Disruption of MBD6 in t cells to enhance immunotherapy

Abstract

The application relates to modified immune effector cells with enhanced immune cell function, as well as related pharmaceutical compositions. The application further relates to methods for generating the modified immune effector cell and methods for using the modified immune effector cell for treatment of diseases (e g., adoptive cell therapy).

Description

Attorney Docket No: 243734.000222DISRUPTION OF MBD6 IN T CELLS TO ENHANCE IMMUNOTHERAPY CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to U.S. Provisional Application No. 63 / 685,623, filed August 21, 2024, the contents of which is incorporated by reference herein in its entirety.SEQUENCE LISTING

[0002] The instant application contains a Sequence Listing which has been submitted electronically in XML format and is hereby incorporated by reference in its entirety. Said XML copy, created on August 18. 2025. is named 243734_000222_SL.xml and is 222,222 bytes in size.FIELD

[0003] The application relates to modified immune effector cells with enhanced immune cell function, as well as related pharmaceutical compositions. The application further relates to methods for generating the modified immune effector cell and methods for using the modified immune effector cell for treatment of diseases (e.g., adoptive cell therapy).BACKGROUND

[0004] T cell-based immunotherapies, including both immune checkpoint blockade (ICB) and chimeric antigen receptor (CAR) T cells, have the potential to cure cancers that have been historically refractory to other treatment modalities. However, the window of therapeutic efficacy closes as T cells become terminally exhausted. Thus, the success of T cell-based immunotherapies relies on the ability of T cells to undergo robust proliferation and sustain effector function in the presence of tumor antigen. Similarly, with ICB. the endogenous population of T cells must retain a capacity to proliferate in response to the blocking antibody. Based on these commonalities, a recent consensus among the field has centered on a population of stem-like precursor exhausted (Tpex) CD8 T cells that can maintain their quantity through self-renewal and give rise to a transitory T cell population with effector properties (2, 5-10, 15- 17). The robust T cell expansion in both therapeutic settings has been associated with the effector population arising from a pool of stem-like CD8 T cells that have not yet undergone terminal differentiation or exhaustion. CD8 CD19-CAR T cells have been shown to undergo exhaustion in patients (11). Therefore, successful application of cellular therapy requires anAttorney Docket No: 243734.000222 understanding of cell-intrinsic mechanisms that restrict the developmental potential of CD8 T cells during their activation and sustained stimulation. Generally, there exists a need in the art for developing improved antigen-specific T cell therapy. This need can be met with a modified immune effector cell with enhanced effector cell function as disclosed herein.SUMMARY

[0005] As specified in the Background section above, there is a great need in the art for modified immune effector cells with enhanced immune cell function (e.g.. preserved developmental potential) for use in cell therapy for cancer and other disease (e.g., infectious or autoimmune diseases). The present application addresses these and other needs.

[0006] In one aspect, provided herein is a modified immune effector cell, wherein a Methyl- CpG Binding Domain Protein 6 (MBD6) gene or gene product is modified in the cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated.

[0007] In some embodiments, the level of functional MBD6 protein in the cell is reduced by 50% or more. In some embodiments, the MBD6 gene is deleted so that no detectable functional MBD6 protein is produced.

[0008] In some embodiments, the immune effector cell is a T cell. In some embodiments, the T cell is selected from a CD8+ T cell, a CD4+ T cell, a cytotoxic T cell, an a(3 T cell, a natural killer T (NKT) cell, a y8 T cell, a memory T cell, a T-helper cell, and a regulatory T cell (Treg).

[0009] In some embodiments, the immune effector cell is a stem cell that is capable of differentiating into an immune cell. In some embodiments, the stem cell is an induced pluripotent stem cell (iPSC).

[0010] In some embodiments, the immune effector cell is a natural killer (NK) cell.

[0011] In some embodiments, the cell further comprises at least one surface molecule capable of binding specifically to an antigen. In some embodiments, the antigen is selected from a tumor antigen, a viral antigen, a bacterial antigen, a fungal antigen, a parasite antigen, a prion antigen, and an antigen associated with an inflammation or an autoimmune disease.

[0012] In some embodiments, the tumor antigen is B-cell maturation antigen (BCMA) human epidermal growth factor receptor 2 (HER2), IL13Ra2, erythropoietin-producing human hepatocellular receptor A2 (EphA2), B7 homolog 3 protein (B7-H3), Cluster of Differentiation (CD) 19 (CD19), CD22, or CD123.

[0013] In some embodiments, the viral antigen is gp!20.Attorney Docket No: 243734.000222

[0014] In some embodiments, the cell further comprises a chimeric antigen receptor (CAR), an antigen specific T-cell receptor, or a bispecific antibody.

[0015] In some embodiments, the cell comprises a CAR. In some embodiments, the CAR comprises (i) an extracellular antigen-binding domain, (ii) a transmembrane domain, and (iii) a cytoplasmic domain. In some embodiments, the extracellular antigen-binding domain comprises an antibody or an antibody fragment. In some embodiments, the extracellular antigen-binding domain comprises an scFv capable of binding to BCMA, HER2, IL13Ra2. EphA2, B7-H3, CD19, CD22, CD123, or gpl20. In some embodiments, the extracellular antigen-binding domain further comprises a leader sequence. In some embodiments, the transmembrane domain is derived from CD3^, CD28, CD4, or CD8a. In some embodiments, the CAR further comprises a linker domain between the extracellular antigen-binding domain and the transmembrane domain. In some embodiments, the linker domain comprises a hinge region. In some embodiments, the CAR cytoplasmic domain comprises one or more lymphocyte activation domains. In some embodiments, the lymphocyte activation domain is derived from DAP10, DAP12. Fc epsilon receptor I y chain (FCER1G), CD35, CD3e. CD3y, CD3 CD27, CD28, CD40, CD134. CD137, CD226. CD79A. ICOS, or MyD88. In some embodiments, the CAR cytoplasmic domain comprises one or more co-stimulatory domains.

[0016] In some embodiments, immune effector cell has been activated and / or expanded ex vivo.

[0017] In some embodiments, the immune effector cell is an allogeneic cell. In some embodiments, the immune effector cell is an autologous cell.

[0018] In some embodiments, the immune effector cell is isolated from a subject having a disease. In some embodiments, the disease is a cancer, an infectious disease, an inflammatory disorder, or an autoimmune disease. In some embodiments, the cancer is a cancer expressing HER2, IL13Ra2, EphA2, B7-H3, CD19, CD22, or CD123. In some embodiments, the cancer is a HER2-positive breast cancer. In some embodiments, the cancer is BCMA positive multiple myeloma. In some embodiments, the cancer is CD19 and / or CD22 positive B-cell acute lymphoblastic leukemia. In some embodiments, the cancer is an IL13Ra2-positive glioblastoma.

[0019] In some embodiments, the infectious disease is cause by a virus. In one aspect, the virus is a virus expressing gpl20. In some embodiments, the infectious disease is caused by human immunodeficiency virus.

[0020] In some embodiments, the autoimmune disease is Lupus.

[0021] In some embodiments, the immune effector cell is derived from a blood, marrow,Attorney Docket No: 243734.000222 tissue, or a tumor sample.

[0022] In some embodiments, the immune effector cell is further modified to reduce or eliminate the expression and / or function of Methyl-CpG Binding Domain Protein 5 (MBD5), BRCAl-associated protein-1 (BAP1), and / or Additional Sex Combs Like Transcriptional Regulator 1 (ASXL1) gene(s) or gene product(s).

[0023] In some embodiments, the immune effector cell is further modified to reduce or eliminate the expression and / or function of Methyl-CpG Binding Domain Protein 5 (MBD5) gene or gene product.

[0024] In some embodiments, the level of functional MBD5, BAP1, and / or ASXL1 protein(s) in the cell is reduced by 50% or more. In some embodiments, the MBD5, BAP1, and / or ASXL1 gene(s) are deleted so that no detectable functional MBD5. BAP1. and / or ASXL1 protein(s) are produced.

[0025] In one aspect, provided herein is a pharmaceutical composition comprising the modified immune effector cell disclosed herein and a pharmaceutically acceptable carrier and / or excipient.

[0026] In one aspect, provided herein is a method for generating the modified immune effector cell disclosed herein, wherein the method comprises modifying an MBD6 gene or gene product in the cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated.

[0027] In one aspect, provided herein is a method of preserving developmental potential of an immune effector cell, wherein the method comprises modifying an MBD6 gene or gene product in the cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated.

[0028] In some embodiments, the method further comprises modifying a Methyl-CpG Binding Domain Protein 5 (MBD5), a BRCAl-associated protein-1 (BAP1), and / or an Additional Sex Combs Like Transcriptional Regulator 1 (ASXL1) gene(s) or gene product(s) in the cell so that the expression and / or function of MBD5, BAP1, and / or ASXL1 in the cell is reduced or eliminated.

[0029] In some embodiments, the method comprises an immune effector cell is a T cell. In some embodiments, the T cell is selected from a CD8+ T cell, a CD4+ T cell, a cytotoxic T cell, an aP T cell, a natural killer T (NKT) cell, a y5 T cell, a memory T cell, a T-helper cell, and a regulatory T cell (Treg).

[0030] In some embodiments, the method further comprises modifying the immune effector cell to express a chimeric antigen receptor (CAR) that is capable of binding to an antigen.Attorney Docket No: 243734.000222

[0031] In some embodiments of the method, the MBD6 gene in the immune effector cell is modified as a result of an activity of a site-specific nuclease. In some embodiments of the method, the site-specific nuclease is an RNA-guided endonuclease. In some embodiments of the method, the RNA-guided endonuclease is a Cas9 protein, Cpfl (Casl2a) protein, C2cl protein, C2c3 protein, or C2c2 protein. In some embodiments of the method, the RNA-guided endonuclease is a Cas9 protein. In some embodiments of the method, the Cas9 protein is programmed with a guide RNA (gRNA) that comprises a nucleotide sequence of ACACUCCAGACCGCACUUGCNGG (SEQ ID NO: 168),GUAGCUACGGGUUUGCUCCANGG (SEQ ID NO: 174),AGUUGUAGGAGGAACUCGAC (SEQ ID NO: 186). CCAAGCUGUGCAACCACCGG (SEQ ID NO: 187), or GUGCUUCAAAGCCCAUCCGA (SEQ ID NO: 188).

[0032] In some embodiments of the method, the site-specific nuclease is a zinc finger nuclease, a TALEN nuclease, or mega-TALEN nuclease.

[0033] In some embodiments of the method, the MBD6 gene product in the immune effector cell is modified as a result of an activity of an RNA interference (RNAi) molecule or an antisense oligonucleotide. In some embodiments of the method, the RNAi molecule is a small interfering RNA (siRNA) or a small hairpin RNA (shRNA). In some embodiments of the method, the site-specific nuclease or the RNAi molecule or the antisense oligonucleotide is introduced into the immune effector cell via a viral vector, a non-viral vector or a physical means.

[0034] In some embodiments of the method, the CAR is expressed from a transgene introduced into the immune effector cell.

[0035] In some embodiments of the method, the CAR-expressing transgene is introduced into the immune effector cell using a viral vector, a non-viral vector or a physical means. In some embodiments of the method, the viral vector is a retroviral vector, an adenoviral vector, an adeno-associated viral (AAV) vector, a herpes viral vector, or a baculoviral vector. In some embodiments of the method, the retroviral vector is a lentiviral vector. In some embodiments of the method, the non-viral vector is a transposon. In some embodiments of the method, the transposon is a sleeping beauty transposon or PiggyBac transposon.

[0036] In some embodiments of the method, the physical means is electroporation, microinjection, magnetofection, ultrasound, a ballistic or hydrodynamic method, or a combination thereof.

[0037] In some embodiments of the method, the modified immune effector cell is activated and / or expanded ex vivo.Attorney Docket No: 243734.000222

[0038] In one aspect, provided herein is a method of treating a disease in a subject in need thereof comprising administering to the subject an effective amount of the modified immune effector cell disclosed herein, or the pharmaceutical composition disclosed herein.

[0039] In some embodiments of the method, the modified immune effector cell is an autologous cell. In some embodiments of the method, the modified immune effector cell is an allogeneic cell.

[0040] In some embodiments of the method, the disease is a cancer, an infectious disease, an inflammatory disorder, or an autoimmune disease. In some embodiments of the method, the cancer is a solid tumor. In some embodiments of the method, the cancer is a hematologic cancer. In some embodiments of the method, the cancer is a cancer expressing BCMA, HER2, IL13Ra2, EphA2, B7-H3, CD19, CD22, or CD123.

[0041] In some embodiments of the method, the infectious disease is a virus expressing gpl20.

[0042] In some embodiments of the method, the autoimmune disease is Lupus.

[0043] In some embodiments of the method, the method comprises: 1) isolating an immune effector cell from the subject or a donor; 2) modifying an MBD6 gene or gene product in the immune effector cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated; and 3) introducing the modified immune effector cell into the subject.

[0044] In some embodiments of the method, the method further comprises modifying the immune effector cell to express a chimeric antigen receptor (CAR) that is capable of binding specifically to an antigen.

[0045] In some embodiments of the method, the method further comprises modifying an MBD5, BAP1, and / or ASXL1 gene(s) or gene product(s) in the immune effector cell so that the expression and / or function of MBD5, BAP1. and / or ASXL1 in the cell is reduced or eliminated.

[0046] In some embodiments of the method, the subject is a human or a mouse.

[0047] In one aspect, provided herein is a guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence of ACACUCCAGACCGCACUUGCNGG (SEQ ID NO: 168), GUAGCUACGGGUUUGCUCCANGG (SEQ ID NO: 174),AGUUGUAGGAGGAACUCGAC (SEQ ID NO: 186), CCAAGCUGUGCAACCACCGG (SEQ ID NO: 187), or GUGCUUCAAAGCCCAUCCGA (SEQ ID NO: 188).

[0048] In one aspect, provided herein is a ribonucleoprotein complex comprising the gRNA disclosed herein and a Cas9 protein.Attorney Docket No: 243734.000222BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figs. 1A-1E. Fig. 1A is a representative summary' graph of the longitudinal percentage of Rosa, MBD5 KO, and MBD5&6 double KO P14 cells among total CD8 T cells isolated from the peripheral blood of LCMV treated mice during chronic LCMV infection. Fig. IB is a summary graph of each marker’s expression on Rosa, MBD6 KO and MBD5&6 (indicated as “MBD56”) double KO P14 cells isolated from spleen at 60 days post LCMV chronic infection. Fig. 1C is a representative FACS plots of Rosa, MBD6 KO, and MBD5&6 double KO P14 cells isolated from spleen at 60 days post infection. FIG. ID is a representative summary graph of the longitudinal percentage of each indicated surface markers among P14 cells of Rosa, Mbd6 and Mbd5 / 6 KO P14 cells isolated from the peripheral blood during chronic LCMV infection. FIG. IE is a Western blot data for H2AK119Ub expression in activated Rosa and MBD6 KO mouse CD8 T cell ex vivo with summary graph of western blot data quantification.DETAILED DESCRIPTION

[0050] Recent efforts to better understand the poised nature of endogenous and adoptively transferred tumor specific CD8 T cells have revealed that the stem-like nature of the cells is coupled to epigenetic programs that preserve T cell memory' potential (1, 12, 13). The present disclosure, among other things, demonstrates that MBD6 supports a critical role in regulating CD8 T cell sternness and homeostasis. Data described herein, in particular, show that MBD6 KO and MBD5&6 double KO T cells retain a stem-like state of T cell differentiation.Definitions

[0051] The term “immune effector cell” as used herein refers to a cell that is involved in an immune response, e.g., in the promotion of an immune effector response against pathogens and / or diseases. Non-limiting examples of immune effector cells include T cells (e.g., aP T cells and y§ T cells), B cells, natural killer (NK) cells, natural killer T (NKT) cells, mast cells, and myeloid-derived phagocytes. Immune effector cells include stem cells, such as induced pluripotent stem cells (iPSCs), that are capable of differentiating into immune cells.

[0052] The terms “T cell” and “T lymphocyte” are interchangeable and used synonymously herein. As used herein, T cell includes thymocytes, naive T lymphocytes, immature T lymphocytes, mature T lymphocytes, resting T lymphocytes, or activated T lymphocytes. A T cell can be a T helper (Th) cell, for example a T helper 1 (Thl) or a T helper 2 (Th2) cell. The T cell can be a CD8+ T cell, a CD4+ T cell, a helper T cell or T-helper cell (HTL; CD4+ TAttorney Docket No: 243734.000222 cell), a cytotoxic T cell (CTL; CD8+ T cell), a tumor infiltrating cytotoxic T cell (TIL; CD8+ T cell). CD4+CD8+ T cell, or any other subset of T cells. Other illustrative populations of T cells suitable for use in particular embodiments include naive T cells and memory T cells. Also included are “a(3 T cell receptor (TCR) T cells”, which refer to a population of T cells that possess a TCR composed of a- and -TCR chains. Also included are “NKT cells”, which refer to a specialized population of T cells that express a semi-invariant 0 T-cell receptor, but also express a variety of molecular markers that are typically associated with NK cells, such as NK1.1. NKT cells include NK1.1+ andNKl. l-, as well as CD4+, CD4-, CD8+ and CD8- cells. The TCR on NKT cells is unique in that it recognizes glycolipid antigens presented by the MHC I-like molecule CD Id. NKT cells can have either protective or deleterious effects due to their abilities to produce cytokines that promote either inflammation or immune tolerance. Also included are ‘'gamma-delta T cells (y5 T cells),” which refer to a specialized population that to a small subset of T cells possessing a distinct TCR on their surface, and unlike the majority of T cells in which the TCR is composed of two glycoprotein chains designated a- and -TCR chains, the TCR in y5 T cells is made up of a y-chain and a 5-chain. y5 T cells can play a role in immunosurveillance and immunoregulation, and were found to be an important source of IL-17 and to induce robust CD8+ cytotoxic T cell response. Also included are “regulatory' T cells” or “Tregs”, which refer to T cells that suppress an abnormal or excessive immune response and play a role in immune tolerance. Tregs cells are typically transcription factor Foxp3-positive CD4+T cells and can also include transcription factor Foxp3 -negative regulatory T cells that are IL-10-producing CD4+T cells.

[0053] The terms “natural killer cell” and “NK cell” are used interchangeably and synonymously herein. As used herein, NK cell refers to a differentiated lymphocyte with a CD 16+ CD56+ and / or CD57+ TCR- phenotype. NKs are characterized by their ability to bind to and kill cells that fail to express “self’ MHC / HLA antigens by the activation of specific cytolytic enzymes, the ability to kill tumor cells or other diseased cells that express a ligand for NK activating receptors, and the ability to release protein molecules called cytokines that stimulate or inhibit the immune response.

[0054] The term “chimeric antigen receptor” or “CAR” as used herein is defined as a cellsurface receptor comprising an extracellular antigen-binding domain, a transmembrane domain and a cytoplasmic domain comprising a lymphocyte activation domain and, optionally, at least one co-stimulatory signaling domain, all in a combination that is not naturally found together on a single protein. This particularly includes receptors wherein the extracellular domain and the cytoplasmic domain are not naturally found together on a single receptor protein. TheAttorney Docket No: 243734.000222 chimeric antigen receptors of the present invention are intended primarily for use with immune effector cells such as T cells and natural killer (NK) cells.

[0055] As used herein, the term “antigen” refers to any agent (e.g., protein, peptide, polysaccharide, glycoprotein, glycolipid, nucleic acid, portions thereof, or combinations thereof) molecule capable of being bound by a T-cell receptor. An antigen is also able to provoke an immune response. An example of an immune response may involve, without limitation, antibody production, or the activation of specific immunologically competent cells, or both. A skilled artisan will understand that an antigen need not be encoded by a “gene” at all. It is readily apparent that an antigen can be generated, synthesized, or can be derived from a biological sample, or might be a macromolecule besides a polypeptide. Such a biological sample can include, but is not limited to a tissue sample, a tumor sample, a cell or a fluid with other biological components, organisms, subunits ofproteins / antigens, and killed or inactivated whole cells or lysates.

[0056] The term “antigen-binding moiety” refers to a target-specific binding element that may be any ligand that binds to the antigen of interest or a polypeptide or fragment thereof, wherein the ligand is either naturally derived or synthetic. Examples of antigen-binding moieties include, but are not limited to, antibodies; polypeptides derived from antibodies, such as, for example, single chain variable fragments (scFv), Fab, Fab', F(ab')2, and Fv fragments; polypeptides derived from T cell receptors, such as, for example, TCR variable domains; secreted factors (e.g., cytokines, growth factors) that can be artificially fused to signaling domains (e.g., “zytokines”); and any ligand or receptor fragment (e.g., CD27, NKG2D) that binds to the antigen of interest. Combinatorial libraries could also be used to identify peptides binding with high affinity' to the therapeutic target.

[0057] The terms “antibody” and “antibodies” refer to monoclonal antibodies, multispecific antibodies, human antibodies, humanized antibodies, chimeric antibodies, singlechain Fvs (scFv), single chain antibodies, Fab fragments, F(ab') fragments, disulfide-linked Fvs (sdFv), intrabodies, minibodies, diabodies and anti-idiotypic (anti-Id) antibodies (including, e.g., anti-Id antibodies to antigen-specific TCR), and epitope-binding fragments of any of the above. The terms “antibody” and “antibodies” also refer to covalent diabodies such as those disclosed in U.S. Pat. Appl. Pub. 2007 / 0004909 and Ig-DARTS such as those disclosed in U.S. Pat. Appl. Pub. 2009 / 0060910, each of which are incorporated by reference in their entirety for all purposes. Antibodies useful as a TCR-binding molecule include immunoglobulin molecules and immunologically active fragments of immunoglobulin molecules, i.e., molecules that contain an antigen-binding site. Immunoglobulin molecules canAttorney Docket No: 243734.000222 be of any type (e.g., IgG, IgE, IgM, IgD, IgA and IgY), class (e.g., IgGl, IgG2, IgG3, IgG4, IgMl, IgM2. IgAl and IgA2) or subclass. Also included are “bispecific antibodies”, which refer to antibodies that are capable of binding to two different antigens or different epitopes of the same antigen.

[0058] The term “host cell” means any cell that contains a heterologous nucleic acid. The heterologous nucleic acid can be a vector (e.g., an expression vector). For example, a host cell can be a cell from any organism that is selected, modified, transformed, grown, used or manipulated in any way, for the production of a substance by the cell, for example the expression by the cell of a gene, a DNA or RNA sequence, a protein or an enzy me.

[0059] Host cells of the present invention include immune effector cells such as, T cells and natural killer cells that contain the DNA or RNA sequences encoding the CAR and express the CAR on the cell surface. Host cells may be used for enhancing T cell activity, natural killer cell activity, treatment of cancer, and treatment of autoimmune disease.

[0060] The terms “activation” or “stimulation” means to induce a change in their biologic state by which the immune effector cells (e.g. , T cells and NK cells) express activation markers, produce cytokines, proliferate and / or become cytotoxic to target cells. All these changes can be produced by primary stimulatory signals. Co-stimulatory signals can amplify’ the magnitude of the primary’ signals and suppress cell death following initial stimulation resulting in a more durable activation state and thus a higher cytotoxic capacity . A “co-stimulatory signal” refers to a signal, which in combination with a primary signal, such as TCR / CD3 ligation, leads to immune effector cell’s (e.g., T cell and / or NK cell) proliferation and / or upregulation or downregulation of key molecules.

[0061] The term “proliferation” refers to an increase in cell division, either symmetric or asymmetric division of immune effector cells. The term “expansion” refers to the outcome of cell division and cell death.

[0062] The term “differentiation” refers to a method of decreasing the potency’ or proliferation of an immune effector cell or moving the immune effector cell to a more developmentally restricted state.

[0063] The terms “express” and “expression” mean allowing or causing the information in a gene or DNA sequence to become produced, for example producing a protein by activating the cellular functions involved in transcription and translation of a corresponding gene or DNA sequence. A DNA sequence is expressed in or by a cell to form an “expression product” such as a protein. The expression product itself, e.g., the resulting protein, may also be said to beAttorney Docket No: 243734.000222“expressed” by the cell e.g., immune effector cell. An expression product can be characterized as intracellular, extracellular or transmembrane.

[0064] The term “transfection” means the introduction of a “foreign” (i.e., extrinsic or extracellular) nucleic acid into a cell using recombinant DNA technology. The term “genetic modification” means the introduction of a “foreign” (z.e., extrinsic or extracellular) gene, DNA or RNA sequence to a host cell e.g., an immune effector cell, so that the host cell will express the introduced gene or sequence to produce a desired substance, typically a protein or enzyme coded by the introduced gene or sequence. The introduced gene or sequence may also be called a “cloned” or “foreign” gene or sequence, may include regulatory or control sequences operably linked to polynucleotide encoding the chimeric antigen receptor, such as start, stop, promoter, signal, secretion, or other sequences used by a cell's genetic machinery. The gene or sequence may include nonfunctional sequences or sequences with no known function. A host cell that receives and expresses introduced DNA or RNA has been “genetically engineered” or “modified.” The DNA or RNA introduced to a host cell can come from any source, including cells of the same genus or species as the host cell, or from a different genus or species.

[0065] The term “transduction” means the introduction of a foreign nucleic acid into a cell e.g., an immune effector cell, using a viral vector.

[0066] The terms “genetically modified” or “genetically engineered” refers to the addition of extra genetic material in the form of DNA or RNA into a cell e.g., immune effector cell.

[0067] As used herein, the term “derivative” in the context of proteins or polypeptides (e.g., CAR constructs or domains thereof) refer to: (a) a polypeptide that has at least 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 98% or 99% sequence identity to the polypeptide it is a derivative of; (b) a polypeptide encoded by a nucleotide sequence that has at least 40%. 45%, 50%, 55%, 60%, 65%, 70%, 75%. 80%, 85%, 90%, 95%, 98% or 99% sequence identity' to a nucleotide sequence encoding the polypeptide it is a derivative of; (c) a polypeptide that contains 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 or more amino acid mutations (i.e., additions, deletions and / or substitutions) relative to the polypeptide it is a derivative of; (d) a polypeptide encoded by nucleic acids can hybridize under high, moderate or typical stringency hybridization conditions to nucleic acids encoding the polypeptide it is a derivative of; (e) a polypeptide encoded by a nucleotide sequence that can hybridize under high, moderate or typical stringency hybridization conditions to a nucleotide sequence encoding a fragment of the polypeptide, it is a derivative of, of at least 20 contiguous amino acids, at least 30 contiguous amino acids, at least 40 contiguous amino acids, at least 50 contiguous amino acids, at least 75 contiguous amino acids, at least 100 contiguous aminoAttorney Docket No: 243734.000222 acids, at least 125 contiguous amino acids, or at least 150 contiguous amino acids; or (f) a fragment of the polypeptide it is a derivative of.

[0068] Percent sequence identity can be determined using any method known to one of skill in the art. In a specific embodiment, the percent identity is determined using the “Best Fit” or “Gap” program of the Sequence Analysis Software Package (Version 10; Genetics Computer Group, Inc., University of Wisconsin Biotechnology Center. Madison, Wisconsin). Information regarding hybridization conditions (e.g.. high, moderate, and typical stringency conditions) have been described, see, e.g., U.S. Patent Application Publication No. US 2005 / 0048549 (e.g., paragraphs 72-73).

[0069] Percent sequence identity can be determined using a global alignment between two sequences. As used herein, the term “global alignment” refers to an alignment of residues between two amino acid or nucleic acid sequences along their entire length, introducing gaps as necessary if the two sequences do not have the same length, to achieve a maximum percent identity . A global alignment can be created using the global alignment tool “Needle” from the online European Molecular Biology Open Software Suite (EMBOSS) (see www.ebi.ac.uk / Tools / psa / emboss_needle / ) or the global alignment tool “BLAST® » Global Alignment” from the National Center for Biotechnology Information (NCBI) (see blast.ncbi. nlm.nih.gov / Blast. cgi?PROGRAM=blastn&PAGE_TYPE=BlastSearch&PROG_D EFAULTS=on&BLAST_INIT=GlobalAln&BLAST_SPEC=GlobalAln&BLAST_PROGRA MS=blastn). Both of these global alignment tools incorporate the Needleman-Wunsch algorithm (Needleman, S.B. & Wunsch, C.D. (1970) “A general method applicable to the search for similarities in the amino acid sequences of two proteins.” J. Mol. Biol. 48:443-453). In a preferred embodiment, a global alignment of nucleotide sequences using BLAST Global Alignment uses the following default parameters: match score = 2; mismatch score = -3; Gap Cost Existence score = 5; Gap Cost Extension Score = 2. In a preferred embodiment, a global alignment of protein sequences using BLAST Global Alignment uses the following default parameters: Gap Cost Existence = 11; Gap Cost Extension = 1.

[0070] The term “variant” as used herein refers to a modified polypeptide, protein, or polynucleotide that has substantial or significant sequence identity or similarity to a wild-type polypeptide, protein, or polynucleotide. The variant may retain the same, or have altered (e.g., improved, reduced or abolished) biological activity relative to the wild-type polypeptide, protein, or polynucleotide of which it is a variant. The variant may contain an insertion, a deletion, a substitution of at least one amino acid residue or nucleotide.Attorney Docket No: 243734.000222

[0071] The terms “vector’", “cloning vector’ and “expression vector’" mean the vehicle by which a DNA or RNA sequence (e.g., a foreign gene) can be introduced into a host cell e.g., an immune effector cell, so as to genetically modify the host cell and promote expression (e.g., transcription and translation) of the introduced sequence. Vectors include plasmids, synthesized RNA and DNA molecules, phages, viruses, etc. In some embodiments, the vector is a viral vector such as, but not limited to. an adenoviral, adeno-associated. alphaviral, herpes, lentiviral, retroviral, baculoviral. or vaccinia vector.

[0072] The term “regulatory element” refers to any cis-acting genetic element that controls some aspect of the expression of nucleic acid sequences. In some embodiments, the term “promoter” comprises essentially the minimal sequences required to initiate transcription. In some embodiments, the term “promoter” includes the sequences to start transcription, and in addition, also include sequences that can upregulate or downregulate transcription, commonly termed “enhancer elements” and “repressor elements”, respectively.

[0073] As used herein, the term “operatively linked,” and similar phrases, when used in reference to nucleic acids or amino acids, refer to the operational linkage of nucleic acid sequences or amino acid sequences, respectively, placed in functional relationships with each other. For example, an operatively linked promoter, enhancer elements, open reading frame, 5' and 3' UTR, and terminator sequences result in the accurate production of a nucleic acid molecule (e.g., RNA). In some embodiments, operatively linked nucleic acid elements result in the transcription of an open reading frame and ultimately the production of a polypeptide (i.e., expression of the open reading frame). As another example, an operatively linked peptide is one in which the functional domains are placed with appropriate distance from each other to impart the intended function of each domain.

[0074] The term “site-specific nuclease” as used herein refers to a nuclease capable of specifically recognizing and cleaving a nucleic acid (DNA or RNA) sequence. Suitable sitespecific nucleases for use in the present invention include, but are not limited to, RNA-guided endonuclease (e.g., CRISPR-associated (Cas) proteins), zinc finger nuclease, a TALEN nuclease, or mega-TALEN nuclease.

[0075] By “enhance” or “promote,” or “increase” or “expand” or “improve” refers generally to the ability of a composition contemplated herein to produce, elicit, or cause a greater physiological response (i.e., downstream effects) compared to the response caused by either vehicle or a control molecule / composition. A measurable physiological response may include an increase in T cell expansion, activation, effector function, persistence, and / or an increase in antitumor activity (e.g., cancer cell death or cancer cell killing ability), amongAttorney Docket No: 243734.000222 others apparent from the understanding in the art and the description herein. In some embodiments, an “increased’" or “enhanced” amount can be a “statistically significant” amount, and may include an increase that is 1.1, 1.2, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 30 or more times (e.g., 500, 1000 times) (including all integers and decimal points in between and above 1, e.g., 1.5, 1.6, 1.7. 1.8, etc.) the response produced by vehicle or a control composition.

[0076] By “decrease” or “lower,” or “lessen,” or “reduce,” or “abate” refers generally to the ability of composition contemplated herein to produce, elicit, or cause a lesser physiological response (i.e., downstream effects) compared to the response caused by either vehicle or a control molecule / composition. In some embodiments, a “decrease” or “reduced” amount can be a “statistically significant” amount, and may include a decrease that is 1.1, 1.2, 1.5, 2, 3, 4, 5, 6, 7. 8, 9, 10, 15, 20, 30 or more times (e.g., 500. 1000 times) (including all integers and decimal points in between and above 1, e.g., 1.5, 1.6, 1.7. 1.8, etc.) the response (reference response) produced by vehicle, a control composition, or the response in a particular cell lineage.

[0077] The terms “inhibit” or “inhibition” as used herein refer to reducing a function or activity to an extent sufficient to achieve a desired biological or physiological effect. Inhibition may be complete or partial.

[0078] The terms “treat” or “treatment” of a state, disorder or condition include: (1) preventing, delaying, or reducing the incidence and / or likelihood of the appearance of at least one clinical or sub-clinical symptom of the state, disorder or condition developing in a subject that may be afflicted with or predisposed to the state, disorder or condition, but does not yet experience or display clinical or subclinical symptoms of the state, disorder or condition; or (2) inhibiting the state, disorder or condition, i.e., arresting, reducing or delaying the development of the disease or a relapse thereof or at least one clinical or sub-clinical symptom thereof; or (3) relieving the disease, i.e., causing regression of the state, disorder or condition or at least one of its clinical or sub-clinical symptoms. The benefit to a subject to be treated is either statistically significant or at least perceptible to the patient or to the physician.

[0079] The term “effective” applied to dose or amount refers to that quantity of a compound or pharmaceutical composition that is sufficient to result in a desired activity upon administration to a subject in need thereof. Note that when a combination of active ingredients is administered, the effective amount of the combination may or may not include amounts of each ingredient that would have been effective if administered individually. The exact amount required will vary from subject to subject, depending on the species, age, and general conditionAttorney Docket No: 243734.000222 of the subject, the severity of the condition being treated, the particular drug or drugs employed, the mode of administration, and the like.

[0080] The phrase ’‘pharmaceutically acceptable”, as used in connection with compositions described herein, refers to molecular entities and other ingredients of such compositions that are physiologically tolerable and do not typically produce untoward reactions when administered to a mammal (e g., a human). Preferably, the term “pharmaceutically acceptable” means approved by a regulatory agency of the Federal or a state government or listed in the U.S. Pharmacopeia or other generally recognized pharmacopeia for use in mammals, and more particularly in humans.

[0081] The term “protein” is used herein encompasses all kinds of naturally occurring and synthetic proteins, including protein fragments of all lengths, fusion proteins and modified proteins, including without limitation, glycoproteins, as well as all other types of modified proteins (e.g., proteins resulting from phosphorylation, acetylation, myristoylation, palmitoylation, glycosylation, oxidation, formylation, amidation, polyglutamylation, ADP- ribosylation, pegylation, biotinylation, etc ).

[0082] The terms “nucleic acid”, “nucleotide”, and “polynucleotide” encompass both DNA and RNA unless specified otherwise. By a “nucleic acid sequence” or “nucleotide sequence” is meant the nucleic acid sequence encoding an amino acid, the term may also refer to the nucleic acid sequence including the portion coding for any amino acids added as an artifact of cloning, including any amino acids coded for by linkers

[0083] The terms “patient”, “individual”, “subject”, and “animal” are used interchangeably herein and refer to mammals, including, without limitation, human and veterinary animals (<?.g., cats, dogs, cows, horses, sheep, pigs, etc.) and experimental animal models. In a preferred embodiment, the subject is a human.

[0084] The term “carrier” refers to a diluent, adjuvant, excipient, or vehicle with which the compound is administered. Such pharmaceutical carriers can be sterile liquids, such as water and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like. Water or aqueous solution saline solutions and aqueous dextrose and glycerol solutions are preferably employed as carriers, particularly for injectable solutions. Alternatively, the carrier can be a solid dosage form carrier, including but not limited to one or more of a binder (for compressed pills), a glidant, an encapsulating agent, a flavorant, and a colorant. Suitable pharmaceutical carriers are described in “Remington’s Pharmaceutical Sciences” by E.W. Martin.Attorney Docket No: 243734.000222

[0085] Singular forms “a”, "an", and “the” include plural references unless the context clearly dictates otherwise. Thus, for example, a reference to “a method” includes one or more methods, and / or steps of the type described herein, which will become apparent to those persons skilled in the art upon reading this disclosure.

[0086] The term “about” or “approximately” includes being within a statistically meaningful range of a value. Such a range can be within an order of magnitude, preferably within 50%, more preferably within 20%, still more preferably within 10%, and even more preferably within 5% of a given value or range. The allowable variation encompassed by the term “about” or “approximately” depends on the particular system under study, and can be readily appreciated by one of ordinary skill in the art.

[0087] If aspects of the disclosure are described as “comprising” a feature, or versions there of (e.g., comprise), embodiments also are contemplated “consisting of’ or “consisting essentially of’ the feature.

[0088] The practice of the present invention employs, unless otherwise indicated, conventional techniques of statistical analysis, molecular biology (including recombinant techniques), microbiology, cell biology, and biochemistry, which are within the skill of the art. Such tools and techniques are described in detail in e.g., Sambrook et al. (2001) Molecular Cloning: A Laboratory Manual. 3rd ed. Cold Spring Harbor Laboratory Press: Cold Spring Harbor, New York; Ausubel et al. eds. (2005) Current Protocols in Molecular Biology. John Wiley and Sons. Inc.: Hoboken, NJ; Bonifacino et al. eds. (2005) Current Protocols in Cell Biology. John Wiley and Sons, Inc.: Hoboken, NJ; Coligan et al. eds. (2005) Current Protocols in Immunology, John Wiley and Sons, Inc.: Hoboken, NJ; Coico et al. eds. (2005) Current Protocols in Microbiology. John Wiley and Sons, Inc.: Hoboken, NJ; Coligan et al. eds. (2005) Current Protocols in Protein Science, John Wiley and Sons, Inc.: Hoboken, NJ; and Erma et al. eds. (2005) Current Protocols in Pharmacology, John Wiley and Sons, Inc.: Hoboken, NJ. Additional techniques are explained, e.g., in U.S. Patent No. 7,912,698 and U.S. Patent Appl. Pub. Nos. 2011 / 0202322 and 2011 / 0307437.

[0089] The technology illustratively described herein suitably may be practiced in the absence of any element(s) not specifically disclosed herein.

[0090] The terms and expressions which have been employed are used as terms of description and not of limitation, and use of such terms and expressions do not exclude any equivalents of the features shown and described or portions thereof, and various modifications are possible within the scope of the technology claimed.Attorney Docket No: 243734.000222Modified Immune Effector Cells

[0091] In one aspect, the invention provides a modified immune effector cell with enhanced immune cell function, e.g., preserved developmental potential (i.e., preserved stemlike state of differentiation). In particular, the immune effector cell is modified such that the expression and / or function Methyl-CpG Binding Domain Protein 6 (MBD6) in the cell is reduced or eliminated. In some embodiments, a MBD6 gene or gene product is modified in the cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated.

[0092] In some embodiments, the immune effector cell is further modified to reduce or eliminate the expression and / or function of Methyl-CpG Binding Domain Protein 5 (MBD5), BRCAl-associated protein-1 (BAP1), and / or Additional Sex Combs Like Transcriptional Regulator 1 (ASXL1) gene(s) or gene product(s).

[0093] In some embodiments, the immune effector cell is a T cell. T cells may include, but are not limited to. thymocytes, naive T lymphocytes, immature T lymphocytes, mature T lymphocytes, resting T lymphocytes, or activated T lymphocytes. A T cell can be a T helper (Th) cell, for example a T helper 1 (Thl) or a T helper 2 (Th2) cell. The T cell can be a helper T cell (HTL; CD4+ T cell) CD4+ T cell, a cytotoxic T cell (CTL; CD8+ T cell), a tumor infiltrating cytotoxic T cell (TIL; CD8+ T cell), CD4+ CD8+ T cell, or any other subset of T cells. Other illustrative populations of T cells suitable for use in particular embodiments include naive T cells, memory T cells, and NKT cells.

[0094] In some embodiments, the T cell may be a CD8+ T cell, a CD4+ T cell, a cy totoxic T cell, an a[3 T cell receptor (TCR) T cell, a natural killer T (NKT) cell, a y5 T cell, a memory T cell, a T-helper cell, or a regulatory T cell (Treg).

[0095] The modification may be applied to all forms of T cell therapies, which include but are not limited to, therapies with: i) T cells that express a chimeric antigen receptor (CAR); ii) T cells that express an endogenous aP TCR or an endogenous y5 TCR, which may be specific for. e.g., a peptide derived from viral or tumor-associated antigens (including neoantigens); iii) T cells that transgenically express an o.p TCR or a y5 TCR, which may be specific for, e.g., a peptide derived from viral or tumor-associated antigens (including neoantigens); iv) T cells that transgenically express bispecific antibodies, which recognize viral or tumor-associated antigens (including neoantigens) / or a peptide derived from them and an activating molecule expressed on T cells such as CD3; and / or v) T cells that are generated via stimulation with for examples but not limited to peptides, antigen presenting and / or artificial antigen presentingAttorney Docket No: 243734.000222 cells (in vitro sensitized [IVS] T cell therapy). Lastly, T cell therapies in which the therapeutic genes are delivered in vivo are also included (in vivo T cell therapy).

[0096] In some embodiments, the immune effector cell is a T cell. Non-limiting examples of a T cell include a CD8+ T cell, a CD4+ T cell, a cytotoxic T cell, an a|3 T cell receptor (TCR) T cell, a natural killer T (NKT) cell, a y5 T cell, a memory7T cell, a T-helper cell, and a regulatory T cell (Treg).

[0097] In some embodiments, the immune effector cell is a natural killer (NK) cell. NK cell refers to a differentiated lymphocyte with a CD3- CD16+, CD3- CD56+, CD16+ CD56+ and / or CD57+ TCR- phenotype.

[0098] In some embodiments, the immune effector cell is a stem cell that is capable of differentiating into an immune cell. The stem cell may be an induced pluripotent stem cell (iPSC).

[0099] The members of the methyl-CpG-binding domain (MBD) family are primary candidates for the readout of DNA methylation as they recruit chromatin remodelers, histone deacetylases, and methylases to methylated DNA associated with gene suppression. MBD5 and MBD6 contain an N-terminal MBD domain and localize to pericentric heterochromatin, and both proteins contain proline-rich domains. Both MBD5 and MBD6 interact directly with the polycomb deubiquitinase complex (PR-DUB), which catalyzes deubiquitination of H2AK118 (in Drosophila) and H2AK119 (in vertebrates). MBD5 and MBD6 bind to the C- terminal PHD fingers of the large scaffold subunits Additional Sex Combs Like Transcriptional Regulator (ASXL)l -3 and stabilize the BRCA1 -associated protein-1 (BAP I) complex at chromatin. Dysfunction of the BAP1 complex is frequently found in many human cancers (e.g., uveal melanoma, malignant mesothelioma, renal cell carcinoma, lung, ovarian, pancreatic, breast, and meningioma). Without wishing to be bound by theory, depletion of MBD6, and possibly MBD5, leads to a loss of BAP1 occupancy at chromatin, resulting in a reduction of BAP 1 -dependent gene expression and tumor grow th in vitro and in vivo.

[0100] The full-length human MBD6 protein contains 1,003 amino acids and has an N- terminal MBD, a central proline-rich segment, and 2 C-terminal nuclear localization signals (NLSs). MBD6 gene is mapped to chromosome 12ql3.3 based on an alignment of the MBD6 sequence (GenBank BC065530) with the genomic sequence (GRCh38). Additional gene information for the MBD6 gene includes HGNC (20445), NCBI Gene (114785), Ensembl (ENSG00000166987), OMIM® (619458) UniProtKB / Swiss-Prot (Q96DN6), and Open Targets Platform (ENSG00000166987).Attorney Docket No: 243734.000222

[0101] In some embodiments, an MBD6 gene or gene product is modified in a cell disclosed herein so that the expression and / or function of MBD6 in the cell e.g.. immune effector cell, is reduced or eliminated. In some embodiments the level of functional MBD6 protein in the immune effector cell is reduced by about 50% or more. The level of functional MBD6 protein in the immune effector cell may be reduced by from about 50% to about 60%, from about 50% to about 70%, from about 50% to about 80%, from about 50% to about 90%, more than 60%, from about 60% to about 70%, from about 60% to about 80%, from about 60% to about 90%, more than about 70%, from about 70% to about 80%, from about 70% to about 90%, more than about 80%, from about 80% to about 90%, more than 90%, from about 90% to about 95%, from about 90% to about 98%, more than 95%, from about 95% to about 98%, more than about 98%, or more than about 99%. The level of functional MBD6 protein in the immune effector cell may be reduced by about 50%, about 55%, about 60%, about 65%, about 70%, about 75%, about 80%, about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, about 99% or even 100%.

[0102] In some embodiments, the MBD6 gene is deleted or defective so that no detectable functional (e.g., wild-type) MBD6 protein is produced. The MBD6 gene may be deleted or become defective using the methods described herein.

[0103] In some embodiments, an MBD6 gene or gene product and an MBD5 gene or gene product are both modified in the same cell e.g., immune effector cell, so that the expression and / or function of MBD6 and MBD5 in the cell is reduced or eliminated. In some embodiments, the MBD6 and the MBD5 gene are deleted and / or defective in the immune effector cell so that no detectable functional (e.g., wild- type) MBD6 and MBD5 protein are produced.

[0104] In some embodiments, an MBD6 gene or gene product and a BAP1 gene or gene product are both modified in the same cell e.g., immune effector cell, so that the expression and / or function of MBD6 and BAP1 in the cell is reduced or eliminated. In some embodiments, the MBD6 and the BAP1 gene are deleted and / or defective in the immune effector cell so that no detectable functional (e.g., wild-ty pe) MBD6 and BAP1 protein are produced.

[0105] In some embodiments, a MBD6 gene or gene product and a ASXL1 gene or gene product are both modified in the same cell e.g., immune effector cell, so that the expression and / or function of MBD6 and ASXL1 in the cell is reduced or eliminated. In some embodiments, the MBD6 and the ASXL1 gene are deleted and / or defective in the immune effector cell so that no detectable functional (e.g., wild-ty pe) MBD6 and ASXL1 protein are produced.Attorney Docket No: 243734.000222

[0106] In some embodiments, an MBD6 gene or gene product and a MBD5, BAP1, and / or ASXL1 gene(s) or gene product(s) are modified in the same cell e.g.. immune effector cell, so that the expression and / or function of MBD6 and MBD5, BAP1, and / or ASXL1 in the cell is reduced or eliminated. In some embodiments, the MBD6 and the MBD5, B API, and / or ASXL1 gene(s) are deleted and / or defective in the immune effector cell so that no detectable functional (e.g., wild-type) MBD6 and MBD5, BAP1, and / or ASXL1 proteins are produced.

[0107] The full-length human MBD5 protein has 2 isoforms. The longer isoform (isoform- 1) contains 1,448 amino acids and has an N-terminal MBD, a proline-rich segment, a proline- tryptophan-tryptophan-proline (PWWP) domain, and 2 nuclear localization signals (NLS). The shorter isoform (isoform-2) contains 851 amino acids and has an N-terminal MBD, a prolinerich segment, and an NLS. The MBD5 gene is mapped to chromosome 2, specifically chromosome 2q23.1. Additional gene information for the MBD5 gene includes HGNC (20444), NCBI Gene (55777), Ensembl (ENSG00000204406), OMIM® (611472), and UniProtKB / Swiss-Prot (Q9P267). In some embodiments, the isoform- 1 of MBD5 is deleted and / or defective in the immune effector cell so that no detectable functional protein of isoform- 1 of MBD5 is produced. In some embodiments, both the isoform-1 and isoform-2 of MBD5 are deleted and / or defective in the immune effector cell so that no detectable functional protein of MBD5 is produced.

[0108] In some embodiments, an MBD5 gene or gene product is modified in a cell e.g., immune effector cell, disclosed herein so that the expression and / or function of MBD5 in the cell is reduced or eliminated. In some embodiments, the level of functional MBD5 protein in the immune effector cell is decreased by about 50% or more. The level of functional MBD5 protein in the immune effector cell may be decreased by from about 50% to about 60%, from about 50% to about 70%, from about 50% to about 80%, from about 50% to about 90%, more than 60%, from about 60% to about 70%, from about 60% to about 80%, from about 60% to about 90%, more than about 70%, from about 70% to about 80%. from about 70% to about 90%, more than about 80%, from about 80% to about 90%, more than 90%, from about 90% to about 95%, from about 90% to about 98%, more than 95%, from about 95% to about 98%, more than about 98%, or more than about 99%. The level of functional MBD5 protein in the immune effector cell may be decreased by about 50%, about 55%, about 60%, about 65%, about 70%. about 75%, about 80%, about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, about 99% or even 100%.Attorney Docket No: 243734.000222

[0109] In some embodiments, the MBD5 gene is deleted or defective so that no detectable functional (e.g., wild-type) MBD5 protein is produced. The MBD5 gene may be deleted or become defective using the methods described herein.

[0110] In some embodiments, the MBD6 gene and the MBD5 gene may be deleted (e.g., knocked out) in the same cell using the methods described herein.

[0111] BRCA1 -associated protein-1 (BAP1) is a member of the ubiquitin hydroxyl- terminal hydrolase family, whose essential function is to remove ubiquitination modification of substrate proteins. The Bapl protein is involved in the regulation of various cellular functions such as cell proliferation, cell differentiation, programmed cell death, DNA loss repair, chromatin modification, and the like. BAP1 gene mutations occur frequently in uveal melanoma, malignant mesothelioma, and renal cell carcinoma, and most early studies suggest BAP1 as an anti-cancer gene. However, in recent years, it has been reported that BAP1 can promote the development of breast cancer by its deubiquitinating function.

[0112] In the full-length human BAP1 protein, the N-terminal 240 amino acids of the predicted 729-amino acid protein show homology to ubiquitin C-terminal hydrolases, thiol proteases that catalyze proteolytic processing of ubiquitin. BAP1 additionally contains an acidic region, a highly charged C-terminal region, and 2 putative nuclear localization signals. The BAP1 gene is mapped to chromosome 3, specifically chromosome 3p21.3. Additional gene information for the BAP1 gene includes HGNC (950), NCBI Gene (8314), Ensembl (ENSG00000163930). OMIM® (603089), and UniProtKB / Swiss-Prot (Q92560).

[0113] In some embodiments, a BAP1 gene or gene product is modified in a cell e.g., immune effector cell, disclosed herein so that the expression and / or function of BAP 1 in the cell is reduced or eliminated. In some embodiments, the level of functional BAP1 protein in the immune effector cell is decreased by about 50% or more. The level of functional BAP1 protein in the immune effector cell may be decreased by from about 50% to about 60%, from about 50% to about 70%, from about 50% to about 80%, from about 50% to about 90%, more than 60%, from about 60% to about 70%, from about 60% to about 80%, from about 60% to about 90%, more than about 70%, from about 70% to about 80%. from about 70% to about 90%. more than about 80%. from about 80% to about 90%, more than 90%. from about 90% to about 95%, from about 90% to about 98%, more than 95%, from about 95% to about 98%, more than about 98%, or more than about 99%. The level of functional BAP1 protein in the immune effector cell may be decreased by about 50%, about 55%, about 60%, about 65%, about 70%. about 75%, about 80%, about 85%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, about 99% or even 100%.Attorney Docket No: 243734.000222

[0114] In some embodiments, the BAP1 gene is deleted or defective so that no detectable functional (e.g., wild-type) BAP1 protein is produced. The BAP1 gene may be deleted or become defective using the methods described herein.

[0115] In some embodiments, the MBD6 gene and the BAP1 gene may be deleted (e.g., knocked out) in the same cell e.g., immune effector cell, using the methods described herein.

[0116] ASXL1 is involved in the regulation or recruitment of the Polycomb-group repressor complex (PRC) and trithorax-group (trxG) activator complex. ASXL1 interacts with KDMIA (LSDI), BAP1, NCOA1 and nuclear hormone receptors (NHRs). ASXL1 is involved in transcriptional repression through an interaction with PRC2 and to transcriptional regulation through interactions with BAP1. ASXL1 is overexpressed in cervical cancer and mutations of ASXL1 are detected in prostate and breast cancers, colorectal cancers with microsatellite instability (MSI), head and neck squamous cell carcinoma, malignant myeloid diseases, chronic lymphocytic leukemia, and liver cancer.

[0117] The full-length human ASXL1 protein contains 1,541 amino acids. The N-terminal region of ASXL1 contains a serine-rich region, 3 nuclear localization signals, a PEST motif, a nuclear receptor-binding motif, and a region that shares high sequence identity with Drosophila asx, called the asx homology domain (AHD). The AHD is followed by a glycine-rich region, 3 additional PEST sequences, and a C-terminal plant homeodomain (PHD). ASXL1 lacks the AT-hook motif and the nucleotide-binding motif of Drosophila asx. The ASXL1 gene is mapped to chromosome 20ql 1.21. Additional gene information for the ASXL1 gene includes HGNC (18318), NCBI Gene (171023), Ensembl (ENSG0000017I456), OMIM® (612990), and UniProtKB / Swiss-Prot (Q8IXJ9).

[0118] In some embodiments, an ASXL1 gene or gene product is modified in a cell e.g., immune effector cell, disclosed herein so that the expression and / or function of ASXL1 in the cell is reduced or eliminated. In some embodiments, the level of functional ASXL1 protein in the immune effector cell is decreased by about 50% or more. The level of functional ASXLlprotein in the immune effector cell may be decreased by from about 50% to about 60%, from about 50% to about 70%, from about 50% to about 80%, from about 50% to about 90%, more than 60%, from about 60% to about 70%, from about 60% to about 80%, from about 60% to about 90%, more than about 70%, from about 70% to about 80%, from about 70% to about 90%, more than about 80%, from about 80% to about 90%, more than 90%, from about 90% to about 95%, from about 90% to about 98%, more than 95%, from about 95% to about 98%, more than about 98%, or more than about 99%. The level of functional ASXL1 protein in the immune effector cell may be decreased by about 50%, about 55%, about 60%, about 65%,Attorney Docket No: 243734.000222 about 70%, about 75%, about 80%, about 85%, about 90%, about 91%, about 92%, about 93%, about 94%. about 95%, about 96%, about 97%, about 98%. about 99% or even 100%.

[0119] In some embodiments, the ASXL1 gene is deleted or defective so that no detectable functional (e.g., wild-type) ASXL1 protein is produced. The ASXL1 gene may be deleted or become defective using the methods described herein.

[0120] In some embodiments, the MBD6 gene and the ASXL1 gene may be deleted (e.g., knocked out) in the same cell e.g.. immune effector cell, using the methods described herein.

[0121] In some embodiments, the MBD6 gene and the MBD5 gene, BAP1 gene, and / or the ASXL1 gene may be deleted (e.g., knocked out) in the same cell e.g., immune effector cell, using the methods described herein.

[0122] In some embodiments, in addition to modifying an MBD6 gene or gene product and / or a MBD5 gene or gene product and / or a BAP1 gene or gene product and / or a ASXL1 gene or gene product, a STAT5 signaling pathway is activated in the immune effector cell. In some embodiments, the STAT5 signaling pathway is activated by a signaling molecule. The signaling molecule may be a common gamma chain cytokine. Non-limiting examples of cytokines that may be used in the methods described herein include IL-15, IL-7. IL-2. IL-4. IL- 9, and IL-21. The cytokine may be a native or modified cytokine. In some embodiments, the signaling molecule is IL-15. In some embodiments, the signaling molecule is IL-7.

[0123] In some embodiments, the STAT5 signaling pathway is activated by modifying the immune effector cell to express a constitutively active cytokine receptor or a switch receptor. Constitutively active cytokine receptors may trigger the activation of a cytokine signaling cascade even in the absence of extracellular cytokine. This may circumvent the need for providing extracellular cytokines to the immune effector cell. A non-limiting example of a constitutively active cytokine receptor is a constitutively active IL7 receptor (C7R). Such constitutively active cytokine receptor may be generated using methods described in Shum T et al. Cancer Discov. 2017;7(l 1): 1238-1247, which is incorporated herein in its entirety for all purposes.

[0124] A switch receptor (also known as inverted cytokine receptor), which is capable of converting a potentially inhibitory signal into a positive signal, is also contemplated by the present invention. Non-limiting examples of switch receptors that may also be used in the methods described herein include an IL4 / IL7 receptor and an IL4 / IL2 receptor. Such receptors may be generated as described in Bajgain, P. et al., J Immunother Cancer. 2018;6(l):34 and Wilkie. S. et al., J Biol Chem. 2010:285(33):25538-44, both of which are incorporated herein by reference in their entirety for all purposes. In some embodiments, the modified immuneAttorney Docket No: 243734.000222 effector cell further comprises at least one surface molecule capable of binding specifically to an antigen. The antigen may be a tumor antigen, a viral antigen, a bacterial antigen, a fungal antigen, a parasite antigen, a prion antigen, or an antigen associated with an inflammation or an autoimmune disease.

[0125] In some embodiments, the antigen is a tumor antigen. Non-limiting examples of tumor antigens that may be targeted by the modified immune effector cell described herein include B-cell maturation antigen (BCMA), human epidermal growth factor receptor 2 (HER2), interleukin- 13 receptor subunit alpha-2 (IL-13Ra2), ephrin type- A receptor 2 (EphA2), A kinase anchor protein 4 (AKAP-4), adrenoceptor beta 3 (ADRB3), anaplastic lymphoma kinase (ALK), immunoglobulin lambda- like polypeptide 1 (IGLL1), androgen receptor, angiopoietin-binding cell surface receptor 2 (Tie 2), B7-H3 (CD276), bone marrow stromal cell antigen 2 (BST2), carbonic anhydrase IX (CAIX), CCCTC-binding factor (Zinc Finger Protein)-like (BORIS), CD171, CD179a, CD24, CD300 molecule-like family member f (CD300LF), CD38, CD44v6, CD72, CD79a, CD79b, CD97, chromosome X open reading frame 61 (CXORF61), claudin 6 (CLDN6), CS-1 (CD2 subset 1, CRACC, SLAMF7, CD319, or 19A24), C-type lectin domain family 12 member A (CLEC12A), C-type lectin-like molecule-1 (CLL-1), Cyclin B 1, Cytochrome P450 IB 1 (CYP1B 1), EGF-like modulecontaining mucin-like hormone receptor-like 2 (EMR2), epidermal growth factor receptor (EGFR), ERG (transmembrane protease, serine 2 (TMPRSS2) ETS fusion gene), ETS translocation-variant gene 6. located on chromosome 12p (ETV6-AML), Fc fragment of IgA receptor (FCAR), Fc receptor-like 5 (FCRL5), Fms-like tyrosine kinase 3 (FLT3), Folate receptor beta, Fos-related antigen 1, Fucosyl GM1, G protein-coupled receptor 20 (GPR20), G protein-coupled receptor class C group 5, member D (GPRC5D), ganglioside GD3, ganglioside GM3, glycoceramide (GloboH), Glypican-3 (GPC3), Hepatitis A virus cellular receptor 1 (HAVCR1), hexasaccharide portion of globoH, high molecular weight-melanoma-associated antigen (HMWMAA), human Telomerase reverse transcriptase (hTERT), interleukin 11 receptor alpha (IL-1 IRa), KIT (CD117), leukocyte-associated immunoglobulin-like receptor 1 (LAIR1). leukocyte immunoglobulin-like receptor subfamily A member 2 (LILRA2), Lewis(Y) antigen, lymphocyte antigen 6 complex, locus K 9 (LY6K), lymphocyte antigen 75 (LY75), lymphocyte-specific protein tyrosine kinase (LCK), mammary gland differentiation antigen (NY-BR-1), melanoma cancer testis antigen-1 (MAD-CT-1), melanoma cancer testis antigen-2 (MAD-CT-2), melanoma inhibitor of apoptosis (ML-IAP), mucin 1, cell surface associated (MUC1). N-acetyl glucosaminyl-transferase V (NA17), neural cell adhesion molecule (NCAM), o-acetyl-GD2 ganglioside (OAcGD2), olfactory receptor 51E2 (OR51E2),Attorney Docket No: 243734.000222 p53 mutant, paired box protein Pax-3 (PAX3), paired box protein Pax-5 (PAX5), pannexin 3 (PANX3), placenta-specific 1 (PLAC1). platelet-derived grow th factor receptor beta (PDGFR- beta). Poly sialic acid, proacrosin binding protein sp32 (OY-TES 1), prostate stem cell antigen (PSCA), Protease Serine 21 (PRSS21), Proteasome (Prosome, Macropain) Subunit, Beta Type, 9 (LMP2), Ras Homolog Family Member C (RhoC), sarcoma translocation breakpoints, sialyl Lewis adhesion molecule (sLe), sperm protein 17 (SPA17), squamous cell carcinoma antigen recognized by T cells 3 (SART3). stage-specific embryonic antigen-4 (SSEA-4). synovial sarcoma, X breakpoint 2 (SSX2), TCR gamma alternate reading frame protein (TARP), TGS5, thyroid stimulating hormone receptor (TSHR), Tn antigen (Tn Ag), tumor endothelial marker 1 (TEM1 / CD248), tumor endothelial marker 7-related (TEM7R), uroplakin 2 (UPK2), vascular endothelial growth factor receptor 2 (VEGFR2), v-myc avian myelocytomatosis viral oncogene neuroblastoma derived homolog (MYCN), Wilms tumor protein (WT1), and X Antigen Family, Member 1A (XAGE1), or a fragment or variant thereof.

[0126] Additional antigens that may be targeted by the extracellular target-binding domain include, but are not limited to, carbonic anhydrase EX, alpha-fetoprotein. A3, antigen specific for A33 antibody. Ba 733. BrE3-antigen, CA125. CD1, CDla, CD3, CD5. CD15. CD16. CD19, CD20, CD21, CD22, CD23, CD25, CD30, CD33, CD38, CD45, CD74, CD79a, CD80, CD123, CD138, colon-specific antigen-p (CSAp), CEA (CEACAM5), CEACAM6, CSAp, EGFR, EGP-I. EGP-2, Ep-CAM, EphAl, EphA3, EphA4. EphA5, EphA6, EphA7, EphA8, EphAlO. EphBl, EphB2. EphB3, EphB4. EphB6, FIt-I, Flt-3, folate receptor. HLA-DR, human chorionic gonadotropin (HCG) and its subunits, hypoxia inducible factor (HTF-I), la, IL-2, IL-6, IL-8, insulin growth factor- 1 (IGF -I), KC4-antigen, K.S-1 -antigen, KS1-4, Le-Y, macrophage inhibition factor (MIF), MAGE. MUC1, MUC2, MUC3, MUC4, NCA66, NCA95, NCA90, antigen specific for PAM-4 antibody, placental growth factor, p53. prostatic acid phosphatase, PSA, PSMA, RS5, SI 00, TAC, TAG-72, tenascin, TRAIL receptors. Tn antigen, Thomson-Friedenreich antigens, tumor necrosis antigens, VEGF, ED-B fibronectin, 17-lA-antigen, an angiogenesis marker, an oncogene marker or an oncogene product.

[0127] In some embodiments, the tumor antigen targeted by the modified immune effector cell is B-cell maturation antigen (BCMA). human epidermal growth factor receptor 2 (HER2). IL13Ra2, erythropoietin -pro ucing human hepatocellular receptor A2 (EphA2), B7 homolog 3 protein (B7-H3), Cluster of Differentiation (CD) 19 (CD19), CD22, or CD123.

[0128] In some embodiments, the tumor antigen targeted by the modified immune effector cell is CD19. CD22, CD123. CD33, or a fragment or variant thereof.Attorney Docket No: 243734.000222

[0129] In some embodiments, the tumor antigen targeted by the modified immune effector cell is HER2, IL13Ra2, or EphA2, or a fragment or variant thereof.

[0130] In some embodiments, the tumor antigen targeted by the modified immune effector cell is BCMA. B-cell maturation antigen (BCMA), also referred to as CD269 and tumor necrosis factor receptor superfamily member 17 (TNFRSF17), is expressed on cells of the B- cell lineage and is overexpressed in some types of cancers.

[0131] In some embodiments, the tumor antigen targeted by the modified immune effector cell is HER2. Human epidermal growth factor receptor 2 (HER2), also referred to as HER2 / neu, receptor tyrosine-protein kinase erbB-2, CD340 (cluster of differentiation 340), proto-oncogene Neu, or ERBB2, a membrane tyrosine kinase and oncogene that is overexpressed in some types of cancer.

[0132] In some embodiments, the tumor antigen targeted by the modified immune effector cell is IL13Ra2. Interleukin- 13 receptor subunit alpha-2 (IL13Ra2), also referred to as CD213A2 (cluster of differentiation 213A2), is a membrane bound protein that, in humans, is encoded by the IL13RA2 gene.

[0133] In some embodiments, the tumor antigen targeted by the modified immune effector cell is EphA2. Ephrin type-A receptor 2 (EphA2), also referred to as Eck (epithelial cell kinase), Myk2, or Sek2, a member of the Eph receptor tyrosine kinase family which binds Ephrins Al, 2, 3, 4, and 5.

[0134] In some embodiments, the tumor antigen targeted by the modified immune effector cell is B7-H3 (CD276), or a fragment or variant thereof. B7 Homolog 3 (B7-H3) or CD276 (cluster of differentiation 276) is a ty pe I transmembrane protein that is an immune checkpoint molecule and a costimulatory / coinhibitory immunoregulatory protein. Without wishing to be bound by theory. B7-H3 is highly expressed in tumor tissues (e.g., breast cancer, lung cancer, ovarian cancer, brain tumor, gastric cancer, and squamous cell carcinoma) where it participates in shaping and development of the tumor microenvironment, while showing limited expression in normal tissues. B7-H3 may also support pro-tumorigenic functions, e.g., enhanced invasive and migratory properties, and has been correlated with worsened prognosis, poor survival, and recurrence rate. In some embodiments, the modified immune effector cell further comprises a chimeric antigen receptor (CAR), an antigen specific T-cell receptor, or a bispecific antibody.

[0135] In some embodiments, the antigen is a viral antigen. A non-limiting example of a viral antigen that may be targeted by the modified immune effector cell described herein is gpl20.Attorney Docket No: 243734.000222

[0136] In some embodiments, the modified immune effector cell further comprises an antigen specific T-cell receptor. Antigen specific T-cell receptors are T-cell receptors (TCRs) that are specific for recognizing a particular antigen. In some embodiments, the modified immune effector cell comprises a T cell receptor (TCR), or a functional fragment thereof. By way of a non-limiting example, a functional fragment of a TCR may immunospecifically bind to a particular antigen (or epitope) while retaining the capability to immunospecifically bind to the antigen (or epitope). In various embodiments, a functional fragment of a TCR may comprise at least one complementary determining region (CDR) of the alpha chain and / or beta chain of the TCR. In various embodiments, a functional fragment of a TCR may comprise two or more complementary determining regions (CDRs) of the alpha chain and / or beta chain of the TCR. In various embodiments, a functional fragment of a TCR may comprise at least one complementary determining region (CDR) of the gamma chain and / or delta chain of the TCR. In various embodiments, a functional fragment of a TCR may comprise two or more complementary determining regions (CDRs) of the gamma chain and / or delta chain of the TCR.

[0137] In some embodiments, the TCR disclosed herein may comprise, for example, one or more of an alpha (a) chain of a TCR, a beta ( ) chain of a TCR, a delta (8) chain of a TCR, a gamma (y) chain of a TCR, or a combination thereof. In some embodiments, the TCR may further comprise a constant region. The constant region may be derived from any suitable species such as, e.g.. human or mouse.

[0138] In some embodiments, the TCR may comprise an alpha chain and / or a beta chain of the TCR. In some embodiments, the TCR may comprise, e.g., constant regions of alpha and / or beta chains of the TCR.

[0139] In some embodiments, the antigen specific TCR may recognize, without limitation, any of the antigens (e.g., an antigen(s) on a cancer cell) disclosed herein. In various embodiments, the TCR of the disclosure may specifically bind to an antigen selected from, for example, CD7, CD74, CDS, CEA. EGP-2, EGP-40, EpCAM, erb-B2,3,4, FBP, fetal acetylcholine receptor, folate receptor-a, GD2, GD3. HER2. hTERT, IL-13R- a2, KDR. K- light chain, LeY, LI cell, MAGE-AL Mesothelm, MUC1, MUC16, NKG2D ligands, NY-ESO- 1, oncofetal antigen (h5T4), PSCA, PSMA, ROR1, TAG-72, VEGF-R2, and WT-1.

[0140] In some embodiments, the modified immune effector cell further comprises a bispecific antibody. Bispecific antibodies are antibodies that are capable of binding to two different antigens or two different epitopes of the same antigen. For example, the modified immune effector cell may comprise a bispecific antibody that is capable of binding to aAttorney Docket No: 243734.000222 molecule on the immune effector cell and is also capable of binding to an antigen on a target cell.Chimeric Antigen Receptor (CAR)

[0141] In some embodiments, the modified immune effector cell further comprises a chimeric antigen receptor (CAR).

[0142] CARs are typically comprised primarily of 1) an extracellular antigen-binding domain comprising an antigen-binding moiety, such as a single-chain variable fragment (scFv) derived from an antigen-specific monoclonal antibody, and 2) a cytoplasmic domain comprising a lymphocyte activation domain, such as the ^-chain from the T cell receptor CD3. These two regions are fused together via a transmembrane domain. Upon transduction, the lymphocyte expresses the CAR on its surface, and upon contact and ligation with the target antigen, it signals through the lymphocyte activation domain (e.g., CD3^ chain) inducing cytotoxicity and cellular activation.

[0143] In some embodiments, the modified immune effector cell disclosed herein may comprise a CAR comprising, for example, (i) an extracellular antigen-binding domain, (ii) a transmembrane domain, and (iii) a cytoplasmic domain.

[0144] Constructs with only the antigen-specific binding region together with the lymphocyte activation domain are termed first-generation CARs. While activation of lymphocytes through a lymphocyte activation domain such as CD3^ is sufficient to induce tumor-specific killing, such CARs fail to optimally induce T cell proliferation and survival in vivo. The second-generation CARs added co-stimulatory polypeptides to boost the CAR- induced immune response. For example, the co-stimulating polypeptide CD28 signaling domain was added to the CAR construct. This region generally contains the transmembrane region of the co-stimulatory peptide (in place of the CD3^ transmembrane domain) with motifs for binding other molecules such as PI3K and Lek. T cells expressing CARs with only CD3^ vs CARs with both CD3^ and a co-stimulatory domain (e.g., CD28) demonstrated the CARs expressing both domains achieve greater activity . The most commonly used co-stimulating molecules include CD28 and 4-1BB. which promote both T cell proliferation and cell survival. The third-generation CAR includes three signaling domains (e.g., CD3C,, CD28. and 4-1BB). which further improves lymphocyte cell survival and efficacy. Examples of third-generation CARs include CD 19 CARs, most notably for the treatment of chronic lymphocytic leukemia (Milone, M. C , et al., (2009) Mol. Ther. 17: 1453-1464; Kalos, M., et al., Sci. Transl. Med. (2011) 3:95ra73; Porter. D.. et al., (2011) N. Engl. J. Med. 365: 725-533, each of which is herein incorporated by reference in their entirety for all purposes). Studies in three patientsAttorney Docket No: 243734.000222 showed impressive function, expanding more than a 1000-fold in vivo, and resulted in sustained remission in all three patients.

[0145] In some embodiments, the CAR expressed by a modified immune effector cell described herein comprises an extracellular antigen-binding domain and a transmembrane domain. In some embodiments, the CAR further comprises a cytoplasmic domain. Each domain is fused in frame.

[0146] In some embodiments, the CAR expressed by a modified immune effector cell described herein is a first-generation CAR. In some embodiments, the CAR expressed by a modified immune effector cell described herein is a second-generation CAR.

[0147] Extracellular Antigen-Binding Domain of the CAR

[0148] The choice of extracellular antigen-binding domain depends upon the type and number of antigens that define the surface of a target cell. For example, the extracellular antigen-binding domain may be chosen to recognize an antigen that acts as a cell surface marker on target cells associated with a particular disease state. In some embodiments, the CARs can be genetically modified to target a tumor antigen of interest by way of engineering a desired extracellular antigen-binding domain that specifically binds to an antigen (e.g., on a cancer cell). Non-limiting examples of cell surface markers that may act as targets for the extracellular antigen-binding domain of the CAR include those associated with viral, bacterial and parasitic infections, autoimmune disease, and cancer cells.

[0149] In some embodiments, the extracellular antigen-binding domain comprises an antigen-binding polypeptide or functional variant thereof that binds to an antigen. In some embodiments, the antigen-binding polypeptide is an antibody or an antibody fragment that binds to an antigen.

[0150] In some embodiments, the antigen-binding polypeptide can be monomeric or multimeric (e.g. , homodimeric or heterodimeric), or associated with multiple proteins in a non- covalent complex. In some embodiments, the extracellular antigen-binding domain may consist of an Ig heavy chain. In some embodiments, the Ig heavy chain can be covalently associated with Ig light chain (e.g., via the hinge and optionally the CHI region). In some embodiments, the Ig heavy chain may become covalently associated with other Ig heavy / light chain complexes (e.g., by the presence of hinge, CH2, and / or CH3 domains). In the latter case, the heavy / light chain complex that becomes joined to the chimeric construct may constitute an antibody with a specificity distinct from the antibody specificity of the chimeric construct. In some embodiments, the entire chain may be used. In some embodiments, a truncated chain may be used, where all or a part of the CHI, CH2, or CH3 domains may be removed, or all or partAttorney Docket No: 243734.000222 of the hinge region may be removed. Non-limiting examples of antigen-binding polypeptides include antibodies and antibody fragments such as, e.g., murine antibodies, rabbit antibodies, human antibodies, fully humanized antibodies, single chain variable fragments (scFv), single chain antibodies, Fab fragments, F(ab') fragments, disulfide-linked Fvs (sdFv), intrabodies, minibodies, or diabodies, camelid antibody variable domains and humanized versions, shark antibody variable domains and humanized versions, single domain antibody variable domains, nanobodies (VHHs). and camelized antibody variable domains. In some embodiments, the antigen-binding polypeptide includes an scFv.

[0151] An extracellular antigen-binding domain of the present disclosure comprises an extracellular antigen-binding moiety. In some embodiments, the extracellular antigen-binding moiety comprises an antibody or an antibody fragment that binds to an antigen. Antigenbinding moieties may comprise antibodies and / or antibody fragments such as monoclonal antibodies, multispecific antibodies, chimeric antibodies, single-chain Fvs (scFv), single chain antibodies, Fab fragments, F(ab') fragments, disulfide-linked Fvs (sdFv), intrabodies, minibodies, single domain antibody variable domains, nanobodies (VHHs), diabodies and anti- idiotypic (anti-Id) antibodies (including, e.g., anti-Id antibodies to antigen specific TCR), and epitope-binding fragments of any of the above. Antibodies and / or antibody fragments may be derived from murine antibodies, rabbit antibodies, human antibodies, fully humanized antibodies, camelid antibody variable domains and humanized versions, shark antibody variable domains and humanized versions, and camelized antibody variable domains.

[0152] In some embodiments the extracellular antigen-binding moiety comprises an scFv capable of binding to, e.g., CD19, CD22, CD123, CD33, B7-H3 (CD276), BCMA, HER2, IL13Ra2, EphA2, and / or gpl20.

[0153] In some embodiments, the antigen-binding moiety comprises a ligand. Non-limiting examples of CARs comprising an antigen-binding moiety comprising a ligand include IL- 13 mutein-CARs or CD27-CARs. In some embodiments, the antigen-binding moiety may comprise a peptide sequence. Non-limiting examples of CARs comprising an antigen-binding moiety comprising a peptide sequence include chlorotoxin and GRP78-CARs. See, for example. PCT Patent Application WO / 2021 / 216994, which is herein incorporated by reference in its entirety.

[0154] In some embodiments, the antigen-binding moiety binds to at least one tumor antigen. In some embodiments, the antigen-binding moiety binds to two or more tumor antigens. In some embodiments, the two or more tumor antigens are associated with the sameAttorney Docket No: 243734.000222 tumor. In some embodiments, the two or more tumor antigens are associated with different tumors.

[0155] In some embodiments, the antigen-binding moiety binds to at least one antigen of an extracellular matrix. In some embodiments, the antigen-binding moiety binds to two or more antigens of the extracellular matrix. In some embodiments, the two or more tumor antigens are associated with the same extracellular matrix. In some embodiments, the two or more tumor antigens are associated with different extracellular matrices.

[0156] In some embodiments, the antigen-binding moiety binds to at least one antigen present on cells within the tumor microenvironment. In some embodiments, the antigenbinding moiety binds to two or more antigens present on cells within the tumor microenvironment. In some embodiments, the two or more antigens are associated with the same cell. In some embodiments, the two or more tumor antigens are associated with different cells.

[0157] In some embodiments, the antigen-binding moiety binds to at least one autoimmune antigen. In some embodiments, the antigen-moiety domain binds to two or more autoimmune antigens. In some embodiments, the two or more autoimmune antigens are associated with the same autoimmune disease. In some embodiments, the two or more autoimmune antigens are associated with different autoimmune diseases.

[0158] In some embodiments, the antigen-binding moiety binds to at least one infectious antigen. In some embodiments, the antigen-binding moiety binds to two or more infectious antigens. In some embodiments, the two or more infectious antigens are associated with the same infectious disease. In some embodiments, the two or more infectious antigens are associated with different infectious diseases.

[0159] In some embodiments, the tumor antigen is associated with glioblastoma, ovarian cancer, cervical cancer, head and neck cancer, liver cancer, prostate cancer, pancreatic cancer, renal cell carcinoma, bladder cancer, or hematologic malignancy. Non-limiting examples of the tumor antigens associated with cervical cancer or head and neck cancer include MUC1, Mesothelin, HER2, GD2, and EGFR. Non-limiting examples of tumor antigens associated with ovarian cancer include FOLR1, FSHR, MUC16. MUCI, Mesothelin, CA125. EpCAM. EGFR. PDGFRa, Nectin-4, B7-H3 and B7-H4. Non-limiting examples of tumor antigens associated with hematological malignancies include BCMA, GPRC5D, SLAM F7, CD33, CD19, CD22, CD79, CLL1, CD123, and CD70. Non-limiting examples of tumor antigens associated with bladder cancer include Nectin-4 and SLITRK6. Non-limiting examples of tumor antigens associated with renal cancer include CD70 and FOLR1. Non-limiting examples of tumorAttorney Docket No: 243734.000222 antigen associated with glioblastoma include FGFR1, FGFR3, MET, CD70, ROBO1, IL13Ra2, HER2, EGFRvIIL EGFR. CD133, and PDGFRA. Non-limiting examples of tumor antigen associated with liver cancer include, EpCAM, cMET, AFP, Claudin 18.2, and GPC-3.

[0160] Additional examples of antigens that may be targeted by the antigen-binding moiety include, but are not limited to, alpha-fetoprotein, A3, antigen specific for A33 antibody, Ba 733, BrE3-antigen, carbonic anhydrase Ep-CAM, EphAl, EphA2, EphA3, EphA4, EphA5, EphA6, EphA7, EphA8. EphAlO. EphBl, EphB2, EphB3, EphB4. EphB6, Flt-I, Flt-3, folate receptor, HLA-DR, human chorionic gonadotropin (HCG) and its subunits, hypoxia inducible factor (HIF-I), la, IL-2, IL-6, IL-8, insulin growth factor-1 (IGF-I), KC4-antigen, KS-1- antigen, KS1-4, Le-Y, macrophage inhibition factor (MIF), MAGE, MUC2, MUC3, MUC4, NCA66, NCA95, NCA90. EX, EGFR, EGP-I, EGP-2, antigen specific for PAM-4 antibody, placental growth factor, p53, prostatic acid phosphatase, PSA, PSMA, RS5, S100, CD1, CDla, CD3, CD5, CD15, CD16, CD19, CD20, CD21, CD22, CD23, CD25, CD30, CD33, CD38, CD45, CD74, CD79a, CD80, CD123, CD138, colon-specific antigen-p (CSAp), CEA (CEACAM5), CEACAM6, CSAp, TAC, TAG-72, tenascin, VEGF, ED-B fibronectin, COL11A1. 17-lA-antigen, TRAIL receptors, Tn antigen, Thomson-Friedenreich antigens, tumor necrosis antigens, an oncogene marker, an oncogene product, or an angiogenesis marker.

[0161] In some embodiments, the antigen is associated with an autoimmune disease or disorder. Such antigens may be derived from cell receptors and cells which produce “selT’- directed antibodies. In some embodiments, the antigen is associated with an autoimmune disease or disorder such as, psoriasis, vasculitis, Wegener's granulomatosis, Hashimoto's thyroiditis, Graves' disease, chronic inflammatory demyelinating polyneuropathy, Guillain- Barre syndrome, Crohn's disease, ulcerative colitis, Rheumatoid arthritis (RA), multiple sclerosis (MS), Sjogren's syndrome. Systemic lupus erythematosus, sarcoidosis. Type 1 diabetes melhtus, insulin dependent diabetes mellitus (IDDM), autoimmune thyroiditis, reactive arthritis, ankylosing spondylitis, scleroderma, polymyositis, dermatomyositis, or Myasthenia gravis.

[0162] In some embodiments, autoimmune antigens that may be targeted by the CAR disclosed herein include, but are not limited, to islet cell antigen, platelet antigens, Sm antigens in snRNPs, myelin protein antigen. Rheumatoid factor, and anticitrullinated protein., glucose- 6-phosphate isomerase, receptors such as lipocortin 1, neutrophil nuclear proteins such as lactoferrin and 25-35 kD nuclear protein, granular proteins such as bactericidal permeability increasing protein (BPI), elastase fibrinogen, fibrin, vimentin, filaggrin. collagen I and II peptides, alpha-enolase, citrullinated proteins and peptides such as CCP-1, CCP-2 (cyclicalAttorney Docket No: 243734.000222 citrullinated peptides), translation initiation factor 4G1, perinuclear factor, keratin, Sa (cytoskeletal protein vimentin), circulating serum proteins such as RFs (IgG, IgM), fibrinogen, plasminogen, components of articular cartilage such as collagen II, IX, and XI, ferritin, nuclear components such as RA33 / hnRNP A2, Sm, stress proteins such as HSP-65, -70, -90, BiP, inflammatory / immune factors such as B7-H1, IL-1 alpha, and IL-8, enzymes such as calpastatin. alpha-enolase, eukaryotic translation elongation factor 1 alpha laldolase-A, dipeptidyl peptidase, osteopontin. cathepsin G. myeloperoxidase, proteinase 3, antigen, islet cell antigen, rheumatoid factor, histones, ribosomal P proteins platelet antigens, myelin protein, cardiolipin, vimentin, nucleic acids such as, and RNA, ribonuclear particles and proteins such as Sm antigens (including but not limited to SmD's and SmB7B), U1RNP, A2 / B1 hnRNP, Ro (SSA), and La (SSB) antigens. dsDNA, and ssDNA.

[0163] In some embodiments, the antigen targeted by CARs of the present disclosure is an antigen expressed in the tumor stroma. Exemplary antigens expressed in the tumor stroma that may be targeted by CARs of the present disclosure include, but are not limited to, oncofetal splice variants of fibronectin and tenascin C. tumor-specific splice variants of collagen, and fibroblast activating protein (FAP).

[0164] In some embodiments, the antigen targeted by CARs of the present disclosure is an antigens expressed on endothelial cell. Exemplary antigens expressed on endothelial cells that may be targeted by CARs of the present disclosure include, but are not limited to, VEGF receptors, and tumor endothelial markers (TEMs).

[0165] Exemplary infectious associated antigens that may be targeted by the modified immune effector cells of the present disclosure include those derived from Adenoviridcie (most adenoviruses); Arena viridae (hemorrhagic fever viruses); Birnaviridae Bungaviridae (e.g., Hantaan viruses, bunga viruses, phleboviruses and Nairo viruses); Calciviridae (e.g., strains that cause gastroenteritis); Coronoviridae e.g., coronaviruses); Filoviridae (e.g., ebola viruses); Flaviridae (e.g., dengue viruses, encephalitis viruses, yellow fever viruses); Hepadnaviridae (Hepatitis B virus; HBsAg); Herpesviridae (herpes simplex virus (HSV) 1 and 2, varicella zoster virus, cytomegalovirus (CMV), herpes virus); Irldoviridae (e.g., African swine fever virus); Norwalk and related viruses, and astroviruses; Orthomyxoviridae (e.g., influenza viruses); Papovaviridae (papilloma viruses, polyoma viruses); Paramyxoviridae (e.g., parainfluenza viruses, mumps virus, measles virus, respiratory' syncytial virus); Parvoviridae (parvoviruses); Picornaviridae (e.g., polio viruses, hepatitis A virus; enteroviruses, human Coxsackie viruses, rhinoviruses, echoviruses); Poxvindae (variola viruses, vaccinia viruses, pox viruses); Reoviridae (e.g., reoviruses, orbiviurses andAttomey Docket No: 243734.000222 rotaviruses); Retroviridae (e.g., human immunodeficiency viruses, such as HIV-1 (also referred to as HTLV-III, LAV or HTLV-III / LAV, or HIV -III); and other isolates, such as HIV- LP); Rhabdoviradae (e.g.. vesicular stomatitis viruses, rabies viruses); Togaviridae (e.g, equine encephalitis viruses, rubella viruses); and unclassified viruses (e.g., the etiological agents of Spongiform encephalopathies, the agent of delta hepatitis, the agents of non- A, non- B hepatitis (i.e., Hepatitis C)).

[0166] Additional infectious antigens that may be targeted by the modified immune effector cells of the present disclosure include bacterial antigens, fungal antigens, parasite antigens, or prion antigens, or the like. Non-limiting examples of infectious bacteria include but are not limited to: Actinomyces israelii, Bacillus antracis, Bacteroides sp., Borelia burgdorferi, Chlamydia., Clostridium perfringens, Clostridium tetani. Corynebacterium diphtheriae, Corynebacterium sp., Enterobacter aerogenes. Enterococcus sp., Erysipelothrix rhusiopathiae, Fusobacterium nucleatum, Haemophilus influenzae, Helicobacter pyloris, Klebsiella pneumoniae, Legionella pneumophilia, Leptospira, Listeria monocytogenes, Mycobacteria sps. (e.g., M tuberculosis , M avium, M gordonae, M intracellulare, M kansaii), Neisseria gonorrhoeae, Neisseria meningitidis. Pasturella multocida, pathogenic Campylobacter sp., Rickettsia, Staphylococcus aureus, Streptobacillus monihformis, Streptococcus (anaerobic sps.), Streptococcus (viridans group), Streptococcus agalactiae (Group B Streptococcus), Streptococcus bovis. Streptococcus faecalis, Streptococcus pneumoniae. Streptococcus pyogenes (Group A Streptococcus), Treponema pallidium, and Treponema pertenue. Non-limiting examples of infectious fungi include: Cryptococcus neoformans, Histoplasma capsulatuin, Coccidioides immitis, Blastomyces dernatitidis, Chlamydia trachomatis and Candida albicans. Other infectious organisms (i.e., protists) include: Plasmodium such as Plasmodium falciparum, Plasmodium malariae, Plasmodium ovale, Plasmodium vivax, Toxoplasma gondii and Shistosoma. Other medically relevant microorganisms have been descried extensively in the literature, e.g., see C. G. A. Thomas, “Medical Microbiology’', Bailliere Tindall, Great Britain 1983, which is hereby incorporated by reference in its entirety.

[0167] Other examples of antigens that may be targeted by the modified immune cells of the present disclosure include antigens expressed on immune and / or stem cells to deplete these cells such as CD45RA and c-kit.

[0168] In some embodiments, the extracellular antigen-binding domain is specific for B7- H3, or a fragment or variant thereof. In some embodiments, the scFv capable of binding to B7-Attorney Docket No: 243734.000222H3 may be derived from, for example, without limitation, antibodies MGA271, 376.96, 8H9, or humanized 8H9.

[0169] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to B7-H3 which may be derived from antibody MGA271. The scFv capable of binding to B7-H3 derived from antibody MGA271 may comprise the amino acid sequence of SEQ ID NO: 91, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65. at least 70. at least 75. at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 91. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody MGA271 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 91, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 91. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody MGA271 comprises the sequence set forth in SEQ ID NO: 92. or a nucleotide sequence having at least 50. at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91 , at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity7with SEQ ID NO: 92. In some embodiments, the anti-B7-H3 scFV derived from antibody MGA271 comprises the amino acid sequence of SEQ ID NO: 91. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody MGA271 comprises the nucleotide sequence set forth in SEQ ID NO: 92.

[0170] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to B7-H3 which may be derived from antibody 8H9. The scFv capable of binding to B7-H3 derived from antibody 8H9 may comprise the amino acid sequence of SEQ ID NO: 134, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 134. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody 8H9 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 134, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity7with SEQ ID NO: 134. In some embodiments, the nucleotide sequence encoding theAttorney Docket No: 243734.000222 anti-B7-H3 scFV derived from antibody 8H9 comprises the sequence set forth in SEQ ID NO: 135, or a nucleotide sequence having at least 50, at least 55, at least 60. at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 135. In some embodiments, the anti-B7-H3 scFV derived from antibody 8H9 comprises the amino acid sequence of SEQ ID NO: 134. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody 8H9 comprises the nucleotide sequence set forth in SEQ ID NO: 135.

[0171] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to B7-H3 which may be derived from antibody 376.96. The scFv capable of binding to B7-H3 derived from antibody 376.96 may comprise the amino acid sequence of SEQ ID NO: 140, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 140. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody 376.96 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 140, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 140. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody 376.96 comprises the sequence set forth in SEQ ID NO: 141, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 141. In some embodiments, the anti-B7-H3 scFV derived from 376.96 comprises the amino acid sequence of SEQ ID NO: 140. In some embodiments, the nucleotide sequence encoding the anti-B7-H3 scFV derived from antibody 376.96 comprises the nucleotide sequence set forth in SEQ ID NO: 141.

[0172] In some embodiments, the extracellular antigen-binding domain is specific for HER2, or a fragment or variant thereof. In some embodiments, the extracellular antigenbinding domain is specific for IL13Ra2, or a fragment or variant thereof. In some embodiments, the extracellular antigen-binding domain is specific for EphA2, or a fragment or variant thereof. In some embodiments, the extracellular antigen-binding domain is specific for CD123.Attorney Docket No: 243734.000222

[0173] In a specific embodiment, the extracellular antigen-binding domain comprises an scFv capable of binding to HER2. The scFv capable of binding to HER2 may comprise the amino acid sequence of SEQ ID NO: 17, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 17. In some embodiments, the nucleotide sequence encoding the anti-HER2 scFV comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 17, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 17. In some embodiments, the nucleotide sequence encoding the anti-HER2 scFV comprises the sequence set forth in SEQ ID NO: 18, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 18. In some embodiments, the anti-HER2 scFV comprises the amino acid sequence of SEQ ID NO: 17. In some embodiments, the nucleotide sequence encoding the anti-HER2 scFV comprises the nucleotide sequence set forth in SEQ ID NO: 18.

[0174] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to IL13Ra2. The scFv capable of binding to IL13Ra2 may comprise the amino acid sequence of SEQ ID NO: 29, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96. at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 29. In some embodiments, the nucleotide sequence encoding the anti-IL13Ra2 scFV comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 29, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96. at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 29. In some embodiments, the nucleotide sequence encoding the anti-IL13Ra2 scFV comprises the sequence set forth in SEQ ID NO: 30, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 30. In some embodiments, the anti-IL13Ra2 scFV comprises the amino acid sequence of SEQ ID NO: 29.Attorney Docket No: 243734.000222In some embodiments, the nucleotide sequence encoding the anti-IL13Ra2 scFV comprises the nucleotide sequence set forth in SEQ ID NO: 30.

[0175] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to EphA2. The scFv capable of binding to EphA2 may comprise the amino acid sequence of SEQ ID NO: 38, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%. sequence identity with SEQ ID NO: 38. In some embodiments, the nucleotide sequence encoding the anti-EphA2 scFV comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 38, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75. at least 80, at least 85, at least 90, at least 91, at least 92. at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 38. In some embodiments, the nucleotide sequence encoding the anti-EphA2 scFV comprises the sequence set forth in SEQ ID NO: 39, or a nucleotide sequence having at least 50, at least 55, at least 60. at least 65, at least 70, at least 75, at least 80, at least 85, at least 90. at least 91. at least 92. at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 39. In some embodiments, the anti-EphA2 scFV comprises the amino acid sequence of SEQ ID NO: 38. In some embodiments, the nucleotide sequence encoding the anti-EphA2 scFV comprises the nucleotide sequence set forth in SEQ ID NO: 39.

[0176] In a specific embodiment, the extracellular antigen-binding domain comprises an scFv capable of binding to CD123. In some embodiments, the anti-CD123 scFv is derived from antibody 26292 (scFV (292)). In some embodiments, the anti-CD123 scFv is derived from antibody 26716 (scFV (716)).

[0177] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to CD 123 which may be derived from antibody 26292. The scFv capable of binding to CD 123 derived from antibody 26292 may comprise the amino acid sequence of SEQ ID NO: 147, or a or a variant thereof having at least 50, at least 55, at least 60. at least 65, at least 70, at least 75, at least 80, at least 85, at least 90. at least 91. at least 92. at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity7with SEQ ID NO: 147. In some embodiments, the nucleotide sequence encoding the anti-CD123 scFV derived from antibody 26292 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 147, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, atAttorney Docket No: 243734.000222 least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 147. In some embodiments, the nucleotide sequence encoding the anti-CD123 scFV derived from antibody 26292 comprises the sequence set forth in SEQ ID NO: 148, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 148. In some embodiments, the anti-CD123 scFV derived from antibody 26292 comprises the amino acid sequence of SEQ ID NO: 147. In some embodiments, the nucleotide sequence encoding the anti-CD123 scFV derived from antibody 26292 comprises the nucleotide sequence set forth in SEQ ID NO: 148.

[0178] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to CD123 which may be derived from antibody 26716. The scFv capable of binding to CD123 derived from antibody 26716 may comprise the amino acid sequence of SEQ ID NO: 149, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90. at least 91, at least 92, at least 93. at least 94. at least 95. at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 149. In some embodiments, the nucleotide sequence encoding the anti-CD123 scFV derived from antibody 26716 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 149, or a variant thereof having at least 50, at least 55. at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91 , at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 149. In some embodiments, the nucleotide sequence encoding the anti-CD123 scFV derived from antibody 26716 comprises the sequence set forth in SEQ ID NO: 150, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 150. In some embodiments, the anti-CD123 scFV derived from antibody 26716 comprises the amino acid sequence of SEQ IDNO: 149. In some embodiments, the nucleotide sequence encoding the anti-CD123 scFV derived from antibody 26716 comprises the nucleotide sequence set forth in SEQ ID NO: 150.

[0179] In some embodiments, the extracellular antigen-binding domain is specific for BCMA, or a fragment or variant thereof. In some embodiments, the scFv capable of binding to BCMA may be derived from, for example, without limitation, antibody Cl 1D5.3.Attorney Docket No: 243734.000222

[0180] In a specific embodiment, the extracellular antigen binding domain comprises an scFv capable of binding to BCMA which may be derived from antibody C11D5.3. The scFv capable of binding to BCMA derived from antibody C11D5.3 may comprise the amino acid sequence of SEQ ID NO: 63, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 63. In some embodiments, the nucleotide sequence encoding the anti-BCMA scFV derived from antibody C11D5.3 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 63, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95. at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 63. In some embodiments, the nucleotide sequence encoding the anti-BCMA scFV derived from antibody Cl 1D5.3 comprises the sequence set forth in SEQ ID NO: 64, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92. at least 93, at least 94, at least 95. at least 96. at least 97. at least 98 or at least 99%, sequence identity with SEQ ID NO: 64. In some embodiments, the anti-BCMA scFv derived from antibody C11D5.3 comprises the amino acid sequence of SEQ ID NO: 63. In some embodiments, the nucleotide sequence encoding the anti-BCMA scFv derived from antibody C11D5.3 comprises the nucleotide sequence set forth in SEQ ID NO: 64.

[0181] In some embodiments, the extracellular antigen-binding domain is specific for gpl20, or a fragment or variant thereof. In some embodiments, the antigen binding domain binding to gp!20 may be derived from, for example, without limitation, antibody mD1.22.

[0182] In a specific embodiment, the extracellular antigen binding domain comprises an antigen binding domain capable of binding to gp!20 which may be derived from antibody mD1.22. The antigen binding domain capable of binding to gpl20 derived from antibody mDl .22 may comprise the amino acid sequence of SEQ ID NO: 65, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92. at least 93. at least 94, at least 95, at least 96, at least 97. at least 98 or at least 99%, sequence identity with SEQ ID NO: 65. In some embodiments, the nucleotide sequence encoding the anti-gp!20 antigen binding domain derived from antibody mDl.22 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 65, or a variant thereof having at least 50, at least 55. at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at leastAttorney Docket No: 243734.00022295, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 65. In some embodiments, the nucleotide sequence encoding the anti-gpI20 antigen binding domain derived from antibody mD1.22 comprises the sequence set forth in SEQ ID NO: 68, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 68. In some embodiments, the anti-gp!20 antigen binding domain derived from antibody mD1.22 comprises the amino acid sequence of SEQ ID NO: 65. In some embodiments, the nucleotide sequence encoding the anti-gpl20 antigen binding domain derived from antibody mD1.22 comprises the nucleotide sequence set forth in SEQ ID NO: 68.

[0183] In some embodiments, the extracellular antigen-binding domain is specific for gpI20, or a fragment or variant thereof. In some embodiments, the antigen binding domain binding to gp!20 may be derived from, for example, without limitation, antibody m36.4.

[0184] In a specific embodiment, the extracellular antigen binding domain comprises an antigen binding domain capable of binding to gpl20 which may be derived from antibody m36.4. The antigen binding domain capable of binding to gpl20 denved from antibody m36.4 may comprise the amino acid sequence of SEQ ID NO: 179, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%. sequence identity with SEQ ID NO: 179. In some embodiments, the nucleotide sequence encoding the anti-gpl 20 antigen binding domain derived from antibody m36.4 comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 179, or a variant thereof having at least 50, at least 55, at least 60, at least 65. at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 179. In some embodiments, the nucleotide sequence encoding the anti-gp!20 antigen binding domain derived from antibody m36.4 comprises the sequence set forth in SEQ ID NO: 180, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75. at least 80, at least 85, at least 90, at least 91, at least 92, at least 93. at least 94. at least 95. at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 180. In some embodiments, the anti-gp!20 antigen binding domain derived from antibody m36.4 comprises the amino acid sequence of SEQ ID NO: 179. In some embodiments, the nucleotide sequence encoding the anti-gpl20 antigen binding domain derived from antibody m36.4 comprises the nucleotide sequence set forth in SEQ ID NO: 180.Attorney Docket No: 243734.000222

[0185] Various non-limiting exemplary antigen targets are also displayed in Tables 1-3.

[0186] In some embodiments, the antigen-binding moiety may comprise a VH sequence, a VL sequence, and / or CDRs thereof, such as those described in the cited publications, the contents of each publication are incorporated herein by reference in their entirety for all purposes (Table 1).Table 1. Exemplary antigen-binding moieties comprising a VH sequence, a VL sequence, and / or CDRs thereofAtorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Attorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Atorney Docket No: 243734.000222Attorney Docket No: 243734.000222

[0187] In some embodiments, the antigen-binding moiety may comprise an scFv derived from an antibody or antibody fragment that binds to an antigen target such as those described in the cited publications, the contents of each publication are incorporated herein by reference in their entirety for all purposes (Table 2).Table 2. Exemplary antigen-binding moieties comprising an scFv derived from an antibody or antibody fragment that binds to an antigen targetAtorney Docket No: 243734.000222Atorney Docket No: 243734.000222Attorney Docket No: 243734.000222

[0188] In some embodiments, the antigen-binding moiety may comprise an antigenbinding moiety derived from a CAR that binds to an antigen target, such as those described in the cited publications, the contents of each publication are incorporated herein by reference in their entirety for all purposes (Table 3).Atorney Docket No: 243734.000222Table 3. Exemplary antigen-binding moieties comprising an antigen-binding moiety derived from a CAR that binds to an antigen targetAtorney Docket No: 243734.000222Atorney Docket No: 243734.000222Attorney Docket No: 243734.000222

[0189] Leader Sequence of the CAR

[0190] In some embodiments, the extracellular antigen-binding domain further comprises a leader sequence. The leader sequence may be located at the amino-terminus of the extracellular antigen-binding domain. The leader sequence may be optionally cleaved from theAttorney Docket No: 243734.000222 antigen-binding moiety during cellular processing and localization of the CAR to the cellular membrane.

[0191] In some embodiments, the leader sequence comprises the amino acid sequence of SEQ ID NO: 15, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 15. In some embodiments, the nucleotide sequence encoding the leader comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 15, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 15. In some embodiments, the nucleotide sequence encoding the leader sequence comprises the sequence set forth in SEQ ID NO: 16, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96. at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 16. In some embodiments, the leader sequence comprises the amino acid sequence of SEQ ID NO: 15. In some embodiments, the nucleotide sequence encoding the leader sequence comprises the nucleotide sequence set forth in SEQ ID NO: 16. In some embodiments, the nucleotide sequence encoding the leader sequence comprises the sequence set forth in SEQ ID NO: 37, or a nucleotide sequence having at least 50, at least 55. at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91 , at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 37. In some embodiments, the nucleotide sequence encoding the leader sequence comprises the nucleotide sequence set forth in SEQ ID NO: 37.

[0192] Transmembrane Domain of the CAR

[0193] In some embodiments, the CARs expressed by the modified immune effector cell comprise a transmembrane domain. The transmembrane domain may be fused in frame between the extracellular target-binding domain and the cytoplasmic domain.

[0194] The transmembrane domain may be derived from the protein contributing to the extracellular target-binding domain, the protein contributing the signaling or co-signaling domain, or by a totally different protein. In some instances, the transmembrane domain can be selected or modified by amino acid substitution, deletions, or insertions to minimize interactions with other members of the CAR complex. In some instances, the transmembrane domain can be selected or modified by amino acid substitution, deletions, or insertions toAttorney Docket No: 243734.000222 avoid-binding of proteins naturally associated with the transmembrane domain. In some embodiments, the transmembrane domain includes additional amino acids to allow for flexibility and / or optimal distance between the domains connected to the transmembrane domain.

[0195] The transmembrane domain may be derived either from a natural or from a synthetic source. Where the source is natural, the domain may be derived from any membrane-bound or transmembrane protein. Non-limiting examples of transmembrane domains of particular use in this invention may be derived from (i.e. comprise at least the transmembrane region(s) of) the a, (3 or chain of the T-cell receptor, CD28, CD3 epsilon, CD45, CD4, CD5, CD8, CD9, CD16, CD22, CD33, CD37, CD40, CD64, CD80, CD86, CD 134, CD 137, CD 154. Alternatively, the transmembrane domain may be synthetic, in which case it will comprise predominantly hydrophobic residues such as leucine and valine. For example, a triplet of phenylalanine, tryptophan and / or valine can be found at each end of a synthetic transmembrane domain.

[0196] In some embodiments, the transmembrane domain may be derived from CD8a, CD28, CD8, CD4, CD3 , CD40, CD134 (OX-40). NKG2A / C / D / E. or CD7. In some embodiments, the transmembrane domain may be derived from CD28.

[0197] In some embodiments, it will be desirable to utilize the transmembrane domain of the ?, i] or FceRly chains which contain a cysteine residue capable of disulfide bonding, so that the resulting chimeric protein will be able to form disulfide linked dimers with itself, or with unmodified versions of the , n or FceRly chains or related proteins. In some instances, the transmembrane domain will be selected or modified by amino acid substitution to avoid- binding of such domains to the transmembrane domains of the same or different surface membrane proteins to minimize interactions with other members of the receptor complex. In other cases, it will be desirable to employ the transmembrane domain of <, q or FceRly and - , MB1 (Igor), B29 or CD3- y,or r|, in order to retain physical association with other members of the receptor complex.

[0198] In some embodiments, the transmembrane domain is derived from CD3^, CD28, CD4. or CD8a.

[0199] In a specific embodiment, the transmembrane domain is derived from the CD3^ transmembrane domain. In some embodiments, the CD3^ transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 23, or a variant thereof having at least 50, at least 55, at least 60, at least 65. at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at leastAttorney Docket No: 243734.00022299%, sequence identity with SEQ ID NO: 23. In some embodiments, the nucleotide sequence that encodes the CD3^ transmembrane domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 23, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 23. In some embodiments, the nucleotide sequence that encodes the CD3^ transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 24, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 24. In some embodiments, the CD3^ transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 23. In some embodiments, the nucleotide sequence that encodes the CD3^ transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 24.

[0200] In a specific embodiment, the transmembrane domain is derived from the CD28 transmembrane domain. In some embodiments, the CD28 transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 31, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%. sequence identity’ with SEQ ID NO: 31. In some embodiments, the nucleotide sequence that encodes the CD28 transmembrane domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 31, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 31. In some embodiments, the nucleotide sequence that encodes the CD28 transmembrane domain comprises the nucleotide sequence set forth in SEQ ID: 32, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92. at least 93, at least 94, at least 95. at least 96. at least 97. at least 98 or at least 99%, sequence identity with SEQ ID NO: 32. In some embodiments, the CD28 transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 31. In some embodiments, the nucleotide sequence that encodes the CD28 transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 32.Attorney Docket No: 243734.000222

[0201] In a specific embodiment, the transmembrane domain is derived from the CD8a transmembrane domain. In some embodiments, the CD8a transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 49, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%. sequence identity’ with SEQ ID NO: 49. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 49, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity' with SEQ ID NO: 49. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 50, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80. at least 85, at least 90, at least 91, at least 92, at least 93, at least 94. at least 95. at least 96, at least 97, at least 98 or at least 99%. sequence identity with SEQ ID NO: 50. In some embodiments, the CD8a transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 49. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 50.

[0202] In a specific embodiment, the transmembrane domain is derived from the CD8a transmembrane domain. In some embodiments, the CD8a transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 82, or a variant thereof having at least 50, at least 55, at least 60, at least 65. at least 70, at least 75, at least 80, at least 85, at least 90. at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity' with SEQ ID NO: 82. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 82, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity’ with SEQ ID NO: 82. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 83, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91 , at least 92, at least 93, at leastAttorney Docket No: 243734.00022294, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 83. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 84, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 84. In some embodiments, the CD8a transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 82. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 83. In some embodiments, the nucleotide sequence that encodes the CD8a transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 84

[0203] In a specific embodiment, the transmembrane domain is derived from the CD4 transmembrane domain. In some embodiments, the CD4 transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 51, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85. at least 90, at least 91, at least 92. at least 93, at least 94, at least 95, at least 96. at least 97. at least 98 or at least 99%. sequence identity with SEQ ID NO: 51. In some embodiments, the nucleotide sequence that encodes the CD4 transmembrane domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 51, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70. at least 75. at least 80, at least 85, at least 90, at least 91. at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity7with SEQ ID NO: 51. In some embodiments, the nucleotide sequence that encodes the CD4 transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 52, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least95, at least 96, at least 97, at least 98 or at least 99%, sequence identity' with SEQ ID NO: 52. In some embodiments, the CD4 transmembrane domain comprises the amino acid sequence set forth in SEQ ID NO: 51. In some embodiments, the nucleotide sequence that encodes the CD4 transmembrane domain comprises the nucleotide sequence set forth in SEQ ID NO: 52.

[0204] Linker Domain of the CAR

[0205] In some embodiments, the CAR further comprises a linker domain between the extracellular antigen-binding domain and the transmembrane domain, wherein the antigenbinding domain, linker, and the transmembrane domain are in frame with each other.Attorney Docket No: 243734.000222

[0206] The term “linker domain"’ as used herein generally means any oligo- or polypeptide that functions to link the antigen-binding moiety to the transmembrane domain. A linker domain can be used to provide more flexibility and accessibility for the antigen-binding moiety. A linker domain may comprise up to 300 amino acids, preferably 10 to 100 amino acids and most preferably 25 to 50 amino acids. A linker domain may be derived from all or part of naturally occurring molecules, such as from all or part of the extracellular region of CD8. CD4 or CD28. or from all or part of an antibody constant region. Alternatively, the linker domain may be a synthetic sequence that corresponds to a naturally occurring linker domain sequence, or may be an entirely synthetic linker domain sequence. Non-limiting examples of linker domains which may be used in accordance with the invention include a part of human CD8a chain, partial extracellular domain of CD28. FcyRllla receptor, IgG, IgM. IgA, IgD, IgE, an Ig hinge, or functional fragment thereof. In some embodiments, additional linking amino acids are added to the linker domain to ensure that the antigen-binding moiety is an optimal distance from the transmembrane domain. In some embodiments, when the linker is derived from an Ig, the linker may be mutated to prevent Fc receptor binding.

[0207] In some embodiments, the linker domain comprises a hinge region. In some embodiments, the hinge region comprises the amino acid sequence SEQ ID NO: 19, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90. at least 91, at least 92, at least 93, at least 94, at least 95, at least 96. at least 97. at least 98 or at least 99%, sequence identity with SEQ ID NO: 19. In some embodiments, the nucleotide sequence encoding the hinge region comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 19, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92. at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 19. In some embodiments, the nucleotide sequence encoding the hinge region comprises the sequence set forth in SEQ ID NO: 20, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92. at least 93, at least 94, at least 95. at least 96. at least 97. at least 98 or at least 99%, sequence identity with SEQ ID NO: 20. In some embodiments, the hinge region comprises the amino acid sequence of SEQ ID NO: 19. In some embodiments, the nucleotide sequence encoding the hinge region comprises the nucleotide sequence set forth in SEQ ID NO: 20.

[0208] In some embodiments, the hinge region comprises the amino acid sequence SEQ ID NO: 78, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, atAttorney Docket No: 243734.000222 least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%. sequence identity- with SEQ ID NO: 78. In some embodiments, the nucleotide sequence encoding the hinge region comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 78, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%. sequence identity with SEQ ID NO: 78. In some embodiments, the nucleotide sequence encoding the hinge region comprises the sequence set forth in SEQ ID NO: 79, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 79. In some embodiments, the hinge region comprises the amino acid sequence of SEQ ID NO: 78. In some embodiments, the nucleotide sequence encoding the hinge region comprises the nucleotide sequence set forth in SEQ ID NO: 79.

[0209] In some embodiments, the hinge region comprises the amino acid sequence SEQ ID NO: 80, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity- with SEQ ID NO: 80. In some embodiments, the nucleotide sequence encoding the hinge region comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 80, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 80. In some embodiments, the nucleotide sequence encoding the hinge region comprises the sequence set forth in SEQ ID NO: 81, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 81. In some embodiments, the hinge region comprises the amino acid sequence of SEQ ID NO: 80. In some embodiments, the nucleotide sequence encoding the hinge region comprises the nucleotide sequence set forth in SEQ ID NO: 81.

[0210] Other hinge regions suitable for use in the present invention may be derived from an immunoglobulin IgG hinge or functional fragment, including IgGl, IgG2, IgG3, IgG4, IgMl, IgM2. IgAl, IgA2, IgD, IgE, or a chimera or variant thereof.Attorney Docket No: 243734.000222

[0211] In some embodiments, the linker domain comprises a hinge region which is an IgGl hinge. In some embodiments, the IgGl hinge comprises the amino acid sequence SEQ ID NO: 40, or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 40. In some embodiments, the nucleotide sequence encoding the IgGl hinge comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 40, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 40. In some embodiments, the nucleotide sequence encoding the IgGl hinge comprises the sequence set forth in SEQ ID NO: 41, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 41. In some embodiments, the hinge region comprises the amino acid sequence of SEQ ID NO: 40. In some embodiments, the nucleotide sequence encoding the IgGl hinge comprises the nucleotide sequence set forth in SEQ ID NO: 41.

[0212] In some embodiments, the linker domain comprises the amino acid sequence SEQ ID NO: 21. or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80. at least 85. at least 90, at least 91, at least 92, at least 93. at least94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 21. In some embodiments, the nucleotide sequence encoding the linker domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 21, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70. at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 21. In some embodiments, the nucleotide sequence encoding the linker domain comprises the sequence set forth in SEQ ID NO: 22. or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75. at least 80. at least 85, at least 90, at least 91, at least 92. at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 22. In some embodiments, the linker domain comprises the amino acid sequence of SEQ ID NO: 21. In some embodiments, the nucleotide sequence encoding the linker domain comprises the nucleotide sequence set forth in SEQ ID NO: 22. In some embodiments, the nucleotide sequence encoding the linker domain comprises the sequence setAttorney Docket No: 243734.000222 forth in SEQ ID NO: 42, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75. at least 80, at least 85, at least 90, at least 91, at least 92. at least93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 42. In some embodiments, the nucleotide sequence encoding the linker domain comprises the nucleotide sequence set forth in SEQ ID NO: 42.

[0213] In some embodiments, the linker domain comprises the amino acid sequence SEQ ID NO: 119. or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 119. In some embodiments, the nucleotide sequence encoding the linker domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 119, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 119. In some embodiments, the nucleotide sequence encoding the linker domain comprises the sequence set forth in SEQ ID NO: 120, or a nucleotide sequence having at least 50. at least 55. at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 120. In some embodiments, the linker domain comprises the amino acid sequence of SEQ ID NO: 119. In some embodiments, the nucleotide sequence encoding the linker domain comprises the nucleotide sequence set forth in SEQ ID NO: 120.

[0214] Cytoplasmic Domain of the CAR

[0215] In some embodiments, the CAR expressed by the immune effector cell described herein further comprises a cytoplasmic domain. In some embodiments, the cytoplasmic domain of the CAR comprises one or more lymphocyte activation domains.

[0216] The cytoplasmic domain, which comprises the lymphocyte activation domain of the CAR, is responsible for activation of at least one of the normal effector functions of the lymphocyte in which the CAR has been placed in. The term “effector function” refers to a specialized function of a cell. Effector function of a T cell, for example, may be cytolytic activity’ or helper activity including the secretion of cytokines. Thus, the term “lymphocyte activation domain” refers to the portion of a protein which transduces the effector function signal and directs the cell to perform a specialized function. While usually the entire lymphocyte activation domain is present, in many cases it is not necessary to use the entire chain. To the extent that a truncated portion of the intracellular signaling domain is used, suchAttorney Docket No: 243734.000222 truncated portion may be used in place of the intact chain as long as it transduces the effector function signal. The term intracellular signaling domain is thus meant to include any truncated portion of the lymphocyte activation domain sufficient to transduce the effector function signal.

[0217] Non-limiting examples of lymphocyte activation domains which can be used in the CARs described herein include those derived from DAP 10, DAP 12, Fc epsilon receptor I y chain (FCER1G), CD35, CD3s, CD3y, CD3^, CD27, CD28, CD40, CD 134, CD 137, CD226, CD79A, ICOS. and MyD88.

[0218] In some embodiments, the lymphocyte activation domain is derived from CD3q and comprises the amino acid sequence SEQ ID NO: 25. In some embodiments, the CD3^ signaling domain comprises the amino acid sequence set forth in SEQ ID NO: 25 or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70. at least 75. at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 25. In some embodiments, the nucleotide sequence that encodes the CD3^ signaling domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 25, or a variant thereof having at least 50. at least 55. at least 60. at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91 , at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity7with SEQ ID NO: 25. In some embodiments, the nucleotide sequence that encodes the CD3^ signaling domain comprises the nucleotide sequence set forth in SEQ ID NO: 26. or a nucleotide sequence having at least 50. at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91 , at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 26. In some embodiments, the CD3^ signaling domain comprises the amino acid sequence set forth in SEQ ID NO: 25. In some embodiments, the nucleotide sequence that encodes the CD3^ signaling domain comprises the nucleotide sequence set forth in SEQ ID NO: 26. In some embodiments, the nucleotide sequence that encodes the CD3^ signaling domain comprises the nucleotide sequence set forth in SEQ ID NO: 44, or a nucleotide sequence having at least 50, at least 55. at least 60, at least 65, at least 70. at least 75, at least 80, at least 85, at least 90, at least 91, at least 92. at least 93. at least 94. at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 44. In some embodiments, the nucleotide sequence that encodes the CD3^ signaling domain comprises the nucleotide sequence set forth in SEQ ID NO: 88. In some embodiments, the nucleotide sequence that encodes the CD3q signaling domain comprises the nucleotide sequence set forth in SEQ ID NO: 88, or a nucleotide sequence having at least 50, at least 55,Attorney Docket No: 243734.000222 at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 88. In some embodiments, the nucleotide sequence that encodes the CD3^ signaling domain comprises the nucleotide sequence set forth in SEQ ID NO: 88.

[0219] In some embodiments, the cytoplasmic domain of the CAR comprises one or more co-stimulatory domains.

[0220] Non-limiting examples of co-stimulatory domains which can be used in the CARs of the present disclosure include, those derived from 4-1BB (CD137), CD28, CD40, ICOS, CD134 (OX-40). BTLA, CD27, CD30, GITR, CD226, CD79A, HVEM. MyD88, IL-2R , or the STAT3-binding YXXQ. In some embodiments, the CAR of the present disclosure comprises one co-stimulatory domain. In some embodiments, the CAR of the present disclosure comprises a co-stimulatory domain derived from CD28.

[0221] In some embodiments, the co-stimulatory domains which can be used in the CARs of the present disclosure may be derived from CD28, 4- IBB, CD27. CD40, CD 134, CD226, CD79A, ICOS. or MyD88, or any combination thereof.

[0222] In some embodiments, the CAR of the present disclosure comprises one or more co-stimulatory domains. In some embodiments, the CAR of the present disclosure comprises two or more co-stimulatory domains. In certain embodiments, the CAR of the present disclosure comprises two, three, four, five, six or more co-stimulatory domains. For example, the CAR of the present disclosure may comprise a co-stimulatory domain derived from 4-1 BB and a co-stimulatory domain derived from CD28.

[0223] In certain embodiments, the CARs of the present disclosure comprise a cytoplasmic domain, which comprises a signaling domain, a MyD88 polypeptide or functional fragment thereof, and a CD40 cytoplasmic polypeptide region or a functional fragment thereof. In certain embodiments, the CAR lacks the CD40 transmembrane and / or CD40 extracellular domains. In certain embodiments, the CAR includes the CD40 transmembrane domain. In certain embodiments, the CAR includes the CD40 transmembrane domain and a portion of the CD40 extracellular domain, wherein the CD40 extracellular domain does not interact with natural or synthetic ligands of CD40.

[0224] In certain embodiments, the signaling domain is separated from the MyD88 polypeptide or functional fragment thereof and / or the CD40 cytoplasmic polypeptide region or a functional fragment thereof. In certain embodiments, the lymphocyte activation domain is separated from the MyD88 polypeptide or functional fragment thereof and / or the CD40Attorney Docket No: 243734.000222 cytoplasmic polypeptide region or a functional fragment thereof by at least 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. 12. 13. 14, or 15 amino acids.

[0225] In some embodiments, the signaling domain(s) and co-stimulatory domain(s) can be in any order. In some embodiments, the signaling domain is upstream of the co-stimulatory domains. In some embodiments, the signaling domain is downstream from the co-stimulatory domains. In the cases where two or more co-stimulatory domains are included, the order of the co-stimulatory domains could be switched.

[0226] In some embodiments, the co-stimulatory domain is derived from CD28 and comprises the amino acid sequence SEQ ID NO: 33. In some embodiments, the CD28 co- stimulatory domain comprises the amino acid sequence set forth in SEQ ID NO: 33 or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70. at least 75. at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 33. In some embodiments, the nucleotide sequence that encodes the CD28 co-stimulatory domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 33, or a variant thereof having at least 50, at least 55, at least 60, at least 65. at least 70. at least 75. at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity7with SEQ ID NO: 33. In some embodiments, the nucleotide sequence that encodes the CD28 co-stimulatory domain comprises the nucleotide sequence set forth in SEQ ID NO: 34, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 34. In some embodiments, the nucleotide sequence that encodes the CD28 co-stimulatory domain comprises the nucleotide sequence set forth in SEQ ID NO: 85, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 85. In some embodiments, the CD28 co-stimulatory domain comprises the amino acid sequence set forth in SEQ ID NO: 33. In some embodiments, the nucleotide sequence that encodes the CD28 co-stimulatory domain comprises the nucleotide sequence set forth in SEQ ID NO: 34. In some embodiments, the nucleotide sequence that encodes the CD28 co-stimulatory domain comprises the nucleotide sequence set forth in SEQ ID NO: 85.Attorney Docket No: 243734.000222

[0227] In some embodiments, the co-stimulatory domain is derived from 4- IBB (CD 137) and comprises the amino acid sequence SEQ ID NO: 86. In some embodiments, the 4-1BB (CD137) co-stimulatory domain comprises the amino acid sequence set forth in SEQ ID NO: 86 or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 86. In some embodiments, the nucleotide sequence that encodes the 4-1BB (CD137) co-stimulatory domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 86, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 86. In some embodiments, the nucleotide sequence that encodes the 4-1BB (CD137) co- stimulatory domain comprises the nucleotide sequence set forth in SEQ ID NO: 87, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93. at least 94, at least 95, at least 96. at least 97. at least 98 or at least 99%. sequence identity with SEQ ID NO: 87. In some embodiments, the 4-1BB (CD137) co-stimulatory domain comprises the amino acid sequence set forth in SEQ ID NO: 86. In some embodiments, the nucleotide sequence that encodes the 4- IBB (CD 137) co-stimulatory domain comprises the nucleotide sequence set forth in SEQ ID NO: 87.

[0228] In some embodiments, the cytoplasmic domain comprises both the CD3^ lymphocyte activation domain and the CD28 co-stimulatory' domain, which are fused in frame. The CD3q lymphocyte activation domain and the CD28 co-stimulatory domain can be in any order. In some embodiments, the CD3q lymphocyte activation domain is downstream of the CD28 co-stimulatory domain.

[0229] Accessory Genes of the CAR

[0230] In addition to the CAR construct, the CAR may further comprise at least one additional gene that encodes an additional peptide. Examples of additional genes can include a transduced immune effector cell selection marker, an in vivo tracking marker, cellular marker, epitope tag, a cytokine, a suicide gene, safety switch, or some other functional gene. In certain embodiments, the functional additional gene can induce the expression of another molecule. In certain embodiments, the functional additional gene can increase the safety' of the CAR. For example, the CAR construct may comprise an additional gene which is truncated CD 19Attorney Docket No: 243734.000222(tCD19). The tCD19 can be used as a tag. Expression of tCD19 may also help determine transduction efficiency.

[0231] Other examples of additional genes include genes that encode polypeptides with a biological function; examples include, but are not limited to, cytokines, chimeric cytokine receptors, dominant negative receptors, safety7switches (CD20, truncated EGFR or HER2, inducible caspase 9 molecules). As another example, the CAR construct may comprise an additional gene which is a synNotch receptor. Once activated, the synNotch receptor can induce the expression of a target gene (e.g., a second CAR and / or bispecific molecule).

[0232] In some embodiments, the CAR may comprise one or more additional nucleotide sequences encoding one or more additional polypeptide sequences. As a non-limiting example, the one or more additional polypeptide sequences may be selected from one or more cellular markers, epitope tags, cytokines, safety7switches, dimerization moieties, or degradation moieties.

[0233] In certain embodiments, the CAR comprises at least one additional gene (i.e., a second gene). In certain embodiments, the CAR comprises one second gene. In other embodiments, the CAR comprises two additional genes (i.e., a third gene). In yet another embodiment, the CAR comprises three additional genes (i.e., a fourth gene). In certain embodiments, the additional genes are separated from each other and the CAR construct. For example, they may be separated by 2A sequences and / or an internal ribosomal entry sites (IRES). In certain examples, the CAR can be at any position of the polynucleotide chain (for example construct A: CAR, second gene, third gene, fourth gene; construct B: second gene, CAR, third gene, fourth gene; etc.).

[0234] Non-limiting examples of classes of accessory7genes that can be used to increase the effector function of CAR containing immune effector cells, include i) secretable cytokines (e.g., but not limited to, IL-7, IL-12, IL-15, IL-18), ii) membrane bound cytokines (e.g., but not limited to, IL-15), iii) chimeric cytokine receptors (e.g., but not limited to, IL-2 / IL-7, IL- 4 / IL-7), iv) constitutive active cytokine receptors (e.g., but not limited to, C7R), v) dominant negative receptors (DNR; e.g.. but not limited to TGFRII DNR), vi) ligands of co-stimulatory molecules (e.g., but not limited to, CD80, 4-1BBL), vii) antibodies, including fragments thereof and bispecific antibodies (e g., but not limited to, bispecific T-cell engagers (BiTEs)), or vii) a second CAR.

[0235] In some embodiments, the accessory gene included herein is a truncated CD19 molecule (tCD19). In some embodiments, the tCD19 molecule comprises the amino acid sequence set forth in SEQ ID NO: 47 or a variant thereof having at least 48, at least 55, at leastAttorney Docket No: 243734.00022260, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 47. In some embodiments, the nucleotide sequence that encodes the tCD19 molecule comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 47, or a variant thereof having at least 48, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80. at least 85, at least 90, at least 91, at least 92, at least 93, at least 94. at least 95. at least 96. at least 97. at least 98 or at least 99%. sequence identity with SEQ ID NO: 47. In some embodiments, the nucleotide sequence that encodes the tCD19 molecule comprises the nucleotide sequence set forth in SEQ ID NO: 48, or a nucleotide sequence having at least 48, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92. at least 93, at least 94, at least 95, at least 96, at least 97. at least 98 or at least 99%, sequence identity with SEQ ID NO: 48. In some embodiments, the tCD19 molecule comprises the amino acid sequence set forth in SEQ ID NO: 47. In some embodiments, the nucleotide sequence that encodes the tCD19 molecule comprises the nucleotide sequence set forth in SEQ ID NO: 48.

[0236] tCD19 may be separated from the CAR-encoding sequence by a separation sequence (e.g., a 2A sequence). tCD19 could also be replaced with two accessory genes separated by a separation sequence (e.g., a 2A sequence) using a combination of the classes of molecules listed above (e.g., CAR-2A-CD20-2A-IL15). In addition, the use of two separation sequences (e.g., 2A sequences) would allow the expression of TCR (e.g., CAR-2A-TCRa-2A- TCR|3). In the constructs with a CAR and two or three accessory genes, the order of the CAR and the 2nd or 3rd transgene could be switched.

[0237] In certain embodiments, the additional gene may be regulated by an NF AT dependent-promoter. Activation of the T-cell or other lymphocyte leads to activation of the transcription factor NF AT resulting in the induction of the expression of the protein encoded by the gene linked with the NF AT dependent promoter. One or more members of the NF AT family (i.e., NFATcl, NFATc2, NFATc3, NFATc4, and NFAT5) is expressed in most cells of the immune system. NFAT-dependent promoters and enhancers tend to have three to five NF AT binding sites.

[0238] In certain embodiments, the functional additional gene can be a suicide gene. A suicide gene is a recombinant gene that will cause the immune effector cell that the gene is expressed in, to undergo programmed cell death or antibody mediated clearance at a desired time. Suicide genes can function to increase the safety of the CAR. In another embodiment, the additional gene is an inducible suicide gene. Non-limiting examples of suicide genesAttorney Docket No: 243734.000222 include i) molecules that are expressed on the cell surface and can be targeted with a clinical grade monoclonal antibody including CD20. EGFR or a fragment thereof. HER2 or a fragment thereof, and ii) inducible suicide genes (e.g., but not limited to inducible caspase 9 (see Straathof et al. (2005) Blood. 105(11): 4247-4254; US Publ. No. 2011 / 0286980, each of which are incorporated herein by reference in their entirety for all purposes)).

[0239] In certain aspects, CARs of the present disclosure may be regulated by a safety switch. As used herein, the term ‘"safety switch” refers to any mechanism that is capable of removing or inhibiting the effect of a CAR from a system (e.g., a culture or a subject). Safety switches can function to increase the safety of the CAR.

[0240] The function of the safety switch may be inducible. Non-limiting examples of safety switches include (a) molecules that are expressed on the cell surface and can be targeted with a clinical grade monoclonal antibody including CD20, EGFR or a fragment thereof, HER2 or a fragment thereof, and (b) inducible suicide genes (e.g., but not limited to herpes simplex virus thymidine kinase (HSV-TK) and inducible caspase 9 (see Straathof et al. (2005) Blood. 105(11): 4247-4254; US Publ. No. 2011 / 0286980, each of which are incorporated herein by reference in their entirety for all purposes).

[0241] In some embodiments, the safety switch is a CD20 polypeptide. Expression of human CD20 on the cell surface presents an attractive strategy' for a safety' switch. The inventors and others have shown that cells that express CD20 can be rapidly eliminated with the FDA approved monoclonal antibody rituximab through complement-mediated cytotoxicity and antibody-dependent cell-mediated cytotoxicity (see e.g., Griffioen, M., et al. Haematologica 94, 1316-1320 (2009), which is incorporated herein by reference in its entirety for all purposes). Rituximab is an anti-CD20 monoclonal antibody that has been FDA approved for Chronic Lymphocytic Leukemia (CLL) and Non-Hodgkin's Lymphoma (NHL), among others (Storz, U. MAbs 6, 820-837 (2014), which is incorporated herein by reference in its entirety' for all purposes). The CD20 safety switch is non-immunogenic and can function as a reporter / selection marker in addition to a safety' switch (Bonifant, C.L., et al. Mol Ther 24, 1615-1626 (2016); van Loenen, M.M., et al. Gene Ther 20. 861-867 (2013); each of which is incorporated herein by reference in its entirety for all purposes).

[0242] In some embodiments, the polynucleotide sequence(s) encoding the CARs of the present disclosure may be expressed in an inducible fashion, for example, as may be achieved with an inducible promoter, an inducible expression system, an artificial signaling circuits, and / or drug-induced splicing.Attorney Docket No: 243734.000222

[0243] In some embodiments, the polynucleotide sequence(s) encoding the CARs of the present disclosure may be expressed in an inducible fashion, such as that which may be achieved with i) an inducible promoter, for example, but not limited to promotors that may be activated by T cell activation (e.g. NF AT, Nur66, IFNg) or hypoxia; ii) an inducible expression system, for example, but not limited to doxycycline- or tamoxifen- inducible expression system; iii) artificial signaling circuits including, but not limited to, SynNotch, and / or iv) drug- induced splicing.

[0244] In some embodiments, the polynucleotide sequence(s) encoding the CARs disclosed herein may be expressed as a ‘split molecule’ in which for example, transmembrane and intracellular signaling regions, or any other domains or regions of the CAR, may be assembled only in the presence of a heterodimerizing small molecule (e.g.. small organic molecule, nucleic acid, polypeptide, or a fragment, isoform, variant, analog, or derivative thereof).

[0245] In some embodiments, the polynucleotide sequence(s) encoding the CARs herein may further encode a moiety so that the stability of CAR may be regulated with a small molecule, including but not limited to. the “SWIFF” technology or an immunomodulatory drug (IMiD)-inducible degron.

[0246] A “separation sequence” refers to a peptide sequence that causes a ribosome to release the growing polypeptide chain that it is being synthesizes without dissociation from the mRNA. In this respect, the ribosome continues translating and therefore produces a second polypeptide. Non-limiting examples of separation sequences includes T2A (EGRGSLLTCGDVEENPGP (SEQ ID NO: 45) or GSGEGRGSLLTCGDVEENPGP (SEQ ID NO: 53)); the foot and mouth disease virus (FMDV) 2A sequence (GSGSRVTELLYRMKRAETYCPRPLLAIHPTEARHKQKIVAPVKQLLNFDLLKLAGD VESNPGP (SEQ ID NO : 54)); Sponge (Amphimedon queenslandica) 2A sequence (LLCFLLLLLSGDVELNPGP (SEQ ID NO: 55); or HHFMFLLLLLAGDIELNPGP (SEQ ID NO: 56)); acom worm (Saccoglossus kowalevskii) 2A sequence (WFLVLLSFILSGDIEVNPGP (SEQ ID NO: 57)); amphioxus (Branchiostoma floridae) 2A sequence (KNCAMYMLLLSGDVETNPGP (SEQ ID NO: 58); or MVISQLMLKLAGDVEENPGP (SEQ ID NO: 59)); porcine teschovirus-1 2A sequence (GSGATNFSLLKQAGDVEENPGP (SEQ ID NO: 60)); and equine rhinitis A virus 2A sequence (GSGQCTNYALLKLAGD VESNPGP (SEQ ID NO: 61)). In some embodiments, the separation sequence is a naturally occurring or synthetic sequence. In some embodiments,Attorney Docket No: 243734.000222 the separation sequence includes the 2A consensus sequence D-X-E-X-NPGP (SEQ ID NO: 62), in which X is any amino acid residue.

[0247] In some embodiments, the separation sequence comprises a Peptide 2A (P2A) sequences disclosed herein. In some embodiments, the P2A separation sequence domain comprises the amino acid sequence SEQ ID NO: 117. or a or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80. at least 85, at least 90, at least 91. at least 92. at least 93. at least 94. at least 95. at least 96. at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 117. In some embodiments, the nucleotide sequence encoding the P2A separation sequence domain comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 117, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80. at least 85. at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 117. In some embodiments, the nucleotide sequence encoding the P2A separation sequence domain comprises the sequence set forth in SEQ ID NO: 118, or a nucleotide sequence having at least 50, at least 55, at least 60, at least 65. at least 70, at least 75, at least 80, at least 85, at least 90, at least 91. at least 92. at least 93. at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99%, sequence identity with SEQ ID NO: 118. In some embodiments, the P2A separation sequence domain comprises the amino acid sequence of SEQ ID NO: 117. In some embodiments, the nucleotide sequence encoding the P2A separation sequence domain comprises the nucleotide sequence set forth in SEQ ID NO: 1 18.

[0248] Alternatively, an Internal Ribosome Entry Site (IRES) may be used to link the CAR and the additional gene. IRES is an RNA element that allows for translation initiation in a capindependent manner. IRES can link two coding sequences in one bicistronic vector and allow the translation of both proteins in cells.

[0249] In certain embodiments, the immune effector cells can be genetically modified to express not only CARs as disclosed herein but to also express fusion protein with signaling activity (e.g., costimulation. T-cell activation). These fusion proteins can improve immune effector cell activation and / or responsiveness. In certain embodiments, the fusion protein can enhance the immune effector cell’s response to the target antigen. In certain embodiments, the fusion protein can impart resistance to suppression signals.

[0250] In certain embodiments, fusion proteins can comprise portions of CD4, CD8a, CD28, portions of a T-cell receptor, or an antigen-binding moiety (e.g.. scFv) linked to a MyD88, CD40, and / or other signaling molecules.Attorney Docket No: 243734.000222

[0251] In certain embodiments, the fusion protein comprises an extracellular target-binding domain (as disclosed above), a transmembrane domain (as described above) and a cytoplasmic domain, wherein the cytoplasmic domain comprises at least one co-stimulatory protein (as described above). In certain embodiments, the co-stimulatory fusion protein does not comprise a lymphocyte activation domain (e.g., CD3Q. In certain embodiments, the at least one co- stimulatory protein can be a MyD88 polypeptide or functional fragment thereof, and / or a CD40 cytoplasmic polypeptide region or a functional fragment thereof.

[0252] In certain embodiments, the fusion protein comprises an extracellular domain (such as, but not limited to CD19, CD34), a transmembrane domain (as described above) and a cytoplasmic domain, wherein the cytoplasmic domain comprises at least one co-stimulatory protein (as described above). In certain embodiments, the fusion protein does not comprise a lymphocyte activation domain (e.g., CD3Q. In certain embodiments, the at least one portion of the fusion protein can be a MyD88 polypeptide or functional fragment thereof, and / or a CD40 cytoplasmic polypeptide region or a functional fragment thereof.

[0253] Non-limiting examples of fusion proteins include, but are not limited to, the constructs in the publication of WO2019222579 and WO2016073875, which are incorporated herein by reference in their entirety for all purposes.

[0254] In certain embodiments, the fusion proteins are introduced into the immune effector cells on a separate vector from the CAR. In certain embodiments, the fusion proteins are introduced into the immune effector cells on the same vector as the CAR. In certain embodiments, the fusion proteins are introduced into the immune effector cells on the same vector as the CAR but separated by a separation sequence such as 2A.

[0255] Non-Limiting Examples of CARs

[0256] In some embodiments, the CAR can be encoded by one polynucleotide chain.

[0257] In some embodiments, the CAR of the invention is encoded by a nucleotide sequence comprising the nucleotide sequence of SEQ ID NO: 106, 108, 110, 112, or 116, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90. at least 91, at least 92, at least 93, at least 94, at least 95, at least 96. at least 97. at least 98 or at least 99% sequence identity with SEQ ID NO: 106, 108. 110. 1 12, or 1 16. In some embodiments, the CAR comprises the amino acid sequence of SEQ ID NO: 105, 107, 109, 111, or 115, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95. at least 96, at least 97, at least 98 or at least 99% sequence identity with SEQ ID NO: 105, 107, 109, 111, or 115.Attorney Docket No: 243734.000222

[0258] In some embodiments, the CAR of the invention is encoded by a nucleotide sequence comprising the nucleotides sequence of SEQ ID NO: 4. 6, 10, 12, or 14, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99% sequence identity7with SEQ ID NO: 4, 6, 10, 12, or 14. In some embodiments, the CAR comprises the amino acid sequence of SEQ ID NO: 3, 5, 9, 11, or 13, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least95, at least 96, at least 97, at least 98 or at least 99% sequence identity with SEQ ID NO: 3, 5, 9, 11, or 13.

[0259] In some embodiments, the CAR of the invention is encoded by a nucleotide sequence comprising the nucleotides sequence of SEQ ID NO: 152, 154, 156, 158, or 160, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least96, at least 97, at least 98 or at least 99% sequence identity with SEQ ID NO: 152, 154, 156, 158, or 160. In some embodiments, the CAR comprises the amino acid sequence of SEQ ID NO: 151, 153, 155, 157, or 159, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99% sequence identity with SEQ ID NO: 151, 153. 155, 157. or 159.Methods for Generating Modified Immune Effector Cells

[0260] In one aspect, the present invention provides a method for generating a modified immune effector cell described herein. In a related aspect, the present invention provides a method of preserving developmental potential of an immune effector cell. Such methods may comprise modifying an MBD6 gene or gene product in the immune effector cell so that the expression and / or function of MBD6 in the immune effector cell is reduced or eliminated. As a non-limiting example, the immune effector cell may be any of the various T cells disclosed herein. In particular, the T cell may be selected from, e.g., T cell a CD8+ T cell, a CD4+ T cell, a cytotoxic T cell, an a[3 T cell receptor (TCR) T cell, a natural killer T (NKT) cell, a yb T cell, a memory T cell, a T-helper cell, and a regulatory T cell (Treg). In some embodiments, the immune effector cell may be an NK cell. In some embodiments, the above-described methods may comprise further modify ing the immune effector cell to express a CAR disclosed herein that is capable of binding to an antigen, e.g.. an antigen specific to tumor disclosed herein.Attorney Docket No: 243734.000222

[0261] The methods may further comprise modifying an MBD5 gene or gene product in the immune effector cell so that the expression and / or function of MBD5 in the immune effector cell is reduced or eliminated. The methods may further comprise modifying a BAP1 gene or gene product in the immune effector cell so that the expression and / or function of BAP 1 in the immune effector cell is reduced or eliminated. The methods may further comprise modifying a ASXL1 gene or gene product in the immune effector cell so that the expression and / or function of ASXL1 in the immune effector cell is reduced or eliminated. In some embodiments, the MBD6 gene, the MBD5 gene, the BAP1 gene and / or the ASXL1 gene may be deleted.

[0262] In some embodiments, the MBD6, MBD5, BAP1 and / or ASXL1 gene(s) or gene product(s) in the immune effector cell may be modified in the presence of one or more inhibitory signals or agents (e.g., compound, small molecule, e.g., small organic molecule, nucleic acid, polypeptide, or a fragment, isoform, variant, analog, or derivative thereof).

[0263] As used herein, “small molecule inhibitors’' include, but are not limited to, small peptides or peptide-like molecules, soluble peptides, and synthetic non-peptidyl organic or inorganic compounds. A small molecule inhibitor or antagonist can have a molecular weight of any of about 100 to about 20,000 Daltons (Da), about 500 to about 15,000 Da, about 1000 to about 10,000 Da. In some embodiments, the small molecule may be, for example, a peptide and / or a peptidomimetic. A peptidomimetic may include, e.g., chemically modified peptides and peptide-like molecules that contain non-naturally occurring amino acids, peptoids, and the like. Methods for identifying a peptidomimetics are well known in the art and may comprise the screening of databases that contain libraries of possible peptidomimetics.

[0264] In some embodiments, the MBD6, MBD5, BAP1 and / or ASXL1 gene(s) or gene product(s) may be targeted using any number of various agents (e.g., a small molecule inhibitor). In some embodiments, the agent may be used to reduce the expression and / or activity of MBD6, MBD5, BAP1 and / or ASXL1 in a modified immune effector cell disclosed herein.

[0265] In some embodiments, the MBD6 gene, MBD5 gene. BAP1 gene, and / or ASXL1 gene in the immune effector cell may be deleted or modified as a result of an activity of a sitespecific nuclease.

[0266] Site-specific nucleases may create double-strand breaks or single-strand breaks (i.e., nicks) in a genomic DNA of a cell. Although not wishing to be bound by theory', these breaks are typically repaired by the cell using one of two mechanisms: non-homologous end joining (NHEJ) and homology-directed repair (HDR). In NHEJ, the double-strand breaks areAttorney Docket No: 243734.000222 repaired by direct ligation of the break ends to one another. As a result, no new nucleic acid material is inserted into the site, although a few bases may be lost or added, resulting in a small insertions and deletion (indel). In HDR, a donor polynucleotide with homology to the cleaved target DNA sequence is used as a template to repair the cleaved target DNA sequence, resulting in the transfer of genetic information from the donor polynucleotide to the target DNA. As such, new nucleic acid material may be inserted or copied into the cleavage site. In some cases, an exogenous donor polynucleotide can be provided to the cell. The modifications of the target DNA due to NHEJ and / or HDR may lead to, for example, gene correction, gene replacement, gene tagging, transgene insertion, nucleotide deletion, gene disruption, gene mutation, sequence replacement, etc. Accordingly, cleavage of DNA by a site-directed nuclease may be used to delete nucleic acid material from a target DNA sequence by cleaving the target DNA sequence and allowing the cell to repair the sequence in the absence of an exogenously provided donor polynucleotide. Thus, the methods can be used to knock out a gene (resulting in complete lack of transcription or altered transcription) or to knock in genetic material (e.g., a transgene) into a locus of choice in the target DNA.

[0267] In some embodiments, the site-specific nuclease is an RNA-guided endonuclease. In particular, a group of RNA-guided endonucleases known as CRISPR-associated (Cas) proteins may be employed to genetically modify the immune effector cell. A Cas protein may form an RNA-protein complex (referred to as RNP) with a guide RNA (gRNA) and is capable of cleaving a target site bearing sequence complementarity to a short sequence (typically about 20-40nt) in the gRNA. In some embodiments, the RNA-guided endonuclease is a Cas9 protein, Cpfl (Cas 12a) protein, C2cl protein, C2c3 protein, or C2c2 protein.

[0268] In a specific embodiment, the RNA-guided endonuclease is a Cas9 protein. The Cas9 protein may be from S', pyogenes, Streptococcus thermophilus, Neisseria meningitidis, F. novicida, S. mutans or Treponema denticola. The Cas9 may be a native or modified Cas9 protein.

[0269] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD6 gene. In some embodiments, the gRNA targets a nucleotide sequence compnsing SEQ ID NO: 167. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 168. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence of SEQ ID NO: 168.

[0270] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD6 gene. In some embodiments, the gRNA targets aAttorney Docket No: 243734.000222 nucleotide sequence comprising SEQ ID NO: 173. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 174. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence of SEQ ID NO: 174.

[0271] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD6 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 182-SEQ ID NO: 184. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 186- SEQ ID NO: 188. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence of SEQ ID NO: 186- SEQ ID NO: 188.

[0272] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD5 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 169. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 170. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD5 comprising a nucleotide sequence of SEQ ID NO: 170.

[0273] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD5 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 171. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 172. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD5 comprising a nucleotide sequence of SEQ ID NO: 172.

[0274] The Cas9 protein may be programmed with a gRNA that targets a locus within or near the BAP1 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 175. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 176. In some aspects, the present invention provides a guide RNA (gRNA) targeting BAP1 comprising a nucleotide sequence of SEQ ID NO: 176.

[0275] The Cas9 protein may be programmed with a gRNA that targets a locus within or near the BAP1 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 177. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 178. In some aspects, the presentAttorney Docket No: 243734.000222 invention provides a guide RNA (gRNA) targeting BAP1 comprising a nucleotide sequence of SEQ ID NO: 178.

[0276] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the ASXL1 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 142. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 143. In some aspects, the present invention provides a guide RNA (gRNA) targeting ASXL1 comprising a nucleotide sequence of SEQ ID NO: 143.

[0277] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the ASXL1 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 161. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 162. In some aspects, the present invention provides a guide RNA (gRNA) targeting ASXL1 comprising a nucleotide sequence of SEQ ID NO: 162.

[0278] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the ASXL1 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 163. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 164. In some aspects, the present invention provides a guide RNA (gRNA) targeting ASXL1 comprising a nucleotide sequence of SEQ ID NO: 164.

[0279] In various embodiments, the MBD6 gene, the MBD5 gene, the BAP1 gene, and / or the ASXL1 gene is derived from a mammal. In some embodiments, the MBD6 gene, the MBD5 gene, the BAP1 gene, and / or the ASXL1 gene is derived from a mouse. In some embodiments, the MBD6 gene, the MBD5 gene, the BAP1 gene, and / or the ASXL1 gene is derived from a human.

[0280] In certain aspects, the present invention provides a ribonucleoprotein complex comprising a gRNA disclosed herein and a Cas9 protein.

[0281] In alternative embodiments, the site-specific nuclease used in the methods described herein is a zinc finger nuclease, a TALEN nuclease, or a mega-TALEN nuclease.

[0282] In some embodiments, the MBD6, MBD5, BAP1, and / or ASXL1 gene product in the immune effector cell is deleted or modified as a result of an activity of an RNA interference (RNAi) molecule or an antisense oligonucleotide. RNA interference (RNAi) refers to the process of sequence-specific post-transcriptional gene silencing in animals mediated by small interfering RNAs (siRNAs) (Fire et al., 1998, Nature, 391, 806; Hamilton et al., 1999, Science,Attorney Docket No: 243734.000222286, 950-951). Any small nucleic acid molecules capable of mediating RNAi, such as a short interfering nucleic acid (siNA). a small interfering RNA (siRNA), a double-stranded RNA (dsRNA), a micro-RNA (miRNA), and a short hairpin RNA (shRNA), may be to inhibit the expression of the MBD6, MBD5, BAP1, and / or ASXL1 gene. An antisense oligonucleotide (ASO) is a short nucleotide sequence that can hybridize or bind (e.g., by Watson-Crick base pairing) in a complementary fashion to its target sequence.

[0283] In some embodiments, the RNAi molecule is a small interfering RNA (siRNA) or a small hairpin RNA (shRNA). siRNAs, also known as short interfering RNA or silencing RNA, are a class of double-stranded RNA molecules, 20-25 base pairs in length, and operating within the RNA interference (RNAi) pathway. shRNAs or short hairpin RNAs are a group of artificial RNA molecules with a tight hairpin turn that can be used to silence target gene expression via RNA interference (RNAi).

[0284] In various embodiments, the site-specific nuclease, the RNAi molecule or the antisense oligonucleotide as described above is introduced into the immune effector cell via a viral vector, a non-viral vector or a physical means.

[0285] The methods for generating a modified immune effector cell described herein may further include activating the STAT5 signaling pathway in the immune effector cell by a signaling molecule. In some embodiments, the signaling molecule is a common gamma chain cytokine. Non-limiting examples of cytokines that may be used in the methods described herein include IL-15, IL-7, IL-2, IL-4, IL-9, and IL-21.

[0286] In some embodiments, the STAT5 signaling pathway is activated by modifying the immune effector cell to express a constitutively active cytokine receptor or a switch receptor. Such constitutively active cytokine receptor may be a constitutively active IL7 receptor (C7R). Such switch receptor may be an IL-4 / IL-7 receptor or an IL-4 / IL-2 receptor.

[0287] In some embodiments, the immune effector cell is contacted with an effective amount of the signaling molecule or a carrier containing the signaling molecule. Suitable carriers include, but are not limited to, polymers, micelles, reverse micelles, liposomes, emulsions, hydrogels, microparticles, nanoparticles, and microspheres. In some embodiments, the earner is a nanoparticle.

[0288] In some embodiments, the immune effector cell is contacted with the signaling molecule more than once. The immune effector cell may be contacted with the signaling molecule 2 times, 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, or more than 8 times. The immune effector cell may be contacted with the signaling molecule at a frequency of every 8 hours, every 12 hours, every 16 hours, every 24 hours, every 2 days, every’ 3 days, every 4Attorney Docket No: 243734.000222 days, every 5 days, every 6 days, every 7 days, every' 8 days, every' 8 days, every' 10 days, once a week, twice a week, biweekly’, once a month, twice a month. 3 times a month, 4 times a month, or 5 times a month.

[0289] In some embodiments, the signaling molecule is expressed in the immune effector cell. The signaling molecule may be expressed from a transgene introduced into the immune effector cell. The signaling molecule-expressing transgene may be introduced into the immune effector cell using a viral vector, a non- viral vector, or a physical means. In some embodiments, the modified immune effector cell is further engineered to express a chimeric antigen receptor (CAR) as described herein. The CAR may comprise an extracellular antigen-binding domain, a transmembrane domain, and / or a cytoplasmic domain as described above. The CAR may be expressed from a transgene introduced into the immune effector cell. The CAR-expressing transgene may be introduced into the immune effector cell using a viral vector, a non-viral vector or a physical means. Non-limiting examples viral vectors include a retroviral vector, an adenoviral vector, an adeno-associated viral (AAV) vector, a herpes viral vector, or a baculoviral vector. In some embodiments, the retroviral vector is a lentiviral vector. In some embodiments, the non-viral vector is a transposon. In some embodiments, the transposon is a sleeping beauty' transposon or PiggyBac transposon.

[0290] Physical means by which the CAR-expressing transgene may be introduced into the immune effector cells include, but are not limited to, electroporation, microinjection, magnetofection, ultrasound, a ballistic or hydrodynamic method, or a combination thereof.

[0291] In some embodiments, the immune effector cells are T cells.

[0292] In some embodiments, the immune effector cells are NK cells.

[0293] In some embodiments, the immune effector cells are stem cells that are capable of differentiating into immune cells, including induced pluripotent stem cells (iPSCs).

[0294] Modified immune effector cells can be activated and / or expanded ex vivo for use in adoptive cellular immunotherapy in which infusions of such cells have been shown to have anti-disease reactivity in a disease-bearing subject. The compositions and methods of this invention can be used to generate a population of immune effector cells (e.g, T lymphocytes or natural killer cells) with enhanced immune cell function for use in immunotherapy in the treatment of the disease.

[0295] Isolation / Enrichment

[0296] The immune effector cells may be autologous / autogeneic (“self’) or non- autologous (“non-self,” e.g.. allogeneic, syngeneic or xenogeneic). In some embodiments, the immune effector cells are obtained from a mammalian subject. In other embodiments, theAttorney Docket No: 243734.000222 immune effector cells are obtained from a primate subject. In some embodiments, the immune effector cells are obtained from a human subject.

[0297] In some embodiments, the immune effector cells can be lymphocytes. Lymphocytes can be obtained from sources such as, but not limited to, peripheral blood mononuclear cells, bone marrow, lymph nodes tissue, cord blood, thymus issue, tissue from a site of infection, ascites, pleural effusion, spleen tissue, and tumors. Lymphocytes may also be generated by differentiation of stem cells. In some embodiments, lymphocytes can be obtained from blood collected from a subject using techniques generally known to the skilled person, such as sedimentation, e.g., FICOLL™ separation.

[0298] In some embodiments, cells from the circulating blood of a subject are obtained by apheresis. An apheresis device typically contains lymphocytes, including T cells, monocytes, granulocytes, B cells, other nucleated white blood cells, red blood cells, and platelets. In some embodiments, the cells collected by apheresis may be washed to remove the plasma fraction and to place the cells in an appropriate buffer or media for subsequent processing. The cells can be washed with PBS or with another suitable solution that lacks calcium, magnesium, and most, if not all other, divalent cations. A washing step may be accomplished by methods known to those in the art, such as, but not limited to, using a semiautomated flowthrough centrifuge (e.g., Cobe 2991 cell processor, or the Baxter CytoMate). After washing, the cells may be resuspended in a variety of biocompatible buffers, cell culture medias, or other saline solution with or without buffer.

[0299] In some embodiments, immune effector cells can be isolated from a subject (e g., a donor). In some embodiments, the immune effector cell may be isolated from a subject having a disease. The disease may be, for example, a cancer, an infectious disease, an inflammatory disorder, or an autoimmune disease. As a non-limiting example, the cancer may be a cancer expressing B7-H3. In certain embodiments, the cancer may be a cancer expressing, e.g., HER2, IL13Ra2, and / or EphA2. In some embodiments, the cancer may be a cancer expressing, e.g., CD19, CD22, CD123, and / or CD33.

[0300] In some embodiments, the cancer is a HER2-positive breast cancer.

[0301] In some embodiments, the cancer is BCMA positive multiple myeloma.

[0302] In some embodiments, the cancer is CD19 and / or CD22 positive B-cell acute lymphoblastic leukemia.

[0303] In some embodiments, the cancer is an IL13Ra2-positive glioblastoma.

[0304] In some embodiments, the infectious disease may be caused by a virus. As a nonlimiting example, the virus may be a virus expressing gpl20.Attorney Docket No: 243734.000222

[0305] In some embodiments, the infectious disease is caused by a human immunodeficiency virus.

[0306] In some embodiments, the autoimmune disease is Lupus.

[0307] In some embodiments, immune effector cells disclosed herein may be derived from a blood, marrow, tissue, or a tumor sample.

[0308] In some embodiments, immune effector cells can be isolated from peripheral blood mononuclear cells (PBMCs) by lysing the red blood cells and depleting the monocytes. As an example, the cells can be sorted by centrifugation through a PERCOLL™ gradient. In some embodiments, after isolation of PBMCs, both cytotoxic and helper T lymphocytes can be sorted into naive, memory, and effector T cell subpopulations either before or after activation, expansion, and / or genetic modification.

[0309] In some embodiments, T lymphocytes can be enriched. For example, a specific subpopulation of T lymphocytes expressing one or more markers such as, but not limited to, CD3, CD4, CD8, CD14, CD15, CD16, CD19, CD27, CD28, CD34, CD36, CD45RA, CD45RO, CD56, CD62, CD62L, CD122, CD123, CD127, CD235a, CCR7, HLA-DR, or a combination thereof, can be enriched using either positive or negative selection techniques. In some embodiments, the T lymphocytes for use in the compositions of the invention do not express or do not substantially express one or more of the following markers: CD57, CD244, CD160, PD-1, CTLA4, TIM3, and LAG3.

[0310] In some embodiments, NK cells can be enriched. For example, a specific subpopulation of T lymphocytes expressing one or more markers such as, but not limited to, CD2, CD16, CD56, CD57, CD94, CD122, or a combination thereof, can be enriched using either positive or negative selection techniques.

[0311] Stimulation / Activation

[0312] In order to reach sufficient therapeutic doses of immune effector cell compositions, immune effector cells are often subjected to one or more rounds of stimulation / activation. In some embodiments, a method of producing immune effector cells for administration to a subject comprises stimulating the immune effector cells to become activated in the presence of one or more stimulatory signals or agents (e.g., compound, small molecule, e.g., small organic molecule, nucleic acid, polypeptide, or a fragment, isoform, variant, analog, or derivative thereof). In some embodiments, a method of producing immune effector cells for administration to a subject comprises stimulating the immune effector cells to become activated and to proliferate in the presence of one or more stimulatory signals or agents.Attorney Docket No: 243734.000222

[0313] Immune effector cells (e.g., T lymphocytes and NK cells) can be activated by inducing a change in their biologic state by which the cells express activation markers, produce cytokines, proliferate and / or become cytotoxic to target cells. All these changes can be produced by primary stimulatory signals. Co-stimulatory signals amplify the magnitude of the primary signals and suppress cell death following initial stimulation resulting in a more durable activation state and thus a higher cytotoxic capacity.

[0314] T cells can be activated generally using methods as described, for example, in U.S. Patents 6,352,694; 6,534,055; 6,905,680; 6,692,964; 5,858,358; 6,887,466; 6,905,681; 7,144,575; 7,067,318; 7,172,869; 7,232,566; 7,175,843; 5,883,223; 6,905,874; 6,797,514; and 6,867,041, each of which is incorporated herein by reference in its entirety.

[0315] In some embodiments, the T cell based immune effector cells can be activated by binding to an agent that activates CD3 .

[0316] In other embodiments, a CD2-binding agent may be used to provide a primary stimulation signal to the T cells. For example, and not by limitation, CD2 agents include, but are not limited to, CD2 ligands and anti-CD2 antibodies, e.g., the T1 1.3 antibody in combination with the T1 1.1 or T1 1.2 antibody (Meuer, S. C. et al. (1984) Cell 36:897-906) and the 9.6 antibody (which recognizes the same epitope as TI 1.1) in combination with the 9-1 antibody (Yang, S. Y. et al. (1986) J. Immunol. 137: 1097-1100, which is incorporated herein by reference in its entirety ). Other antibodies which bind to the same epitopes as any of the above-described antibodies can also be used.

[0317] In some embodiments, the immune effector cells are activated by administering phorbol myristate acetate (PMA) and ionomycine. In some embodiments, the immune effector cells are activated by administering an appropriate antigen that induces activation and then expansion. In some embodiments, PMA, ionomycin, and / or appropriate antigen are administered with CD3 induce activation and / or expansion.

[0318] In general, the activating agents used in the present invention include, but are not limited to, an antibody, a fragment thereof and a proteinaceous binding molecule with antibody-like functions. Examples of (recombinant) antibody fragments are Fab fragments, Fv fragments, single-chain Fv fragments (scFv), a divalent antibody fragment such as an (Fab)2'- fragment, diabodies, triabodies (Iliades, P., et al., FEBS Lett (1997) 409, 437-441, which is incorporated herein by reference in its entirety), decabodies (Stone, E., et al., Journal of Immunological Methods (2007) 318, 88-94, which is incorporated herein by reference in its entirety) and other domain antibodies (Holt, L. J., et al.. Trends Biotechnol. (2003), 21, 11, 484-490, which is incorporated herein by reference in its entirety). The divalent antibodyAttorney Docket No: 243734.000222 fragment may be an (Fab)2'-fragment, or a divalent single-chain Fv fragment while the monovalent antibody fragment may be selected from a Fab fragment, a Fv fragment, and a single-chain Fv fragment (scFv).

[0319] In some embodiments, one or more binding sites of the CD3^ agents may be a bivalent proteinaceous artificial binding molecule such as a dimeric lipocalin mutein (i.e., duocalin). In some embodiments the receptor binding reagent may have a single second binding site (i.e.. monovalent). Examples of monovalent agents include, but are not limited to, a monovalent antibody fragment, a proteinaceous binding molecule with antibody-like binding properties or an MHC molecule. Examples of monovalent antibody fragments include, but are not limited to, a Fab fragment, a Fv fragment, and a single-chain Fv fragment (scFv), including a divalent single-chain Fv fragment.

[0320] The agent that specifically binds CD3 includes, but is not limited to, an anti-CD3- antibody, a divalent antibody fragment of an anti-CD3 antibody, a monovalent antibody fragment of an anti-CD3-antibody, and a proteinaceous CD3-binding molecule with antibodylike binding properties. A proteinaceous CD3-binding molecule with antibody-like binding properties can be an aptamer, a mutein based on a polypeptide of the lipocalin family, a glubody, a protein based on the ankyrin scaffold, a protein based on the crystalline scaffold, an adnectin, and an avimer. It also can be coupled to a bead.

[0321] In some embodiments, the activating agent (e.g., CD3-binding agent) can be present in a concentration of about 0. 1 to about 10 pg / ml. In some embodiments, the activating agent (e.g., CD3-binding agent) can be present in a concentration of about 0.2 pg / ml to about 9 pg / ml, about 0.3 pg / ml to about 8 pg / ml, about 0.4 pg / ml to about 7 pg / ml, about 0.5 pg / ml to about 6 pg / ml, about 0.6 pg / ml to about 5 pg / ml, about 0.7 pg / ml to about 4 pg / ml, about 0.8 pg / ml to about 3 pg / ml, or about 0.9 pg / ml to about 2 pg / ml. In some embodiments, the activating agent (e.g., CD3-binding agent) is administered at a concentration of about 0.1 pg / ml, about 0.2 pg / ml, about 0.3 pg / ml, about 0.4 pg / ml, about 0.5 pg / ml, about 0.6 pg / ml, about 0.7 pg / ml, about 0.8 pM, about 0.9 pg / ml, about 1 pg / ml, about 2 pg / ml, about 3 pg / ml, about 4 pM, about 5 pg / ml, about 6 pg / ml, about 7 pg / ml, about 8 pg / ml, about 9 pg / ml. or about 10 pg / ml. In some embodiments, the activating agent (e.g., CD3-binding agent) can be present in a concentration of 1 pg / ml.

[0322] NK cells can be activated generally using methods as described, for example, in U.S. Patents 7,803,376, 6,949,520, 6,693,086, 8,834,900, 9,404,083, 9,464,274, 7,435,596, 8,026,097, and 8.877,182; U.S. Patent Applications US2004 / 0058445, US2007 / 0160578,Atorney Docket No: 243734.000222US2013 / 0011376, US2015 / 0118207, and US2015 / 0037887; and PCT Patent Application WO2016 / 122147, each of which is incorporated herein by reference in its entirety.

[0323] In some embodiments, the NK based immune effector cells can be activated by, for example and not limitation, inhibition of inhibitory receptors on NK cells (e.g., KIR2DL1, KIR2DL2 / 3, KIR2DL4, KIR2DL5A, KIR2DL5B, KIR3DL1, KIR3DL2, KIR3DL3, LILRB1, NKG2A, NKG2C, NKG2E or LILRB5 receptor).

[0324] In some embodiments, the NK based immune effector cells can be activated by. for example and not limitation, feeder cells (e g., native K562 cells or K562 cells that are genetically modified to express 4-1 BBL and cytokines such as IL 15 or IL21).

[0325] In other embodiments, interferons or macrophage-derived cytokines can be used to activate NK cells. For example and not limitation, such interferons include, but are not limited to, interferon alpha and interferon gamma, and such cytokines include but are not limited to IL- 15, IL-2, IL-21.

[0326] In some embodiments, the NK activating agent can be present in a concentration of about 0. 1 to about 10 pg / ml. In some embodiments, the NK activating agent can be present in a concentration of about 0.2 pg / ml to about 9 pg / ml, about 0.3 pg / ml to about 8 pg / ml, about 0.4 pg / ml to about 7 pg / ml, about 0.5 pg / ml to about 6 pg / ml, about 0.6 pg / ml to about 5 pg / ml, about 0.7 pg / ml to about 4 pg / ml, about 0.8 pg / ml to about 3 pg / ml, or about 0.9 pg / ml to about 2 pg / ml. In some embodiments, the NK activating agent is administered at a concentration of about 0. 1 pg / ml, about 0.2 pg / ml, about 0.3 pg / ml, about 0.4 pg / ml. about 0.5 pg / ml, about 0.6 pg / ml, about 0.7 pg / ml, about 0.8 pM, about 0.9 pg / ml, about 1 pg / ml, about 2 pg / ml, about 3 pg / ml, about 4 pM, about 5 pg / ml, about 6 pg / ml, about 7 pg / ml, about 8 pg / ml, about 9 pg / ml, or about 10 pg / ml. In some embodiments, the NK activating agent can be present in a concentration of 1 pg / ml.

[0327] In some embodiments, the activating agent is attached to a solid support such as, but not limited to, a bead, an absorbent polymer present in culture plate or well or other matrices such as, but not limited to, Sepharose or glass; or may be expressed (such as in native or recombinant forms) on cell surface of natural or recombinant cell line by means known to those skilled in the art.

[0328] Polynucleotide and / or Polypeptide Transfer

[0329] In some embodiments, the immune effector cells are genetically modified by introducing polynucleotides and / or polypeptide (e.g., a CAR, a signaling molecule, a sitespecific nuclease, an RNAi molecule or an antisense oligonucleotide, or polynucleotides encoding the same). The immune effector cells can be genetically modified afterAttorney Docket No: 243734.000222 stimulation / activation. In some embodiments, the immune effector cells are modified within 12 hours, 16 hours. 24 hours, 36 hours, or 48 hours of stimulation / activation. In some embodiments, the cells are modified within 16 to 24 hours after stimulation / activation. In some embodiments, the immune effector cells are modified within 24 hours.

[0330] In order to genetically modify the immune effector cell, the polynucleotides and / or polypeptide (e.g., a CAR, a signaling molecule, a site-specific nuclease, an RNAi molecule or an antisense oligonucleotide, or polynucleotides encoding the same) must be transferred into the cell. Polynucleotide and / or polypeptide transfer may be via viral, non-viral gene delivery methods, or a physical method. Suitable methods for polynucleotide and / or polypeptide delivery' for use with the current methods include any method known by those of skill in the art by which a polynucleotide and / or polypeptide can be introduced into an organelle, cell, tissue or organism.

[0331] In various embodiments, polypeptides or polynucleotides (e.g., a CAR, a signaling molecule, a site-specific nuclease, an RNAi molecule or an antisense oligonucleotide, or polynucleotides encoding the same) described in the present invention are introduced to the immune effector cell via a recombinant vector.

[0332] In some embodiments, the recombinant vector encoding a CAR described above comprises the nucleotide sequence of SEQ ID NO: 4, 6, 10, 12, or 14, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70. at least 75, at least 80, at least 85. at least 90, at least 91, at least 92, at least 93, at least 94, at least 95. at least 96. at least 97, at least 98 or at least 99% sequence identity with SEQ ID NO: 4, 6, 10, 12, or 14. In some embodiments, the recombinant vector comprises the nucleotide sequence that encodes the amino acid sequence of SEQ ID NO: 3, 5. 9, 11, or 13, or a variant thereof having at least 50, at least 55, at least 60, at least 65, at least 70, at least 75, at least 80, at least 85, at least 90, at least 91, at least 92, at least 93, at least 94, at least 95, at least 96, at least 97, at least 98 or at least 99% sequence identity with SEQ ID NO: 3, 5, 9, 11, or 13.

[0333] In some embodiments, the vector is a viral vector. Suitable viral vectors that can be used in the present invention include, but are not limited to, a retroviral vector, an adenoviral vector, an adeno-associated viral (AAV) vector, a herpes viral vector, or a baculoviral vector. In one specific embodiment, the viral vector is a lentiviral vector.

[0334] In some embodiments, the immune effector cells can be transduced via retroviral transduction. References describing retroviral transduction of genes are Anderson et al.. U.S. Pat. No. 5.399,346; Mann et al., Cell 33: 153 (1983); Temin et al., U.S. Pat. No. 4,650,764; Temin et al., U.S. Pat. No. 4,980,289; Markowitz et al., J. Virol. 62: 1120 (1988); Temin et al.,Attorney Docket No: 243734.000222U.S. Pat. No. 5,124,263; International Patent Publication No. WO 95 / 07358, published Mar. 16, 1995, by Dougherty et al.; and Kuo et al., Blood 82:845 (1993), each of which is incorporated herein by reference in its entirety.

[0335] One method of genetic modification includes ex vivo modification. Various methods are available for transfecting cells and tissues removed from a subject via ex vivo modification. For example, retroviral gene transfer in vitro can be used to genetically modified cells removed from the subject and the cell transferred back into the subject. See e.g., Wilson et al.. Science, 244: 1344-1346, 1989 and Nabel et al., Science, 244(4910): 1342-1344, 1989, both of which are incorporated herein by reference in their entity. In some embodiments, the immune effector cells may be removed from the subject and transfected ex vivo using the polynucleotides (e.g., expression vectors) of the invention. In some embodiments, the immune effector cells obtained from the subject can be transfected or transduced with the polynucleotides (e.g., expression vectors) of the invention and then administered back to the subject.

[0336] In some embodiments, polynucleotides and / or polypeptides are transferred to the immune effector cell in a non-viral vector. In some embodiments, the non-viral vector is a transposon. Exemplary' transposons hat can be used in the present invention include, but are not limited to, a sleeping beauty' transposon and a PiggyBac transposon.

[0337] Nucleic acid vaccines may also be used to transfer polynucleotides into the immune effector cells. Such vaccines include, but are not limited to non-viral polynucleotide vectors, “naked’’ DNA and RNA, and viral vectors. Methods of genetically modifying cells with these vaccines, and for optimizing the expression of genes included in these vaccines are know n to those of skill in the art.

[0338] In some embodiments, the polynucleotide(s) is operatively linked to at least one regulatory element for expression of the gene product (e.g., a CAR, a signaling molecule, a site-specific nuclease, an RNAi molecule). The regulatory element can be capable of mediating expression of the gene product in the host cell (e.g., modified immune effector cell). Regulatory elements include, but are not limited to, promoters, enhancers, initiation sites, polyadenylation (polyA) tails, IRES elements, response elements, and termination signals. In some embodiments, the regulatory element regulates expression of the gene product. In some embodiments, the regulatory' element increases the expression of the gene product. In some embodiments, the regulatory' element increases the expression of the gene product once the host cell (e.g., modified immune effector cell) is activated. In some embodiments, the regulatory element decreases expression of the gene product. In some embodiments, theAttorney Docket No: 243734.000222 regulatory' element decreases expression of the gene product once the host cell (e.g., modified immune effector cell) is activated.

[0339] In various embodiment, polypeptides or polynucleotides (e.g., a CAR, a signaling molecule, a site-specific nuclease, an RNAi molecule or an antisense oligonucleotide, or polynucleotides encoding the same) are introduced into the modified immune effector cell using a physical means. Suitable physical means include, but are not limited to, electroporation, microinjection, magnetofection, ultrasound, a ballistic or hy drodynamic method, or a combination thereof.

[0340] Electroporation is a method for polynucleotide and / or polypeptide delivery'. See e.g., Potter et al., ( 1984) Proc. Nat'lAcad. Sci. USA, 81, 7161-7165 and Tur-Kaspaet al.. (1986) Mol. Cell Biol., 6. 716-718, both of which are incorporated herein in their entirety for all purposes. Electroporation involves the exposure of a suspension of cells and DNA to a high- voltage electric discharge. In some embodiments, cell wall-degrading enzymes, such as pectindegrading enzymes, can be employed to render the immune effector cells more susceptible to genetic modification by electroporation than untreated cells. See e.g.. U.S. Pat. No. 5,384,253, incorporated herein by reference in its entirety for all purposes.

[0341] In vivo electroporation involves a basic injection technique in which a vector is injected intradermally in a subject. Electrodes then apply electrical pulses to the intradermal site causing the cells localized there (e.g., resident dermal dendritic cells) to take up the vector. These tumor antigen-expressing dendritic cells activated by local inflammation can then migrate to lymph nodes.

[0342] Methods of electroporation for use with this invention include, for example, Sardesai, N. Y., and Weiner, D. B., Current Opinion in Immunotherapy 23:421-9 (2011) and Ferraro, B. et al., Human Vaccines 7: 120-127 (2011), both of which are hereby incorporated by reference herein in their entirety for all purposes.

[0343] Another method for polynucleotide and / or polypeptide transfer includes injection. In some embodiments, a polypeptide, a polynucleotide or a viral vector may be delivered to a cell, tissue, or organism via one or more injections (e.g., a needle injection). Non-limiting methods of injection include injection of a composition (e.g., a saline-based composition). Polynucleotides and / or polynucleotides can also be introduced by direct microinjection. Nonlimiting sites of injection include, subcutaneous, intradermal, intramuscular, intranodal (allows for direct delivery of antigen to lymphoid tissues), intravenous, intraprostatic, intratumor, intralymphatic (allows direct administration of DCs) and intraperitoneal. It is understood thatAttomey Docket No: 243734.000222 proper site of injection preparation is necessary' (e.g., shaving of the site of injection to observe proper needle placement).

[0344] Additional methods of polynucleotide and / or polypeptide transfer include liposome-mediated transfection (e.g., polynucleotide entrapped in a lipid complex suspended in an excess of aqueous solution. See e.g., Ghosh and Bachhawat, (1991) In: Liver Diseases, Targeted Diagnosis and Therapy Using Specific Receptors and Ligands, pp. 87-104). Also contemplated is a polynucleotide and / or polypeptide complexed with Lipofectamine. or Superfect); DEAE-dextran (e g., a polynucleotide is delivered into a cell using DEAE-dextran followed by polyethylene glycol. See e.g., Gopal, T. N., Mol Cell Biol. 1985 May; 5(5): 1188- 90); calcium phosphate (e.g.. polynucleotide is introduced to the cells using calcium phosphate precipitation. See e.g., Graham and van der Eb, (1973) Virology, 52. 456-467; Chen and Okayama, Mol. Cell Biol., 7(8):2745-2752, 1987), and Rippe et al., Mol. Cell Biol., 10:689- 695, 1990); sonication loading (introduction of a polynucleotide by direct sonic loading. See e.g., Fechheimer et al., (1987) Proc. Nat'l Acad. Sci. USA, 84, 8463-8467); microprojectile bombardment (e.g., one or more particles may be coated with at least one polynucleotide and / or polypeptide and delivered into cells by a propelling force. See e.g., U.S. Pat. No. 5,550,318; U.S. Pat. No. 5,538,880; U.S. Pat. No. 5,610,042; and PCT Application WO 94 / 09699; Klein et al., (1987) Nature, 327, 70-73, Yang et al., (1990) Proc. Nat’l Acad. Sci. USA, 87, 9568- 9572); and receptor-mediated transfection (e.g., selective uptake of macromolecules by receptor-mediated endocytosis that will be occurring in a target cell using cell type-specific distribution of various receptors. See e.g, Wu and Wu, (1987) J. Biol. Chem., 262, 4429-4432; Wagner et al., Proc. Natl. Acad. Sci. USA, 87(9):3410-3414, 1990; Perales et al., Proc. Natl. Acad. Sci. USA, 91:4086-4090, 1994; Myers, EPO 0273085; Wu and Wu, Adv. Drug Delivery Rev., 12: 159-167, 1993; Nicolau et al.. (1987) Methods Enzymol., 149. 157-176), each reference cited here is incorporated by reference in their entirety for all purposes.

[0345] In further embodiments, host cells (e.g., modified immune effector cells) are genetically modified using gene editing with homology-directed repair (HDR). Homology- directed repair (HDR) is a mechanism used by cells to repair double strand DNA breaks. In HDR, a donor polynucleotide with homology to the site of the double strand DNA break is used as a template to repair the cleaved DNA sequence, resulting in the transfer of genetic information from the donor polynucleotide to the DNA. As such, new nucleic acid material may be inserted or copied into a target DNA cleavage site. Double strand DNA breaks in host cells may be induced by a site-specific nuclease. Suitable site-specific nucleases for use in the present disclosure include, but are not limited to, RNA-guided endonuclease (e.g., CRISPR-Attorney Docket No: 243734.000222 associated (Cas) proteins), zinc finger nuclease, a TALEN nuclease, or mega-TALEN nuclease. For example, a site-specific nuclease (e.g., a Cas9 + guide RNA) capable of inducing a double strand break in a target DNA sequence is introduced to a host cell, along with a donor polynucleotide encoding a CAR of the present disclosure and optionally an additional protein (e.g., tCD19).

[0346] Expansion / Proliferation

[0347] After the immune effector cells are activated and transduced, the cells are cultured to proliferate. T cells may be cultured for at least 1, 2, 3, 4, 5, 6, or 7 days, at least 2 weeks, at least 1, 2, 3, 4, 5, or 6 months or more with 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 or more rounds of expansion.

[0348] Agents that can be used for the expansion of T cells can include interleukins, such as IL-2, IL-7, IL-15, or IL-21 (see for example Cornish et al. 2006, Blood. 108(2):600-8, Bazdar and Sieg, 2007, Journal of Virology7, 2007, 81(22): 12670-12674, Battalia et al, 2013, Immunology, 139(1): 109-120, each of which is incorporated by reference in their entirety for all purposes). Other illustrative examples for agents that may be used for the expansion of T cells are agents that bind to CD8, CD45 or CD90, such as aCD8, aCD45 or aCD90 antibodies. Illustrative examples of T cell populations include antigen-specific T cells, T helper cells, cytotoxic T cells, memory7T cell (an illustrative example of memory7T cells are CD62L+CD8+ specific central memory T cells) or regulatory T cells (an illustrative example of Treg are CD4+CD25+CD45RA+ Treg cells).

[0349] Additional agents that can be used to expand T lymphocytes includes methods as described, for example, in U.S. Patents 6,352,694; 6,534,055; 6,905,680; 6,692,964; 5,858,358; 6,887,466; 6,905,681; 7,144,575; 7,067,318; 7,172,869; 7,232,566; 7,175,843; 5,883,223; 6,905,874; 6.797,514; and 6,867,041, each of which is incorporated herein by reference in its entirety.

[0350] In some embodiments, the agent(s) used for expansion (e.g., IL-7, IL- 15) are administered at about 20 units / ml to about 200 units / ml. In some embodiments, the agent(s) used for expansion (e.g., IL-7, IL-15) are administered at about 25 units / ml to about 190 units / ml. about 30 units / ml to about 180 units / ml, about 35 units / ml to about 170 units / ml. about 40 units / ml to about 160 units / ml, about 45 units / ml to about 150 units / ml, about 50 units / ml to about 140 units / ml, about 55 units / ml to about 130 units / ml, about 60 units / ml to about 120 units / ml, about 65 units / ml to about 110 units / ml. about 70 units / ml to about 100 units / ml, about 75 units / ml to about 95 units / ml, or about 80 units / ml to about 90 units / ml. In some embodiments, the agent(s) used for expansion (e.g., IL-7, IL-15) are administered atAttorney Docket No: 243734.000222 about 20 units / ml, about 25 units / ml, about 30 units / ml, 35 units / ml, 40 units / ml, 45 units / ml, about 50 units / ml, about 55 units / ml, about 60 units / ml, about 65 units / ml. about 70 units / ml, about 75 units / ml, about 80 units / ml, about 85 units / ml, about 90 units / ml, about 95 units / ml, about 100 units / ml, about 105 units / ml, about 110 units / ml, about 115 units / ml, about 120 units / ml, about 125 units / ml, about 130 units / ml, about 135 units / ml, about 140 units / ml, about 145 units / ml. about 150 units / ml, about 155 units / ml, about 160 units / ml, about 165 units / ml, about 170 units / ml, about 175 units / ml, about 180 units / ml, about 185 units / ml. about 190 units / ml, about 195 units / ml, or about 200 units / ml. In some embodiments, the agent(s) used for expansion (e.g., IL-7, IL-15) are administered at about 5 mg / ml to about 10 ng / ml. In some embodiments, the agent(s) used for expansion (e.g., IL-7, IL-15) are administered at about 5.5 ng / ml to about 9.5 ng / ml, about 6 ng / ml to about 9 ng / ml, about 6.5 ng / ml to about 8.5 ng / ml, or about 7 ng / ml to about 8 ng / ml. In some embodiments, the agent(s) used for expansion (e.g., IL-7, IL-15) are administered at about 5 ng / ml, 6 ng / ml, 7 ng / ml, 8 ng / ml, 9, ng / ml, or 10 ng / ml.

[0351] After the immune effector cells are activated and transduced, the cells are cultured to proliferate. NK cells may be cultured for at least 1. 2, 3, 4, 5, 6, or 7 days, at least 2 weeks, at least 1, 2, 3. 4, 5, or 6 months or more with 1, 2. 3. 4, 5. 6. 7, 8, 9. or 10 or more rounds of expansion.

[0352] Agents that can be used for the expansion of natural killer cells can include agents that bind to CD 16 or CD56, such as, for example, aCD16 or aCD56 antibodies. In some embodiments, the binding agent includes antibodies (see for example Hoshino et al. Blood. 1991 Dec. 15; 78(12):3232-40 ). Other agents that may be used for expansion of NK cells may be IL-15 (see for example Vitale et al. 2002. The Anatomical Record. 266:87-92, which is incorporated by reference in their entirety for all purposes).

[0353] Conditions appropriate for T cell culture include an appropriate media (e.g., Minimal Essential Media (MEM), RPMI Media 1640, Lonza RPMI 1640, Advanced RPMI, Clicks, AIM-V, DMEM, a-MEM, F-12, TexMACS, X-Vivo 15, and X-Vivo 20, Optimizer, with added amino acids, sodium pyruvate, and vitamins, either serum-free or supplemented with an appropriate amount of serum (or plasma) or a defined set of hormones, and / or an amount of cytokine(s) sufficient for the growth and expansion).

[0354] Examples of other additives for immune effector cell expansion include, but are not limited to, surfactant, piasmanate, pH buffers such as HEPES, and reducing agents such as N- acetyl-cysteine and 2-mercaptoethanol, Antibiotics (e.g., penicillin and streptomycin), are included only in experimental cultures, not in cultures of cells that are to be infused into aAttorney Docket No: 243734.000222 subject. The target cells are maintained under conditions necessary to support growth, for example, an appropriate temperature (e.g.. 37° C) and atmosphere (e.g., air plus 5% CO2).

[0355] In certain embodiments, host cells e.g., immune effector cells of the present disclosure may be modified such that the expression of an endogenous TCR, MHC molecule, or other immunogenic molecule is decreased or eliminated. When allogeneic cells are used, rejection of the therapeutic cells may be a concern as it may cause serious complications such as the graft-versus-host disease (GvHD). Although not wishing to be bound by theory, immunogenic molecules (e.g., endogenous TCRs and / or MHC molecules) are typically expressed on the cell surface and are involved in self vs non-self-discrimination. Decreasing or eliminating the expression of such molecules may reduce or eliminate the ability of the therapeutic cells to cause GvHD.

[0356] In certain embodiments, expression of an endogenous TCR in the host cells e.g., an immune effector cell is decreased or eliminated. In a particular embodiment, expression of an endogenous TCR (e.g., a(3 TCR) in the host cells is decreased or eliminated. Expression of the endogenous TCR may be decreased or eliminated by disrupting the TRAC locus, TCR beta constant locus, and / or CD3 locus. In certain embodiments, expression of an endogenous TCR may be decreased or eliminated by disrupting one or more of the TRAC, TRBC1, TRBC2, CD3E, CD3G, and / or CD3D locus.

[0357] In certain embodiments, expression of one or more endogenous MHC molecules in the host cells e.g., immune effector cells, is decreased or eliminated. Modified MHC molecules may be an MHC class I or class II molecule. In certain embodiments, expression of an endogenous MHC molecule may be decreased or eliminated by disrupting one or more of the MHC, P2M, TAPI, TAP2, CUT A. RFX5, RFXAP and / or RFXANK locus.

[0358] Expression of the endogenous TCR, an MHC molecule, and / or any other immunogenic molecule in the host cell e.g., immune effector cells, can be disrupted using genome editing techniques such as Clustered regularly interspaced short palindromic repeats (CRISPR) / Cas, zinc finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and Meganucleases. These genome editing methods may disrupt a target gene by entirely knocking out all of its output or partially knocking down its expression. In a particular embodiment, expression of the endogenous TCR, an MHC molecule and / or any other immunogenic molecule in the host cell is disrupted using the CRISPR / Cas technique.Methods of Enhancing Immune Cell FunctionAttorney Docket No: 243734.000222

[0359] In one aspect, the present invention provides a method of enhancing immune cell function (e.g. preserved developmental potential (i.e., preserved stem-like state of differentiation)) of an immune effector cell. In a specific aspect, the present invention provides a method of maintaining cytolytic potential of an immune effector cell. Such methods may comprise modifying an MBD6 gene or gene product in the cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated. As a non-limiting example, the immune effector cell may be any of the various T cells disclosed herein. In particular, the T cell may be selected from, e.g., a CD8+ T cell, a CD4+ T cell, a cytotoxic T cell, an af> T cell receptor (TCR) T cell, a natural killer T (NKT) cell, a y5 T cell, a memory T cell, a T-helper cell, and a regulatory' T cell (Treg). In some embodiments, the immune effector cell may be an NK cell. In some embodiments, the above-described methods may comprise modifying the immune effector cell to express a CAR disclosed herein that is capable of binding to an antigen specific to tumor disclosed herein.

[0360] The methods may further comprise modifying a MBD5 gene or gene product in the immune effector cell so that the expression and / or function of MBD5 in the immune effector cell is reduced or eliminated. The methods may further comprise modifying a BAP1 gene or gene product in the immune effector cell so that the expression and / or function of BAP 1 in the immune effector cell is reduced or eliminated. The methods may further comprise modifying a ASXL1 gene or gene product in the immune effector cell so that the expression and / or function of ASXL 1 in the immune effector cell is reduced or eliminated. In some embodiments, the MBD6 gene, the MBD5 gene, the BAP1 gene, and / or the ASXL1 gene may be deleted.

[0361] In some embodiments, the MBD6, MBD5, BAP1, and / or ASXL1 gene or gene product in the immune effector cell may be modified in the presence of one or more inhibitory signals or agents (e.g., compound, small molecule, e.g.. small organic molecule, nucleic acid, polypeptide, or a fragment, isoform, variant, analog, or derivative thereof). In some embodiments, the MBD6, MBD5, BAP1, and / or ASXL1 gene or gene product may' be targeted using any number of various agents (e.g., a small molecule inhibitor). In certain embodiments, the agent may be used to reduce the expression and / or activity of MBD6, MBD5, BAP1, and / or ASXL1 in a immune effector cell disclosed herein.

[0362] In some embodiments, the small molecule may be, for example, a peptide and / or a pepti do mimetic. A peptidomimetic may include, e.g., chemically modified peptides and peptide-like molecules that contain non-naturally occurring amino acids, peptoids, and the like. Methods for identifying a peptidomimetics are well known in the art and may comprise the screening of databases that contain libraries of possible peptidomimetics.Attorney Docket No: 243734.000222

[0363] In some embodiments, the MBD6 gene in the immune effector cell is deleted or modified as a result of an activity of a site-specific nuclease. In some embodiments, the sitespecific nuclease is an RNA-guided endonuclease. In some embodiments, the RNA-guided endonuclease is a Cas9 protein. In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD6 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 167. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 168. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence of SEQ ID NO: 168. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 173. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 174. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence of SEQ ID NO: 174.

[0364] In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD6 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 182-SEQ ID NO: 184. In some embodiments, the Cas9 protein is programmed wi th a gRNA that comprises a nucleotide sequence of SEQ ID NO: 186- SEQ ID NO: 188. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence of SEQ ID NO: 186- SEQ ID NO: 188.

[0365] In some embodiments, the MBD5 gene in the immune effector cell is deleted or modified as a result of an activity of a site-specific nuclease. In some embodiments, the sitespecific nuclease is an RNA-guided endonuclease. In some embodiments, the RNA-guided endonuclease is a Cas9 protein. In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the MBD5 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 169. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 170. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD5 comprising a nucleotide sequence of SEQ ID NO: 170. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 171. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 172. In some aspects, the present invention provides a guide RNA (gRNA) targeting MBD5 comprising a nucleotide sequence of SEQ ID NO: 172.Attorney Docket No: 243734.000222

[0366] In some embodiments, the BAP1 gene in the immune effector cell is deleted or modified as a result of an activity of a site-specific nuclease. In some embodiments, the sitespecific nuclease is an RNA-guided endonuclease. In some embodiments, the RNA-guided endonuclease is a Cas9 protein. In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the BAP1 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 175. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 176. In some aspects, the present invention provides a guide RNA (gRNA) targeting BAP 1 comprising a nucleotide sequence of SEQ ID NO: 176. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 177. In some embodiments, the Cas9 protein is programmed with agRNA that comprises anucleotide sequence of SEQ ID NO: 178. In some aspects, the present invention provides a guide RNA (gRNA) targeting BAP1 comprising anucleotide sequence of SEQ ID NO: 178.

[0367] In some embodiments, the ASXL1 gene in the immune effector cell is deleted or modified as a result of an activity of a site-specific nuclease. In some embodiments, the sitespecific nuclease is an RNA-guided endonuclease. In some embodiments, the RNA-guided endonuclease is a Cas9 protein. In some embodiments, the Cas9 protein may be programmed with a gRNA that targets a locus within or near the ASXL1 gene. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 142. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 143. In some aspects, the present invention provides a guide RNA (gRNA) targeting ASXL1 comprising a nucleotide sequence of SEQ ID NO: 143. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 161. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 162. In some aspects, the present invention provides a guide RNA (gRNA) targeting ASXL1 comprising a nucleotide sequence of SEQ ID NO: 162. In some embodiments, the gRNA targets a nucleotide sequence comprising SEQ ID NO: 163. In some embodiments, the Cas9 protein is programmed with a gRNA that comprises a nucleotide sequence of SEQ ID NO: 164. In some aspects, the present invention provides a guide RNA (gRNA) targeting ASXL1 comprising a nucleotide sequence of SEQ ID NO: 164.

[0368] In alternative embodiments, the site-specific nuclease used in the methods described herein is a zinc finger nuclease, a TALEN nuclease, or a mega-TALEN nuclease.

[0369] In some embodiments, the MBD6. MBD5, BAP1, and / or ASXL1 gene product in the immune effector cell is deleted or modified as a result of an activity of an RNA interferenceAttorney Docket No: 243734.000222(RNAi) molecule or an antisense oligonucleotide. In some embodiments, the RNAi molecule is a small interfering RNA (siRNA) or a small hairpin RNA (shRNA).

[0370] In various embodiments, the site-specific nuclease, the RNAi molecule or the antisense oligonucleotide as described above is introduced into the immune effector cell via a viral vector, a non-viral vector, or a physical means described herein.

[0371] In some embodiments, the method further includes activation and / or expansion of the immune effector cell ex vivo.Pharmaceutical Compositions

[0372] In some embodiments, the compositions comprise one or more polypeptides, polynucleotides, vectors comprising same, and cell compositions, as disclosed herein. Compositions include, but are not limited to pharmaceutical compositions. In some embodiments, the compositions of the present invention comprise an amount of modified immune effector cells manufactured by the methods disclosed herein.

[0373] In one aspect, the present invention provides a pharmaceutical composition comprising a modified immune effector cell described herein and a pharmaceutically acceptable carrier and / or excipient. Examples of pharmaceutical carriers include but are not limited to sterile liquids, such as water and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like. Water or aqueous solution saline solutions and aqueous dextrose and glycerol solutions are preferably employed as carriers, particularly for injectable solutions.

[0374] Compositions comprising modified immune effector cells disclosed herein may comprise buffers such as neutral buffered saline, phosphate buffered saline and the like; carbohydrates such as glucose, mannose, sucrose or dextrans, mannitol; proteins; polypeptides or amino acids such as glycine; antioxidants; chelating agents such as EDTA or glutathione; adjuvants (e.g.. aluminum hydroxide); and preservatives.

[0375] Compositions comprising modified immune effector cells disclosed herein may comprise one or more of the following: sterile diluents such as water for injection, saline solution, preferably physiological saline, Ringer's solution, isotonic sodium chloride, fixed oils such as synthetic mono or diglycerides which may serve as the solvent or suspending medium, polyethylene glycols, glycerin, propylene glycol or other solvents; antibacterial agents such as benzyl alcohol or methyl paraben; antioxidants such as ascorbic acid or sodium bisulfite; chelating agents such as ethylenediaminetetraacetic acid; buffers such as acetates, citrates or phosphates and agents for the adjustment of tonicity such as sodium chloride or dextrose.Attorney Docket No: 243734.000222

[0376] In some embodiments, the compositions are formulated for parenteral administration, e.g., intravascular (intravenous or intraarterial), intraperitoneal, intratumoral, intraventricular, intrapleural or intramuscular administration. The parenteral preparation can be enclosed in ampoules, disposable syringes or multiple dose vials made of glass or plastic. An injectable pharmaceutical composition is preferably sterile. In some embodiments, the composition is reconstituted from a lyophilized preparation prior to administration.

[0377] In some embodiments, the modified immune effector cells may be mixed with substances that adhere or penetrate then prior to their administration, e g., but not limited to, nanoparticles.Therapeutic Methods

[0378] In one aspect, the present invention provides a method of treating a disease or disorder in a subject in need thereof, including administering to the subject an effective amount of the modified immune effector cells or the pharmaceutical composition described herein. In some embodiments, the modified immune effector cells are prepared by the methods as disclosed above.

[0379] In some embodiments, the modified immune effector cell is an autologous cell. In some embodiments, the modified immune effector cell is an allogeneic cell.

[0380] In some embodiments, the disease being treated by the therapeutic methods described herein is a cancer, an infectious disease, an inflammatory disorder, or an autoimmune disease.

[0381] The terms “cancer” and “cancerous” refer to or describe the physiological condition in mammals that is typically characterized by unregulated cell growth. The term “cancer” includes, for example, the soft tissue tumors (e.g., lymphomas), and tumors of the blood and blood-forming organs (e.g., leukemias), and solid tumors, which is one that grows in an anatomical site outside the bloodstream (e.g., carcinomas). Examples of cancer include, but are not limited to, carcinoma, lymphoma, blastoma, sarcoma (e.g., osteosarcoma or rhabdomyosarcoma), and leukemia or lymphoid malignancies. More particular examples of such cancers include squamous cell cancer (e.g., epithelial squamous cell cancer), adenosquamous cell carcinoma, lung cancer (e.g., including small-cell lung cancer, non-small cell lung cancer, adenocarcinoma of the lung, squamous carcinoma of the lung), cancer of the peritoneum, hepatocellular cancer, gastric or stomach cancer (e.g., including gastrointestinal cancer, pancreatic cancer), cervical cancer, ovarian cancer, liver cancer, bladder cancer, cancer of the urinary tract, hepatoma, breast cancer, colon cancer, rectal cancer, colorectal cancer,Attorney Docket No: 243734.000222 endometrial or uterine carcinoma, salivary gland carcinoma, kidney or renal cancer, prostate cancer, vulval cancer, thyroid cancer, hepatic carcinoma, anal carcinoma, penile carcinoma, primary or metastatic melanoma, multiple myeloma and B-cell lymphoma, non-Hodgkin's lymphoma, Hodgkin's lymphoma, brain (e.g., high grade glioma, diffuse pontine glioma, ependymoma, neuroblastoma, or glioblastoma), as well as head and neck cancer, and associated metastases. Additional examples of cancer can be found in The Merck Manual of Diagnosis and Therapy, 19th Edition. § on Hematology and Oncology, published by Merck Sharp & Dohme Corp., 2011 (ISBN 978-0-911910-19-3); The Merck Manual of Diagnosis and Therapy, 20th Edition, § on Hematology and Oncology, published by Merck Sharp & Dohme Corp., 2018 (ISBN 978-0-911-91042-1) (2018 digital online edition at internet website of Merck Manuals); and SEER Program Coding and Staging Manual 2016, each of which are incorporated by reference in their entirety for all purposes.

[0382] In some embodiments, the cancer is a solid tumor. Non-limiting examples of solid tumors include osteosarcoma, medulloblastoma, glioblastoma ependymoma and high-grade gliomas. In some embodiments, the cancer is a breast, prostate, urinary bladder, skin, lung, ovary, sarcoma, or brain cancer.

[0383] In some embodiments, the cancer is a liquid tumor such as, but not limited to leukemia, including chronic leukemia, e.g., chronic myelocytic (granulocytic) leukemia and chronic lymphocytic leukemia, acute leukemia, e.g.. acute lymphocytic leukemia, acute myelocytic leukemia, and myeloblastic. promyelocytic, myelomonocytic. monocytic and erythroleukemia, lymphoma, Waldenstrom's macroglobulinemia, Hodgkin’s disease, nonHodgkin’s lymphoma, polycythemia vera, multiple myeloma, and heavy chain disease. In some embodiments, the liquid tumor is B-cell acute lymphoblastic leukemia.

[0384] In various embodiments, the liquid tumor may comprise a hematologic cancer, i.e., a blood cancer which may originate from or occur within blood-forming tissue, e.g., blood and / or bone marrow. In some embodiments a hematologic cancer may originate from or occur within lymph nodes.

[0385] The therapeutic methods described herein may be used to treat a cancer expressing, e.g., CD19. CD22. CD123, CD33. B7-H3. BCMA, HER2, IL13Ra2. or EphA2.

[0386] Cancers expressing B7-H3 may include, but are not limited to, osteosarcoma, rhabdomyosarcoma, Ewing’s sarcoma and other Ewing’s sarcoma family of tumors, neuroblastoma, ganglioneuroblastoma, desmoplastic small round cell tumor, malignant peripheral nerve sheath tumor, synovial sarcoma, undifferentiated sarcoma, adrenocortical carcinoma, hepatoblastoma, Wilms tumor, rhabdoid tumor, high grade glioma (glioblastomaAttorney Docket No: 243734.000222 multiforme), medulloblastoma, astrocytoma, glioma, ependymoma, atypical teratoid rhabdoid tumor, meningioma, craniopharyngioma, primitive neuroectodermal tumor, diffuse intrinsic pontine glioma and other brain tumors, acute myeloid leukemia, multiple myeloma, lung cancer, mesothelioma, breast cancer, bladder cancer, gastric cancer, prostate cancer, colorectal cancer, endometrial cancer, cervical cancer, renal cancer, esophageal cancer, ovarian cancer, pancreatic cancer, hepatocellular carcinoma and other liver cancers, head and neck cancers, leiomyosarcoma, and melanoma. In some embodiments, the cancer expressing B7-H3 may include, without limitation, osteosarcoma, and glioblastoma. In some embodiments, the cancer expressing B7-H3 may be a brain tumor. Non-limiting examples of brain tumors include highgrade gliomas, medulloblastoma, ependymoma, and atypical teratoid rhabdoid tumors. The cancer expressing B7-H3 may include, without limitation, high-grade gliomas, medulloblastoma, ependymoma, and atypical teratoid rhabdoid tumors.

[0387] Cancers expressing HER2 may include, but are not limited to, sarcomas such as angiosarcoma, chondrosarcoma, Ewing’s sarcoma, fibrosarcoma, gastrointestinal stromal tumor, leiomyosarcoma, liposarcoma, malignant peripheral nen e sheath tumor, osteosarcoma, pleomorphic sarcoma, rhabdomyosarcoma, or synovial sarcoma; brain cancers such as glioblastoma; breast, prostate, lung, and colon cancers or epithelial cancers / carcinomas such as breast cancer, colon cancer, prostate cancer, head and neck cancer, skin cancer; cancers of the genitourinary tract such as ovarian cancer, endometrial cancer, cervical cancer and kidney cancer; lung cancer, gastric cancer, cancer of the small intestine, liver cancer, pancreatic cancer, gall bladder cancer, cancers of the bile duct, esophagus cancer, cancer of the salivary glands and cancer of the thyroid gland. In some embodiments, the cancer is a HER2-positive breast cancer.

[0388] Cancers expressing IL 13Ra2 may include, but are not limited to. brain cancers such as glioblastoma, colon cancer, renal cell carcinoma, pancreatic cancer, melanoma, head and neck cancer, mesothelioma, and ovarian cancer. In some embodiments, the cancer is an IL 13Ra2 -positive glioblastoma.

[0389] Cancers expressing EphA2 may include, but are not limited to, sarcomas such as rhabdomyosarcoma, osteosarcoma, and Ewing’s sarcoma; breast, prostate, urinary bladder, skin cancers including melanoma, lung cancer, liver cancer, ovarian cancer, stomach cancer, colorectal cancer, thyroid cancer, head and neck cancer, cervical cancer, pancreatic cancer, endometrial cancer, and brain cancers.

[0390] The therapeutic methods described herein may be used to treat a virus expressing, e.g., gp!20.Attorney Docket No: 243734.000222

[0391] A virus expressing gpl20 may include, but is not limited to, human immunodeficiency virus.

[0392] The therapeutic methods described herein may include the steps of (i) isolating an immune effector cell from the subj ect or a donor; (ii) modifying an MBD6 gene or gene product in the immune effector cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated; (iii) introducing the modified immune effector cell into the subject.

[0393] The therapeutic methods described herein may include the steps of (i) isolating an immune effector cell from the subject or a donor; (ii) modify ing an MBD6, an MBD5, a BAP1, and / or an ASXL1 gene or gene product in the immune effector cell so that the expression and / or function of MBD6, MBD5, BAP1, and / or ASXL1 in the immune effector cell is reduced or eliminated; (iii) introducing the modified immune effector cell into the subject.

[0394] Activating the STAT5 signaling pathway in the immune effector cell may be achieved by stimulating the immune effector cell with a signaling molecule either ex vivo or in vivo. For example, stimulating the immune effector cell with a signaling molecule may be carried out by mixing the immune effector cell directly with the signaling molecule, or with a carrier (e.g., nanoparticles) containing the signaling molecule ex vivo. Mixing of the immune effector cell with the signaling molecule, or with a carrier (e.g., nanoparticles) containing the signaling molecule may be carried out prior to administration, or during administration. In some embodiments, the immune effector cells may be administered with nanoparticle “backpacks” which are capable of carrying signaling molecules and attaching them to the immune effector cells. Such nanoparticle “backpacks” may selectively release the signaling molecules in response to certain stimuli, such as the activation of the immune effector cell (Tang L., Nat Biotechnol. 2018;36(8):707-716, which is incorporated by reference in their entirety for all purposes).

[0395] Alternatively, signaling molecules may be provided to the modified immune effector cells in vivo by administration of the signaling molecule, for example systemically, to the subject such that the signaling molecule can ultimately contact the modified immune effector cells. Signaling molecules may also be provided to the modified immune effector cells in vivo using oncolytic viruses encoding the signaling molecule. Oncolytic viruses can selectively infect and / or lyse cancer or tumor cells as compared to normal cells. Exemplary oncolytic viruses include a herpes simplex virus-1, a herpes simplex virus-2, a vesicular stomatitis virus, and a vaccinia virus.

[0396] Activating the STAT5 signaling pathway in the immune effector cell may also be achieved by genetically modifying the immune effector cell to express a signaling molecule.Attorney Docket No: 243734.000222The signaling molecule may be expressed from a transgene introduced into the immune effector cell. Alternatively, the STAT5 signaling pathway is activated by modifying the immune effector cell to express a constitutively active cytokine receptor or a switch receptor. Such constitutively active cytokine receptor may be a constitutively active IL7 receptor (C7R). Such switch receptor may be an IL-4 / IL-7 receptor or an IL-4 / IL-2 receptor.

[0397] In some embodiments, the therapeutic methods include genetically modifying the immune effector cell to express a chimeric antigen receptor (CAR) that is capable of binding specifically to an antigen. In some embodiments, the therapeutic methods include genetically modify ing the immune effector cell to express a T cell receptor (TCR) that is capable of binding specifically to an antigen.

[0398] In some embodiments, the subject is human.

[0399] In cases where the immune effector cell is isolated from a donor, the method may further include a method to prevent graft-versus-host disease (GvHD) and the immune effector cell rejection.

[0400] In some embodiments of any of the therapeutic methods described above, the composition is administered in a therapeutically effective amount. The dosages of the composition administered in the methods of the invention will vary widely, depending upon the subject’s physical parameters, the frequency of administration, the manner of administration, the clearance rate, and the like. The initial dose may be larger, and might be followed by smaller maintenance doses. The dose may be administered as infrequently as weekly or biweekly, or fractionated into smaller doses and administered daily, semi-weekly, etc., to maintain an effective dosage level. It is contemplated that a variety of doses will be effective to achieve in vivo persistence of immune effector cells. It is also contemplated that a variety of doses will be effective to improve in vivo effector function of immune effector cells.

[0401] In some embodiments, compositions comprising the immune effector cells manufactured by the methods described herein may be administered at a dosage of 102to 1010cells / kg body weight, 105to 109cells / kg body weight, 105to 108cells / kg body weight, 105to 107cells / kg body weight, 107to 109cells / kg body weight, or 107to 108cells / kg body weight, including all integer values within those ranges. The number of immune effector cells will depend on the therapeutic use for which the composition is intended for.

[0402] Modified immune effector cells may be administered multiple times at dosages listed above. The immune effector cells may be allogeneic, syngeneic, xenogeneic, or autologous to the patient undergoing therapy.Attorney Docket No: 243734.000222

[0403] The compositions and methods described in the present disclosure may be utilized in conjunction with other types of therapy for cancer, such as chemotherapy, surgery, radiation, gene therapy, and so forth.

[0404] It is also contemplated that when used to treat various diseases / disorders, the compositions and methods of the present disclosure can be utilized with other therapeutic methods / agents suitable for the same or similar diseases / disorders. Such other therapeutic methods / agents can be co-administered (simultaneously or sequentially) to generate additive or synergistic effects. Suitable therapeutically effective dosages for each agent may be lowered due to the additive action or synergy.

[0405] In some embodiments of any of the above therapeutic methods, the method further comprises administering to the subject one or more additional compounds selected from immuno-suppressives, biologicals, probiotics, prebiotics, and cytokines (e.g., IFN or IL-2).

[0406] As a non-limiting example, the invention can be combined with other therapies that block inflammation (e.g., via blockage of ILL INFa / 0, IL6, TNF, IL23, etc.).

[0407] The methods and compositions of the invention can be combined with other immunomodulatory treatments such as. e.g., therapeutic vaccines (including, but not limited to, GV AX, DC-based vaccines, etc ), checkpoint inhibitors (including, but not limited to, agents that block CTLA4, PD1, LAG3, TIM3, etc.) or activators (including, but not limited to, agents that enhance 4-1BB, 0X40, etc.). The methods of the invention can be also combined with other treatments that possess the ability’ to modulate NK.T function or s tabi 1 ity . including but not limited to, CDl d, CD I d-fusion proteins, CDl d dimers or larger polymers of CDl d either unloaded or loaded with antigens, CD 1 d-chimeric antigen receptors (CDld-CAR), or any other of the five known CD1 isomers existing in humans (CDla, CDlb, CDlc, CDle). The methods of the invention can also be combined with other treatments such as midostaurin, enasidenib, or a combination thereof.

[0408] Therapeutic methods of the invention can be combined with additional immunotherapies and therapies. For example, when used for treating cancer, the compositions of the invention can be used in combination with conventional cancer therapies, such as, e.g., surgery, radiotherapy, chemotherapy or combinations thereof, depending on type of the tumor, patient condition, other health issues, and a variety of factors. In certain aspects, other therapeutic agents useful for combination with conventional cancer therapies include anti- angiogenic agents. Many anti-angiogenic agents have been identified and are known in the art, including, e.g., TNP-470, platelet factor 4, thrombospondin- 1, tissue inhibitors of metalloproteases (TIMP1 and TIMP2), prolactin (16-K.d fragment), angiostatin (38-K.dAttorney Docket No: 243734.000222 fragment of plasminogen), endostatin, bFGF soluble receptor, transforming growth factor beta, interferon alpha, soluble KDR and FLT-1 receptors, placental proliferin-related protein, as well as those listed by Carmeliet and Jain (2000). In one embodiment, the immune effector cells of the invention can be used in combination with a VEGF antagonist or a VEGF receptor antagonist such as anti-VEGF antibodies, VEGF variants, soluble VEGF receptor fragments, aptamers capable of blocking VEGF or VEGFR. neutralizing anti-VEGFR antibodies, inhibitors of VEGFR tyrosine kinases and any combinations thereof (e.g., anti-hVEGF antibody A4.6.1, bevacizumab or ranibizumab).

[0409] Non-limiting examples of chemotherapeutic compounds which can be used in combination treatments of the present invention include, for example, aminoglutethimide, amsacrine, anastrozole, asparaginase, azacitidine, beg, bicalutamide, bleomycin, buserelin, busulfan, campothecin, capecitabine, carboplatin, carmustine, chlorambucil, cisplatin, cladribine, clodronate, colchicine, cyclophosphamide, cyproterone, cytarabine, dacarbazine, dactinomycin, daunorubicin, decitabine, dienestrol, diethylstilbestrol, docetaxel, doxorubicin, epirubicin, estradiol, estramnustine, etoposide, exemestane, filgrastim, fludarabine, fludrocortisone, fluorouracil, fluoxymesterone. flutamide, gemcitabine, genistein, goserelin. hydroxyurea, idarubicin, ifosfamide, imatinib, interferon, irinotecan, ironotecan, letrozole, leucovorin, leuprolide, levamisole, lomustine, mechlorethamine, medroxyprogesterone, megestrol, melphalan, mercaptopurine, mesna, methotrexate, mitomycin, mitotane, mitoxantrone, nilutamide, nocodazole, octreotide, oxaliplatin, paclitaxel, pamidronate, pentostatin, plicamycin, porfimer, procarbazine, raltitrexed, rituximab, streptozocin, suramin, tamoxifen, temozolomide, teniposide, testosterone, thioguanine, thiotepa, titanocene dichloride, topotecan, trastuzumab, tretinoin, vinblastine, vincristine, vindesine, and vinorelbine.

[0410] These chemotherapeutic compounds may be categorized by their mechanism of action into, for example, following groups: anti-metabolites / anti-cancer agents, such as pyrimidine analogs (5 -fluorouracil, floxuridine, capecitabine, gemcitabine and cytarabine) and purine analogs, folate antagonists and related inhibitors (mercaptopurine, thioguanine, pentostatin and 2-chlorodeoxyadenosine (cladribine)); antiproliferative / antimitotic agents including natural products such as vinca alkaloids (vinblastine, vincristine, and vinorelbine), microtubule disruptors such as taxane (paclitaxel, docetaxel), vincristin, vinblastin, nocodazole, epothilones and navelbine, epidipodophyllotoxins (etoposide, teniposide), DNA damaging agents (actinomycin, amsacrine, anthracy clines, bleomycin, busulfan, camptothecin, carboplatin, chlorambucil, cisplatin, cyclophosphamide, cytoxan, dactinomycin, daunorubicin,Attorney Docket No: 243734.000222 doxorubicin, epirubicin, hexamethyhnelamineoxaliplatin, iphosphamide, melphalan, merchlorehtamine. mitomycin, mitoxantrone, nitrosourea, plicamycin, procarbazine, taxol, taxotere, teniposide, tri ethylenethiophosphoramide and etoposide (VP 16)); antibiotics such as dactinomycin (actinomycin D), daunorubicin, doxorubicin (adriamycin), idarubicin, anthracyclines, mitoxantrone, bleomycins, plicamycin (mithramycin) and mitomy cin; enzymes (L-asparaginase which systemically metabolizes L-asparagine and deprives cells which do not have the capacity to synthesize their own asparagine); antiplatelet agents; antiproliferative / antimitotic alky lating agents such as nitrogen mustards (mechlorethamine, cyclophosphamide and analogs, melphalan, chlorambucil), ethylenimines and methylmelamines (hexamethylmelamine and thiotepa), alkyl sulfonates-busulfan, nitrosoureas (carmustine (BCNU) and analogs, streptozocin), trazenes-dacarbazinine (DTIC); antiproliferative / antimitotic antimetabolites such as folic acid analogs (methotrexate); platinum coordination complexes (cisplatin, carboplatin), procarbazine, hydroxyurea, mitotane, aminoglutethimide; hormones, hormone analogs (estrogen, tamoxifen, goserelin, bicalutamide, nilutamide) and aromatase inhibitors (letrozole, anastrozole); anticoagulants (heparin, synthetic heparin salts and other inhibitors of thrombin); fibrinolytic agents (such as tissue plasminogen activator, streptokinase and urokinase), aspirin, dipyridamole, ticlopidine, clopidogrel, abciximab; antimigratory agents; antisecretory agents (breveldin); immunosuppressives (cyclosporine, tacrolimus (FK-506), sirolimus (rapamycin), azathioprine, my cophenolate mofetil); anti-angiogenic compounds (e.g., TNP-470. genistein, bevacizumab) and growth factor inhibitors (e.g., fibroblast growth factor (FGF) inhibitors); angiotensin receptor blocker; nitric oxide donors; anti-sense oligonucleotides; antibodies (trastuzumab); cell cycle inhibitors and differentiation inducers (tretinoin); mTOR inhibitors, topoisomerase inhibitors (doxorubicin (adriamycin), amsacrine, camptothecin, daunorubicin. dactinomycin, eniposide, epirubicin, etoposide, idarubicin and mitoxantrone, topotecan, irinotecan), corticosteroids (cortisone, dexamethasone, hydrocortisone, methylpednisolone, prednisone, and prenisolone); growth factor signal transduction kinase inhibitors; mitochondrial dysfunction inducers and caspase activators; and chromatin disruptors.

[0411] In various embodiments of the methods described herein, the subject is a human. The subject may be a juvenile or an adult, of any age or sex.

[0412] In accordance with the present invention there may be numerous tools and techniques within the skill of the art, such as those commonly used in molecular biology, pharmacology, and microbiology. Such tools and techniques are described in detail in e.g., Sambrook et al. (2001) Molecular Cloning: A Laboratory Manual. 3rd ed. Cold Spring HarborAttorney Docket No: 243734.000222Laboratory Press: Cold Spring Harbor, New York; Ausubel et al. eds. (2005) Current Protocols in Molecular Biology. John Wiley and Sons, Inc.: Hoboken, NJ; Bonifacino et al. eds. (2005) Current Protocols in Cell Biology. John Wiley and Sons, Inc.: Hoboken, NJ; Coligan et al. eds. (2005) Current Protocols in Immunology, John Wiley and Sons, Inc.: Hoboken, NJ; Coico et al. eds. (2005) Current Protocols in Microbiology', John Wiley and Sons, Inc.: Hoboken, NJ; Coligan et al. eds. (2005) Current Protocols in Protein Science, John Wiley and Sons, Inc.: Hoboken, NJ; and Enna et al. eds. (2005) Cunent Protocols in Pharmacology, John Wiley and Sons, Inc.: Hoboken, NJ.EXAMPLES

[0413] The present invention is also described and demonstrated by way of the following examples. However, the use of these and other examples anywhere in the specification is illustrative only and in no way limits the scope and meaning of the invention or of any exemplified term. Likewise, the invention is not limited to any particular preferred embodiments described here. Indeed, many modifications and variations of the invention may be apparent to those skilled in the art upon reading this specification, and such variations can be made without departing from the invention in spirit or in scope. The invention is therefore to be limited only by the terms of the appended claims along with the full scope of equivalents to which those claims are entitled.Example 1. Disruption of MBD6 alone or in combination with MBD5 preserves CD8 T cell proliferative response to immune checkpoint blockade (ICB)

[0414] In the present Example, guide RNAs were optimized for disrupting the MBD6, alone or in combination with MBD5 gene in P14 CD8 T cells. Synthego analysis of the PCR amplified target region confirmed efficient editing of MBD5 and MBD6. These genetically modified Pl 4 CD8 T cells were adoptively transferred into mice which were subsequently infected with chronic lymphocytic choriomeningitis virus (LCMV). The gene edited P14 CD8 T cells were then adoptively transferred into mice that were subsequently infected with chronic LCMV clone 13. The percentage of P14 CD8 T cells among total CD8 T cells isolated from the peripheral blood of PD-L1 treated mice during chronic LCMV infection was longitudinally tracked (Fig. 1A). The frequency of the MBD6 KO P14 cells and the MBD5&6 double KO P14 cells increased significantly after anti-PDLl blockade demonstrating hyperresponsiveness to PDL1 mediated immune checkpoint blockade, and suggesting the disruption of MBD6 and MBD5&6 preserved a stem-like state of T cell differentiation.Attorney Docket No: 243734.000222

[0415] To further assess for a stem-like phenotype, the expression of CD62L, CD127, CXCR3, CD27, KLRG1, Tim3, Lyl08, and GzmB and TCF1 was examined among the wildtype (ROSA), MBD6 KO, and MBD5&6 double KO P14 CD8 T cells isolated from spleen of PD-L1 treated mice at 60 days post LCMV chronic infection (Fig. IB). Compared to Rosa control, MBD6 KO and MBD5 / 6 double KO P14 cells exhibited stem-like T cell phenotype in terms of increased expression of stem-like T cell markers such as CXCR3, CD27, Lyl08, and TCF1 as well as decreased effector markers such as KLRG1. Wildt pe. MBD6 KO, and MBD5&6 double KO P14 CD8 T cells isolated from spleen of PD-L1 treated mice at 60 days post LCMV infection were additionally FACS sorted (Fig. 1C). Compared to Rosa control, MBD6 KO and MBD5 / 6 double KO P14 cells exhibited stem-like T cell phenotype in terms of increased expression of stem-like T cell markers Lyl08. Stem-like phenotype was also assessed in Rosa, Mbd6 and Mbd5 / 6 KO P14 cells isolated from the peripheral blood of PD-L1 treated mice post chronic LCMV infection (Fig. ID). Compared to Rosa control, MBD6 KO and MBD5 / 6 double KO P14 cells exhibited stem-like T cell phenotype in terms of increased expression of stem-like T cell markers such as CD127, CD27, and Lyl08 as well as decreased effector markers such as KLRG1. Collectively these data demonstrate that disruption of MBD6 and MBD5&6 preserves the T cells in a stem-like state that retains a proliferative and functional capacity. Since MBD6 interacts directly with the poly comb deubiquitinase complex (PR-DUB), which catalyzes deubiquitination of H2AK119. a western blot was performed to measure H2AK119Ub expression in activated Rosa and MBD6 KO mouse CD8 T cell ex vivo (Fig. IE). As expected, MBD6 KO mouse T cells showed higher levels of H2AK119Ub compared to control (Rosa).

[0416] Materials and Methods

[0417] Mice and viral infections: C56BL / 6J mice were obtained from the Jackson laboratory (Jax; stock no. 000664). The P14 TCR transgenic mouse line was back crossed into a C57BL / 6J Thy 1.1 background (Jax, stock no.000406). For all in vivo experiments, 8- to 12- week-old mice were used. Mice allocated to different experimental groups were sex-, age-, and housing-matched. Mice were randomized for all experiments. For chronic virus infection, mice were infected with LCMV clone 13 (2 x 106puf, i.v.). All animal studies were performed in accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health (NIH).

[0418] Flow cytometric analysis: PBMC were isolated from whole blood by repeated lysis with ACK lysis buffer. For phenotypic analysis of lymphocytes, single-cell suspensionAttorney Docket No: 243734.000222 was plated at IO6cells / well in round 96 well plates in PBS containing 2% FBS and stained with fluorochrome-conjugated antibodies for 20 minutes at 4°C,

[0419] CD8 T cell RNP electroporation: Naive mouse CD8 T cells were isolated from spleens of P14 mice, following manufacturer’s instructions (Stem Cell EasySep™). CD8 T cells were activated in the presence of 0.5 pg / ml anti-CD3 and 5 pg / ml anti-CD28 antibody (Thermo Fisher). RNP complexes were formed for 20 minutes at room temperature using Cas9 (Alt-R S.p. Cas9 Nuclease, IDT) and sgRNA per target (Synthego, IDT). Electroporation was performed on 106CD8 T cells using 4D-Nuvleotector X Unit and P4 primary cell 4D-Nucleofector TM X Kit, with pulse CM137 (Lonza). Cells were rested at 37°C for 3 to 4 days. Cells w ere harvested and washed with PBS prior to transfer in recipient mice.

[0420] Adoptive T cell transfer: For LCMV model, 5 x 103- 104CRISPR-edited P14 cells were injected into recipient mice 18-24 hours before infection.

[0421] In vivo treatment: For PD-1 blockade, age-matched C57BL / 6 mice were chronically infected with LCMV clone 13 as described above. Mice were randomly assigned to experimental groups. At > 30 dpi mice were injected intraperitoneally with isotype or PD- L1 antibody (Bio X cell; 200pg) every 3 days.

[0422] Western blot analysis: Proteins were extracted from cells by using NE-PER Nuclear and cytoplasmic Extraction Reagents (Thermo Fisher). For whole cell extraction, extraction buffer (400mM KC1, 20mM HEPES, 0.4mM EDTA, 20% Glycerol) with 0.1% Triton-100 and lx EDTA free protease inhibitor was used for 30 minutes with rocking, then centrifuged for 30 minutes at maximum speed to extract the proteins.Example 2. CRISPR-mediated knockout (KO) of MBD6 in murine antigen-specific T cells.

[0423] Clonal expansion of hematopoietic stem cells (HSCs) occurs in the majority of otherwise healthy adults with age (43). Such clonal hematopoiesis (CH) of indeterminate potential (CHIP) mainly results from mutations of epigenetic regulators, e.g., MBD6 or MBD5&6. Importantly, these mutations in the stem cell compartment are enriched in the downstream cellular populations, including T cells. When leukemia patients receive donor stem cells that contain CH-associated mutations, their outcome appears to be linked to the type of donor cell mutations. As an example, recipients of stem cells with CH-associated DNMT3AAttorney Docket No: 243734.000222 mutations have a significant increase in overall survival. This survival appears to be coupled to T cell function since the enhanced survival is lost in a cohort of patients that received posttransplant cyclophosphamide to prevent graft-versus-host disease (GvHD) by depleting T cells. The disparate clinical outcomes of these recipients suggest unique influences of cellular differentiation. Despite the increasing prevalence of CHIP with age, only a subset of patients develop cancer, raising the question as to what drives malignant transformation, and how epigenetic regulators specifically contribute to T cell homeostasis. The present Example, as well as, e g., Example 3 (see below), will use the LCMV model system of chronic viral infection to assess the role of MBD6 or MBD5&6 which allows for interrogation of antigenspecific T cells in a fully-intact animal model.

[0424] To identify the epigenetic programs controlled by CH-associated driver MBD6 or MBD5 & 6 during T cell differentiation, CRISPR technology is used to knockout (KO) MBD6 or MBD5 & 6 in murine antigen-specific T cells. Specifically, KO of MBD6 or MBD5 & 6 is performed in P14 CD8 T cells which are T-cell receptor (TCR) transgenic cells that recognize lymphocytic choriomeningitis virus (LCMV). The genetically edited P14 CD8 T cells (Thy 1.1) will be injected into congenically distinct (Thy 1.2) WT B6 mice which will then be infected with LCMV. The P14 CD8 T cell immunological response will be tracked longitudinally during effector and memory' T cell differentiation. Phenotyping will be performed to characterize T cell homing (CD 103, CD69, & CD62L) and to examine the phenotypic transition between a stem-like state to fully exhausted (PD-1, Tim3, CD101. Cxcr3, and Slamf6). In addition, functional assays will be performed to assess proliferation (Cell Trace Violet [CTV] labeling and adoptive transfer of chronically stimulated P14s into infection matched animals) and effector function (ex vivo assessment of cytokine secretion after gp33 peptide stimulation). Fluorescence-activated Cell Sorting (FACS) purification of P14 T cells will allow for examination of their epigenetic heterogeneity through scRNAseq single-cell RNA sequencing (scRNAseq), single-cell assay for transposase-accessible chromatin using sequencing (scATACseq), and whole-genome methylation (WGM) profiling approaches as the T cells enter a homeostatic versus hyperproliferative state. MPI (23) will also be used to determine the differentiation status of the genetically modified P14 T cells and to correlate this multipotency score to persistence and expansion. A homeostatic state described herein may comprise an ability of a cell to continue to divide at a rate essentially to maintain a steady or stable population size. A hyperproliferative state described herein may comprise an increasing number of cellular divisions of a cell which can be associated with increasing cell populations. A multivariate linear regression model will be used to model the relationship between P14 TAttorney Docket No: 243734.000222 cell expansion and the multipotency score. Specifically, expansion is the dependent variable, multipotency score and other features such as viral load are explanatory variables.

[0425] By way of a non-limiting example, whole-genome methylation analysis will be performed by sequencing samples, e.g., to a depth of 30x coverage, giving the statistical power to discern changes in CpG methylation of ±20% (p=0.05 using Fisher’s exact test with 2x2 contingency tables). Analysis of the WGBS data generated herein will include determining the quality of the sequence data including base score and library complexity, and the total percent of CpGs covered with sufficient pow er to discern at least a 50% change in methylation. Current protocol yields ~ 80% of CpGs having 30X sequencing coverage. For example, without limitation, with a sample size of 6 and assuming 10,000 non-differentially methylated regions with 100 false positive differentially methylated regions (DMRs) and a mean difference of methylation being 0.2, the anticipated standard deviation of the methylation difference is 0.1 with a power of 0.8. To estimate sample size needed for the phentoypic and functional studies it can be calculated that 20 WT and 20 KO mice will allow for detection of differences among cell subsets with levels differing between WT and KO mice with a large effect size of 0.9, using a two-sample t test, with a power of 80% at a type 1 error level of 0.05. Both male and female mice will be used in equal numbers and results will be reported based on individual sex and combined.Example 3. Evaluation of hyperproliferative state in the setting of MBD6 and MBD5 & 6 gene disruption.

[0426] To determine if the hyperproliferative state that occurs in the setting of MBD6_or MBD5 & 6 gene disruption in T cells requires persistent T cell receptor (TCR) engagement, MBD6 or MBD5& 6 KO P14 T cells from chronic LCMV infected mice will be adoptively transferred into one of two groups of WT B6 mice. One group of mice will have already been infected with acute LCMV and fully recovered. These immunized animals wall clear any virus that is transferred along w ith the P 14 cells, thus allowing for monitoring of cell numbers in the absence of antigen. The other group of mice will be infected with chronic LCMV in order for the P14 T cells to receive persistent TCR signaling. T cell expansion will be monitored longitudinally by measuring the percentage and absolute number of P14 CD8 T cells isolated from peripheral blood longitudinally. In addition, the MBD6 or MBD5 & 6 KO P14 CD8 T cells will be CTV labeled prior to adoptive transfer into both the fully recovered and chronically infected mice to assess proliferative capacity. Epigenetic profiling (DNA methylation and ATACseq), e.g., using approaches similar to or the same as those described in Example 3, willAttorney Docket No: 243734.000222 be used to identify differences related to the presence or absence of persistent TCR engagement. The P14 CD8 T cell DNA methylation profiles will be assessed with MPI as described herein (see, e.g.. Example 3). In addition, functional assays will be performed, including characterization of cytokine secretion.

[0427] MBD6 or MBD5&6 gene disruption will be tested using a murine CAR T cell model(s) with an intact immune system. Additionally, targeted approaches will be developed using small molecules to specifically modify genes identified to be associated with CD8 T cell proliferative ability’.Example 4. Evaluation of imprint of proliferation checkpoints prior to memory generation.

[0428] Epigenetic programs can be coupled to the development of CAR T cell exhaustion in autologous CD19 CAR T cells isolated longitudinally from patients. The present Example is designed to test whether disruption of CH-associated gene(s), e.g., MBD6 or MBD5&6, disrupts T cell homeostasis programs prior to the establishment of memory T cell gene expression programs. Further, whether mutations in MBD6 or MBD5&6 predispose CD8 T cells to undergo antigen-independent proliferation will be determined.

[0429] Knockout (KO) of MBD6 or MBD5&6 will be performed in CAR T cells generated from both naive and memory T cell subsets. Naive and memory T cells will be FACS purified based on the expression of CCR7 and CD45RO (3. 4, 14). The naive and memory -derived Her2 and IL13Ra2 CAR T KO CAR T cells will then be chronically stimulated using in vitro assays to assess proliferation, anti-tumor cytotoxicity, and cytokine expression. Furthermore, DNA will be extracted from and bisulfite-converted for WGBS methylation profiling. MPI (23) will be used to determine the multipotency score of the CAR T cells. A multivariate linear regression model will be used to model the relationship between CAR T cell expansion and the multipotency’ score. Specifically, expansion is the dependent variable, multipotency score and other features such as tumor burden are explanatory' variables. The MPI score and expansion of CH-associated gene(s), e.g., MBD6 or MBD5&6, disrupted CAR T cells will be isolated from naive and memory CD8 T cell subsets.

[0430] Further approaches to examining the heterogeneity of CAR T cells generated from the naive and memory' T cell subsets will include examination of the TCR repertoire and single cell ATAC-seq. MBD6 or MBD5&6 KO CAR T cells will be adoptively transferred into NOD- SCID IL2Rynull (NSG) mice and antigen-independent proliferation anti-tumor response will be assessed in an in vivo setting. Practical application of these results includes clinical trials.Attorney Docket No: 243734.000222Example 5. Identification of MBD6 or MBD5&6 mutation-induced antigen-independent cell proliferation in human T cells,

[0431] To identify whether MBD6 or MBD5&6 mutations induce antigen-independent cell proliferation in human T cells, MBD6 or MBD5&6 KO CAR T cells will be cultured in the presence and absence of antigen and monitored longitudinally for antigen-independent proliferation. To assess for antigen-independent homeostasis, the cells will be cultured in the presence of IL7 and IL 15.Example 6. Effect of MBD6 on T cell exhaustion

[0432] In addition, to assess whether MBD6 or MBD5&6 KO CAR T cells could overcome T cell exhaustion, a stimulation assay including continuous weekly antigen stimulation to induce T cell exhaustion ex vivo will be employed. Under these conditions, the ability of MBD6 or MBD5&6 KO CAR T cells to resist and overcome T cell exhaustion program and maintain survival will be tested.Example 7. Disruption of MBD6 in human T cells

[0433] To study the effect of MBD6 disruption in human T cells, BV173 (B cell precursor ALL) cells will be obtained from the German Collection of Microorganisms and Cell Cultures and maintained in RPMI 1640 with 10% FBS and 2 mM GlutaMAX. BV173 cells will be modified to express yellow fluorescent protein (YFP).

[0434] Generation of MBD6 KO CAR T cells: This study will be conducted with approval from the Institutional Review Board. Peripheral blood mononuclear cells (PBMCs) will be isolated from consented healthy donors by density gradient separation using Lymphoprep™ (STEMCELL Technologies, Vancouver, BC). Cells will then be plated in 24- well non-tissue culture-treated plates precoated with 2ug / ml each of anti-CD3 and anti-CD28 monoclonal antibodies. The culture medium for initial stimulation will be RPMI 1640 supplemented with 10% FBS and 2 mM GlutaMAX™ IL-7 and IL- 15 will be added at 10 ng / ml. The next day, cells will be transduced with lentiviral vectors for CD 19 CAR T structure and electroporated with Cas9-sgRNA RNP complexes targeting MBD6 (SEQ ID NO: 182- 184). RNPs will be precomplexed at an sgRNA: Cas9 ratio of 4.5: 1. which will be prepared by adding 1.5pl of lOOpM sgRNA to 1 pl of 40 pM Cas9. For gene KO, 106T cells will be resuspended in 20 pl of R buffer and added to RNP. Resuspended cells will be electroporatedAttorney Docket No: 243734.000222 with Lonza electroporation system using EH-115 program. After electroporation, the cells will be cultured in 48-well tissue culture-treated plate containing RPMI 1640 supplemented with 20% FBS, GlutaMAX™, IL-7 (10 ng / ml), and IL-15 (5 ng / ml) for 72 hours.

[0435] Mouse tumor xenograft models: All animal experiments will be performed on protocols approved by the Institutional Animal Care and Use Committee. Eight- to ten-week- old male and female mice will be used in both the glioma and osteosarcoma models. For the BV173 B-Cell acute lymphoblastic leukemia (B-ALL) xenograft model. 3 x io6BV173 cells will be injected intravenously on day 0. CD19 CAR T cells (2 x 106) will be injected intravenously on day 7. For each model, CAR T cells will be generated from a different healthy donor. Tumor burden will be assessed weekly using bioluminescent in vivo imaging system (IVIS). Quantification of tumor burden will be performed using Living Image software (PerkinElmer). Lower tumor burden is expected in animals injected with MBD6 KO CAR T cells compared to control animals.

[0436] Repeated stimulation assay: Control and MBD6 KO CAR T cells will be cocultured with BV173 cells at an E:T ratio of 2: 1 in the presence of IL-15 / IL-7 (10 ng / ml). Seven days later, T cells will be counted and replaced with fresh tumor cells at the same 2: 1 ratio in the presence of IL-15 / IL-7 (10 ng / ml). The T cells will be counted and stimulated with fresh tumor cells on a weekly basis until the killing of tumor cells by the T cells, stops. MBD6 KO CAR T cells are expected to show more prolonged tumor cell killing compared to control CAR T cellsReferences1. Zebley CC, Gottschalk S, Youngblood B. Rewriting History: Epigenetic Reprogramming of CD8(+) T Cell Differentiation to Enhance Immunotherapy. Trends Immunol. 2020;41(8):665-75.2. Ghoneim HE, Fan Y, Moustaki A, Abdelsamed HA, Dash P, Dogra P, et al. De Novo Epigenetic Programs Inhibit PD-1 Blockade-Mediated T Cell Rejuvenation. Cell. 2017;170(l): 142-57 el9.3. Prinzing B. Zebley CC. Petersen CT. Fan Y, Anido AA, Yi Z, et al. Deleting DNMT3A in CAR T cells prevents exhaustion and enhances antitumor activity. Sci Transl Med. 2021;13(620):eabh0272.4. Abdelsamed HA, Moustaki A, Fan Y, Dogra P, Ghoneim HE, Zebley CC, et al. Human memory CD8 T cell effector potential is epigenetically preserved during in vivo homeostasis. The Journal of experimental medicine. 2017:214(6): 1593-606.Attorney Docket No: 243734.0002225. Flynn JK, Gorry PR. Stem memory' T cells (TSCM)-their role in cancer and HIV immunotherapies. Clin Transl Immunology. 2014;3(7):e20.6. Gattinoni L, Lugli E, Ji Y, Pos Z, Paulos CM, Quigley MF, et al. A human memory T cell subset with stem cell-like properties. Nat Med. 2011 ; 17(10): 1290-7.7. Sabatino M, Hu J, Sommariva M, Gautam S, Fellowes V, Hocker JD, et al. Generation of clinical -grade CD19-specific CAR-modified CD8+ memory stem cells for the treatment of human B-cell malignancies. Blood. 2016;128(4):519-28.8. Klebanoff CA, Gattinoni L, Restifo NP. Sorting through subsets: which T-cell populations mediate highly effective adoptive immunotherapy? J Immunother. 2012;35(9):651-60.9. Kurtulus S. Madi A, Escobar G, Klapholz M, Nyman J. Christian E, et al. Checkpoint Blockade Immunotherapy Induces Dynamic Changes in PD-1(-)CD8(+) Tumor-Infiltrating T Cells. Immunity. 2019;50(l): 181-94 e6.10. Krishna S, Lowery FJ, Copeland AR, Bahadiroglu E, Mukhepee R, Jia L, et al. Stemlike CD8 T cells mediate response of adoptive cell immunotherapy against human cancer. Science. 2020:370(6522): 1328-34.1 1. Zebley CC, Brown C, Mi T, Fan Y, Alli S, Boi S, et al. CD19-CAR T cells undergo exhaustion DNA methylation programming in patients with acute lymphoblastic leukemia. Cell Rep. 2021;37(9): 110079.12. Reik W. Stability and flexibility of epigenetic gene regulation in mammalian development. Nature. 2007;447(7143):425-32.13. Abdel -Hakeem MS, Manne S, Beltra JC, Stelekati E, Chen Z, Nzingha K, et al. Epigenetic scarring of exhausted T cells hinders memory' differentiation upon eliminating chronic antigenic stimulation. Nat Immunol. 202I;22(8): 1008-19.14. Zebley CC, Abdelsamed HA, Ghoneim HE, Alli S, Brown C, Haydar D, et al. Proinflammatory cytokines promote TET2-mediated DNA demethylation during CD8 T cell effector differentiation. Cell Rep. 2021;37(2): 109796.15. Hudson WH, Gensheimer J, Hashimoto M, Wieland A, Valanparambil RM, Li P, et al. Proliferating Transitory T Cells with an Effector-like Transcriptional Signature Emerge from PD-1(+) Stem-like CD8(+) T Cells during Chronic Infection. Immunity. 2019:51(6): 1043-58 e4.16. Im SJ, Hashimoto M, Gemer MY, Lee J, Kissick HT, Burger MC, et al. Defining CD8+ T cells that provide the proliferative burst after PD-1 therapy. Nature. 2016:537(7620):417-21.Attorney Docket No: 243734.00022217. D. Zehn, R. Thimme, E. Lugli, G.P. de Almeida, A. Oxenius, ‘Stem-like' precursors are the fount to sustain persistent CD8+ T cell responses. Nature Immunology 23, 836-847 (2022).* * *

[0437] The present invention is not to be limited in scope by the specific embodiments described herein. Indeed, various modifications of the invention in addition to those described herein will become apparent to those skilled in the art from the foregoing description. Such modifications are intended to fall within the scope of the appended claims.

[0438] All patents, applications, publications, test methods, literature, and other materials cited herein are hereby incorporated by reference in their entirety as if physically present in this specification.Atorney Docket No: 243734.000222Listing of SequencesSEO ID NO: 1 scFvFRP5 + leader amino acid sequenceMDWIWRILFLVGAATGAHSEVQLQQSGPELKKPGETVKISCKASGYPFTNYG MNWVKQAPGQGLKWMGWINTSTGESTFADDFKGRFDFSLETSANTAYLQINNLKS EDMATYFCARWEVYHGYVPYWGQGTTVTVSSGGGGSGGGGSGGGGSDIQLTQSH KFLSTSVGDRVSITCKASQDVYNAVAWYQQKPGQSPKLLIYSASSRYTGVPSRFTGS GSGPDFTFTISSVQAEDLAVYFCQQHFRTPFTFGSGTKLEIKALSEQ ID NO: 2 scFvFRP5 + leader DNA sequenceATGGACTGGATCTGGCGCATCCTGTTTCTCGTGGGAGCCGCCACAGGCGCCCATT CTGAGGTACAACTGCAGCAGTCTGGACCTGAACTGAAGAAGCCTGGAGAGACAG TCAAGATCTCCTGCAAGGCCTCTGGGTATCCTTTCACAAACTATGGAATGAACTG GGTGAAGCAGGCTCCAGGACAGGGTTTAAAGTGGATGGGCTGGATTAACACCTC CACTGGAGAGTCAACATTTGCTGATGACTTCAAGGGACGGTTTGACTTCTCTTTG GAAACCTCTGCCAACACTGCCTATTTGCAGATCAACAACCTCAAAAGTGAAGAC ATGGCTACATATTTCTGTGCAAGATGGGAGGTTTACCACGGCTACGTTCCTTACT GGGGCCAAGGGACCACGGTCACCGTTTCCTCTGGCGGTGGCGGTTCTGGTGGCG GTGGCTCCGGCGGTGGCGGTTCTGACATCCAGCTGACCCAGTCTCACAAATTCCT GTCCACTTCAGTAGGAGACAGGGTCAGCATCACCTGCAAGGCCAGTCAGGATGT GTATAATGCTGTTGCCTGGTATCAACAGAAACCAGGACAATCTCCTAAACTTCTG ATTTACTCGGCATCCTCCCGGTACACTGGAGTCCCTTCTCGCTTCACTGGCAGTG GCTCTGGGCCGGATTTCACTTTCACCATCAGCAGTGTGCAGGCTGAAGACCTGGC AGTTTATTTCTGTCAGCAACATTTTCGTACTCCATTCACGTTCGGCTCGGGGACAA AATTGGAGATCAAAGCTCTASEQ ID NO: 3 FRP5.zeta CAR amino acid sequenceMDWIWRILFLVGAATGAHSEVQLQQSGPELKKPGETVKISCKASGYPFTNYGMNWV KQAPGQGLKWMGW1NTSTGESTFADDFKGRFDFSLETSANTAYLQINNLKSEDMAT YFCARWEVYHGYVPYWGQGTTVTVSSGGGGSGGGGSGGGGSDIQLTQSHKFLSTS VGDRVSITCKASQDVYNAVAWYQQKPGQSPKLLIYSASSRYTGVPSRFTGSGSGPDF TFTISSVQAEDLAVYFCQQHFRTPFTFGSGTKLEIKALDLEPKSCDKTHTCPPCPDPKLCYLLDGILFIYGVILTALFLRVKFSRSADAPAYQQGQNQLYNELNLGRREEYDVLDK RRGRDPEMGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQ GLSTATKDTYDALHMQALPPRSEQ ID NO: 4 FRP5. zeta CAR DNA sequenceATGGACTGGATCTGGCGCATCCTGTTTCTCGTGGGAGCCGCCACAGGCGCCCATT CTGAGGTACAACTGCAGCAGTCTGGACCTGAACTGAAGAAGCCTGGAGAGACAG TCAAGATCTCCTGCAAGGCCTCTGGGTATCCTTTCACAAACTATGGAATGAACTG GGTGAAGCAGGCTCCAGGACAGGGTTTAAAGTGGATGGGCTGGATTAACACCTC CACTGGAGAGTCAACATTTGCTGATGACTTCAAGGGACGGTTTGACTTCTCTTTG GAAACCTCTGCCAACACTGCCTATTTGCAGATCAACAACCTCAAAAGTGAAGAC ATGGCTACATATTTCTGTGCAAGATGGGAGGTTTACCACGGCTACGTTCCTTACT GGGGCCAAGGGACCACGGTCACCGTTTCCTCTGGCGGTGGCGGTTCTGGTGGCG GTGGCTCCGGCGGTGGCGGTTCTGACATCCAGCTGACCCAGTCTCACAAATTCCT GTCCACTTCAGTAGGAGACAGGGTCAGCATCACCTGCAAGGCCAGTCAGGATGT GTATAATGCTGTTGCCTGGTATCAACAGAAACCAGGACAATCTCCTAAACTTCTG ATTTACTCGGCATCCTCCCGGTACACTGGAGTCCCTTCTCGCTTCACTGGCAGTG GCTCTGGGCCGGATTTCACTTTCACCATCAGCAGTGTGCAGGCTGAAGACCTGGCAttorney Docket No: 243734.000222AGTTTATTTCTGTCAGCAACATTTTCGTACTCCATTCACGTTCGGCTCGGGGACAA AATTGGAGATCAAAGCTCTAGATCTCGAGCCCAAATCTTGTGACAAAACTCACA CATGCCCACCGTGCCCGGATCCCAAACTCTGCTACCTGCTGGATGGAATCCTCTT CATCTATGGTGTCATTCTCACTGCCTTGTTCCTGAGAGTGAAGTTCAGCAGGAGC GCAGACGCCCCCGCGTACCAGCAGGGCCAGAACCAGCTCTATAACGAGCTCAAT CTAGGACGAAGAGAGGAGTACGATGTTTTGGACAAGAGACGTGGCCGGGACCCT GAGATGGGGGGAAAGCCGAGAAGGAAGAACCCTCAGGAAGGCCTGTACAATGA ACTGCAGAAAGATAAGATGGCGGAGGCCTACAGTGAGATTGGGATGAAAGGCG AGCGCCGGAGGGGCAAGGGGCACGATGGCCTTTACCAGGGTCTCAGTACAGCCA CCAAGGACACCTACGACGCCCTTCACATGCAGGCCCTGCCCCCTCGCSEQ ID NO: 5 FRP5.CD28.zeta CAR amino acid sequenceMDWIWRILFLVGAATGAHSEVQLQQSGPELKKPGETVKISCKASGYPFTNYGMNWV KQAPGQGLKWMGWINTSTGESTFADDFKGRFDFSLETSANTAYLQINNLKSEDMAT YFCARWEVYHGYVPYWGQGTTVTVSSGGGGSGGGGSGGGGSDIQLTQSHKFLSTS VGDRVSITCKASQDVYNAVAWYQQKPGQSPKLLIYSASSRYTGVPSRFTGSGSGPDF TFTISSVQAEDLAVYFCQQHFRTPFTFGSGTKLEIKALDLEPKSCDKTHTCPPCPDPKF WVLVVVGGVLACYSLLVTVAFIIFWVRSKRSRLLHSDYMNMTPRRPGPTRKHYQPY APPRDFAAYRSRVKFSRSADAPAYQQGQNQLYNELNLGRREEYDVLDKRRGRDPE MGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQGLSTATKDTYDALHMQALPPRSEQ ID NO: 6 FRP5.CD28.zeta CAR DNA sequenceATGGACTGGATCTGGCGCATCCTGTTTCTCGTGGGAGCCGCCACAGGCGCCCATT CTGAGGTACAACTGCAGCAGTCTGGACCTGAACTGAAGAAGCCTGGAGAGACAG TCAAGATCTCCTGCAAGGCCTCTGGGTATCCTTTCACAAACTATGGAATGAACTG GGTGAAGCAGGCTCCAGGACAGGGTTTAAAGTGGATGGGCTGGATTAACACCTC CACTGGAGAGTCAACATTTGCTGATGACTTCAAGGGACGGTTTGACTTCTCTTTG GAAACCTCTGCCAACACTGCCTATTTGCAGATCAACAACCTCAAAAGTGAAGAC ATGGCTACATATTTCTGTGCAAGATGGGAGGTTTACCACGGCTACGTTCCTTACT GGGGCCAAGGGACCACGGTCACCGTTTCCTCTGGCGGTGGCGGTTCTGGTGGCG GTGGCTCCGGCGGTGGCGGTTCTGACATCCAGCTGACCCAGTCTCACAAATTCCT GTCCACTTCAGTAGGAGACAGGGTCAGCATCACCTGCAAGGCCAGTCAGGATGT GTATAATGCTGTTGCCTGGTATCAACAGAAACCAGGACAATCTCCTAAACTTCTG ATTTACTCGGCATCCTCCCGGTACACTGGAGTCCCTTCTCGCTTCACTGGCAGTG GCTCTGGGCCGGATTTCACTTTCACCATCAGCAGTGTGCAGGCTGAAGACCTGGC AGTTTATTTCTGTCAGCAACATTTTCGTACTCCATTCACGTTCGGCTCGGGGACAA AATTGGAGATCAAAGCTCTAGATCTCGAGCCCAAATCTTGTGACAAAACTCACA CATGCCCACCGTGCCCGGATCCCAAATTTTGGGTGCTGGTGGTGGTTGGTGGAGT CCTGGCTTGCTATAGCTTGCTAGTAACAGTGGCCTTTATTATTTTCTGGGTGAGGA GTAAGAGGAGCAGGCTCCTGCACAGTGACTACATGAACATGACTCCCCGCCGCCCCGGGCCCACCCGCAAGCATTACCAGCCCTATGCCCCACCACGCGACTTCGCAGC CTATCGCTCCAGAGTGAAGTTCAGCAGGAGCGCAGACGCCCCCGCGTACCAGCA GGGC C AGAAC C AGCTCT AT AAC GAGCTC A ATCT AGGAC GAAGAGAGGAGT AC GA TGTTTTGGACAAGAGACGTGGCCGGGACCCTGAGATGGGGGGAAAGCCGAGAA GGAAGAACCCTCAGGAAGGCCTGTACAATGAACTGCAGAAAGATAAGATGGCG GAGGCCTACAGTGAGATTGGGATGAAAGGCGAGCGCCGGAGGGGCAAGGGGCA CGATGGCCTTTACCAGGGTCTCAGTACAGCCACCAAGGACACCTACGACGCCCTT CACATGCAGGCCCTGCCCCCTCGCAtorney Docket No: 243734.000222SEO ID NO: 7 scFv47 + leader amino acid sequenceMDWIWRILFLVGAATGAHSQVQLQQPGAELVRPGASVKLSCKASGYTFSNYLMNWVKQRPEQDLDWIGRIDPYDGDIDYNQNFKDKAILTVDKSSSTAYMQLSSLTSEDSAVYYCARGYGTAYGVDYWGQGTSVTVSSAKTTPPKLEEGEFSEARVDIVLTQSPASLAVSLGQRATISCRASESVDNYGISFMNWFQQKPGQPPKLLIYAASRQGSGVPARFSGS GSGTDFSLNIHPMEEDDTAMYFCQQSKEVPWTFGGGTKLEIKSEQ ID NO: 8 scFv47 + leader DNA sequenceATGGACTGGATCTGGCGCATCCTGTTTCTCGTGGGAGCCGCCACAGGCGCCCATT CTCAGGTGCAGCTGCAGCAGCCTGGCGCTGAACTCGTGCGGCCAGGCGCTTCTGT GAAGCTGAGCTGTAAAGCCAGCGGCTACACCTTCAGCAACTACCTGATGAACTG GGTCAAGCAGCGGCCCGAGCAGGACCTGGATTGGATCGGCAGAATCGACCCCTACGACGGCGACATCGACTACAACCAGAACTTCAAGGACAAGGCCATCCTGACCGT GGACAAGAGCAGCAGCACCGCCTACATGCAGCTGTCCAGCCTGACCAGCGAGGA CAGCGCCGTGTACTACTGCGCCAGAGGCTACGGCACAGCCTACGGCGTGGACTA TTGGGGCCAGGGCACAAGCGTGACCGTGTCCAGCGCCAAGACCACCCCCCCTAAGCTGGAAGAGGGCGAGTTCTCCGAGGCCCGGGTGGACATTGTGCTGACACAGTCTCCAGCCAGCCTGGCCGTGTCCCTGGGACAGAGAGCCACCATCAGCTGTAGGGC CAGCGAGAGCGTGGACAACTACGGCATCAGCTTCATGAATTGGTTCCAGCAGAA GCCCGGCCAGCCCCCCAAGCTGCTGATCTATGCCGCCAGCAGACAGGGCAGCGG AGTGCCTGCCAGATTTTCTGGCAGCGGCTCCGGCACCGACTTCAGCCTGAACATCCACCCTATGGAAGAGGACGACACCGCCATGTACTTTTGCCAGCAGAGCAAAGAG GTGCCCTGGACCTTTGGCGGAGGCACCAAGCTGGAAATCAAGSEQ ID NO: 9 scFv47.SFl.CD28. zeta CAR amino acid sequenceMDWIWRILFLVGAATGAHSQVQLQQPGAELVRPGASVKLSCKASGYTFSNYLMNWVKQRPEQDLDWIGRIDPYDGDIDYNQNFKDKAILTVDKSSSTAYMQLSSLTSEDSAVYYCARGYGTAYGVDYWGQGTSVTVSSAKTTPPKLEEGEFSEARVDIVLTQSPASLAVSLGQRATISCRASESVDNYGISFMNWFQQKPGQPPKLLIYAASRQGSGVPARFSGSGSGTDFSLNIHPMEEDDTAMYFCQQSKEVPWTFGGGTKLEIKDLEPKSCDKTHTCPPCPDPKFWVLVVVGGVLACYSLLVTVAFIIFWVRSKRSRLLHSDYMNMTPRRPGPTRKHYQPYAPPRDFAAYRSRVKFSRSADAPAYQQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGKPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQG LSTATKDTYDALHMQALPPRSEQ ID NO: 10 scFv47.SH.CD28.zeta CAR DNA sequenceATGGACTGGATCTGGCGCATCCTGTTTCTCGTGGGAGCCGCCACAGGCGCCCATT CTCAGGTGCAGCTGCAGCAGCCTGGCGCTGAACTCGTGCGGCCAGGCGCTTCTGT GAAGCTGAGCTGTAAAGCCAGCGGCTACACCTTCAGCAACTACCTGATGAACTG GGTCAAGCAGCGGCCCGAGCAGGACCTGGATTGGATCGGCAGAATCGACCCCTACGACGGCGACATCGACTACAACCAGAACTTCAAGGACAAGGCCATCCTGACCGT GGACAAGAGCAGCAGCACCGCCTACATGCAGCTGTCCAGCCTGACCAGCGAGGA CAGCGCCGTGTACTACTGCGCCAGAGGCTACGGCACAGCCTACGGCGTGGACTA TTGGGGCCAGGGCACAAGCGTGACCGTGTCCAGCGCCAAGACCACCCCCCCTAAGCTGGAAGAGGGCGAGTTCTCCGAGGCCCGGGTGGACATTGTGCTGACACAGTCTCCAGCCAGCCTGGCCGTGTCCCTGGGACAGAGAGCCACCATCAGCTGTAGGGC CAGCGAGAGCGTGGACAACTACGGCATCAGCTTCATGAATTGGTTCCAGCAGAA GCCCGGCCAGCCCCCCAAGCTGCTGATCTATGCCGCCAGCAGACAGGGCAGCGG AGTGCCTGCCAGATTTTCTGGCAGCGGCTCCGGCACCGACTTCAGCCTGAACATCCACCCTATGGAAGAGGACGACACCGCCATGTACTTTTGCCAGCAGAGCAAAGAGAtorney Docket No: 243734.000222GTGCCCTGGACCTTTGGCGGAGGCACCAAGCTGGAAATCAAGGATCTCGAGCCC AAATCTTGTGACAAAACTCACACATGCCCACCGTGCCCGGATCCCAAATTTTGGG TGCTGGTGGTGGTTGGTGGAGTCCTGGCTTGCTATAGCTTGCTAGTAACAGTGGCCTTTATTATTTTCTGGGTGAGGAGTAAGAGGAGCAGGCTCCTGCACAGTGACTAC ATGAACATGACTCCCCGCCGCCCCGGGCCCACCCGCAAGCATTACCAGCCCTATG CCCCACCACGCGACTTCGCAGCCTATCGCTCCAGAGTGAAGTTCAGCAGGAGCG CAGACGCCCCCGCGTACCAGCAGGGCCAGAACCAGCTCTATAACGAGCTCAATC TAGGACGAAGAGAGGAGTACGATGTTTTGGACAAGAGACGTGGCCGGGACCCTG AGATGGGGGGAAAGCCGAGAAGGAAGAACCCTCAGGAAGGCCTGTACAATGAACTGCAGAAAGATAAGATGGCGGAGGCCTACAGTGAGATTGGGATGAAAGGCGA GCGCCGGAGGGGCAAGGGGCACGATGGCCTTTACCAGGGTCTCAGTACAGCCAC CAAGGACACCTACGACGCCCTTCACATGCAGGCCCTGCCCCCTCGCSEQ ID NO: 11 scFv47.SH.delta CAR amino acid sequenceMDWIWRILFLVGAATGAHSQVQLQQPGAELVRPGASVKLSCKASGYTFSNYLMNW VKQRPEQDLDWIGRIDPYDGDIDYNQNFKDKAILTVDKSSSTAYMQLSSLTSEDSAV YYCARGYGTAYGVDYWGQGTSVTVSSAKTTPPKLEEGEFSEARVDIVLTQSPASLA VSLGQRATISCRASESVDNYGISFMNWFQQKPGQPPKLLIYAASRQGSGVPARFSGS GSGTDFSLNIHPMEEDDTAMYFCQQSKEVPWTFGGGTKLEIKDLEPKSCDKTHTCPP CPDPKFWVLVVVGGVLACYSLLVTVAFIIFWVRSKRSRLLHSEQ ID NO: 12 scFv47. SH. delta CAR DNA sequenceATGGACTGGATCTGGCGCATCCTGTTTCTCGTGGGAGCCGCCACAGGCGCCCATT CTCAGGTGCAGCTGCAGCAGCCTGGCGCTGAACTCGTGCGGCCAGGCGCTTCTGT GAAGCTGAGCTGTAAAGCCAGCGGCTACACCTTCAGCAACTACCTGATGAACTG GGTCAAGCAGCGGCCCGAGCAGGACCTGGATTGGATCGGCAGAATCGACCCCTA CGACGGCGACATCGACTACAACCAGAACTTCAAGGACAAGGCCATCCTGACCGT GGACAAGAGCAGCAGCACCGCCTACATGCAGCTGTCCAGCCTGACCAGCGAGGACAGCGCCGTGTACTACTGCGCCAGAGGCTACGGCACAGCCTACGGCGTGGACTA TTGGGGCCAGGGCACAAGCGTGACCGTGTCCAGCGCCAAGACCACCCCCCCTAA GCTGGAAGAGGGCGAGTTCTCCGAGGCCCGGGTGGACATTGTGCTGACACAGTC TCCAGCCAGCCTGGCCGTGTCCCTGGGACAGAGAGCCACCATCAGCTGTAGGGC CAGCGAGAGCGTGGACAACTACGGCATCAGCTTCATGAATTGGTTCCAGCAGAA GCCCGGCCAGCCCCCCAAGCTGCTGATCTATGCCGCCAGCAGACAGGGCAGCGGAGTGCCTGCCAGATTTTCTGGCAGCGGCTCCGGCACCGACTTCAGCCTGAACATC CACCCTATGGAAGAGGACGACACCGCCATGTACTTTTGCCAGCAGAGCAAAGAG GTGCCCTGGACCTTTGGCGGAGGCACCAAGCTGGAAATCAAGGATCTCGAGCCC AAATCTTGTGACAAAACTCACACATGCCCACCGTGCCCGGATCCCAAATTTTGGG TGCTGGTGGTGGTTGGTGGAGTCCTGGCTTGCTATAGCTTGCTAGTAACAGTGGC CTTTATTATTTTCTGGGTGAGGAGTAAGAGGAGCAGGCTCCTGCACSEQ ID NO: 13 4H5.CD28.z.2A.tCD19 amino acid sequenceMDWIWRILFLVGAATGAHSQVQLLESGGGLVQPGGSLRLSCAASGFTFSSYTMSWV RQAPGQALEWMGTISSGGTYTYYPDSVKGRFTISRDNAKNSLYLQMNSLRAEDTAV YYCAREAIFTYWGRGTLVTSSGGGGSGGGGSGGGGSDIQLTQSPSSLSASVGDRVTITCKASQDINNYLSWYQQKPGQAPRLLIYRANRLVDGVPDRFSGSGYGTDFTLTINNI ESEDAAYYFCLKYDVFPYTFGQGTKVEIKDLEPKSCDKTHTCPPCPDPKFWVLVVVG GVLACYSLLVTVAFIIFWVRSKRSRLLHSDYMNMTPRRPGPTRKHYQPYAPPRDFAAYRSRVKFSRSADAPAYQQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGKPRRK NPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLYQGLSTATKDTYDALHMAtorney Docket No: 243734.000222QALPPRASRAEGRGSLLTCGDVEENPGPMPPPRLLFFLLFLTPMEVRPEEPLVVKVEEGDNAVLQCLKGTSDGPTQQLTWSRESPLKPFLKLSLGLPGLGIHMRPLAIWLFIFNVSQQMGGFYLCQPGPPSEKAWQPGWTVNVEGSGELFRWNVSDLGGLGCGLKNRSSEGPSSPSGKLMSPKLYVWAKDRPEIWEGEPPCLPPRDSLNQSLSQDLTMAPGSTLWLSCGVPPDSVSRGPLSWTHVHPKGPKSLLSLELKDDRPARDMWVMETGLLLPRATAQDAGKYYCHRGNLTMSFHLEITARPVLWHWLLRTGGWKVSAVTLAYLIFCLCSLVGILHLQRALVLRRKRKRMTDPTRRFSEP ID NO: 14 4H5.CD28.z.2A.tCD19 DNA sequenceATGGACTGGATCTGGCGGATTCTGTTCCTCGTGGGAGCCGCCACAGGCGCTCACTCACAGGTGCAGCTGCTGGAATCTGGCGGCGGACTGGTGCAGCCTGGCGGCAGCCTGAGACTGAGCTGCGCCGCCAGCGGCTTCACCTTCAGCAGCTACACCATGAGCTGGGTCCGGCAGGCTCCTGGACAGGCCCTGGAATGGATGGGCACCATCAGCAGCGGCGGCACCTACACCTACTACCCCGACAGCGTGAAGGGCCGGTTCACCATCAGCCGGGACAACGCCAAGAACAGCCTGTACCTGCAGATGAACAGCCTGAGAGCCGAGGACACAGCCGTGTACTACTGCGCCAGAGAGGCCATCTTCACCTACTGGGGCAGAGGCACCCTGGTCACAAGCAGCGGAGGCGGAGGAAGTGGAGGGGGAGGATCAGGCGGCGGAGGCAGCGATATCCAGCTGACCCAGAGCCCTAGCAGCCTGAGCGCCAGCGTGGGCGACAGAGTGACCATCACATGCAAGGCCAGCCAGGACATCAACAACTACCTGAGCTGGTATCAGCAGAAGCCCGGCCAGGCCCCCAGACTGCTGATCTACCGGGCCAACAGACTGGTGGACGGCGTGCCCGATAGATTCAGCGGCAGCGGCTACGGCACCGACTTCACCCTGACCATCAACAACATCGAGTCCGAGGACGCCGCCTACTACTTCTGCCTGAAGTACGACGTGTTCCCCTACACCTTCGGCCAGGGCACCAAGGTGGAGATCAAGGATCTCGAGCCCAAATCTTGTGACAAAACTCACACATGCCCACCGTGCCCGGATCCCAAGTTCTGGGTGCTGGTGGTCGTGGGCGGAGTGCTGGCCTGTTACAGCCTGCTCGTGACCGTGGCCTTCATCATCTTTTGGGTGCGCAGCAAGCGGAGCCGGCTGCTGCACAGCGACTACATGAACATGACCCCCAGACGGCCTGGCCCCACCAGAAAGCACTACCAGCCTTACGCCCCTCCCAGAGACTTCGCCGCCTACCGGTCCAGAGTGAAGTTCAGCAGAAGCGCCGACGCCCCTGCCTATCAGCAGGGCCAGAACCAGCTGTACAACGAGCTGAACCTGGGCAGACGGGAAGAGTACGACGTGCTGGACAAGCGGAGAGGCAGGGACCCTGAGATGGGCGGCAAGCCCAGAAGAAAGAACCCCCAGGAAGGCCTGTATAACGAACTGCAGAAAGACAAGATGGCCGAGGCCTACAGCGAGATCGGCATGAAGGGCGAGCGGAGAAGAGGCAAGGGCCACGATGGCCTGTACCAGGGACTGAGCACCGCCACCAAGGACACCTACGACGCCCTGCACATGCAGGCCCTGCCTCCAAGAGCCTCTAGAGCCGAGGGCAGAGGCAGCCTGCTGACATGTGGCGACGTGGAAGAGAACCCAGGCCCCATGCCTCCCCCCAGACTGCTGTTCTTCCTGCTGTTCCTGACCCCTATGGAAGTGCGGCCCGAGGAACCCCTGGTCGTGAAAGTGGAAGAGGGCGACAACGCCGTGCTGCAGTGTCTGAAGGGCACCTCCGATGGCCCTACCCAGCAGCTGACCTGGTCCAGAGAGAGCCCCCTGAAGCCCTTCCTGAAGCTGTCTCTGGGCCTGCCTGGCCTGGGCATCCATATGAGGCCACTGGCCATCTGGCTGTTCATCTTCAACGTGTCCCAGCAGATGGGAGGCTTCTACCTGTGCCAGCCTGGCCCACCTTCTGAGAAGGCTTGGCAGCCTGGCTGGACCGTGAACGTGGAAGGATCTGGCGAGCTGTTCCGGTGGAACGTGTCCGATCTGGGCGGCCTGGGATGCGGCCTGAAGAACAGATCTAGCGAGGGCCCCAGCAGCCCCAGCGGCAAACTGATGAGCCCCAAGCTGTACGTGTGGGCCAAGGACAGACCCGAGATTTGGGAGGGCGAGCCCCCTTGCCTGCCCCCTAGAGATAGCCTGAACCAGAGCCTGAGCCAGGACCTGACAATGGCCCCTGGCAGCACACTGTGGCTGAGCTGTGGCGTGCCACCCGACTCTGTGTCTAGAGGCCCTCTGAGCTGGACCCACGTGCACCCTAAGGGCCCTAAGAGCCTGCTGTCCCTGGAACTGAAGGACGACAGGCCCGCCAGAGATATGTGGGTCATGGAAACCGGCCTGCTGCTGCCTAGAGCCACAGCCCAGGATGCCGGCAAGTACTACTGCCACAG...

Claims

Attorney Docket No: 243734.000222Claims1. A modified immune effector cell, wherein a Methyl-CpG Binding Domain Protein 6 (MBD6) gene or gene product is modified in the immune effector cell so that the expression and / or function of MBD6 in the immune effector cell is reduced or eliminated.

2. The modified immune effector cell of claim 1, wherein the level of functional MBD6 protein in the immune effector cell is reduced by 50% or more.

3. The modified immune effector cell of claim 1, wherein the MBD6 gene is deleted so that no detectable functional MBD6 protein is produced.

4. The modified immune effector cell of any one of claims 1-3, wherein the immune effector cell is a T cell.

5. The modified immune effector cell of claim 4, wherein the T cell is selected from a CD8+ T cell, a CD4+ T cell, a cytotoxic T cell, an a T cell, a natural killer T (NKT) cell, a y8 T cell, a memory T cell, a T-helper cell, and a regulatory T cell (Treg).

6. The modified immune effector cell of any one of claims 1-3, wherein the immune effector cell is a stem cell that is capable of differentiating into an immune cell.

7. The modified immune effector cell of claim 6, wherein the stem cell is an induced pluripotent stem cell (iPSC).

8. The modified immune effector cell of any one of claims 1-3, wherein the immune effector cell is a natural killer (NK) cell.

9. The modified immune effector cell of any one of claims 1-8, wherein the modified immune effector cell further comprises at least one surface molecule capable of binding specifically to an antigen.Attorney Docket No: 243734.00022210. The modified immune effector cell of claim 9, wherein the antigen is selected from a tumor antigen, a viral antigen, a bacterial antigen, a fungal antigen, a parasite antigen, a prion antigen, and an antigen associated with an inflammation or an autoimmune disease.

11. The modified immune effector cell of claim 10, wherein the tumor antigen is B-cell maturation antigen (BCMA) human epidermal growth factor receptor 2 (HER2), IL13Ra2, erythropoietin-producing human hepatocellular receptor A2 (EphA2). B7 homolog 3 protein (B7-H3), Cluster of Differentiation (CD) 19 (CD19), CD22, or CD123.

12. The modified immune effector cell of claim 10, wherein the viral antigen is gpl20.

13. The modified immune effector cell of any one of claims 1-12, wherein the modified immune effector cell further comprises a chimeric antigen receptor (CAR), an antigen specific T-cell receptor, or a bispecific antibody.

14. The modified immune effector cell of claim 13, wherein the modified immune effector cell further comprises a CAR.

15. The modified immune effector cell of claim 14. wherein the CAR comprises (i) an extracellular antigen-binding domain, (ii) a transmembrane domain, and (iii) a cytoplasmic domain.

16. The modified immune effector cell of claim 15. wherein the extracellular antigen-binding domain comprises an antibody or an antibody fragment.

17. The modified immune effector cell of claim 16, wherein the extracellular antigen-binding domain comprises an scFv capable of binding to BCMA, HER2. IL13Ra2, EphA2, B7-H3, CD 19, CD22, CD 123, or gpl20.

18. The modified immune effector cell of any one of claims 15-17, wherein the extracellular antigen-binding domain further comprises a leader sequence.

19. The modified immune effector cell of any one of claims 15-18, wherein the transmembrane domain is derived from CD3^, CD28, CD4, or CD8a.Attorney Docket No: 243734.00022220. The modified immune effector cell of any one of claims 15-19, wherein the CAR further comprises a linker domain between the extracellular antigen-binding domain and the transmembrane domain.

21. The modified immune effector cell of claim 20, wherein the linker domain comprises a hinge region.

22. The modified immune effector cell of any one of claims 15-21, wherein the CAR cytoplasmic domain comprises one or more lymphocyte activation domains.

23. The modified immune effector cell of claim 22, wherein the lymphocyte activation domain is derived from DAP10, DAP12, Fc epsilon receptor I y chain (FCER1G), CD35, CD3s, CD3y, CD3^. CD27, CD28, CD40, CD134, CD137, CD226, CD79A. ICOS, or MyD88.

24. The modified immune effector cell of any one of claims 15-23, wherein the CAR cytoplasmic domain comprises one or more co-stimulatory domains.

25. The modified immune effector cell of any one of claims 1-24, wherein the modified immune effector cell has been activated and / or expanded ex vivo.

26. The modified immune effector cell of any one of claims 1-25, wherein the modified immune effector cell is an allogeneic cell.

27. The modified immune effector cell of any one of claims 1-25, wherein the modified immune effector cell is an autologous cell.

28. The modified immune effector cell of any one of claims 1-25, wherein the modified immune effector cell is isolated from a subject having a disease.

29. The modified immune effector cell of claim 28, wherein the disease is a cancer, an infectious disease, an inflammatory disorder, or an autoimmune disease.Attorney Docket No: 243734.00022230. The modified immune effector cell of claim 29, wherein the cancer is a cancer expressing HER2, IL13Ra2. EphA2, B7-H3, CD 19, CD22. or CD 123.

31. The modified immune effector cell of claim 29, wherein the infectious disease is caused by a virus, and wherein the virus is a virus expressing gpl20.

32. The modified immune effector cell of claim 30, wherein the cancer is a HER2-positive breast cancer.

33. The modified immune effector cell of claim 30, wherein the cancer is BCMA positive multiple myeloma.

34. The modified immune effector cell of claim 30, wherein the cancer is CD19 and / or CD22 positive B-cell acute lymphoblastic leukemia.

35. The modified immune effector cell of claim 30, wherein the cancer is an IL13Ra2-positive glioblastoma.

36. The modified immune effector cell of claim 29, wherein the infectious disease is caused by a human immunodeficiency virus.

37. The modified immune effector cell of claim 29, wherein the autoimmune disease is Lupus.

38. The modified immune effector cell of any one of claims 1-37, wherein the modified immune effector cell is derived from a blood, marrow, tissue, or a tumor sample.

39. The modified immune effector cell of any one of claims 1-38, wherein the modified immune effector cell is further modified to reduce or eliminate the expression and / or function of Methyl-CpG Binding Domain Protein 5 (MBD5), BRC Al -associated protein- 1 (BAP1), and / or Additional Sex Combs Like Transcriptional Regulator 1 (ASXL1) gene(s) or gene produces ).

40. The modified immune effector cell of any one of claims 1-38, wherein the modified immune effector cell is further modified to reduce or eliminate the expression and / or function of Methyl-CpG Binding Domain Protein 5 (MBD5) gene or gene product.Attorney Docket No: 243734.00022241. The modified immune effector cell of any one of claims 39 or 40, wherein the level of functional MBD5, BAP1, and / or ASXL1 protein(s) in the cell is reduced by 50% or more.

42. The modified immune effector cell of any one of claims 39-41, wherein the MBD5, BAP1, and / or ASXL1 gene(s) are deleted so that no detectable functional MBD5, BAP1, and / or ASXL1 protein(s) are produced.

43. A pharmaceutical composition comprising the modified immune effector cell of any one of claims 1-42 and a pharmaceutically acceptable carrier and / or excipient.

44. A method for generating the modified immune effector cell of any one of claims 1-42, said method comprising modifying an MBD6 gene or gene product in the cell so that the expression and / or function of MBD6 in the cell is reduced or eliminated.

45. A method of preserving developmental potential of an immune effector cell, said method comprising modifying an MBD6 gene or gene product in the immune effector cell so that the expression and / or function of MBD6 in the immune effector cell is reduced or eliminated.

46. The method of claim 44 or claim 45, comprising further modifying a Methyl-CpG Binding Domain Protein 5 (MBD5), a BRC Al -associated protein- 1 (BAP1), and / or an Additional Sex Combs Like Transcriptional Regulator 1 (ASXL1) gene(s) or gene product(s) in the cell so that the expression and / or function of MBD5. BAP1, and / or ASXL1 in the cell is reduced or eliminated.

47. The method of any one of claims 44-46, wherein the immune effector cell is a T cell.

48. The method of claim 47. wherein the T cell is selected from a CD8+ T cell, a CD4+ T cell, a cytotoxic T cell, an a T cell, a natural killer T (NKT) cell, a y5 T cell, a memory T cell, a T-helper cell, and a regulatory T cell (Treg).

49. The method of any one of claims 44-48. wherein the method further comprises modifying the immune effector cell to express a chimeric antigen receptor (CAR) that is capable of binding to an antigen.Attorney Docket No: 243734.00022250. The method of any one of claims 44-49, wherein the MBD6 gene in the immune effector cell is modified as a result of an activity of a site-specific nuclease.

51. The method of claim 50, wherein the site-specific nuclease is an RNA-guided endonuclease.

52. The method of claim 51, wherein the RNA-guided endonuclease is a Cas9 protein. Cpfl (Cast 2a) protein, C2cl protein, C2c3 protein, or C2c2 protein.

53. The method of claim 52, wherein the RNA-guided endonuclease is a Cas9 protein.

54. The method of claim 53, wherein the Cas9 protein is programmed with a guide RNA(gRNA) that comprises a nucleotide sequence of ACACUCCAGACCGCACUUGCNGG (SEQ ID NO: 168), GUAGCUACGGGUUUGCUCCANGG (SEQ ID NO: 174), AGUUGUAGGAGGAACUCGAC (SEQ ID NO: 186),CCAAGCUGUGCAACCACCGG (SEQ ID NO: 187). orGUGCUUCAAAGCCCAUCCGA (SEQ ID NO: 188).

55. The method of claim 50, wherein the site-specific nuclease is a zinc finger nuclease, a TALEN nuclease, or mega-TALEN nuclease.

56. The method of claim 44, wherein the MBD6 gene product in the immune effector cell is modified as a result of an activity of an RNA interference (RNAi) molecule or an antisense oligonucleotide.

57. The method of claim 56, wherein the RNAi molecule is a small interfering RNA (siRNA) or a small hairpin RNA (shRNA).

58. The method of any one of claims 50-57, wherein the site-specific nuclease or the RNAi molecule or the antisense oligonucleotide is introduced into the immune effector cell via a viral vector, a non-viral vector or a physical means.

59. The method of any one of claims 49-58, wherein the CAR is expressed from a transgene introduced into the immune effector cell.Attorney Docket No: 243734.00022260. The method of claim 59, wherein the CAR-expressing transgene is introduced into the immune effector cell using a viral vector, a non-viral vector or a physical means.

61. The method of claim 58 or claim 60, wherein the viral vector is a retroviral vector, an adenoviral vector, an adeno-associated viral (AAV) vector, a herpes viral vector, or a baculoviral vector.

62. The method of claim 61, wherein the retroviral vector is a lentiviral vector.

63. The method of any claim 58 or claim 60, wherein the non-viral vector is a transposon.

64. The method of claim 63, wherein the transposon is a sleeping beauty transposon or PiggyBac transposon.

65. The method of claim 58 or claim 60. wherein the physical means is electroporation, microinjection, magnetofection, ultrasound, a ballistic or hydrodynamic method, or a combination thereof.

66. The method of any one of claims 44-65. wherein the modified immune effector cell is activated and / or expanded ex vivo.

67. A method of treating a disease in a subject in need thereof comprising administering to the subject an effective amount of the modified immune effector cell of any one of claims 1- 42 or the pharmaceutical composition of claim 43.

68. The method of claim 67, wherein the modified immune effector cell is an autologous cell.

69. The method of claim 67, wherein the modified immune effector cell is an allogeneic cell.

70. The method of any one of claims 67-69. wherein the disease is a cancer, an infectious disease, an inflammatory disorder, or an autoimmune disease.Attorney Docket No: 243734.00022271. The method of claim 70, wherein the cancer is a solid tumor.

72. The method of claim 70, wherein the cancer is a hematologic cancer.

73. The method of claim 71, wherein the cancer is a cancer expressing BCMA, HER2, IL13Ra2, EphA2, B7-H3, CD19, CD22, or CD123.

74. The method of claim 70, wherein the infectious disease is caused by a virus expressing gpl20.

75. The method of claim 70, wherein the autoimmune disease is Lupus.

76. The method of any one of claims 67-73, wherein the method comprises: i) isolating an immune effector cell from the subject or a donor; ii) modifying an MBD6 gene or gene product in the immune effector cell so that the expression and / or function of MBD6 in the immune effector cell is reduced or eliminated; and iii) introducing the modified immune effector cell into the subject.

77. The method of claim 76, wherein the method further comprises modifying the immune effector cell to express a chimeric antigen receptor (CAR) that is capable of binding specifically to an antigen.

78. The method of claim 76 or 77, wherein the method further comprises modifying an MBD5, BAP1. and / or ASXL1 gene(s) or gene product(s) in the immune effector cell so that the expression and / or function of MBD5, BAP1, and / or ASXL1 in the immune effector cell is reduced or eliminated.

79. The method of any one of claims 67-78, wherein the subject is a human or a mouse.

80. A guide RNA (gRNA) targeting MBD6 comprising a nucleotide sequence ofACACUCCAGACCGCACUUGCNGG (SEQ ID NO: 168),GUAGCUACGGGUUUGCUCCANGG (SEQ ID NO: 174),AGUUGUAGGAGGAACUCGAC (SEQ ID NO: 186),Attorney Docket No: 243734.000222CCAAGCUGUGCAACCACCGG (SEQ ID NO: 187), orGUGCUUCAAAGCCCAUCCGA (SEQ ID NO: 188).

81. A ribonucleoprotein complex comprising the gRNA of claim 80 and a Cas9 protein.

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