavy chains. When used in reference to an antibody, a light chain can refer to any distinct type, e.g., kappa (κ) or lambda (λ) , based on the amino acid sequence of the constant region. Light chain amino acid sequences are known in the art. In some aspects, the light chain is a human light chain.
[0152] The term "chimeric" multispecific antibody or antigen binding fragment thereof refers to an antibody or antigen binding fragments thereof wherein the amino acid sequence is derived from two or more species. Typically, the variable region of both light and heavy chains corresponds to the variable region of antibodies or antigen binding fragments thereof derived from one species of mammals (e.g., mouse, rat, rabbit, etc. ) with the desired specificity, affinity and capability, while the constant regions are homologous to the sequences in antibodies or antigen binding fragments thereof derived from another (usually human) to avoid eliciting an immune response in that species.
[0153] As used herein, a multispecific antibody or antigen binding fragment thereof, or region or domain thereof that "specifically binds" refers to its association with an epitope by its antigen binding domain, and that the binding entails some complementarity between the antigen binding domain and the epitope. Specific binding to an epitope occurs where there is binding to that epitope via its antigen binding domain more readily than there would be binding to a random, unrelated epitope.
[0154] As used herein, an "epitope" refers to a localized region of an antigen to which an antigen binding polypeptide complex (e.g., multispecific antibody or antigen binding fragment thereof) can specifically bind. An epitope can be, for example, contiguous amino acids of a polypeptide (linear or contiguous epitope) or an epitope can, for example, come together from two or more non-contiguous regions of a polypeptide or polypeptides (conformational, non-linear, discontinuous, or non-contiguous epitope) . In some aspects, the epitope to which an antibody or antigen binding fragment thereof binds can be determined by, e.g., NMR spectroscopy, X-ray diffraction crystallography studies, ELISA assays, hydrogen / deuterium exchange coupled with mass spectrometry (e.g., liquid chromatography electrospray mass spectrometry) , array-based oligo-peptide scanning assays, and / or mutagenesis mapping (e.g., site-directed mutagenesis mapping) . See, e.g., Giegé R et al., (1994) Acta Crystallogr D Biol Crystallogr 50 (Pt 4) : 339-350; McPherson A (1990) Eur J Biochem 189: 1-23; Chayen NE (1997) Structure 5: 1269-1274; McPherson A (1976) J Biol Chem 251: 6300-6303; Meth Enzymol (1985) volumes 114 &115, eds Wyckoff HW et al., U.S. Pub. No. 2004 / 0014194) , Bricogne G (1993) Acta Crystallogr D Biol Crystallogr 49 (Pt 1) : 37-60, Bricogne G (1997) Meth Enzymol 276A: 361-423, ed Carter CW, and Roversi et al., (2000) Acta Crystallogr D Biol Crystallogr 56 (Pt 10) : 1316-1323 (X-ray diffraction crystallography studies) ; and Champe et al., (1995) J Biol Chem 270: 1388-1394 and Cunningham BC &Wells JA (1989) Science 244: 1081-1085 (mutagenesis mapping) .
[0155] Specific binding can be represented by a "binding affinity. " Binding affinity refers to an intrinsic binding affinity which reflects a 1: 1 interaction between members of a binding pair (e.g., an antigen binding polypeptide complex and an antigen) . Binding affinity can be measured and / or expressed in several ways known in the art, including, but not limited to, equilibrium dissociation constant (KD) . KD is calculated from the quotient of koff / kon, where kon refers to the association rate constant of, e.g., an antigen binding polypeptide complex to an antigen, and koff refers to the dissociation of, e.g., an antigen binding polypeptide complex from an antigen. The kon and koff can be determined by techniques known to one of ordinary skill in the art, such as Octet BLI, or KinExA.
[0156] In some aspects, the multispecific antibody or antigen binding fragment thereof specifically binds to an antigen with an equilibrium dissociation constant (KD) of from about 10 μM to about 1 pM. In some aspects, the antibody is IgG, IgM, IgE, IgA or IgD. For example, the antibody may be IgG. For example, the antibody may be IgM. For example, the antibody may be IgE. For example, the antibody may be IgA. For example, the antibody may be IgD. In some aspects, the IgG is IgG1, IgG2, IgG3 or IgG4. For example, the antibody may be IgG1. For example, the antibody may be IgG2. For example, the antibody may be IgG3. For example, the antibody may be IgG4. In some aspects, the antigen binding fragment is a Fab, scFab, Fab', F (ab') 2, Fv or scFv. For example, the antigen binding fragment may be a Fab. For example, the antigen binding fragment may be a scFab. For example, the antigen binding fragment may be a Fab'. For example, the antigen binding fragment may be a F (ab') 2. For example, the antigen binding fragment may be a Fv. For example, the antigen binding fragment may be a scFv. In some aspects, the antibody is human or humanized. For example, the antibody may be human. For the example, the antibody may be humanized.
[0157] The term "humanized" antibody or antigen binding fragment thereof refers to forms of non-human (e.g., murine) antibodies or antigen binding fragments that are specific immunoglobulin chains, chimeric immunoglobulins, or fragments thereof that contain minimal non-human (e.g., murine) sequences. Typically, humanized antibodies or antigen binding fragments thereof are human immunoglobulins in which residues from a complementary determining region (CDR) are replaced by residues from a CDR of a non-human species (e.g., mouse, rat, rabbit, hamster) that have the desired specificity, affinity, and capability (Jones et al., Nature 321: 522-525 (1986) ; Riechmann et al., Nature 332: 323-327 (1988) ; Verhoeyen et al., Science 239: 1534-1536 (1988) ) . In some aspects, the Fv framework region (FR) residues of a human immunoglobulin are replaced with the corresponding residues in an antibody or fragment from a non-human species that has the desired specificity, affinity, and capability. The humanized antibody or antigen binding fragment thereof can be further modified by the substitution of additional residues either in the Fv framework region and / or within the replaced non-human residues to refine and optimize antibody or antigen binding fragment thereof specificity, affinity, and / or capability. In general, a humanized antibody or antigen binding fragment thereof will comprise substantially all of at least one, and typically two or three, variable domains containing all or substantially all of the CDR regions that correspond to the non-human immunoglobulin whereas all or substantially all of the FR regions are those of a human immunoglobulin consensus sequence. A humanized antibody or antigen binding fragment thereof can also comprise at least a portion of a constant region, typically that of a human immunoglobulin. Examples of methods used to generate humanized antibodies are known and described, for example, in U.S. Pat. No. 5,225,539; Roguska et al., Proc. Natl. Acad. Sci., USA, 91 (3) : 969-973 (1994) , and Roguska et al., Protein Eng. 9 (10) : 895-904 (1996) .
[0158] The term "human" antibody or antigen binding fragment thereof, as used herein, means an antibody or antigen binding fragment thereof having an amino acid sequence derived from a human immunoglobulin gene locus, where such antibody or antigen binding fragment is made using recombinant techniques known in the art. This definition of a human antibody or antigen binding fragment thereof includes intact or full-length antibodies and fragments thereof.
[0159] An antibody, antigen binding fragment thereof, polynucleotide, vector, or cell which is "isolated" is an antibody, antigen binding fragment thereof, polynucleotide, vector, or cell which is in a form not found in nature. Isolated antibodies, antigen binding fragments thereof, polynucleotides, vectors, or cells include those which have been purified to a degree that they are no longer in a form in which they are found in nature. In some aspects, an antibody, antigen binding fragment thereof, polynucleotide, vector, or cell which is isolated is substantially pure. As used herein, "substantially pure" refers to material which is at least 50%pure (i.e., free from contaminants) , at least 90%pure, at least 95%pure, at least 98%pure, or at least 99%pure.
[0160] The terms "polypeptide, " "peptide, " and "protein" are used interchangeably herein to refer to polymers of amino acids of any length. The polymer can be linear or branched, it can comprise modified amino acids, and it can be interrupted by non-amino acids. The terms also encompass an amino acid polymer that has been modified naturally or by intervention; for example, disulfide bond formation, glycosylation, lipidation, acetylation, phosphorylation, or any other manipulation or modification, such as conjugation with a labeling component. Also included within the definition are, for example, polypeptides containing one or more analogs of an amino acid (including, for example, unnatural amino acids, etc. ) , as well as other modifications known in the art. It is understood that, because the polypeptides of this disclosure are based upon antibodies, in some aspects, the polypeptides can occur as single chains or associated chains.
[0161] As used herein, the terms "treat" or "treatment" refer to therapeutic or palliative measures. Beneficial or desired clinical results include, but are not limited to, alleviation, in whole or in part, of symptoms associated with a disease or disorder or condition, diminishment of the extent of disease, stabilized (i.e., not worsening) state of disease, delay or slowing of disease progression, amelioration or palliation of the disease state (e.g., one or more symptoms of the disease) , and remission (whether partial or total) , whether detectable or undetectable. "Treatment" can also mean prolonging survival as compared to expected survival if not receiving treatment.
[0162] As used herein, “subject” and “patient” are interchangeable terms.
[0163] As used herein, a "'therapeutically effective amount" is an amount of a multispecific antibody or antigen binding fragment thereof that is sufficient to achieve the desired effect and can vary according to the nature and severity of the disease condition, and the potency of the polypeptide or polypeptide complex. In some aspects, a multispecific antibody or antigen binding fragment thereof can be delivered by administering a polynucleotide, vector, cell that encodes the multispecific antibody or antigen binding fragment thereof. In some aspects, a multispecific antibody or antigen binding fragment thereof can be delivered by administering a pharmaceutical composition containing the multispecific antibody or antigen binding fragment thereof. A therapeutic effect is the relief, to some extent, of one or more of the symptoms of the disease, and can include curing a disease. "Curing" means that the symptoms of active disease are eliminated. However, certain long-term or permanent effects of the disease can exist even after a cure is obtained.
[0164] The use of the alternative (e.g., "or" ) should be understood to mean either one, both, or any combination thereof of the alternatives. As used herein, the indefinite articles "a" or "an" should be understood to refer to "one or more" of any recited or enumerated component.
[0165] As used herein, the term "and / or" is to be taken as specific disclosure of each of the two specified features or components with or without the other. Thus, the term "and / or" as used in a phrase such as "A and / or B" herein is intended to include "A and B, " "A or B, " "A" (alone) , and "B" (alone) . Likewise, the term "and / or" as used in a phrase such as "A, B, and / or C" is intended to encompass each of the following aspects: A, B, and C; A, B, or C; A or C; A or B; B or C; A and C; A and B; B and C; A (alone) ; B (alone) ; and C (alone) .
[0166] It is understood that wherever aspects are described herein with the language "comprising, " "having" and the like, otherwise analogous aspects described in terms of "consisting of" and / or "consisting essentially of" are also provided.
[0167] As used herein, the term "about" refers to a value or composition that is within an acceptable error range for the particular value or composition as determined by one of ordinary skill in the art, which will depend in part on how the value or composition is measured or determined, i.e., the limitations of the measurement system. For example, "about" can mean within 1 or more than 1 standard deviation per the practice in the art. Alternatively, "about" can mean a range of up to 10%or 20% (i.e., ±10%or ±20%) . For example, about 3 mg can include any number between 2.7 mg and 3.3 mg (for 10%) or between 2.4 mg and 3.6 mg (for 20%) . Furthermore, particularly with respect to biological systems or processes, the terms can mean up to an order of magnitude or up to 5-fold of a value. When particular values or compositions are provided in the application and claims, unless otherwise stated, the meaning of "about" should be assumed to be within an acceptable error range for that particular value or composition.
[0168] As described herein, any numerical range, concentration range, percentage range, ratio range or integer range is to be understood to include the value of any integer within the recited range and, when appropriate, fractions thereof (such as one-tenth and one-hundredth of an integer) , unless otherwise indicated.
[0169] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure is related. For example, the Concise Dictionary of Biomedicine and Molecular Biology, Juo, Pei-Show, 2nd ed., 2002, CRC Press; The Dictionary of Cell and Molecular Biology, 5th ed., 2013, Academic Press; and the Oxford Dictionary Of Biochemistry And Molecular Biology, 2006, Oxford University Press, provide one of skill with a general dictionary of many of the terms used in this disclosure.
[0170] Units, prefixes, and symbols are denoted in their Système International de Unites (SI) accepted form. Numeric ranges are inclusive of the numbers defining the range. The headings provided herein are not limitations of the various aspects of the disclosure, which can be had by reference to the specification as a whole. Accordingly, the terms defined herein are more fully defined by reference to the specification in its entirety.
[0171] Various aspects are described in further detail in the following sections. Multispecific Antibodies or Antigen Binding Fragments Thereof
[0172] In some aspects, provided herein are multispecific antibodies or antigen binding fragments thereof that specifically bind to cMet, Trop2, CD28, and CD3. Such multispecific antibodies or antigen binding fragments thereof specifically binding to cMet, Trop2, CD28, and CD3 can comprise, for example, (a) a variable light chain region (VL1) that specifically binds to cMet and a variable heavy chain region (VH1) that specifically binds to cMet; (b) a VL2 that specifically binds to Trop2 and a VH2 that specifically binds to Trop2; (c) a VL3 that specifically binds to CD28 and a VH3 that specifically binds to CD28; and (d) a VL4 that specifically binds to CD3 and VH4 that specifically binds to CD3.
[0173] In some aspects, the multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 provided herein can be "TM62. " TM62 is a tetraspecific T cell engager antibody that consists of two polypeptide chains of 1432 amino acids, with an approximate molecular weight of 155 kDa that recognizes 4 distinct antigens: cMet and Trop2 on certain human malignancies and CD3 and CD28 on human T cells (FIG. 1) . TM62 is produced using a Chinese hamster ovary (CHO) cell line following a manufacturing process commonly used in industry for monoclonal and bispecific antibodies.
[0174] TM62 is engineered with knob-into-hole mutations in the CH3 domain to promote fragment crystallizable (Fc) heterodimerization. TM62 has an immunoglobulin G1 (IgG1) Fc with modifications to abrogate Fc effector mediated functions and thus has no binding to human fragment crystallizable receptors for IgG (Fcγ) IIR (CD32) , FcγIIIR (CD16) and low binding to FcγIR (CD64) . This Fc-null design prevents triggering nonspecific T cell activation through Fc / Fc receptor (FcR) interactions.
[0175] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein specifically binds to CD3. CD3 is part of the T cell receptor (TCR) complex, relaying an activation signal after major histocompatibility complex (MHC) / TCR engagement. CD3 is composed of 4 distinct polypeptide chains: epsilon (ε) , gamma (y) , delta (δ) and zeta (ζ) , forming heterodimers as εγ, εδ, and ζζ. The CD3 binding epitope of TM62 is on the CD3 ε chain. Human CD3 has the following epsilon chain full-length sequence:
[0176] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein specifically binds to CD28. CD28 is a T cell membrane protein serving as the receptor for B7 family ligand. It acts as a major costimulatory receptor in promoting full activation and survival of naive T cells. Human CD28 has the following full-length sequence:
[0177] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein specifically binds to cMet. cMet is a receptor tyrosine kinase. Upon engagement by its ligand, hepatocyte growth factor (HGF) , cMet stimulates a wide range of cellular signaling pathways that induce proliferation, motility, migration, and invasion. cMet is an important driver of human malignancies as it has been found to be aberrantly activated in human cancers via mutation, amplification, or protein overexpression. Human cMet has the following full-length sequence:
[0178] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein specifically binds to Trop2. Trop2 (Trophoblast cell surface antigen 2) is a cell surface glycoprotein that acts as a transmembrane transducer of intracellular calcium signals. Expression of Trop2 is associated with enhanced tumor aggressiveness, metastasis, drug resistance, and increased tumor cell survival. Human Trop2 has the following full-length sequence:
[0179] In some aspects, the multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 provided herein can contain one or more sequences provided herein. Antibodies or antigen binding fragments that specifically bind to cMet, Trop2, CD28, and CD3 are known in the art as commercially available or in development. Examples of such antibodies or antigen binding fragments are provided herein.
[0180] Anti-cMet antibodies
[0181] Various anti-cMet antibodies and bispecific antibodies are known in the art (see e.g., US7498420B2) . For example, Amivantamab (JNJ-61186372) is a fully human IgG1-based bispecific antibody directed against the EGF and cMet receptors. The Amivantamab domain that binds c-Met comprises the heavy chain CDR1 having the amino acid sequence of SYGIS (SEQ ID NO: 47) , the CDR2 having the amino acid sequence of ISAYNGYTNYAQKLQG (SEQ ID NO: 48) , and the CDR3 having the amino acid sequence of DLRGTNYFDY (SEQ ID NO: 49) , and the light chain CDR1 having the amino acid sequence of RASQGISNWLA (SEQ ID NO: 50) , the CDR2 having the amino acid sequence of AASSLLS (SEQ ID NO: 51) and the CDR3 having the amino acid sequence of QQANSFPIT (SEQ ID NO: 52) . Such anti-cMet sequences are contemplated for use in the multispecific antibody or antigen binding fragment thereof described herein. However, the person of ordinary skill will realize that any known anti-CD3 antibody may be utilized in the claimed methods and compositions.
[0182] Anti-Trop2 Antibodies
[0183] Anti-Trop-2 antibodies are commercially available from a number of sources and include LS-C126418, LS-C178765, LS-C126416, LS-C126417 (LifeSpan BioSciences, Inc., Seattle, Wash. ) ; 10428-MM01, 10428-MM02, 10428-R001, 10428-R030 (Sino Biological Inc., Beijing, China) ; MR54 (eBioscience, San Diego, Calif. ) ; sc-376181, sc-376746, Santa Cruz Biotechnology (Santa Cruz, Calif. ) ; MM0588-49D6, (Novus Biologicals, Littleton, Colo. ) ; ab79976, and ab89928 ( Cambridge, Mass. ) Other anti-Trop-2 antibodies have been disclosed in the patent literature. For example, U.S. Publ. No. 2013 / 0089872 discloses anti-Trop-2 antibodies K5-70 (Accession No. FERM BP-11251) , K5-107 (Accession No. FERM BP-11252) , K5-116-2-1 (Accession No. FERM BP-11253) , T6-16 (Accession No. FERM BP-11346) , and T5-86 (Accession No. FERM BP-11254) , deposited with the International Patent Organism Depositary, Tsukuba, Japan. U.S. Pat. No. 5,840,854 disclosed the anti-Trop-2 monoclonal antibody BR110 (ATCC No. HB11698) . U.S. Pat. No. 7,420,040 disclosed an anti-Trop-2 antibody produced by hybridoma cell line AR47A6.4.2, deposited with the IDAC (International Depository Authority of Canada, Winnipeg, Canada) as accession number 141205-05. U.S. Pat. No. 7,420,041 disclosed an anti-Trop-2 antibody produced by hybridoma cell line AR52A301.5, deposited with the IDAC as accession number 141205-03. U.S. Publ. No. 2013 / 0122020 disclosed anti-Trop-2 antibodies 3E9, 6G11, 7E6, 15E2, and 18B1. Hybridomas encoding a representative antibody were deposited with the American Type Culture Collection (ATCC) , Accession Nos. PTA-12871 and PTA-12872. U.S. Pat. No. 8,715,662 discloses anti-Trop-2 antibodies produced by hybridomas deposited at the AID-ICLC (Genoa, Italy) with deposit numbers PD 08019, PD 08020 and PD 08021. U.S. Patent Application Publ. No. 20120237518 discloses anti-Trop-2 antibodies 77220, KM4097 and KM4590. U.S. Pat. No. 8,309,094 (Wyeth) discloses antibodies A1 and A3, identified by sequence listing. The Examples section of each patent or patent application cited above in this paragraph is incorporated herein by reference. Non-patent publication Lipinski et al. (1981, Proc Natl. Acad Sci USA, 78: 5147-50) disclosed anti-Trop-2 antibodies 162-25.3 and 162-46.2.
[0184] Sacituzumab govitecan, sold under the brand name is an antibody-drug conjugate composed of a humanized monoclonal antibody targeting Trop2, a topoisomerase-I inhibitor, and linker protein. The humanized monoclonal antibody targeting Trop2 in sacituzumab govitecan comprises the light chain CDR1 having the amino acid sequence of KASQDVSIAVA (SEQ ID NO: 53) , the CDR2 having the amino acid sequence of SASYRYT (SEQ ID NO: 54) , and the CDR3 having the amino acid sequence of QQHYITPLT (SEQ ID NO: 55) , and the heavy chain CDR1 having the amino acid sequence of NYGMN (SEQ ID NO: 56) , the CDR2 having the amino acid sequence of WINTYTGEPTYTDDFKG (SEQ ID NO: 57) , and the CDR3 having the amino acid sequence of GGFGSSYWYFDV (SEQ ID NO: 58) . Such anti-Trop2 sequences are contemplated for use in the multispecific antibody or antigen binding fragment thereof described herein. However, the person of ordinary skill will realize that any known anti-Trop2 antibody may be utilized in the claimed methods and compositions.
[0185] Anti-CD28 Antibodies
[0186] Various anti-CD28 antibodies and bispecific antibodies are known in the art (see e.g., PCT / US2015 / 053233) . For example, commercially available Lulizumab pegol (otherwise known as BMS-931699 or lh-239-891 (D70C) monovalently binds CD28. The variable domain of the monovalent anti-CD28 domain antibody comprises: the CDR1 having the amino acid sequence of RASRPIWPFLE (SEQ ID NO: 59) , the CDR2 having the amino acid sequence of FTSRLRH (SEQ ID NO: 60) , and the CDR3 having the amino acid sequence of LQNVANPAT (SEQ ID NO: 61) .
[0187] Such anti-CD28 sequences are contemplated for use in the multispecific antibody or antigen binding fragment thereof described herein. However, the person of ordinary skill will realize that any known anti-CD28 antibody may be utilized in the claimed methods and compositions.
[0188] Anti-CD3 Antibodies
[0189] A variety of antibodies against CD3 that may be used in the claimed methods and compositions are publicly known and / or commercially available, such as muromonab-CD3, otelixizumab (TRX4) , teplizumab ( (teplizumab-mzwv) , and visilizumab (canceled production following Phase II / III clinical trials) . Various antibodies against CD3 are also commercially available from LSBio (catalog Nos. LS-B6698, LS-B8669; LS-B8765, LS-C96311, LS-058677, etc. ) , (catalog Nos. ab5690, ab16669, ab699, ab828, ab8671, etc. ) , Santa Cruz Biotechnology (catalog Nos. sc-20047, sc-20080, sc-19590, sc-59008, sc-101442, etc. ) , and many other suppliers.
[0190] Teplizumab comprises the light chain CDR1 having the amino acid sequence of SSVSY (SEQ ID NO: 62) , the CDR2 having the amino acid sequence of DTS (SEQ ID NO: 63) , the CDR3 having the amino acid sequence of QQWSSNPFT (SEQ ID NO: 64) , and the heavy chain CDR1 having the amino acid sequence of GYTFTRYT (SEQ ID NO: 65) , the CDR2 having the amino acid sequence of INPSRGYT (SEQ ID NO: 66) , and the CDR3 having the amino acid sequence of ARYYDDYYCLDY (SEQ ID NO: 67) . Such anti-CD3 sequences are contemplated for use in the multispecific antibody or antigen binding fragment thereof described herein. However, the person of ordinary skill will realize that any known anti-CD3 antibody may be utilized in the claimed methods and compositions.
[0191] In some aspects, the multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 provided herein can be TM62.
[0192] In some aspects, the disclosure is directed to a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 comprising: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 24. As used herein, "at least 90%identity" includes at least 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%and 100%identity to the recited reference sequence.
[0193] In some aspects, the multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 can comprise (a) a VL1 that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and a VH1 that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0194] In some aspects, the present disclosure provides a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 comprising: (a) a variable light chain region (VL1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 25; and a variable heavy chain region (VH1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 32. As used herein, "at least 90%identity" includes at least 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%and 100%identity to the recited reference sequence.
[0195] In some aspects, the present disclosure provides a multispecific antibody or antigen binding fragment thereof comprising (a) a VL1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and a VH1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0196] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide comprises an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 33, and the second polypeptide comprises an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 34. In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide comprises the amino acid sequence of SEQ ID NO: 33, and the second polypeptide comprises the amino acid sequence of SEQ ID NO: 34.
[0197] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide is encoded by a polynucleotide sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 35, and the second polypeptide is encoded by a polynucleotide sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 36. In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide is encoded by the polynucleotide sequence of SEQ ID NO: 35, and the second polypeptide is encoded by the polynucleotide sequence of SEQ ID NO: 36.
[0198] In some aspects, the multispecific antibody or antigen binding fragment thereof is a full-length antibody. In some aspects, the multispecific antibody or antigen binding fragment thereof comprises an immunoglobulin G1 (IgG1) constant region.
[0199] In some aspects, the multispecific antibody or antigen binding fragment thereof has an Fc region containing a knob-into-hole (KIH) structure. In some aspects of the multispecific antibody or antigen binding fragment thereof disclosed herein, the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45. In some aspects of the multispecific antibody or antigen binding fragment thereof disclosed herein, the hole side of the Fc region comprises the amino acid sequence of SEQ ID NO: 46.
[0200] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises an antigen binding fragment.
[0201] In some aspects, the present disclosure provides a nucleic acid encoding the multispecific antibody or antigen binding fragment thereof disclosed herein.
[0202] In some aspects, the present disclosure provides a nucleic acid expression vector comprising the nucleic acid encoding the multispecific antibody or antigen binding fragment thereof disclosed herein. In some aspects, the present disclosure provides a host cell or population of host cells comprising the nucleic acid expression vector. Pharmaceutical Compositions and Kits
[0203] In some aspects, the disclosure is directed to a pharmaceutical composition or kit comprising a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein.
[0204] In some aspects, the disclosure is directed to a pharmaceutical composition comprising (1) a multispecific antibody or antigen binding fragment thereof, polynucleotide, vector, or cell described herein, and (2) a pharmaceutically acceptable carrier. The term "pharmaceutically acceptable carrier" includes any and all solvents, co-solvents, complexing agents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents, and the like, which are not biologically or otherwise undesirable. The use of such media and agents for pharmaceutically active substances is known in the art. Except insofar as any conventional media or agent is incompatible with the active ingredient, its use in the therapeutic formulations is contemplated. Supplementary active ingredients can also be incorporated into the pharmaceutical compositions of the disclosure. In addition, various excipients, such as are commonly used in the art, can be included. These and other such compounds are described in the literature, e.g., in the Merck Index, Merck &Company, Rahway, NJ. Considerations for the inclusion of various components in pharmaceutical compositions are described, e.g., in Gilman et al. (Eds. ) (2010) ; Goodman and Gilman's : The Pharmacological Basis of Therapeutics, 12th Ed., The McGraw-Hill Companies. In some aspects, the pharmaceutical composition is for parenteral, intravenous or subcutaneous administration. In some aspects, the pharmaceutical composition can be administered parenterally. This includes systemic administration by intramuscular, intravenous, subcutaneous, intradermal or intraperitoneal means. As described herein, the active pharmaceutical moiety in the form of a multispecific antibody in the suitable liquid formulation reconstituted from a lyophilized formulation is administered to a subject in need of treatment thereof. Such a subject includes mammals such as humans and animals (farm animals, companion animals, etc. ) .
[0205] In some aspects, the pharmaceutical composition is for subcutaneous administration.
[0206] In some aspects, a physiologically tolerated buffer can be added to provide a desired pH.The pharmaceutical composition can cover a wide range of physiologically tolerated pHs, such as from about pH 4.0 to about pH 9.0. In some aspects, the pH range in the formulation of the disclosure is from about 4.0 to about 7.0, or from about 4.0 to about 6.5, or from about 4.0 to about 6.0, or from about 4.0 to about 5.5, or from about 4.0 to about 5.0, or from about 4.5 to about 6.5 or from about 4.5 to about 6.0, or from about 4.5 to about 5.5. In some aspects, the pH value of the formulation of the disclosure is about 4.5.
[0207] In some aspects, the pharmaceutical composition described herein can have a pH of about 4, about 4.1, about 4.2, about 4.3, about 4.4, about 4.5, about 4.6, about 4.7, about 4.8, about 4.9, about 5, about 5.1, about 5.2, about 5.3, about 5.4, about 5.5, about 5.6, about 5.7, about 5.8, about 5.9, about 6, about 5.1, about 5.2, about 5.3, about 5.4, about 5.5, about 5.6, about 5.7, about 5.8, about 5.9, about 6, about 6.1, about 6.2, about 6.3, about 6.4, about 6.5, about 6.6, about 6.7, about 6.8, about 6.9, about 7, about 7.1, about 7.2, about 7.3, about 7.4, about 7.5, about 7.6, about 7.7, about 7.8, about 7.9, about 8, about 8.1, about 8.2, about 8.3, about 8.4, about 8.5, about 8.6, about 8.7, about 8.8, about 8.9, or about 9. In some aspects, the pharmaceutical composition described herein can have a pH of about 4, about 4.1, about 4.2, about 4.3, about 4.4, about 4.5, about 4.6, about 4.7, about 4.8, about 4.9, about 5, about 5.1, about 5.2, about 5.3, about 5.4, about 5.5, about 5.6, about 5.7, about 5.8, about 5.9, about 6, about 5.1, about 5.2, about 5.3, about 5.4, about 5.5, about 5.6, about 5.7, about 5.8, about 5.9, or about 6. In some aspects, the pharmaceutical composition described herein can have a pH of about 5, about 5.1, about 5.2, about 5.3, about 5.4, or about 5.5. In some aspects, the pharmaceutical composition described herein can have a pH of about 5.2.
[0208] In some aspects, the present disclosure provides a stable liquid formulation comprising a pharmaceutically effective amount of a multispecific antibody or antibody or antigen binding fragment, or a pharmaceutically acceptable salt thereof, and an aqueous buffer solution, wherein the formulation has a pH value of from about 4.7 to about 6.5, and wherein the multispecific antibody or antigen binding fragment thereof specifically binds to cMet, Trop2, CD28, and CD3 and comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 24. In some aspects, (a) the VL1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and the VH1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) the VL2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and the VH2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) the VL3 that specifically binds to CD28 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) the VL4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and the VH4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0209] In some aspects, the present disclosure provides a stable liquid formulation comprising a pharmaceutically effective amount of a multispecific antibody or antibody or antigen binding fragment, or a pharmaceutically acceptable salt thereof, and an aqueous buffer solution, wherein the formulation has a pH value of from about 4.7 to about 6.5, and wherein the multispecific antibody or antigen binding fragment there specifically binds to cMet, Trop2, CD28, and CD3 and comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 25; and a variable heavy chain region (VH1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 32. In some aspects, (a) the VL1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and the VH1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) the VL2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and the VH2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) the VL3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) the VL4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and the VH4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0210] In some aspects, the present disclosure provides a stable lyophilized formulation suitable for reconstitution in water to form a stable liquid formulation comprising a pharmaceutically effective amount of a multispecific antibody or antibody or antigen binding fragment, or a pharmaceutically acceptable salt thereof, and an aqueous buffer solution, wherein the formulation has a pH value of from about 4.7 to about 6.5, wherein the multispecific antibody or antigen binding fragment thereof specifically binds to cMet, Trop2, CD28, and CD3 and comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 24. In some aspects, (a) the VL1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and the VH1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) the VL2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and the VH2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) the VL3 that specifically binds to CD28 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) the VL4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and the VH4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0211] In some aspects, the present disclosure provides a stable lyophilized formulation suitable for reconstitution in water to form a stable liquid formulation comprising a pharmaceutically effective amount of a multispecific antibody or antigen-binding fragment thereof, or a pharmaceutically acceptable salt thereof, and an aqueous buffer solution, wherein the formulation has a pH value of from about 4.7 to about 6.5, wherein the multispecific antibody or antigen binding fragment thereof specifically binds to cMet, Trop2, CD28, and CD3 and comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 25; and a variable heavy chain region (VH1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 32. In some aspects, (a) the VL1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and the VH1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) the VL2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and the VH2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) the VL3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) the VL4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and the VH4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0212] In some aspects, the pharmaceutical composition comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein. In some aspects, the pharmaceutical composition can comprise a multispecific antibody or antigen binding fragment thereof described herein in a concentration of from about 1 mg / mL to about 100 mg / mL or about 1 mg / mL to about 50 mg / mL. In some aspects, the pharmaceutical composition can comprise a multispecific antibody or antigen binding fragment thereof described herein in a concentration of about 0.1 mg / mL, about 0.2 mg / mL, about 0.3 mg / mL, about 0.4 mg / mL, about 0.5 mg / mL, about 0.6 mg / mL, about 0.7 mg / mL, about 0.8 mg / mL, about 0.9 mg / mL, about 1 mg / mL, about 2 mg / mL, about 3 mg / mL, about 4 mg / mL, about 5 mg / mL, about 6 mg / mL, about 7 mg / mL, about 8 mg / mL, about 9 mg / mL, about 10 mg / mL, about 11 mg / mL, about 12 mg / mL, about 13 mg / mL, about 14 mg / mL, about 15 mg / mL, about 16 mg / mL, about 17 mg / mL, about 18 mg / mL, about 19 mg / mL, about 20 mg / mL, about 21 mg / mL, about 22 mg / mL, about 23 mg / mL, about 24 mg / mL, about 25 mg / mL, about 26 mg / mL, about 27 mg / mL, about 28 mg / mL, about 29 mg / mL, about 30 mg / mL, about 31 mg / mL, about 32 mg / mL, about 33 mg / mL, about 34 mg / mL, about 35 mg / mL, about 36 mg / mL, about 37 mg / mL, about 38 mg / mL, about 39 mg / mL, about 40 mg / mL, about 41 mg / mL, about 42 mg / mL, about 43 mg / mL, about 44 mg / mL, about 45 mg / mL, about 46 mg / mL, about 47 mg / mL, about 48 mg / mL, about 49 mg / mL, about 50 mg / mL, about 51 mg / mL, about 52 mg / mL, about 53 mg / mL, about 54 mg / mL, about 55 mg / mL, about 56 mg / mL, about 57 mg / mL, about 58 mg / mL, about 60 mg / mL, about 61 mg / mL, about 62 mg / mL, about 63 mg / mL, about 64 mg / mL, about 65 mg / mL, about 66 mg / mL, about 67 mg / mL, about 68 mg / mL, about 69 mg / mL, about 70 mg / mL, about 71 mg / mL, about 72 mg / mL, about 73 mg / mL, about 74 mg / mL, about 75 mg / mL, about 76 mg / mL, about 77 mg / mL, about 78 mg / mL, about 79 mg / mL, about 80 mg / mL, about 81 mg / mL, about 82 mg / mL, about 83 mg / mL, about 84 mg / mL, about 85 mg / mL, about 86 mg / mL, about 87 mg / mL, about 88 mg / mL, about 89 mg / mL, about 90 mg / mL, about 91 mg / mL, about 92 mg / mL, about 93 mg / mL, about 94 mg / mL, about 95 mg / mL, about 96 mg / mL, about 97 mg / mL, about 98 mg / mL, about 99 mg / mL, or about 100 mg / mL. In one aspect, the pharmaceutical composition can comprise a multispecific antibody or antigen binding fragment thereof described herein in a concentration of about 1 mg / mL.
[0213] In one aspect, in the formulation of the disclosure, the multispecific antibody or antigen binding fragment thereof described herein is present in a suitable vial at a concentration range of from about 1 mg / mL to about 100 mg / mL. In some aspects, in the formulation of the disclosure, the multispecific antibody or antigen binding fragment thereof described herein is present in a suitable vial at a concentration of about 0.1 mg / mL, about 0.2 mg / mL, about 0.3 mg / mL, about 0.4 mg / mL, about 0.5 mg / mL, about 0.6 mg / mL, about 0.7 mg / mL, about 0.8 mg / mL, about 0.9 mg / mL, about 1 mg / mL, about 2 mg / mL, about 3 mg / mL, about 4 mg / mL, about 5 mg / mL, about 6 mg / mL, about 7 mg / mL, about 8 mg / mL, about 9 mg / mL, about 10 mg / mL, about 11 mg / mL, about 12 mg / mL, about 13 mg / mL, about 14 mg / mL, about 15 mg / mL, about 16 mg / mL, about 17 mg / mL, about 18 mg / mL, about 19 mg / mL, about 20 mg / mL, about 21 mg / mL, about 22 mg / mL, about 23 mg / mL, about 24 mg / mL, about 25 mg / mL, about 26 mg / mL, about 27 mg / mL, about 28 mg / mL, about 29 mg / mL, about 30 mg / mL, about 31 mg / mL, about 32 mg / mL, about 33 mg / mL, about 34 mg / mL, about 35 mg / mL, about 36 mg / mL, about 37 mg / mL, about 38 mg / mL, about 39 mg / mL, about 40 mg / mL, about 41 mg / mL, about 42 mg / mL, about 43 mg / mL, about 44 mg / mL, about 45 mg / mL, about 46 mg / mL, about 47 mg / mL, about 48 mg / mL, about 49 mg / mL, or about 50 mg / mL. In one aspect, the multispecific antibody or antigen binding fragment thereof is present in a suitable vial at a concentration of about 1 mg / mL. In one aspect, the suitable vial is a single use vial.
[0214] In one aspect, in the formulation of the disclosure, the multispecific antibody or antigen binding fragment thereof or a pharmaceutically acceptable salt thereof, is present in a suitable vial at a concentration range of from about 1 mg / mL to about 100 mg / mL. In some aspects, in the formulation of the disclosure, the multispecific antibody or antigen binding fragment thereof, or a pharmaceutically acceptable salt thereof, described herein, is present in a suitable vial at a concentration of about 0.1 mg / mL, about 0.2 mg / mL, about 0.3 mg / mL, about 0.4 mg / mL, about 0.5 mg / mL, about 0.6 mg / mL, about 0.7 mg / mL, about 0.8 mg / mL, about 0.9 mg / mL, about 1 mg / mL, about 2 mg / mL, about 3 mg / mL, about 4 mg / mL, about 5 mg / mL, about 6 mg / mL, about 7 mg / mL, about 8 mg / mL, about 9 mg / mL, about 10 mg / mL, about 11 mg / mL, about 12 mg / mL, about 13 mg / mL, about 14 mg / mL, about 15 mg / mL, about 16 mg / mL, about 17 mg / mL, about 18 mg / mL, about 19 mg / mL, about 20 mg / mL, about 21 mg / mL, about 22 mg / mL, about 23 mg / mL, about 24 mg / mL, about 25 mg / mL, about 26 mg / mL, about 27 mg / mL, about 28 mg / mL, about 29 mg / mL, about 30 mg / mL, about 31 mg / mL, about 32 mg / mL, about 33 mg / mL, about 34 mg / mL, about 35 mg / mL, about 36 mg / mL, about 37 mg / mL, about 38 mg / mL, about 39 mg / mL, about 40 mg / mL, about 41 mg / mL, about 42 mg / mL, about 43 mg / mL, about 44 mg / mL, about 45 mg / mL, about 46 mg / mL, about 47 mg / mL, about 48 mg / mL, about 49 mg / mL, or about 50 mg / mL. In one aspect, the multispecific antibody or antigen binding fragment thereof or a pharmaceutically acceptable salt thereof, is present in a suitable vial at a concentration of about 1 mg / mL. In one aspect, the suitable vial is a single use vial.
[0215] Provided herein is a multispecific antibody or antigen binding fragment thereof, or pharmaceutically acceptable salt thereof for formulation into pharmaceutical compositions described herein, wherein the multispecific antibody or antigen binding fragment thereof, or pharmaceutically acceptable salt thereof specifically binds to cMet, Trop2, CD28, and CD3 and comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 24. In some aspects of the multispecific antibody or antigen binding fragment thereof of, (a) the VL1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and the VH1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) the VL2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and the VH2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) the VL3 that specifically binds to CD28 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) the VL4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and the VH4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0216] In some aspects, provided herein is a multispecific antibody or antigen binding fragment thereof, or pharmaceutically acceptable salt thereof, for formulation into pharmaceutical compositions described herein, that specifically binds to cMet, Trop2, CD28, and CD3 comprising: (a) a variable light chain region (VL1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 25; and a variable heavy chain region (VH1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 32. In some aspects, (a) the VL1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and the VH1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) the VL2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and the VH2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) the VL3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) the VL4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and the VH4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0217] In one aspect, the present disclosure provides a pharmaceutical composition comprising a multispecific antibody or antigen binding fragment thereof, or pharmaceutically acceptable salt thereof, or an active fragment thereof, described herein, and a pharmaceutically acceptable excipient selected from the group consisting of methionine, sucrose, and a buffer solution.
[0218] In another aspect, the present disclosure provides a pharmaceutical composition comprising a multispecific antibody or antigen binding fragment thereof, or pharmaceutically acceptable salt thereof, or an active fragment thereof, described herein, and a pharmaceutically acceptable excipient selected from the group consisting of methionine, sucrose, a buffer solution, and a surfactant.
[0219] The present disclosure further provides a stable liquid formulation comprising a multispecific antibody or antigen binding fragment thereof, or pharmaceutically acceptable salt thereof, or an active fragment thereof, described herein, in an aqueous buffer solution, wherein the formulation has a pH range of from about 4.0 to about 7.0. The formulation optionally comprises additional excipients selected from organic bases, tonicity agents and other excipients which do not destabilize or negatively affect the formulation. In addition to, or as a substitute for methionine, arginine may also be used as a stabilizing amino acid. In one aspect, the stable liquid formulation of the disclosure has a pH range of from about 4.0 to about 6.0. In another aspect, the stable liquid formulation of the disclosure has a pH range of from about 5.0 to about 6.0.
[0220] In one aspect, the stable liquid formulation of the disclosure is administered to the patient from suitable containers (vials, pre-filled syringes, cartridges, etc. ) and at suitable dosages ranging from about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject, twice a week or once a week or at longer dosage intervals. In one aspect, the stable liquid formulation of the disclosure is administered to the patient at suitable dosages ranging from about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject, one, two, three, or up to four times during a 28-day treatment cycle.
[0221] Autoinjectors are also contemplated, in some aspects. The dosage amounts may change depending upon the weight of the patient and the nature and severity of the disease condition or state and dose may be titrated from lower initial dose to higher dose.
[0222] In some aspects, the pharmaceutical composition comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein; and a buffer. In some aspects, the buffer can be a salt prepared from an organic acid or base. In some aspects, representative buffers include, but are not limited to: organic acid salts such as salts of citric acid, ascorbic acid, gluconic acid, carbonic acid, tartaric acid, succinic acid, acetic acid, or phthalic acid; Tris, tromethamine hydrochloride, phosphate buffers, acetate buffer, citrate buffer, succinate buffer, or histidine buffer. In some aspects, representative buffers include, but are not limited to: acetate buffer, citrate buffer, succinate buffer, and histidine buffer. In some aspects, the buffer is an acetate buffer. In some aspects, the buffer is a histidine buffer. In some aspects, the buffer solution in the formulation of the disclosure is selected from the group consisting of an acetate buffer solution, a citrate buffer solution, and a histidine buffer solution. In some aspects, the buffer solution is an acetate buffer solution. In one aspect, the buffer solution is a citrate buffer solution. In one aspect, the buffer solution is a histidine buffer solution.
[0223] In some aspects, a pharmaceutical composition described herein comprises a buffer having a concentration of from about 1 mM to about 40 mM. In some aspects, a pharmaceutical composition described herein comprises a buffer having a concentration of about 1 nM about 5 nM, about 10 nM, about 15 nM, about 20 nM, about 25 nM, about 30 nM, about 35 nM, to about 40 nM. In some aspects, a pharmaceutical composition described herein comprises a buffer having a concentration of about 15 nM, about 20 nM, or about 25 nM. In some aspects, the pharmaceutical composition described herein can comprise a buffer having a concentration of about 20 nM. In some aspects, the pharmaceutical composition described herein comprises a 20 mM histidine buffer. In some aspects, the pharmaceutical composition described herein comprises a 20 mM acetate buffer to support a target pH of about 5.2. In some aspects, the pharmaceutical composition described herein comprises a 20 mM histidine buffer to support a target pH of about 5.4. In some aspects, the pharmaceutical composition described herein comprises a 20 mM histidine buffer to support a target pH of about 5.2. In some aspects, the pharmaceutical composition comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein; and a stabilizing excipient. In some aspects, suitable stabilizing excipients include, but are not limited to: sugars such as sucrose, mannitol, lactose, trehalose, glucose, sorbitol, or the like. In some aspects, a pharmaceutical composition described herein comprises sucrose. In some aspects, a pharmaceutical composition described herein can comprise sucrose in a concentration of from about 1% (w / v) to about 50% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise sucrose in a concentration of about 1% (w / v) , about 2% (w / v) , about 3% (w / v) , about 4% (w / v) , about 5% (w / v) , about 6% (w / v) , about 7% (w / v) , about 8% (w / v) , about 9% (w / v) , about 10% (w / v) , about 11% (w / v) , about 12% (w / v) , about 13% (w / v) , about 14% (w / v) , about 15% (w / v) , about 16% (w / v) , about 17% (w / v) , about 18% (w / v) , about 19% (w / v) , about 20% (w / v) , about 21% (w / v) , about 22% (w / v) , about 23% (w / v) , about 24% (w / v) , about 25% (w / v) , about 26% (w / v) , about 27% (w / v) , about 28% (w / v) , about 29% (w / v) , about 30% (w / v) , about 31% (w / v) , about 32% (w / v) , about 33% (w / v) , about 34% (w / v) , about 35% (w / v) , about 36% (w / v) , about 37% (w / v) , about 38% (w / v) , about 39% (w / v) , about 40% (w / v) , about 41% (w / v) , about 42% (w / v) , about 43% (w / v) , about 44% (w / v) , about 45% (w / v) , about 46% (w / v) , about 47% (w / v) , about 48% (w / v) , about 49% (w / v) , or about 50% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise sucrose in a concentration of about 35% (w / v) , about 40% (w / v) , or about 50% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise sucrose in a concentration of about 40% (w / v) . In some aspects, the pharmaceutical composition described herein can comprise sucrose in a concentration of about 5% (w / v) , about 6% (w / v) , about 7% (w / v) , about 8% (w / v) , about 9% (w / v) , or about 10% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise sucrose in a concentration of about 8% (w / v) .
[0224] In some aspects, the formulation of the disclosure further comprises one or more additional pharmaceutically acceptable excipients as known in the art. In some aspects, the additional pharmaceutically acceptable excipient is methionine, a derivative of methionine, arginine, or a derivative of arginine.
[0225] In some aspects, a pharmaceutical composition of the disclosure comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein; and a stabilizer and / or antioxidant. Stabilizers suitable for use in the liquid compositions of the disclosure include, but are not limited to: ionic and non-ionic stabilizers (and combinations thereof) , such as sugars, glycine, sodium chloride, arginine, EDTA, sodium ascorbate, cysteine, sodium bisulfate, sodium citrate, methionine, L-methionine, and benzyl alcohol. In some aspects, stabilizers tend to have antioxidant properties that can reduce oxidation in antibodies. In some aspects, a pharmaceutical composition described herein can comprise methionine or L-methionine. In some aspects, a pharmaceutical composition described herein can comprise L-methionine. In some aspects, a pharmaceutical composition described herein can comprise L-methionine in a concentration of from about 1 mM to about 100 mM. In some aspects, a pharmaceutical composition described herein can comprise L-methionine in a concentration of from about 1 mM to about 100 mM, or L-methionine in a concentration of about 1 nM, about 5 nM, about 10 nM, about 15 nM, about 20 nM, about 25 nM, about 30 nM, about 35 nM, about 40 nM, about 45 nM, about 50 nM, about 55 nM, about 60 nM, about 65 nM, about 70 nM, about 75 nM, about 80 nM, about 85 nM, about 90 nM, about 95 nM, or about 100 nM. In some aspects, a pharmaceutical composition described herein can comprise L-methionine in a concentration of about 100 nM. In some aspects, a pharmaceutical composition described herein can comprise L-methionine in a concentration of about 10 nM.
[0226] In some aspects, a pharmaceutical composition of the disclosure comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein; and a surfactant. Surfactants suitable for use in a pharmaceutical composition described herein include, but are not limited to: polysorbates and poloxamers, such as polysorbate 80, polysorbate 20, and poloxamer 188. In some aspects, a pharmaceutical composition described herein can comprise polysorbate 80. In some aspects, a pharmaceutical composition described herein can comprise polysorbate 20. In some aspects, a pharmaceutical composition described herein can comprise poloxamer 188. In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of from about . 01% (w / v) to about 10% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of about . 01% (w / v) , about . 02% (w / v) , about .03% (w / v) , about . 04% (w / v) , about . 05% (w / v) , about . 06% (w / v) , about . 07% (w / v) , about . 08% (w / v) , about . 09% (w / v) , about . 1% (w / v) , about . 2% (w / v) , about . 3% (w / v) , about . 4% (w / v) , about . 5% (w / v) , about . 6% (w / v) , about . 7% (w / v) , about . 8% (w / v) , about . 9% (w / v) , about 1% (w / v) , about 2% (w / v) , about 3% (w / v) , about 4% (w / v) , about 5% (w / v) , about 6% (w / v) , about 7% (w / v) , about 8% (w / v) , about 9% (w / v) , or about 10% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of about 5% (w / v) , about 6% (w / v) , about 7% (w / v) , about 8% (w / v) , about 9% (w / v) , or about 10% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of about . 01% (w / w) , about . 02% (w / v) , about . 03% (w / v) , about . 04% (w / v) , or about . 05% (w / v) . In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of about . 02% (w / v) .
[0227] In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of about 1% (w / w) , about 2% (w / w) , about 3% (w / w) , about 4% (w / w) , about 5% (w / w) , about 6% (w / w) , about 7% (w / w) , about 8% (w / w) , about 9% (w / w) , or about 10% (w / w) . In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of about 5% (w / w) , about 6% (w / w) , about 7% (w / w) , about 8% (w / w) , about 9% (w / w) , or about 10% (v) . In some aspects, a pharmaceutical composition described herein can comprise a surfactant in a concentration of about 5% (w / w) . In some aspects, a pharmaceutical composition described herein can comprise polysorbate 80. In some aspects, a pharmaceutical composition described herein can comprise polysorbate 80 in a concentration of about 5% (w / w) .
[0228] In some aspects, a pharmaceutical composition of the disclosure comprises a tonicity agent. In some aspects, the tonicity agent comprises sorbitol. Other tonicity agents can include sucrose, mannitol, trehalose or other tonicity modifying agents.
[0229] In some aspects, a pharmaceutical composition of the disclosure further comprises one or more preservatives in a concentration of from about 0.001% (w / v) to about 1% (w / v) based on the total volume of the liquid formulation. In some aspects, the preservative is from about 0.001% (w / v) to about 0.5% (w / v) , or from about 0.001% (w / v) to about 0.1% (w / v) , or from about 0.001% (w / v) to about 0.05% (w / v) , or from about 0.001% (w / v) to about 0.01% (w / v) . In some aspects, the preservative is m-cresol, phenol, and / or benzyl alcohol. In some aspects, the preservative is m-cresol. In some aspects, the preservative is phenol or benzyl alcohol.
[0230] In some aspects, a formulation of the disclosure is substantially free of any impurities. In some aspects, the formulation has about 10%or less of total impurities, about 8.0%or less of total impurities, about 9.0%or less of total impurities, about 7.0%or less of total impurities, about 6.0%or less of total impurities, about 5.0%or less of total impurities, about 4.0%or less of total impurities, about 3.0%or less of total impurities, about 2.0%or less of total impurities, or about 1.0%or less of total impurities. In some aspects, the formulation has about 5.0%or less of any one impurity, about 4.0%or less of any one impurity, about 3.5%or less of any one impurity, about 3.0%or less of any one impurity, about 2.5%or less of any one impurity, about 2.0%or less of any one impurity, about 1.5%or less of any one impurity, about 1.0%or less of any one impurity, about 0.5%or less of any one impurity, about 0.25%or less of any one impurity, or about 0.1%or less of any one impurity.
[0231] In some aspects, a pharmaceutical composition of the disclosure has an osmolality of no more than 400 mOsm / kg. In some aspects, the pharmaceutical composition of the disclosure has an osmolality of no more than 390 mOsm / kg. In some aspects, the pharmaceutical composition of the disclosure has an osmolality of no more than 380 mOsm / kg. In some aspects, the pharmaceutical composition of the disclosure has an osmolality of no more than 370 mOsm / kg. In some aspects, the pharmaceutical composition of the disclosure has an osmolality of no more than 360 mOsm / kg. In some aspects, the pharmaceutical composition of the disclosure has an osmolality of no more than 350 mOsm / kg. In one aspect, the formulation of the disclosure has a viscosity of from about 10 to about 60 cP. In one aspect, the formulation of the disclosure has a syringeability of Break Loose Force of less than 10 N and Glide Force of less than 30 N. In one aspect, the formulation of the disclosure causes no or little injection site reaction, e.g., irritation.
[0232] In one aspect, the formulation of the disclosure is stable for at least up to 5 freeze / thaw cycles. In another aspect, the formulation of the disclosure is stable after storage at 5 ℃ and 25 ℃ for 3 months. In another aspect, the formulation of the disclosure is stable after storage at 40 ℃ for 4 weeks. In another aspect, the formulation of the disclosure is stable after storage at 5 ℃ and 25 ℃ for 3 months and 40 ℃ for 1 month.
[0233] In some aspects, a stock solution can comprise a multispecific antibody or antigen binding fragment thereof described herein in a formulation buffer. In some aspects, the formulation buffer can be 20 mM histidine buffer, 8% (w / v) Sucrose, 0.02% (w / v) PS80, 10 mM L-Methionine, pH 5.2. In some aspects, a 5% (w / w) polysorbate 80 (PS80) stock buffer for adjusting to a final PS80 concentration of 0.02% (w / v) , and a stock solution of 200 mM (2.872%w / w) L-methionine for adjusting the concentration of L-methionine to 10 mM can be added to the formulation buffer.
[0234] In some aspects, the pharmaceutical composition described herein can comprise from about 1.00 mg / mL to about 100 mg / mL TM62, buffer exchanged into acetate or histidine buffer, and mixed well with stock solutions of 40% (w / v) sucrose, 5% (w / w) PS80, 5% (w / w) PS20, 5% (w / w) P188 and 100 mM L-methionine. In such aspects, the required amounts of DS, excipient stock solutions and surfactant stock solution can be calculated, weighed, and well-mixed and adjusted to target pH with 1M HCl. Such formulation solutions can be filtered with, e.g., a 0.22 μm polyvinylidene fluoride (PVDF) filter and filled into 2 mL glass vials (2 mL per vial) .
[0235] In some aspects, the present disclosure provides a multidose container comprising a stable liquid formulation of the pharmaceutical composition described herein.
[0236] In some aspects, the pharmaceutical composition described herein can comprise from about 1.00 mg / mL to about 100 mg / mL TM62, buffer exchanged into 20 mM acetate buffer (pH 5.2) mixed well with stock solutions of 40% (w / v) sucrose, 5% (w / w) PS80, 5% (w / w) PS20, 5%(w / w) P188, and 100 mM L-methionine.
[0237] In some aspects, the present disclosure provides a liquid formulation comprising a multispecific antibody and a pharmaceutically acceptable excipient.
[0238] In some aspects, the present disclosure provides a stabilized composition comprising a lyophllized formulation comprising a multispecific antibody of a multispecific antibody or antigen binding fragment thereof described herein and at least one excipient selected from a buffer.
[0239] In some aspects, the present disclosure provides a stabilized lyophilized formulation for reconstitution comprising a multispecific antibody of described herein, a buffer and a surfactant.
[0240] In some aspects, the pharmaceutical composition described herein comprises · TM62 in a concentration of from about 1 mg / mL to about 10 mg / mL · histidine buffer in a concentration of from about 5 mM to about 25 mM · sucrose in a concentration of from about 1% (w / v) to about 10% (w / v) · PS80 in a concentration of from about . 01% (w / v) to about . 10% (w / v) , and · L-Methionine in a concentration of from about 1 mM to about 10 mM wherein the pH is in a range of from about 5.1 to about 5.5.
[0241] In some aspects, the pharmaceutical composition described herein comprises · TM62 in a concentration of about 1 mg / mL · histidine buffer in a concentration of about 20 mM · sucrose in a concentration of about 8% (w / v) · PS80 in a concentration of about 0.02% (w / v) , and · L-Methionine in a concentration of about 10 mM wherein the pH is about 5.2.
[0242] In some aspects, provided herein is a method of making a pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof described herein, the method comprising adding to a formulation comprising the multispecific antibody or antigen binding fragment thereof and a formulation buffer, a stock solution of 5% (w / w) polysorbate 80 (PS80) to adjust the PS80 concentration of 0.02% (w / v) , and then adding a stock solution of 200 mM (2.872%w / w) L-methionine to adjust the concentration of L-methionine to 10 mM.In some aspects, the formulation buffer comprises 20 mM histidine buffer, 8% (w / v) Sucrose, 0.02% (w / v) PS80, 10 mM L-Methionine and has a pH of 5.2.
[0243] In some aspects, the pharmaceutical composition described herein comprises: a) the multispecific antibody or antigen binding fragment thereof described herein in a concentration of from about 0.1 mg / mL to about 50 mg / mL b) histidine buffer or acetate buffer in a concentration of from about 5 mM to about 25 mM c) sucrose in a concentration of from about 10% (w / v) to about 50% (w / v) d) surfactant in a concentration of from about 1% (w / v) to about 10% (w / v) , and e) L-Methionine in a concentration of from about 1 mM to about 100 mM wherein the pH is in a range of from about 5 to about 6.
[0244] In some aspects, the pharmaceutical composition described herein comprises: a) the multispecific antibody or antigen binding fragment thereof described herein in a concentration of from about 0.5 mg / mL to about 1.5 mg / mL b) histidine buffer or acetate buffer in a concentration of from about 15 mM to about 25 mM c) sucrose in a concentration of from about . 01% (w / v) to about 10% (w / v) d) surfactant in a concentration of from about 1% (w / v) to about 10% (w / v) , and e) L-Methionine in a concentration of from about 5 mM to about 15 mM wherein the pH is in a range of from about 5.1 to about 5.5.
[0245] In some aspects, the pharmaceutical composition described herein comprises: a) the multispecific antibody or antigen binding fragment thereof described herein in a concentration of about 1 mg / mL b) histidine buffer in a concentration of about 20 mM c) sucrose in a concentration of about 8% (w / v) d) PS80 in a concentration of about . 02% (w / v) , and e) L-Methionine in a concentration of about 10 mM wherein the pH is about 5.2.
[0246] In some aspects, the pharmaceutical composition is lyophilized. In some aspects, the lyophilized pharmaceutical composition is reconstituted with water for injection (WFI) . In some aspects, the reconstituted product is diluted in normal saline to target dose levels per a pharmacy manual or final clinical protocol.
[0247] In some aspects, the pharmaceutical composition comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein; a buffer; a binder; a stabilizer and / or antioxidant; and a surfactant. In some aspects, the pharmaceutical composition comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein; histidine; sucrose; methionine; and polysorbate 80. In some aspects, the pharmaceutical composition comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , or cell (s) described herein; about 20 mM histidine (e.g., pH 5.2 with 8%sucrose) ; about 10 mM L-methionine; and about 0.02%polysorbate 80.
[0248] The present disclosure further provides a process of preparing a salt of a multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 described herein, comprising (a) dissolving said multispecific antibody or antigen binding fragment thereof complex in a buffer solution to form a polypeptide complex solution, wherein the buffer solution has a pH value of about 4.7 to about 6.5; (b) adding a salt solution; (c) isolating the protein by precipitation; (d) purifying the crude product on a SEC column, followed by concentration and lyophilization to provide the salt of the multispecific antibody or antigen binding fragment thereof described herein. In some aspects, the buffer solution in the process for preparing a salt of the disclosure is selected from the group consisting of an acetate buffer solution, a citrate buffer solution, and a histidine buffer solution. In some aspects, the buffer solution is an acetate buffer solution. In one aspect, the buffer solution is a citrate buffer solution. In one aspect, the buffer solution is a histidine buffer solution. In some aspects, the salt solution in the process for preparing a salt of the disclosure includes but is not limited to ammonium sulfate, sodium chloride, and potassium chloride. In some aspects, purifying the product involves separating the protein based on size. In some aspects, purifying comprises performing size exclusion high performance liquid chromatography (SE-HPLC) , for example, on an Agilent HPLC system with a SEC column (Vendor: Tosoh; Cat. No. TSKGel G3000SWXL, 300×7.8 mm, 5 μm) . In some aspects, purifying the product comprises performing size exclusion ultra-performance liquid chromatography (SE-UPLC) , for example on a Waters UPLC system with a SEC column (Waters ACQUITY UPLC Protein BEH, 150×4.6 mm, 1.7 μm) .
[0249] The present disclosure further encompasses the formulations with additional pharmaceutically acceptable ( "Generally recognized as safe reagents" or "GRAS" ) excipients such as surfactants or tonicity agents or other pharmaceutically acceptable additives. These can include, for example, methionine, arginine, sorbitol, sucrose, non-ionic surfactants (Poloxamers and polysorbates) or similar excipients. In some aspects, the formulation of the disclosure contains about 10.0%or less of total impurities and less than about 5%of any single individual impurity measured by RP-HPLC. In some aspects, the formulation of the disclosure contains about 10.0%or less of total impurities and less than about 5%of any single individual impurity measured by size exclusion chromatography.
[0250] In some aspects, the formulation of the disclosure is substantially free of a destabilizing substance.
[0251] In some aspects, a pharmaceutical composition described herein comprises about 1 mg / mL of the multispecific antibody or antigen binding fragment thereof.
[0252] In other aspects, the disclosure is directed to a kit comprising a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , cell (s) , or pharmaceutical composition described herein, or a combination thereof. Once a pharmaceutical composition has been formulated, it can be stored in sterile vials as a solution, suspension, gel, emulsion, solid, crystal, or as a dehydrated or lyophilized powder. Such formulations may be stored either in a ready-to-use form or in a form (e.g., lyophilized) that is reconstituted prior to administration. In some aspects, the disclosure provides kits for producing a single-dose administration unit. In some aspects, the kits of the disclosure can contain both a first container having a dried protein and a second container having an aqueous formulation. In some aspects, kits containing single and multi-chambered pre-filled syringes (e.g., liquid syringes and lyosyringes) are also provided. In some aspects, the kit contains components for intravenous or subcutaneous administration.
[0253] In some aspects, the kit comprises a multispecific antibody or antigen binding fragment thereof, polypeptide (s) , polynucleotide (s) , vector (s) , cell (s) , or pharmaceutical composition described herein; and instructions for use, for example, in any of the methods of use and / or dosing regimens described herein.
[0254] In some aspects, the disclosure is directed to a method of making a multispecific antibody or antigen binding fragment thereof, comprising (a) culturing a cell expressing the multispecific antibody or antigen binding fragment thereof; and (b) isolating the antibody from the cultured cell. In some aspects, the cell is a eukaryotic cell. In some aspects, the cell is a Chinese hamster ovary (CHO) cell. Modifications
[0255] In some aspects, the disclosure is directed to a multispecific antibody or antigen binding fragment thereof comprising an effector function mutation or half-life extension mutation.
[0256] The antibody Fc region regulates antibody cytotoxic activities and serum half-life. Fc-mediated effector functions are an important part of the humoral immune response and form a link between innate and adaptive immunity. As used herein, an "effector function mutation" refers to a change in the amino acid sequence, typically in the Fc region, which increases or decreases effector function, for example, increasing binding affinity of Fc for specific Fc receptors, or increasing antibody-dependent cellular cytotoxicity (ADCC) activity. Most effector functions are induced via the Fc region of an antibody, which can interact with complement proteins and specialized Fc receptors.
[0257] The most well-known Fc-mediated antibody effector functions are antibody-dependent cell-mediated cytotoxicity (ADCC) , antibody-dependent cellular phagocytosis (ADCP) , and complement-dependent cytotoxicity (CDC) . In some cases, the cytotoxic effector function (s) of an antibody is undesirable because it can activate native host immune defenses against cells expressing the receptor antigens. Accordingly, mutations which reduce or eliminate antibody effector function can be beneficial, for example, to prevent target cell death, unwanted cytokine secretion, or interaction with FcγRs leading to off-target cytotoxicity. Several amino acid changes in the Fc region are known to silence or reduce the effector function of antibodies.
[0258] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can possess engineered IgG1 Fc-null mutations designed to eliminate or significantly reduce Fc effector functions. By way of example, in some aspects, binding of the multispecific antibody or antigen binding fragment thereof to human FcRs (e.g., FcγRIIIa, FcγRIIIb, FcγRIIa, FcγRIIb and / or FcγRI) can be reduced as a result of such mutations. In some aspects, the disclosure is directed to a multispecific antibody or antigen binding fragment thereof having reduced Fc effector function. Binding to human FcRs can be confirmed by in vitro assays such as Bio-Layer Interferometry (BLI) .
[0259] In some aspects, the multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 can comprise (a) a VL1 that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and a VH1 that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20;and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24, wherein the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.
[0260] In some aspects, the present disclosure provides a multispecific antibody or antigen binding fragment thereof comprising (a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and a VH1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32, wherein the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.
[0261] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide comprises the amino acid sequence of SEQ ID NO: 33, and the second polypeptide comprises the amino acid sequence of SEQ ID NO: 34, and wherein the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.
[0262] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide is encoded by the polynucleotide sequence of SEQ ID NO: 35, and the second polypeptide is encoded by the polynucleotide sequence of SEQ ID NO: 36, and wherein the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.
[0263] In some aspects of the multispecific antibody or antigen binding fragment thereof disclosed herein, the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45, the hole side of the Fc region comprises the amino acid sequence of SEQ ID NO: 46, and the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.
[0264] "Half-life" of a pharmaceutically active substance is the time it takes for the amount of the substance, once administered to the body, to reduce by half. A "half-life extension mutation" of an antigen binding polypeptide complex of the disclosure refers to a change in the amino acid sequence, typically in the Fc region, which increases the half-life of the antigen binding polypeptide complex (e.g., by increasing Fc receptor binding affinity, slowing off-rate for Fc and Fc receptors, and / or increased sialylation) .
[0265] Examples of effector function mutations that increase function include, but are not limited to, the following substitutions in the Fc region, based on the EU numbering scheme: S298A / E333A / K334A, S239D / I332E, S239D / A330L / I332E, and G236A / S239D / I332E. Examples of effector function mutations that decrease function include, but are not limited to, the following substitutions in the Fc region, based on the EU numbering scheme: N297A and L234A / L235A. Additional examples of effector function mutations, half-life extension mutations and methods for incorporating the same into an amino acid sequence are known and described, for example, in Saunders, "Conceptual Approaches to Modulating Antibody Effector Functions and Circulation Half-Life, " Front. Immunol. June 7, 2019. In some aspects, the disclosure is directed to a multispecific antibody or antigen binding fragment thereof comprising one or more knob-into-hole modifications.
[0266] The term "knob-into-hole modification" as used herein, refers to a genetic modification that directs the pairing of two polypeptides to promote heterodimerization. In some aspects, the modification introduces a protuberance (knob) into one polypeptide and a cavity (hole) into the other polypeptide at an interface in which the two polypeptides interact. In some aspects, a knob-into-hole modification can be created by introducing only a hole modification, for example, by replacing an amino acid residue with a smaller side chain than the original amino acid residue (e.g., a substitution of one or more serine, threonine, valine or alanine residues, or a combination thereof) . In yet another aspect, a knob-into-hole modification can be created by introducing only a knob modification, for example, by replacing an amino acid residue with a larger side chain than the original amino acid residue (e.g., a substitution of one or more tryptophan or tyrosine residues, or a combination thereof) .
[0267] In some aspects, the knob-into-hole modification is in the binding interface of two Fc regions, the binding interface of two CH2 regions, the binding interface of two CH3 regions, the binding interface of a CL region and a CH1 region, or the binding interface of a VH region and a VL region. See, e.g., U.S. Pub. No. 2007 / 0178552, Int'l Pub. No. WO 96 / 027011, Int'l Pub. No. WO 98 / 050431 and Zhu et al., Protein Science 6: 781-788, 1987.
[0268] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises one, two, three, four, five, six, seven, eight, nine, ten, or more knob-into-hole modifications.
[0269] Knob-into-hole modifications are well known and can be incorporated into the multispecific antibody or antigen binding fragment thereof of the disclosure using routine molecular biology and recombinant DNA techniques. See, e.g., U.S. Pub. No. 2003 / 0078385; Int'l Pub. No. WO 96 / 027011; Ridgway et al., Protein Eng., 9: 617-621, 1996; and Merchant et al., Nat. Biotechnol., 16: 677-681, 1998.
[0270] In some aspects, the knob-into-hole modification is an amino acid substitution. As used herein, such a substitution is described based on the EU numbering scheme of Kabat, which corresponds to the numbering in the Protein Data Bank (PDB) .
[0271] In some aspects, the knob-into-hole modification is a knob substitution of S354C and / or T366W, based on the EU numbering scheme.
[0272] In some aspects, the knob-into-hole modification is a hole substitution of Y349C, T366S, L368A, Y407V, L234A, L235A, P329A, M428L, N433S, M252Y, S254T, T256E, or any combination thereof, based on the EU numbering scheme.
[0273] In some aspects, the knob-into-hole modifications are hole substitutions of Y349C, T366S, L368A and Y407V, based on the EU numbering scheme. In some aspects, the knob-into-hole modifications are a hole substitutions of L234A, L235A and P329A, based on the EU numbering scheme. In some aspects, the knob-into-hole modifications are hole substitutions of L234A and L235A, based on the EU numbering scheme. In some aspects, the knob-into-hole modifications are hole substitutions of M428L and N433S, based on the EU numbering scheme. In some aspects, the knob-into-hole modifications are hole substitutions of M252Y, S254T and T256E, based on the EU numbering scheme.
[0274] In some aspects, the multispecific antibody or antigen binding fragment thereof is an IgG1 or IgG4 antibody and the knob-into-hole modifications are knob substitutions of S354C and T366W and hole substitutions of Y349C, T366S, L368A and Y407V.
[0275] In some aspects, the multispecific antibody or antigen binding fragment thereof is an IgG1 or IgG4 antibody and the knob-into-hole modifications are hole substitutions of L234A, L235A and P329A.
[0276] In some aspects, the multispecific antibody or antigen binding fragment thereof is an IgG1 or IgG4 antibody and the knob-into-hole modifications are hole substitutions of L234A and L235A.
[0277] In some aspects, the multispecific antibody or antigen binding fragment thereof is an IgG1 or IgG4 antibody and the knob-into-hole modifications are hole substitutions of M428L and N433S.
[0278] In some aspects, the multispecific antibody or antigen binding fragment thereof is an IgG1 or IgG4 antibody and the knob-into-hole modifications are hole substitutions of M252Y, S254T and T256E.
[0279] In some aspects of the multispecific antibody or antigen binding fragment thereof disclosed herein, the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45. In some aspects of the multispecific antibody or antigen binding fragment thereof disclosed herein, the hole side of the Fc region comprises the amino acid sequence of SEQ ID NO: 46. Binding Affinity
[0280] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to cMet, Trop2, CD28, and CD3 with binding affinities described herein. In some aspects, binding affinity can be measured by Biolayer interferometry (BLI) . For example, in some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to cMet with a Kd of about 1.0 nM to about 10 nM. In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to cMet with a Kd of about 2 nM to about 8 nM. In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to cMet with a Kd of about 3 nM to about 5 nM. In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to cMet with a Kd of about 3 nM to about 4 nM (e.g., about 3.0 nM, about 3.1 nM, about 3.2 nM, about 3.3 nM, about 3.4 nM, about 3.5 nM, about 3.6 nM, about 3.7 nM, about 3.8 nM, about 3.9 nM, or about 4.0 nM) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to cMet with a Kd of about 3.1 nM. In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to cMet with a Kd of about 3.2 nM.
[0281] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to Trop2 with a Kd of about 30 nM to about 50 nM. In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to Trop2 with a Kd of about 40 nM to about 50 nM (e.g., about 40 nM, about 41 nM, about 42 nM, about 43 nM, about 44 nM, about 45 nM, about 46 nM, about 47 nM, about 48 nM, about 49 nM, or about 50 nM) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to Trop2 with a Kd of about 46 nM to about 47 nM (e.g., about 46.0 nM, about 46.1 nM, about 46.2 nM, about 46.3 nM, about 46.4 nM, about 46.5 nM, about 46.6 nM, about 46.7 nM, about 46.8 nM, about 46.9 nM, or about 47.0 nM) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to Trop2 with a Kd of about 46.3 nM.
[0282] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to CD28 with a Kd of about 10 nM to about 20 nM (e.g., about 10 nM, about 11 nM, about 12 nM, about 13 nM, about 14 nM, about 15 nM, about 16 nM, about 17 nM, about 18 nM, about 19 nM, or about 20 nM) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to CD28 with a Kd of about 13 nM to about 14 nM (e.g., about 13.1 nM, about 13.2 nM, about 13.3 nM, about 13.4 nM, about 13.5 nM, about 13.6 nM, about 13.7 nM, about 13.8 nM, about 13.9 nM, or about 14 nM) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to CD28 with a Kd of about 13.8 nM.
[0283] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to CD3 with a Kd of about 10 nM to about 30 nM. In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to CD3 with a Kd of about 20 nM to about 30 nM (e.g., about 20 nM, about 21 nM, about 22 nM, about 23 nM, about 24 nM, about 25 nM, about 26 nM, about 27 nM, about 28 nM, about 29 nM, or about 30 nM) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to CD3 with a Kd of about 27 nM to about 28 nM (e.g., about 27.1 nM, about 27.2 nM, about 27.3 nM, about 27.4 nM, about 27.5 nM, about 27.6 nM, about 27.7 nM, about 27.8 nM, about 27.9 nM, or about 28 nM) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind to CD3 with a Kd of about 27.2 nM.
[0284] In some aspects, the multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 can comprise (a) a VL1 that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and a VH1 that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; wherein the multispecific antibody or antigen binding fragment thereof binds to cMet with a Kd of about 1.0 nM to about 10 nM, (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9, ; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; wherein the multispecific antibody or antigen binding fragment thereof binds to Trop2 with a Kd of about 30 nM to about 50 nM, (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15, ; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; wherein the multispecific antibody or antigen binding fragment thereof binds to CD28 with a Kd of about 10 nM to about 20 nM, and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21,; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24, wherein the multispecific antibody or antigen binding fragment thereof binds to CD3 with a Kd of about 10 nM to about 30 nM.
[0285] In some aspects, the present disclosure provides a multispecific antibody or antigen binding fragment thereof comprising (a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and a VH1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26, wherein the multispecific antibody or antigen binding fragment thereof binds to cMet with a Kd of about 1.0 nM to about 10 nM; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28, wherein the multispecific antibody or antigen binding fragment thereof binds to Trop2 with a Kd of about 30 nM to about 50 nM; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30, wherein the multispecific antibody or antigen binding fragment thereof binds to CD28 with a Kd of about 10 nM to about 20 nM; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32, wherein the multispecific antibody or antigen binding fragment thereof binds to CD3 with a Kd of about 10 nM to about 30 nM.
[0286] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide comprises the amino acid sequence of SEQ ID NO: 33, and the second polypeptide comprises the amino acid sequence of SEQ ID NO: 34, and wherein the multispecific antibody or antigen binding fragment thereof binds to cMet with a Kd of about 1.0 nM to about 10 nM; binds to Trop2 with a Kd of about 30 nM to about 50 nM; binds to CD28 with a Kd of about 10 nM to about 20 nM; and binds to CD3 with a Kd of about 10 nM to about 30 nM.
[0287] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide is encoded by the polynucleotide sequence of SEQ ID NO: 35, and the second polypeptide is encoded by the polynucleotide sequence of SEQ ID NO: 36, and wherein the multispecific antibody or antigen binding fragment thereof binds to cMet with a Kd of about 1.0 nM to about 10 nM; binds to Trop2 with a Kd of about 30 nM to about 50 nM; binds to CD28 with a Kd of about 10 nM to about 20 nM; and binds to CD3 with a Kd of about 10 nM to about 30 nM.
[0288] In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can be designed to maintain a natural antibody's pH-dependent binding dynamic to FcRn. For example, in some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind human FcRn at a pH ranging from about 6.0 to about 8.0 (e.g., at about 5.5, about 5.6, about 5.7, about 5.8, about 5.9, about 6.0, about 6.1, about 6.2, about 6.3, about 6.4, about 6.5, about 6.6, about 6.7, about 6.8, about 6.9, about 7.0, about 7.1, about 7.2, about 7.3, about 7.4, about 7.5, about 7.6, about 7.7, about 7.8, about 7.9 or about 8.0) . In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind human FcRn at a pH of about 6.0. In some aspects, the multispecific antibody or antigen binding fragment thereof described herein can bind human FcRn at a pH of about 7.4. Polynucleotides, Vectors, Cells, and Protein Production Methods
[0289] In some aspects, the disclosure provides a polypeptide having at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identity to any one of SEQ ID NOs: 1-34, 45 or 46.
[0290] In some aspects, the disclosure provides a polynucleotide having at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identity to SEQ ID NOs: 35.
[0291] In some aspects, the disclosure provides a polynucleotide having at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100%identity to SEQ ID NO: 36.
[0292] In other aspects, the disclosure is directed to a vector comprising one or more polynucleotides described herein (e.g., SEQ ID NO: 35 and / or SEQ ID NO: 36) .
[0293] In yet other aspects, the disclosure is directed to a host cell or population of host cells comprising one or more polynucleotides and / or vectors described herein. For example, the host cell or may comprise one or more polynucleotide described herein. For example, the host cell may comprise one or more vectors described herein.
[0294] As used herein, the term "host cell" can be any type of cell, e.g., a primary cell, a cell in culture, or a cell from a cell line. In some aspects, the term "host cell" refers to a cell containing a foreign gene [e.g., a cell subjected to gene delivery or transfected with a polynucleotide (e.g., DNA or mRNA) encoding the gene] and the progeny or potential progeny of such a cell. Progeny of such a cell may not be identical to the parent cell transfected with the nucleic acid molecule, e.g., due to mutations or environmental influences that may occur in succeeding generations or integration of the nucleic acid molecule into the host cell genome.
[0295] Methods which are well known to those skilled in the art can be used to construct vectors encoding antigen binding polypeptide complexes (e.g., CDR, VH, VL, heavy chain and / or light chain coding sequences and appropriate transcriptional and translational control signals) . These methods include, for example, in vitro recombinant DNA techniques, synthetic techniques, and in vivo genetic recombination.
[0296] A vector can be transferred to a host cell by conventional techniques and the resulting cells can then be cultured by conventional techniques to produce an antigen binding polypeptide complex comprising, e.g., six CDRs, VH, VL, VH and VL, heavy chain, light chain, or heavy and light chain, or a domain thereof (e.g., one or more CDRs, VH, VL, VH and VL, heavy chain, or light chain) . Thus, provided herein are host cells containing a polynucleotide encoding an antigen binding polypeptide complex comprising, e.g., comprising six CDRs, VH, VL, VH and VL, heavy chain, light chain, or heavy and light chain, or a domain thereof (e.g., one or more CDRs, VH, VL, VH and VL, heavy chain, or light chain) , operably linked to a promoter for expression of such sequences in the host cell. In some aspects, vectors encoding both heavy and light chains, or a domain thereof, individually, can be co-expressed in the host cell for expression. In some aspects, a host cell contains a vector comprising a polynucleotide encoding both a heavy chain and light chain, or a domain thereof. In some aspects, a host cell contains two different vectors, a first vector comprising a polynucleotide encoding a heavy chain or a domain thereof, and a second vector comprising a polynucleotide encoding a light chain or a domain thereof. In some aspects, a first host cell comprises a first vector comprising a polynucleotide encoding a heavy chain or a domain thereof, and a second host cell comprises a second vector comprising a polynucleotide encoding a light chain or a domain thereof. In some aspects, provided herein is a population of host cells comprising such a first host cell and such a second host cell.
[0297] In some aspects, provided herein is a population of vectors comprising a first vector comprising a polynucleotide encoding a light chain or domain thereof, and a second vector comprising a polynucleotide encoding a heavy chain or domain thereof. Alternatively, a single vector can be used which encodes, and is capable of expressing, both heavy and light chain polypeptides or a domain thereof.
[0298] A variety of host-vector systems can be utilized to express the polypeptides and polypeptide complexes described herein. Such host-vector systems represent vehicles by which the coding sequences of interest can be produced and subsequently purified, but also represent cells which can, when transformed or transfected with the appropriate nucleotide coding sequences, express a polypeptide or polypeptide complex described herein in situ. These include but are not limited to microorganisms such as bacteria (e.g., E. coli and B. subtilis) transformed with recombinant bacteriophage DNA, plasmid DNA or cosmid DNA expression vectors containing antibody coding sequences; yeast (e.g., Saccharomyces pichia) transformed with recombinant yeast expression vectors containing antibody coding sequences; insect cell systems infected with recombinant virus expression vectors (e.g., baculovirus) containing antibody coding sequences; plant cell systems (e.g., green algae such as Chlamydomonas reinhardtii) infected with recombinant virus expression vectors (e.g., cauliflower mosaic virus, CaMV; tobacco mosaic virus, TMV) or transformed with recombinant plasmid expression vectors (e.g., Ti plasmid) containing antibody coding sequences; or mammalian cell systems (e.g., COS (e.g., COS1 or COS) , CHO, BHK, MDCK, HEK 293, NS0, PER. C6, VERO, CRL7O3O, HsS78Bst, HeLa, and NIH 3T3, HEK-293T, HepG2, SP210, R1.1, B-W, L-M, BSC1, BSC40, YB / 20, and BMT10 cells) harboring recombinant expression constructs containing promoters derived from the genome of mammalian cells (e.g., metallothionein promoter) or from mammalian viruses (e.g., the adenovirus late promoter; the vaccinia virus 7.5K promoter) . In some aspects, cells for expressing polypeptide or polypeptide complexes described herein are CHO cells, for example CHO cells from the CHO GS SystemTM (Lonza) . In some aspects, cells for expressing polypeptides or polypeptide complexes of the disclosure are human cells, e.g., human cell lines. In some aspects, a mammalian expression vector is pOptiVECTM or pcDNA3.3. In some aspects, bacterial cells such as Escherichia coli, or eukaryotic cells (e.g., mammalian cells) are used for the expression of recombinant polypeptides. For example, mammalian cells such as Chinese hamster ovary (CHO) cells in conjunction with a vector such as the major intermediate early gene promoter element from human cytomegalovirus is an effective expression system for polypeptides (Foecking MK &Hofstetter H (1986) Gene 45: 101-105; and Cockett MI et al., (1990) Biotechnology 8: 662-667) . In some aspects, polypeptides or polypeptide complexes described herein are produced by HEK-293T cells.
[0299] In addition, a host cell strain can be chosen which modulates the expression of the inserted sequences, or modifies and processes the gene product in the specific fashion desired. Such modifications (e.g., glycosylation) and processing (e.g., cleavage) of protein products can contribute to the function of the protein. To this end, eukaryotic host cells which possess the cellular machinery for proper processing of the primary transcript, glycosylation, and phosphorylation of the gene product can be used. Such mammalian host cells include but are not limited to CHO, VERO, BHK, Hela, MDCK, HEK 293, NIH 3T3, W138, BT483, Hs578T, HTB2, BT2O and T47D, NS0 (amurine myeloma cell line that does not endogenously produce any immunoglobulin chains) , CRL7O3O, COS (e.g., COS1 or COS) , PER. C6, VERO, HsS78Bst, HEK-293T, HepG2, SP210, R1.1, B-W, L-M, BSC1, BSC40, YB / 20, BMT10 and HsS78Bst cells.
[0300] Once a polypeptide described herein has been produced by recombinant expression, it can be purified by any method known in the art for purification of a protein or immunoglobulin molecule, for example, by chromatography (e.g., ion exchange, affinity, particularly by affinity for the specific antigen after Protein A, and size exclusion chromatography) , centrifugation, differential solubility, or by any other standard technique for the purification of proteins. Further, the polypeptides described herein can be fused to heterologous polypeptide sequences described herein (e.g., tags) or otherwise known in the art to facilitate purification.
[0301] In some aspects, a polypeptide described herein is isolated or purified. Generally, an isolated polypeptide or polypeptide complex is one that is substantially free of other polypeptides or polypeptide complexes with different antigenic specificities. For example, in some aspects, a preparation of a polypeptide or polypeptide complex described herein is substantially free of cellular material and / or chemical precursors. Methods of Use
[0302] Multispecific antibodies or antigen binding fragments thereof are useful, for example, in treating human cancers, e.g., solid cancers. Accordingly, the present disclosure relates to a dosage regimen for administering a multispecific antibody or antigen binding fragment thereof, e.g., TM62, to a human patient to treat a cancer.
[0303] In some aspects, the present disclosure provides a method of treating a patient having a disease or condition, e.g., cancer, comprising administering to the patient a pharmaceutically effective amount of a multispecific antibody formulation of the disclosure by subcutaneous administration wherein the effective weekly dose of the multispecific antibody ranges from about 0.0004 mg / kg of body weight of the subject to about 1.6 mg / kg of body weight of the subject. In some aspects, a pharmaceutically effective amount of a multispecific antibody formulation described herein is administered to the subject two, three, or four times within a 28-day treatment cycle.
[0304] In one aspect, the stable liquid formulation of the disclosure is administered to the patient from suitable containers (vials, pre-filled syringes, cartridges, etc. ) and at suitable dosages ranging from about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject, twice a week or once a week or at longer dosage intervals. In some aspects, a stable liquid formulation of the disclosure is administered to the patient at suitable dosages ranging from about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject, one, two, three, or up to four times during a 28-day treatment cycle.
[0305] In some aspects, the dosage amounts may change depending upon the weight of the patient and the nature and severity of the disease condition or state, and dose may be titrated from lower initial dose to higher dose.
[0306] In some aspects, the disclosure is directed to a method for treating a cancer in a human subject, the method comprising administering to the subject a multispecific antibody or antigen binding fragment thereof, wherein the multispecific antibody or antigen binding fragment thereof is administered at a dose of about 0.0001 to about 2 milligrams per kilogram (mg / kg) of body weight of the subject, e.g., about 0.0001 mg / kg, about 0.0002 mg / kg, about 0.0003 mg / kg, about 0.0004 mg / kg, about 0.0005 mg / kg, about 0.0006 mg / kg, about 0.0007 mg / kg, about 0.0008 mg / kg, about 0.0009 mg / kg, about 0.001 mg / kg, about 0.002 mg / kg, about 0.003 mg / kg, about 0.004 mg / kg, about 0.005 mg / kg, about 0.006 mg / kg, about 0.007 mg / kg, about 0.008 mg / kg, about 0.009 mg / kg, about 0.01 mg / kg, about 0.02 mg / kg, about 0.03 mg / kg, about 0.04 mg / kg, about 0.05 mg / kg, about 0.06 mg / kg, about 0.07 mg / kg, about 0.08 mg / kg, about 0.09 mg / kg, about 0.1 mg / kg, about 0.2 mg / kg, about 0.3 mg / kg, about 0.4 mg / kg, about 0.5 mg / kg, about 0.6 mg / kg, about 0.7 mg / kg, about 0.8 mg / kg, about 0.9 mg / kg, about 1.0 mg / kg, about 1.1 mg / kg, about 1.2 mg / kg, about 1.3 mg / kg, about 1.4 mg / kg, about 1.5 mg / kg, about 1.6 mg / kg, about 1.7 mg / kg, about 1.8 mg / kg, about 1.9 mg / kg, or about 2.0 mg / kg of body weight of the subject.
[0307] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0003 to about 0.0005 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0003 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0005 mg / kg of body weight of the subject.
[0308] In some aspects, a starting dose of the multispecific antibody or antigen binding fragment thereof can be increased from the starting dose to a therapeutically effective dose of from about 0.0005 mg / kg to about 1.6 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a therapeutically effective dose of about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.0005 mg / kg, about 0.0006 mg / kg, about 0.0007 mg / kg, about 0.0008 mg / kg, about 0.0009 mg / kg, about 0.001 mg / kg, about 0.002 mg / kg, about 0.003 mg / kg, about 0.004 mg / kg, about 0.005 mg / kg, about 0.006 mg / kg, about 0.007 mg / kg, about 0.008 mg / kg, about 0.009 mg / kg, about 0.01 mg / kg, about 0.02 mg / kg, about 0.03 mg / kg, about 0.04 mg / kg, about 0.05 mg / kg, about 0.06 mg / kg, about 0.07 mg / kg, about 0.08 mg / kg, about 0.09 mg / kg, about 0.1 mg / kg, about 0.2 mg / kg, about 0.3 mg / kg, about 0.4 mg / kg, about 0.5 mg / kg, about 0.6 mg / kg, about 0.7 mg / kg, about 0.8 mg / kg, about 0.9 mg / kg, about 1.0 mg / kg, about 1.1 mg / kg, about 1.2 mg / kg, about 1.3 mg / kg, about 1.4 mg / kg, about 1.5 mg / kg, about 1.6 mg / kg, about 1.7 mg / kg, about 1.8 mg / kg, about 1.9 mg / kg, or about 2.0 mg / kg of body weight of the subject.
[0309] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.0005 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.0012 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.036 mg / kg mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.011 mg / kg mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.033 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.1 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.3 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 0.6 mg / kg mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 1.2 mg / kg of body weight of the subject. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject and is increased to a therapeutically effective dose of about 1.5 mg / kg of body weight of the subject.
[0310] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject in a 28-day treatment cycle. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.0004 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.0012 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.036 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.011 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.033 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.1 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.3 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 0.6 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 1.2 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle. In some aspects, about 1.5 mg / kg of a multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle.
[0311] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and day 15 of the 28-day treatment cycle. In some aspects, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle.
[0312] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject three times within a treatment cycle. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, day 8, and day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle.
[0313] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject four times within a treatment cycle. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, day 4, day 8, and day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle.
[0314] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for one treatment cycle. In some aspects, one cycle of treatment is therapeutically effective. In some aspects, two cycles of treatment are therapeutically effective. In some aspects, one to four cycles of treatment are therapeutically effective. In some aspects, one to six cycles of treatment are therapeutically effective. In some aspects, one to eight cycles of treatment are therapeutically effective. In some aspects, one to ten cycles of treatment are therapeutically effective.
[0315] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for more than one treatment cycle. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for at least 2 treatment cycles, at least 3 treatment cycles, at least 4 treatment cycles, at least 5 treatment cycles, at least 6 treatment cycles, at least 7 treatment cycles, at least 8 treatment cycles, at least 9 treatment cycles, or at least 10 treatment cycles.
[0316] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered intravenously. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered as an intravenous infusion. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered as an intravenous infusion over two hours.
[0317] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered subcutaneously.
[0318] In some aspects, the disclosure is directed to methods of treating a solid cancer. In some aspects, the cancer is breast cancer, lung cancer, non-small cell lung cancer, esophageal cancer, thyroid cancer, well-differentiated thyroid cancer, head and neck cancer, bile duct cancer, biliary tract cancer, kidney cancer, gastric cancer, gastroesophageal junction cancer, prostate cancer, cervical cancer including cervical adenocarcinoma, endometrial cancer, bladder cancer, uterine cancer, stomach cancer, rectal cancer, colon cancer, liver cancer, urothelial cancer, renal cancer, hepatocellular cancer, pancreatic cancer, sarcoma, miscellaneous neuroepithelial cancer, ovarian epithelial cancer, pheochromocytoma, cervical squamous cell carcinoma, bladder urothelial carcinoma, prostate adenocarcinoma, invasive breast carcinoma, melanoma, non-seminomatous germ cell tumor, pleural mesothelioma, adrenocortical carcinoma, esophageal squamous cell carcinoma, glioblastoma, diffuse glioma, colorectal adenocarcinoma, esophagogastric adenocarcinoma, renal non-clear cell carcinoma, hepatocellular carcinoma, renal clear cell carcinoma, pancreatic adenocarcinoma, seminoma, thymic epithelial cancer, ocular melanoma, mature B-cell neoplasms, undifferentiated stomach adenocarcinoma, or cholangiocarcinoma.
[0319] In some aspects, the cancer is lung cancer. In some aspects, the cancer is breast cancer. In some aspects, the cancer is gastric cancer. In some aspects, the cancer is prostate cancer.
[0320] In some aspects, the disclosure is directed to methods of treating a hematological cancer. In some aspects, the hematological cancer is leukemia or lymphoma. In some aspects, the leukemia or lymphoma is B cell leukemia, B cell lymphoma, diffuse large B-cell lymphoma (DLBCL) Follicular lymphoma, Chronic lymphocytic leukemia (CLL) / small lymphocytic lymphoma (SLL) , Mantle cell lymphoma (MCL) , Burkitt lymphoma, Lymphoplasmacytic lymphoma (Waldenstrom macroglobulinemia) , prolymphocytic leukemia (PLL) , or hairy cell leukemia (HCL) .
[0321] In some aspects, the disclosure is directed to methods of treating a cancer by administering a multispecific antibody or antigen binding fragment thereof, wherein the multispecific antibody or antigen binding fragment thereof comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0322] In some aspects, the disclosure is directed to methods of treating a cancer by administering a multispecific antibody or antigen binding fragment thereof, wherein the multispecific antibody or antigen binding fragment thereof comprises: (a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and a VH1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0323] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide comprises an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 33, and the second polypeptide comprises an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 34.
[0324] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide is encoded by a polynucleotide at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 35, and the second polypeptide is encoded by a polynucleotide at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 36.
[0325] In some aspects, the multispecific antibody or antigen binding fragment thereof is a full-length antibody. In some aspects, the multispecific antibody or antigen binding fragment thereof the multispecific antibody or antigen binding fragment thereof comprises a fragment crystallizable (Fc) region. In some aspects, the multispecific antibody or antigen binding fragment thereof comprises an Fc region selected from the group consisting of a human IgG1 Fc region, a human IgG2a Fc region, a human IgG2b Fc region, a human IgG3 Fc region, and a human IgG4 Fc region. In some aspects, the human Fc region is an IgG1 Fc region.
[0326] In some aspects, the multispecific antibody or antigen binding fragment thereof has a knob-into-hole (KIH) structure in the Fc region. In some aspects, the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45, and the hole side of Fc region comprises the amino acid sequence of SEQ ID NO: 46.
[0327] In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof results in a decrease in the number of cancer cells in the subject.
[0328] In some aspects of the methods disclosed herein, the cytotoxicity of the multispecific antibody or antigen binding fragment thereof described herein to human cells can be measured by the half maximal effective concentration (EC50) . In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against lung cancer cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against breast cancer cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against gastric cancer cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against human prostate cancer cells.
[0329] In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce in vitro cytokine release in the presence of target cancer cells.
[0330] In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce interleukin (IL) -6 release in vitro in the presence of target cancer cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce interferon gamma (IFN-γ) release in vitro in the presence of target cancer cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce tumor necrosis factor alpha (TNF-α) release in vitro in the presence of target cancer cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce IL-2 release in vitro in the presence of target cancer cells.
[0331] In some aspects, the disclosure is directed to a method of inhibiting tumor growth in a human subject, the method comprising administering a therapeutically effective amount of a multispecific antibody or antigen binding fragment thereof to the subject, wherein the multispecific antibody or antigen binding fragment thereof is administered as an intravenous infusion every two weeks, in a 28-day treatment cycle, at a dose of about of about 0.0001 to about 2.0 milligrams mg per kilogram (mg / kg) of body weight of the subject (e.g., about 0.0001 mg / kg, about 0.0002 mg / kg, about 0.0003 mg / kg, about 0.0004 mg / kg, about 0.0005 mg / kg, about 0.0006 mg / kg, about 0.0007 mg / kg, about 0.0008 mg / kg, about 0.0009 mg / kg, about 0.001 mg / kg, about 0.002 mg / kg, about 0.003 mg / kg, about 0.004 mg / kg, about 0.005 mg / kg, about 0.006 mg / kg, about 0.007 mg / kg, about 0.008 mg / kg, about 0.009 mg / kg, about 0.01 mg / kg, about 0.02 mg / kg, about 0.03 mg / kg, about 0.04 mg / kg, about 0.05 mg / kg, about 0.06 mg / kg, about 0.07 mg / kg, about 0.08 mg / kg, about 0.09 mg / kg, about 0.1 mg / kg, about 0.2 mg / kg, about 0.3 mg / kg, about 0.4 mg / kg, about 0.5 mg / kg, about 0.6 mg / kg, about 0.7 mg / kg, about 0.8 mg / kg, about 0.9 mg / kg, about 1.0 mg / kg, about 1.1 mg / kg, about 1.2 mg / kg, about 1.3 mg / kg, about 1.4 mg / kg, about 1.5 mg / kg, about 1.6 mg / kg, about 1.7 mg / kg, about 1.8 mg / kg, about 1.9 mg / kg, or about 2.0 mg / kg of body weight of the subject) .
[0332] In some aspects, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject. In some aspects, about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.
[0333] In some aspects, the first administration of the multispecific antibody or antigen binding fragment thereof is on day 1 of the first 28-day treatment cycle and the second administration is on day 15 of the first 28-day treatment cycle.
[0334] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and day 15 of the 28-day treatment cycle. In some aspects, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle.
[0335] In some aspects, the first administration of the multispecific antibody or antigen binding fragment thereof is on day 1 of the first 28-day treatment cycle, the second administration is on day 8 of the first 28-day treatment cycle, and the third administration is on day 15 of the first 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle.
[0336] In some aspects, the first administration of the multispecific antibody or antigen binding fragment thereof is on day 1 of the first 28-day treatment cycle, the second administration is on day 4 of the first 28-day treatment cycle, the third administration is on day 8 of the first 28-day treatment cycle, and the fourth administration is on day 15 of the first 28-day treatment cycle.
[0337] In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.0036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle. In some aspects, about 0.001 mg / kg, about 0.0002 mg / kg, about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on days 1 and 4, about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 8, and about 1.5 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 15 of the 28-day treatment cycle.
[0338] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for more than one treatment cycle. In some aspects, the multispecific antibody or antigen binding fragment thereof is administered for at least 2 treatment cycles, at least 3 treatment cycles, at least 4 treatment cycles, at least 5 treatment cycles, at least 6 treatment cycles, at least 7 treatment cycles, at least 8 treatment cycles, at least 9 treatment cycles, or at least 10 treatment cycles.
[0339] In some aspects of the present disclosure, the tumor is a breast tumor, a lung tumor, a non-small cell lung tumor, an esophageal tumor, a thyroid tumor, a head and neck tumor, a bile duct tumor, a biliary tract tumor, a kidney tumor, a gastric tumor, a gastroesophageal junction tumor, a prostate tumor, a cervical tumor, an endometrial tumor, a bladder tumor, a uterine tumor, a stomach tumor, a rectal tumor, a colon tumor, a liver tumor, a urothelial tumor, a renal tumor, a hepatocellular tumor, or a pancreatic tumor.
[0340] In some aspects, the tumor is a lung tumor. In some aspects, the tumor is a breast tumor. In some aspects, the tumor is a gastric tumor. In some aspects, the tumor is a prostate tumor.
[0341] In some aspects, the disclosure is directed to a method of inhibiting tumor growth in a human subject by administering a multispecific antibody or antigen binding fragment thereof, wherein the multispecific antibody or antigen binding fragment thereof comprises: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and (d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; and a VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.
[0342] In some aspects, the disclosure is directed to a method of inhibiting tumor growth in a human subject by administering a multispecific antibody or antigen binding fragment thereof, wherein the multispecific antibody or antigen binding fragment thereof comprises: (a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and a VH1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26; (b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28; (c) a VL3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and (d) a VL4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.
[0343] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide comprises an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 33, and the second polypeptide comprises an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 34.
[0344] In some aspects, the multispecific antibody or antigen binding fragment thereof comprises a first polypeptide and a second polypeptide, wherein the first polypeptide is encoded by a polynucleotide at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 35, and the second polypeptide is encoded by a polynucleotide at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to SEQ ID NO: 36.
[0345] In some aspects, the multispecific antibody or antigen binding fragment thereof is a full-length antibody that has a knob-into-hole (KIH) structure in a Fc region, wherein the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45, and the hole side of Fc region comprises the amino acid sequence of SEQ ID NO: 46.
[0346] In some aspects, administration of the multispecific antibody or antigen binding fragment results in a decrease in tumor size.
[0347] In some aspects of the methods disclosed herein, the cytotoxicity of the multispecific antibody or antigen binding fragment thereof described herein to human tumors can be measured by the half maximal effective concentration (EC50) . In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against lung tumors. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against breast tumors. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against gastric tumors. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof is cytotoxic against prostate tumors.
[0348] In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce in vitro cytokine release in the presence of target tumor cells.
[0349] In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce interleukin (IL) -6 release in vitro in the presence of target tumor cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce interferon gamma (IFN-γ) release in vitro in the presence of target tumor cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce tumor necrosis factor alpha (TNF-α) release in vitro in the presence of target tumor cells. In some aspects of the methods disclosed herein, administration of the multispecific antibody or antigen binding fragment thereof can induce IL-2 release in vitro in the presence of target tumor cells.
[0350] In some aspects, the disclosure is directed to a method for treating a tumor in a human subject, the method comprising administering to the subject a starting dose of a multispecific antibody or antigen binding fragment thereof, wherein the starting dose is based on the 20%effective concentration (EC20) of IFNγ release in vitro, following administration of the multispecific antibody or antigen binding fragment thereof.
[0351] In some aspects, the starting dose is about 0.7 micrograms per kilogram (μg / kg) to about 5 μg / kg per body weight (e.g., about 0.1 μg / kg, about 0.2 μg / kg, about 0.3 μg / kg, about 0.4 μg / kg, about 0.5 μg / kg, about 0.6 μg / kg, about 0.7 μg / kg, about 0.8 μg / kg, about 0.9 μg / kg, about 1.0 μg / kg, about 1.1 μg / kg, about 1.2 μg / kg, about 1.3 μg / kg, about 1.4 μg / kg, about 1.5 μg / kg, about 1.6 μg / kg, about 1.7 μg / kg, about 1.8 μg / kg, about 1.9 μg / kg, about 2.0 μg / kg, about 2.1 μg / kg, about 2.2 μg / kg, about 2.3 μg / kg, about 2.4 μg / kg, about 2.5 μg / kg, about 2.6 μg / kg, about 2.7 μg / kg, about 2.8 μg / kg, about 2.9 μg / kg, about 3.0 μg / kg, about 3.1 μg / kg, about 3.2 μg / kg, about 3.3 μg / kg, about 3.4 μg / kg, about 3.5 μg / kg, about 3.6 μg / kg, about 3.7 μg / kg, about 3.8 μg / kg, about 3.9 μg / kg, about 4.0 μg / kg, about 4.1 μg / kg, about 4.2 μg / kg, about 4.3 μg / kg, about 4.4 μg / kg, about 4.5 μg / kg, about 4.6 μg / kg, about 4.7 μg / kg, about 4.8 μg / kg, about 4.9 μg / kg, or about 5.0 μg / kg) . In some aspects, the starting dose is about 0.4 μg / kg.
[0352] In some aspects, the disclosure is directed to a method for treating a tumor in a human subject, the method comprising administering to the subject a therapeutically effective dose of a multispecific antibody or antigen binding fragment thereof, wherein the therapeutically effective dose is based on the 90%effective concentration (EC90) of cell lysis activity in vitro, following administration of the multispecific antibody or antigen binding fragment thereof.
[0353] In some aspects, the therapeutically effective dose is about 1,200 μg / kg to about 1,600 μg / kg (e.g., about 1,210 μg / kg, about 1,220 μg / kg, about 1,230 μg / kg, about 1,240 μg / kg, about 1,250 μg / kg, about 1,260 μg / kg, about 1,270 μg / kg, about 1,280 μg / kg, about 1,290 μg / kg, about 1,300 μg / kg, about 1,310 μg / kg, about 1,320 μg / kg, about 1,330 μg / kg, about 1,340 μg / kg, about 1,350 μg / kg, about 1,360 μg / kg, about 1,370 μg / kg, about 1,380 μg / kg, about 1,390 μg / kg, about 1,400 μg / kg, about 1,410 μg / kg, about 1,420 μg / kg, about 1,430 μg / kg, about 1,440 μg / kg, about 1,450 μg / kg, about 1,460 μg / kg, about 1,470 μg / kg, about 1,480 μg / kg, about 1,490 μg / kg, about 1,500 μg / kg, about 1,510 μg / kg, about 1,520 μg / kg, about 1,530 μg / kg, about 1,540 μg / kg, about 1,550 μg / kg, about 1,560 μg / kg, about 1,570 μg / kg, about 1,580 μg / kg, about 1,590 μg / kg, or about 1,600 μg / kg, or any value therebetween) .
[0354] In some aspects, the therapeutically effective dose is about 1,200 μg / kg, about 1,201 μg / kg, about 1,202 μg / kg, about 1,203 μg / kg, about 1,204 μg / kg, about 1,205 μg / kg, about 1,206 μg / kg, about 1,207 μg / kg, about 1,208 μg / kg, about 1,209 μg / kg, or about 1,210 μg / kg. In some aspects, the therapeutically effective dose is about 1,205 μg / kg. In some aspects, the therapeutically effective dose is about 1,580 μg / kg, about 1,581 μg / kg, about 1,582 μg / kg, about 1, 583 μg / kg, about 1,584 μg / kg, about 1,585 μg / kg, about 1,586 μg / kg, about 1,587 μg / kg, about 1,588 μg / kg, about 1,589 μg / kg, or about 1,590 μg / kg. In some aspects, the therapeutically effective dose is about 1,588 μg / kg.
[0355] In some aspects, the multispecific antibody or antigen binding fragment thereof is administered to the human subject as an intravenous infusion every two weeks in a 28-day treatment cycle.
[0356] In some aspects, the multispecific antibody or antigen binding fragment is a full-length antibody that has a knob-into-hole (KIH) structure in a Fc region, wherein the knob side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 45, and the hole side of the Fc region comprises the amino acid sequence of SEQ ID NO: 46. Combination Therapy
[0357] In some aspects, the multispecific antibody or antigen binding fragment described herein can be used in combination with surgery, radiation therapy, chemotherapy, immunotherapy, radioimmunotherapy, photoimmunotherapy, immunomodulators, vaccines, virus-like particles, interference RNA therapy, treatment with a therapeutic agent, and / or gene therapy.
[0358] In some aspects, the multispecific antibody or antigen binding fragment can be an immunoconjugate. An immunoconjugate is an antibody, antigen-binding antibody fragment, antibody complex or antibody fusion protein that is conjugated to a therapeutic agent. Conjugation can be covalent or non-covalent. Where the therapeutic agent is a drug, the resulting immunoconjugate is an antibody-drug conjugate or ADC.
[0359] In some aspects, the therapeutic agent can be a drug, toxin, immunomodulator, second antibody, antigen-binding fragment of a second antibody, pro-apoptotic agent, toxin, RNase, hormone, radionuclide, anti-angiogenic agent, siRNA, RNAi, chemotherapeutic agent, cytokine, chemokine, prodrug or enzyme.
[0360] Suitable drugs include but are not limited to chemotherapeutic agents such as 5-fluorouracil, afatinib, aplidin, azaribine, anastrozole, anthracyclines, axitinib, AVL-101, AVL-291, bendamustine, bleomycin, bortezomib, bosutinib, bryostatin-1, busulfan, calicheamycin, camptothecin, carboplatin, 10-hydroxycamptothecin, carmustine, celebrex, chlorambucil, cisplatinum, Cox-2 inhibitors, irinotecan (CPT-11) , SN-38, carboplatin, cladribine, camptothecans, crizotinib, cyclophosphamide, cytarabine, dacarbazine, dasatinib, dinaciclib, docetaxel, dactinomycin, daunorubicin, doxorubicin, DNA topoisomerase I inhibitor (DXd) , 2-pyrrolinodoxorubicine (2P-DOX) , cyano-morpholino doxorubicin, doxorubicin glucuronide, epirubicin glucuronide, erlotinib, estramustine, epidophyllotoxin, erlotinib, entinostat, estrogen receptor binding agents, etoposide (VP16) , etoposide glucuronide, etoposide phosphate, exemestane, fingolimod, floxuridine (FUdR) , 3′, 5′-O-dioleoyl-FudR (FUdR-dO) , fludarabine, flutamide, farnesyl-protein transferase inhibitors, flavopiridol, fostamatinib, ganetespib, GDC-0834, GS-1101, gefitinib, gemcitabine, hydroxyurea, ibrutinib, idarubicin, idelalisib, ifosfamide, imatinib, L-asparaginase, lapatinib, lenolidamide, leucovorin, LFM-A13, lomustine, mechlorethamine, melphalan, mercaptopurine, 6-mercaptopurine, methotrexate, microtubule inhibitor PF-06380101, mitoxantrone, mithramycin, mitomycin, mitotane, navelbine, neratinib, nilotinib, nitrosurea, olaparib, rucaparib, talazoparib, plicomycin, procarbazine, paclitaxel, PCI-32765, pentostatin, PSI-341, raloxifene, Ranpirnase (Rap) , semustine, sorafenib, streptozocin, SU11248, sunitinib, tamoxifen, temazolomide (an aqueous form of DTIC) , transplatinum, thalidomide, thioguanine, thiotepa, teniposide, topotecan, uracil mustard, vatalanib, vinorelbine, vinblastine, vincristine, vinca alkaloids and ZD1839. Suitable chemotherapeutic agents are described in Remington's Pharmaceutical Sciences, 19th Ed. (Mack Publishing Co. 1995) , and in Goodman and Gilman's The Pharmacological Basis of Therapeutics, 7th Ed. (MacMillan Publishing Co. 1985) , as well as revised editions of these publications. Other suitable chemotherapeutic agents, such as experimental drugs, are known to those of skill in the art.
[0361] Suitable immunomodulators include but are not limited to cytokines, lymphokines, monokines, stem cell growth factors, lymphotoxins, hematopoietic factors, colony stimulating factors (CSF) , interferons (IFN) , parathyroid hormone, thyroxine, insulin, proinsulin, relaxin, prorelaxin, follicle stimulating hormone (FSH) , thyroid stimulating hormone (TSH) , luteinizing hormone (LH) , hepatic growth factor, prostaglandin, fibroblast growth factor, prolactin, placental lactogen, OB protein, transforming growth factor (TGF) , TGF-α, TGF-β, insulin-like growth factor (IGF) , erythropoietin, thrombopoietin, tumor necrosis factor (TNF) , TNF-α, TNF-β, mullerian-inhibiting substance, mouse gonadotropin-associated peptide, inhibin, activin, vascular endothelial growth factor, integrin, interleukin (IL) , granulocyte-colony stimulating factor (G-CSF) , granulocyte macrophage-colony stimulating factor (GM-CSF) , interferon-α, interferon-β, interferon-γ, S1 factor, IL-1, IL-1 cc, IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-11, IL-12, IL-13, IL-14, IL-15, IL-16, IL-17, IL-18 IL-21, IL-23, IL-25, LIF, kit-ligand, FLT-3, angiostatin, thrombospondin and endostatin.
[0362] Suitable radionuclides include but are not limited to 11C, 13N, 15O, 32P, 33P, 47Sc, 51Cr, 57Co, 58Co, 59Fe, 62Cu, 67Cu, 67Ga, 67Ga, 75Br, 75Se, 75Se, 76Br, 77As, 77Br, 80mBr, 89Sr, 90Y, 95Ru, 97Ru, 99Mo, 99mTc, 103mRh, 103Ru, 105Rh, 105Ru, 107Hg, 109Pd, 109Pt, 111Ag, 111In, 113mIn, 119Sb, 121mTe, 122mTe, 125I, 125mTe, 126I, 131I, 133I, 142Pr, 143Pr, 149Pm, 152Dy, 153Sm, 161Ho, 161Tb, 165Tm, 166Dy, 166Ho, 167Tm, 168Tm, 169Er, 169Yb, 177Lu, 186Re, 188Re, 189mOs, 189Re, 192Ir, 194Ir, 197Pt, 198Au, 199Au, 199Au, 201Tl, 203Hg, 211At, 211Bi, 211Pb, 212Bi, 212Pb, 213Bi, 215Po, 217At, 219Rn, 221Fr, 223Ra, 225Ac, 227Th and 255Fm.
[0363] A toxin, such as Pseudomonas exotoxin, may also be complexed to or form a portion of an immunoconjugate disclosed herein. Suitable toxins include but are not limited to ricin, abrin, ribonuclease (RNase) , DNase I, Staphylococcal enterotoxin-A, pokeweed antiviral protein, gelonin, diphtheria toxin, Pseudomonas exotoxin, and Pseudomonas endotoxin. Additional toxins suitable for use in the present disclosure are known to those of skill in the art and are disclosed in U.S. Pat. No. 6,077,499, which is incorporated in its entirety by reference.
[0364] Anti-Trop2 antigen-conjugated nanoparticles (ST-NPs)
[0365] Trop2-targeted therapy also includes nanoparticles bound to anti-TROP2 multispecific antibodies. Contemplated herein are anti-TROP2 antigen-conjugated nanoparticles as potential nanocarriers consisting of carboxymethyl glucan (CMD) derivatives and bioreducible disulfide bonds loaded with a chemotherapeutic agent such as, e.g., doxorubicin, which can be utilized for the targeted delivery of anticancer drugs. After binding to TROP2, the nanoparticles enter cells via endocytosis and release their chemotherapeutic payload. The multispecific antibodies can be delivered in the form of DNA or mRNA nucleotides which encode the multispecific antibodies.
[0366] Clauses relating to aspects of the disclosure: 1. A multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 comprising: (a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 3; and a variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 6; (b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 9; and a VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 12; (c) a VL3 that specifica...
Claims
1.A multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 comprising:(a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 3; anda variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 6;(b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 9; anda VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 12;(c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 15; anda VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 18; and(d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 21; anda VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 24.2.The multispecific antibody or antigen binding fragment thereof of claim 1, wherein:(a) the VL1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; andthe VH1 that specifically binds to cMet comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6;(b) the VL2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; andthe VH2 that specifically binds to Trop2 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12;(c) the VL3 that specifically binds to CD28 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; andthe VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and(d) the VL4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; andthe VH4 that specifically binds to CD3 comprises a CDR1 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.3.A multispecific antibody or antigen binding fragment there that specifically binds to cMet, Trop2, CD28, and CD3 comprising:(a) a variable light chain region (VL1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 25; and a variable heavy chain region (VH1) that specifically binds to cMet comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 26;(b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 28;(c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 30; and(d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%identical to the amino acid sequence of SEQ ID NO: 32.4.The multispecific antibody or antigen binding fragment thereof of claim 3, wherein:(a) the VL1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and the VH1 that specifically binds to cMet comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26;(b) the VL2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and the VH2 that specifically binds to Trop2 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28;(c) the VL3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and the VH3 that specifically binds to CD28 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and(d) the VL4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and the VH4 that specifically binds to CD3 comprises an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.5.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-4, which is a full-length antibody.6.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-5, comprising an immunoglobulin G1 (IgG1) Fc.7.The multispecific antibody or antigen binding fragment thereof any one of claims 1-6, which has a knob-into-hole (KIH) structure in a Fc region.8.The multispecific antibody or antigen binding fragment thereof of claim 7, wherein the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45.9.The multispecific antibody or antigen binding fragment thereof of claim 7 or 8, wherein the hole side of the Fc region comprises the amino acid sequence of SEQ ID NO: 46.10.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-4, which comprises an antigen binding fragment.11.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-10, having reduced Fc effector function.12.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-11, which binds to cMet with a Kd of about 1.0 nM to about 10 nM.13.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-12, which binds to Trop2 with a Kd of about 30 nM to about 50 nM.14.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-13, which binds to CD28 with a Kd of about 10 nM to about 20 nM.15.The multispecific antibody or antigen binding fragment thereof of any one of claims 1-14, which binds to CD3 with a Kd of about 10 nM to about 30 nM.16.A nucleic acid encoding the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15.17.A nucleic acid expression vector comprising the nucleic acid of claim 16.18.A host cell comprising the nucleic acid expression vector of claim 17.19.A pharmaceutical composition comprising the multispecific antibody or antigen binding fragment of any one of claims 1-15, the nucleic acid of claim 16, the nucleic acid expression vector of claim 17, and / or host cell of claim 18, and a pharmaceutically acceptable carrier.20.A pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15, and at least one pharmaceutically acceptable carrier.21.A pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15, further comprising a buffer.22.The pharmaceutical composition of claim 21, further comprising:e) histidine;f) sucrose;g) methionine, andh) polysorbate 80.23.A pharmaceutical kit comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15, and instructions for use thereof.24.A pharmaceutical kit comprising the pharmaceutical composition of any one of claims 19-22, and instructions for use thereof.25.A method of making the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15, comprising (a) culturing a cell expressing the multispecific antibody or antigen binding fragment thereof; and (b) isolating the antibody or fragment from the cultured cell.26.The method of claim 25, wherein the cell is a eukaryotic cell.27.The method of claim 25 or 26, wherein the cell is a Chinese hamster ovary (CHO) cell.28.A method for treating a cancer in a human subject, the method comprising administering to the subject a multispecific antibody or antigen binding fragment thereof, wherein the multispecific antibody or antigen binding fragment thereof is administered at a dose of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.29.The method of claim 28, wherein the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of 0.0003 to about 0.0005 mg / kg of body weight of the subject.30.The method of claim 28 or 29, wherein the multispecific antibody or antigen binding fragment thereof is administered at a starting dose of about 0.0004 mg / kg of body weight of the subject.31.The method of any one of claims 28-30, wherein the starting dose of the multispecific antibody or antigen binding fragment thereof can be increased to a therapeutically effective dose of from about 0.0005 mg / kg to about 1.6 mg / kg of body weight of the subject.32.The method of any one of claims 28-31, wherein the multispecific antibody or antigen binding fragment thereof is administered at a dose of about 0.0004 mg / kg, about 0.0012 mg / kg, about 0.036 mg / kg, about 0.011 mg / kg, about 0.033 mg / kg, about 0.1 mg / kg, about 0.3 mg / kg, about 0.6 mg / kg, about 1.2 mg / kg, or about 1.6 mg / kg of body weight of the subject.33.The method of any one of claims 28-32, wherein the multispecific antibody or antigen binding fragment thereof is administered intravenously.34.The method of claim 33, wherein the multispecific antibody or antigen binding fragment thereof is administered as an intravenous infusion.35.The method of any one of claims 28-34, wherein the multispecific antibody or antigen binding fragment thereof is administered to the subject in a 28-day treatment cycle.36.The method of any one of claims 28-35, wherein the multispecific antibody or antigen binding fragment thereof is administered to the subject every 2 weeks in a 28-day treatment cycle.37.The method of claim 36, wherein the multispecific antibody or antigen binding fragment thereof is administered to the subject on day one and day 15 of the 28-day treatment cycle.38.The method of any one of claims 28-34, wherein the multispecific antibody or antigen binding fragment thereof is administered to the subject three times within a treatment cycle.39.The method of claim 38, wherein the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, day 8, and day 15 of a 28-day treatment cycle.40.The method of any one of claims 28-34, wherein the multispecific antibody or antigen binding fragment thereof is administered to the subject four times within a treatment cycle.41.The method of claim 40, wherein the multispecific antibody or antigen binding fragment thereof is administered to the subject on day 1, day 4, day 8, and day 15 of a 28-day treatment cycle.42.The method of any one of claims 36-41, wherein the multispecific antibody or antigen binding fragment thereof is administered for one treatment cycle.43.The method of any one of claims 36-41, wherein the multispecific antibody or antigen binding fragment thereof is administered for more than one treatment cycle.44.The method of any one of claims 36-43, wherein the multispecific antibody or antigen binding fragment thereof is administered for at least 2 treatment cycles, at least 3 treatment cycles, at least 4 treatment cycles, at least 5 treatment cycles, at least 6 treatment cycles, at least 7 treatment cycles, at least 8 treatment cycles, at least 9 treatment cycles, or at least 10 treatment cycles.45.The method of any one of claims 28-44, wherein the cancer is a solid cancer.46.The method of claim 45, wherein the cancer is breast cancer, lung cancer, non-small cell lung cancer, esophageal cancer, thyroid cancer, head and neck cancer, bile duct cancer, biliary tract cancer, kidney cancer, gastric cancer, gastroesophageal junction cancer, prostate cancer, cervical cancer, endometrial cancer, bladder cancer, uterine cancer, stomach cancer, rectal cancer, colon cancer, liver cancer, urothelial cancer, renal cancer, hepatocellular cancer, or pancreatic cancer.47.The method of claim 46, wherein the cancer is lung cancer.48.The method of claim 46, wherein the cancer is breast cancer.49.The method of claim 46, wherein the cancer is gastric cancer.50.The method of claim 46, wherein the cancer is prostate cancer.51.The method of any one of claims 28-44, wherein the cancer is a hematological cancer.52.The method of claim 51, wherein the hematological cancer is leukemia or lymphoma.53.The method of claim 52, wherein the leukemia or lymphoma is B cell leukemia, B cell lymphoma, diffuse large B-cell lymphoma (DLBCL) Follicular lymphoma, Chronic lymphocytic leukemia (CLL) / small lymphocytic lymphoma (SLL) , Mantle cell lymphoma (MCL) , Burkitt lymphoma, Lymphoplasmacytic lymphoma (Waldenstrom macroglobulinemia) , prolymphocytic leukemia (PLL) , or hairy cell leukemia (HCL) .54.The method of any one of claims 28-53, wherein the multispecific antibody or antigen binding fragment thereof comprises:(a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; anda variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6;(b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; anda VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12;(c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; anda VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and(d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; anda VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.55.The method of any one of claims 28-54, wherein the multispecific antibody or antigen binding fragment thereof comprises:(a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and VH1 that specifically binds to cMet comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26;(b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28;(c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and(d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.56.The method of any one of claims 28-55, wherein the multispecific antibody or antigen binding fragment thereof is a full-length antibody comprising an immunoglobulin G1 (IgG1) Fc.57.The method of any one of claims 28-56, wherein the multispecific antibody or antigen binding fragment thereof has a knob-into-hole (KIH) structure in a Fc region.58.The method of claim 57, wherein the knob side of the Fc region comprises the amino acid sequence of SEQ ID NO: 45 and wherein the hole side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 46.59.The method of any one of claims 28-58, wherein the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.60.The method of any one of claims 28-59, wherein the administration results in a decrease in the number of cancer cells in the subject.61.The method of any one of claims 28-60, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against lung cancer cells.62.The method of any one of claims 28-61, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against breast cancer cells.63.The method of any one of claims 28-62, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against gastric cancer cells.64.The method of any one of claims 28-63, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against prostate cancer cells.65.The method of any one of claims 28-64, wherein administration of the multispecific antibody or antigen binding fragment thereof induces in vitro cytokine release in the presence of target cancer cells.66.The method of claim 65, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of interleukin (IL) -6 in vitro in the presence of target cancer cells.67.The method of claim 65, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of interferon gamma (IFN-γ) in vitro in the presence of target cancer cells.68.The method of claim 65, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of tumor necrosis factor alpha (TNF-α) in vitro in the presence of target cancer cells.69.The method of claim 65, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of IL-2 in vitro in the presence of target cancer cells.70.A method of inhibiting tumor growth in a human subject, the method comprising administering a therapeutically effective amount of a multispecific antibody or antigen binding fragment thereof to the subject, wherein the multispecific antibody or antigen binding fragment thereof is administered as an intravenous infusion every two weeks, in a 28-day treatment cycle, at a dose of about of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.71.The method of claim 70, wherein about 0.0004 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.72.The method of claim 70, wherein about 0.0012 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.73.The method of claim 70, wherein about 0.036 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.74.The method of claim 70, wherein about 0.011 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.75.The method of claim 70, wherein about 0.033 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.76.The method of claim 70, wherein about 0.1 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.77.The method of claim 70, wherein about 0.3 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.78.The method of claim 70, wherein about 0.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.79.The method of claim 70, wherein about 1.2 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.80.The method of claim 70, wherein about 1.6 mg / kg of the multispecific antibody or antigen binding fragment thereof is administered to the subject.81.The method of any one of claims 70-80, wherein the first administration is on day 1 of the first 28-day treatment cycle and the second administration is on day 15 of the first 28-day treatment cycle.82.The method of any one of claims 70-80, wherein the first administration is on day 1 of the first 28-day treatment cycle, the second administration is on day 8 of the first 28-day treatment cycle, and the third administration is on day 15 of the first 28-day treatment cycle.83.The method of any one of claims 70-80, wherein the first administration is on day 1 of the first 28-day treatment cycle, the second administration is on day 4 of the first 28-day treatment cycle, the third administration is on day 8 of the first 28-day treatment cycle, and the fourth administration is on day 15 of the first 28-day treatment cycle.84.The method of any one of claims 70-82, wherein the multispecific antibody or antigen binding fragment thereof is administered for more than one treatment cycle.85.The method of any one of claims 70-84, wherein the multispecific antibody or antigen binding fragment thereof is administered for at least 2 treatment cycles, at least 3 treatment cycles, at least 4 treatment cycles, at least 5 treatment cycles, at least 6 treatment cycles, at least 7 treatment cycles, at least 8 treatment cycles, at least 9 treatment cycles, or at least 10 treatment cycles.86.The method of any one of claims 70-85, wherein the tumor is a breast tumor, a lung tumor, a non-small cell lung tumor, an esophageal tumor, a thyroid tumor, a head and neck tumor, a bile duct tumor, a biliary tract tumor, a kidney tumor, a gastric tumor, a gastroesophageal junction tumor, a prostate tumor, a cervical tumor, an endometrial tumor, a bladder tumor, a uterine tumor, a stomach tumor, a rectal tumor, a colon tumor, a liver tumor, a urothelial tumor, a renal tumor, a hepatocellular tumor, or a pancreatic tumor.87.The method of claim 86, wherein the tumor is a lung tumor.88.The method of claim 86, wherein the tumor is a breast tumor.89.The method of claim 86, wherein the tumor is a gastric tumor.90.The method of claim 86, wherein the tumor is a prostate tumor.91.The method of any one of claims 70-90, wherein the multispecific antibody or antigen binding fragment thereof comprises:(a) a variable light chain region (VL1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 1; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 2; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 3; anda variable heavy chain region (VH1) that specifically binds to cMet comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 4; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 5; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 6;(b) a VL2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 7; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 8; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 9; anda VH2 that specifically binds to Trop2 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 10; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 11; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 12;(c) a VL3 that specifically binds to CD28 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 13; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 14; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 15; anda VH3 that specifically binds to CD28 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 16; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 17; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 18; and(d) a VL4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 19; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 20; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 21; anda VH4 that specifically binds to CD3 comprising a CDR1 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 22; a CDR2 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 23; and a CDR3 comprising an amino acid sequence at least 90%, 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 24.92.The method of any one of claims 70-91, wherein the multispecific antibody or antigen binding fragment thereof comprises:(a) a VL1 that specifically binds to cMet comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 25; and a VH1 that specifically binds to cMet comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 26;(b) a VL2 that specifically binds to Trop2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 27; and a VH2 that specifically binds to Trop2 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 28;(c) a VL3 that specifically binds to CD28 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 29; and a VH3 that specifically binds to CD28 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 30; and(d) a VL4 that specifically binds to CD3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 31; and a VH4 that specifically binds to CD3 comprising an amino acid sequence at least 95%, 96%, 97%, 98%, 99%, or 100%identical to the amino acid sequence of SEQ ID NO: 32.93.The method of any one of claims 69-91, wherein the multispecific antibody or antigen binding fragment is a full-length antibody that has a knob-into-hole (KIH) structure in a Fc region, wherein the knob side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 45, and the hole side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 46.94.The method of any one of claims 70-93 wherein the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.95.The method of any one of claims 70-94, wherein the administration results in a decrease in tumor size.96.The method of any one of claims 70-95, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against lung tumors.97.The method of any one of claims 70-96, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against breast tumors.98.The method of any one of claims 70-97, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against gastric tumors.99.The method of any one of claims 70-98, wherein the multispecific antibody or antigen binding fragment thereof is cytotoxic against prostate tumors.100.The method of any one of claims 70-99, wherein administration of the multispecific antibody or antigen binding fragment thereof induces in vitro cytokine release in the presence of target tumor cells.101.The method of claim 100, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of interleukin (IL) -6 in vitro in the presence of target tumor cells.102.The method of claim 100, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of interferon gamma (IFN-γ) in vitro in the presence of target tumor cells.103.The method of claim 100, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of tumor necrosis factor alpha (TNF-α) in vitro in the presence of target tumor cells.104.The method of claim 100, wherein administration of the multispecific antibody or antigen binding fragment thereof induces release of IL-2 in vitro in the presence of target tumor cells.105.A method for treating a tumor in a human subject, the method comprising administering to the subject a starting dose of a multispecific antibody or antigen binding fragment thereof, wherein the starting dose is based on the 20%effective concentration (EC20) of IFNγrelease in vitro, following administration of the multispecific antibody or antigen binding fragment thereof.106.The method of claim 106, wherein the starting dose is about 0.1 μg / kg, about 0.2 μg / kg, about 0.3 μg / kg, about 0.4 μg / kg, about 0.5 μg / kg, about 0.6 μg / kg, about 0.7 μg / kg, about 0.8 μg / kg, about 0.9 μg / kg, about 1.0 μg / kg, about 1.1 μg / kg, about 1.2 μg / kg, about 1.3 μg / kg, about 1.4 μg / kg, about 1.5 μg / kg, about 1.6 μg / kg, about 1.7 μg / kg, about 1.8 μg / kg, about 1.9 μg / kg, about 2.0 μg / kg, about 2.1 μg / kg, about 2.2 μg / kg, about 2.3 μg / kg, about 2.4 μg / kg, about 2.5 μg / kg, about 2.6 μg / kg, about 2.7 μg / kg, about 2.8 μg / kg, about 2.9 μg / kg, about 3.0 μg / kg, about 3.1 μg / kg, about 3.2 μg / kg, about 3.3 μg / kg, about 3.4 μg / kg, about 3.5 μg / kg, about 3.6 μg / kg, about 3.7 μg / kg, about 3.8 μg / kg, about 3.9 μg / kg, about 4.0 μg / kg, about 4.1 μg / kg, about 4.2 μg / kg, about 4.3 μg / kg, about 4.4 μg / kg, about 4.5 μg / kg, about 4.6 μg / kg, about 4.7 μg / kg, about 4.8 μg / kg, about 4.9 μg / kg, or about 5.0 μg / kg..107.The method of claim 105 or 106, wherein the starting dose is about 0.4 μg / kg.108.A method for treating a tumor in a human subject, the method comprising administering to the subject a therapeutically effective dose of a multispecific antibody or antigen binding fragment thereof, wherein the therapeutically effective dose is based on the 90%effective concentration (EC90) of cell lysis activity in vitro, following administration of the multispecific antibody or antigen binding fragment thereof.109.The method of claim 108, wherein the therapeutically effective dose is about 1, 200 μg / kg, about 1, 205 μg / kg about 1, 210 μg / kg, about 1, 220 μg / kg, about 1, 230 μg / kg, about 1, 240 μg / kg, about 1, 250 μg / kg, about 1, 260 μg / kg, about 1, 270 μg / kg, about 1, 280 μg / kg, about 1, 290 μg / kg, about 1, 300 μg / kg, about 1, 310 μg / kg, about 1, 320 μg / kg, about 1, 330 μg / kg, about 1, 340 μg / kg, about 1, 350 μg / kg, about 1, 360 μg / kg, about 1, 370 μg / kg, about 1, 380 μg / kg, about 1, 390 μg / kg, about 1, 400 μg / kg, about 1, 410 μg / kg, about 1, 420 μg / kg, about 1, 430 μg / kg, about 1, 440 μg / kg, about 1, 450 μg / kg, about 1, 460 μg / kg, about 1, 470 μg / kg, about 1, 480 μg / kg, about 1, 490 μg / kg, about 1, 500 μg / kg, about 1, 510 μg / kg, about 1, 520 μg / kg, about 1, 530 μg / kg, about 1, 540 μg / kg, about 1, 550 μg / kg, about 1, 560 μg / kg, about 1, 570 μg / kg, about 1, 580 μg / kg, about 1, 590 μg / kg, or about 1, 600 μg / kg.110.The method of claim 108 or 109, wherein the therapeutically effective dose is about 1,205 μg / kg.111.The method of any one of claims 108-110, wherein the therapeutically effective dose is about 1, 588 μg / kg.112.The method of any one of claims 104-110, wherein the multispecific antibody or antigen binding fragment thereof is administered to the human subject as an intravenous infusion every two weeks in a 28-day treatment cycle.113.The method of any one of claims 105-112, wherein the multispecific antibody or antigen binding fragment is a full-length antibody that has a knob-into-hole (KIH) structure in a Fc region, wherein the knob side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 45, and the hole side of the Fc region comprises a polypeptide chain comprising the amino acid sequence of SEQ ID NO: 46.114.The method of any one of claims 105-113, wherein the multispecific antibody or antigen binding fragment thereof has a reduced Fc effector function.115.A multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3 wherein the variable light chain region (VL1) that specifically binds to cMet comprises the CDR1 of SEQ ID NO: 50, the CDR2 of SEQ ID NO: 51 and the CDR3 of SEQ ID NO: 52, andthe variable heavy chain region (VH1) that specifically binds to cMet comprises the CDR1 of SEQ ID NO: 47, the CDR2 of SEQ ID NO: 48, and the CDR3 of SEQ ID NO: 49.116.A multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3, wherein the variable light chain region VL2 that specifically binds to Trop2 comprises the CDR1 of SEQ ID NO: 53, the CDR2 of SEQ ID NO: 54, and the CDR3 of SEQ ID NO: 55; andthe VH2 that specifically binds to Trop2 comprises the CDR1 of SEQ ID NO: 56, the CDR2 of SEQ ID NO: 57, and the CDR3 of SEQ ID NO: 58.117.A multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3, wherein the variable light chain region VL3 that specifically binds to CD28 comprises the CDR1 of SEQ ID NO: 59, the CDR2 of SEQ ID NO: 60, and the CDR3 of SEQ ID NO: 61.118.A multispecific antibody or antigen binding fragment thereof that specifically binds to cMet, Trop2, CD28, and CD3, wherein the variable light chain region VL2 that specifically binds to CD3 comprises the CDR1 of SEQ ID NO: 62, the CDR2 of SEQ ID NO: 63, and the CDR3 of SEQ ID NO: 64; andthe VH2 that specifically binds to Trop2 comprises the CDR1 of SEQ ID NO: 65, the CDR2 of SEQ ID NO: 66, and the CDR3 of SEQ ID NO: 67.119.A pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 115-118, and at least one pharmaceutically acceptable carrier.120.A method for treating a cancer in a human subject, the method comprising administering to the subject the multispecific antibody or antigen binding fragment thereof of any one of claims 115-118 or the pharmaceutical composition of claim 119, wherein the multispecific antibody or antigen binding fragment thereof or the pharmaceutical composition is administered at a dose of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.121.A method of inhibiting tumor growth in a human subject, the method comprising administering a therapeutically effective amount of a multispecific antibody or antigen binding fragment thereof of any one of claims 115-118 or the pharmaceutical composition of claim 119, to the subject, wherein the multispecific antibody or antigen binding fragment thereof or the pharmaceutical composition is administered as an intravenous infusion every two weeks, in a 28-day treatment cycle, at a dose of about of about 0.0001 to about 1.7 milligrams per kilogram (mg / kg) of body weight of the subject.122.A method of making a pharmaceutical composition comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15, the method comprising adding to a formulation comprising the multispecific antibody or antigen binding fragment thereof and a formulation buffer, a stock solution of 5% (w / w) polysorbate 80 (PS80) to adjust the PS80 concentration of 0.02% (w / v) and adding a stock solution of 200 mM (2.872%w / w) L-methionine to adjust the concentration of L-methionine to 10 mM.123.The method of claim 122, wherein the formulation buffer comprises 20 mM histidine buffer, 8% (w / v) Sucrose, 0.02% (w / v) PS80, 10 mM L-Methionine and has a pH of 5.2.124.A pharmaceutical composition comprising:a) the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15 in a concentration of from about 0.1 mg / mL to about 50 mg / mL;b) histidine buffer or acetate buffer in a concentration of from about 5 mM to about 25 mM;c) sucrose in a concentration of from about 10% (w / v) to about 50% (w / v) ;d) surfactant in a concentration of from about 1% (w / v) to about 10% (w / v) ; ande) L-Methionine in a concentration of from about 1 mM to about 100 mM;wherein the pH is in a range of from about 5 to about 6.125.A pharmaceutical composition comprising:a) the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15 in a concentration of from about 0.5 mg / mL to about 1.5 mg / mL;b) histidine buffer or acetate buffer in a concentration of from about 15 mM to about 25 mM;c) sucrose in a concentration of from about . 01% (w / v) to about 10% (w / v) ;d) surfactant in a concentration of from about 1% (w / v) to about 10% (w / v) ; ande) L-Methionine in a concentration of from about 5 mM to about 15 mM;wherein the pH is in a range of from about 5.1 to about 5.5.126.The pharmaceutical composition of claim 125, comprising:a) the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15 in a concentration of about 1 mg / mL;b) histidine buffer in a concentration of about 20 mM;c) sucrose in a concentration of about 8% (w / v) ;d) PS80 in a concentration of about . 02% (w / v) ; ande) L-Methionine in a concentration of about 10 mM;wherein the pH is about 5.2.127.The pharmaceutical composition of any one of claims 124-126, wherein the pharmaceutical composition is lyophilized.128.A lyophilized pharmaceutical composition comprising:a) the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15 in a concentration of about 1 mg / mL;b) histidine buffer in a concentration of about 20 mM;c) sucrose in a concentration of about 8% (w / v) ;d) PS80 in a concentration of about . 02% (w / v) , ande) L-Methionine in a concentration of about 10 mM;wherein the pH is about 5.2.129.The pharmaceutical composition of claim 127 or 128, wherein the pharmaceutical composition can be reconstituted with water for injection (WFI) .130.The pharmaceutical composition of claim 129, wherein the reconstituted product can be diluted in normal saline to target dose levels per a pharmacy manual or final clinical protocol.131.A liquid formulation comprising a multispecific antibody and a pharmaceutically acceptable excipient.132.A liquid formulation comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15 and a pharmaceutically acceptable excipient.133.A stabilized composition comprising a lyophllized formulation comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15 and at least one excipient selected from a buffer.134.A stabilized lyophilized formulation for reconstitution comprising the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15, a buffer and a surfactant.135.The composition or formulation of any one of claims 124-134, wherein the composition or formulation is administered parenterally.136.The composition or formulation of claim 135, wherein the parenteral administration is intramuscular, intravenous, subcutaneous, intradermal, or intraperitoneal.137.A process of preparing a salt of the multispecific antibody or antigen binding fragment thereof of any one of claims 1-15, comprising:(a) dissolving said multispecific antibody or antigen binding fragment thereof complex in a buffer solution to form a polypeptide complex solution, wherein the buffer solution has a pH value of about 4.7 to about 6.5;(b) adding a salt solution;(c) isolating the protein by precipitation; and(d) purifying the crude product on a SEC column, followed by concentration and lyophilization.
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