Abstract: Provided herein are constitutively active chimeric cytokine receptors (CACCRs). When present on chimeric antigen receptor (CAR)-bearing immune cells, such CACCRs allow for increased immune cell activation, proliferation, persistence, and/or potency. Also provided are methods of making and using the CACCRs described herein.

Abstract: Provided here are engineered immune cells that comprise a constitutively active chimeric cytokine receptor (CACCR) and a B-cell maturation antigen (BCMA) specific chimeric antigen receptor (CAR). Also provided herein are engineered immune cells that comprise one or more nucleic acids e.g. a bicistronic vector such as a viral vector that encode the CACCRs and BCMA CARs and engineered immune cells e.g. engineered autologous or allogeneic T cells that express both CACCRs and BCMA CARs from the nucleic acids. When present on chimeric antigen receptor (CAR)-bearing engineered immune cells, the CACCRs allow for increased immune cell activation, proliferation, persistence, and/or potency. Further provided herein are methods of making and using the engineered immune cells described herein, such as methods of treating a disease or condition by administering at least one appropriate dose of the cells to a patient suffering from the condition.

Abstract: Provided herein are anti-idiotype antibodies that specifically recognize anti-CD70 antibody moieties, in particular, anti-CD70 antibody moieties present in recombinant receptors, including chimeric antigen receptors (CARs). The disclosure further relates to uses of anti-idiotype antibodies for specifically identifying and/or selecting cells expressing such recombinant receptors, such as anti-CD70 CAR T cells. The disclosure further relates to uses of anti-idiotype antibodies for specifically activating such cells.

Abstract: Provided herein are Claudin 18.2 binding agents and chimeric antigen receptors (CARs) comprising a Claudin 18.2 binding molecule that specifically binds to Claudin 18.2; and immune cells comprising these Claudin 18.2-specific CARs, e.g., CAR-T cells. Also provided are methods of making and using Claudin 18.2-specific CARs and Claudin 18.2 binding agents, and immune cells comprising Claudin 18.2-specific CARs.

Abstract: The present invention provides antibodies that specifically bind to CD70 (Cluster of Differentiation 70). The invention further provides bispecific antibodies that bind to CD70 and another antigen (e.g., CD3). The invention further relates to antibody encoding nucleic acids, and methods of obtaining such antibodies (monospecific and bispecific). The invention further relates to therapeutic methods for use of these antibodies for the treatment of CD70-mediated pathologies, including cancer.

Abstract: Provided herein are PD-1 chimeric cytokine receptors. When present on chimeric antigen receptor (CAR)-bearing immune cells, such receptors allow for increased immune cell activation, proliferation, persistence, and/or potency, when engaged with PD-1 ligands or activation with an anti-PD-1 antibody. Also provided are methods of making and using the chimeric cytokine receptors described herein.

Abstract: Provided herein are chimeric switch receptors (CSRs) comprising an ectodomain and/or transmembrane domain derived from an inhibitory receptor (e.g. PD1 or TGF?R2) fused to the transmembrane domain and/or intracellular signaling domain derived from one or more costimulatory proteins (e.g. CD2, CD28, MyD88, DAP10 or ICOS), or variants thereof. The chimeric switch receptors are designed to convert a signal e.g. an inhibitory signal such as an immunosuppressive signal in the form of PD-L1 or TGF? into a costimulatory signal. Also provided are engineered immune cells engineered to functionally express a chimeric switch receptor and/or a CAR and optionally also a chimeric cytokine receptor (CCR), and populations thereof, methods of making and using the engineered cells, compositions and kits comprising them, and methods of treating e.g. cancer (e.g. solid or hematologic tumors) by administering the cells and the compositions.

Abstract: Provided herein are PD-1 chimeric cytokine receptors. When present on chimeric antigen receptor (CAR)-bearing immune cells, such receptors allow for increased immune cell activation, proliferation, persistence, and/or potency, when engaged with PD-1 ligands or activation with an anti-PD-1 antibody. Also provided are methods of making and using the chimeric cytokine receptors described herein.

Abstract: Provided herein are DLL3 binding agents and chimeric antigen receptors (CARs) comprising a DLL3 binding molecule that specifically binds to DLL3; and immune cells comprising these DLL3-specific CARs, e.g., CAR-T cells. Also provided are methods of making and using DLL3-specific CARs, and immune cells comprising DLL3-specific CARs.

Abstract: Provided herein are DLL3 binding agents and chimeric antigen receptors (CARs) comprising a DLL3 binding molecule that specifically binds to DLL3; and immune cells comprising these DLL3-specific CARs, e.g., CAR-T cells. Also provided are methods of making and using DLL3-specific CARs, and immune cells comprising DLL3-specific CARs.

Abstract: The disclosure provides CARs (CARs) that specifically bind to CD70. The disclosure further relates to engineered immune cells comprising such CARs, CAR-encoding nucleic acids, and methods of making such CARs, engineered immune cells, and nucleic acids. The disclosure further relates to therapeutic methods for use of these CARs and engineered immune cells comprising these CARs for the treatment of a condition associated with malignant cells expressing CD70 (e.g., cancer).

Abstract: The present invention provides antibodies that specifically bind to CD70 (Cluster of Differentiation 70). The invention further provides bispecific antibodies that bind to CD70 and another antigen (e.g., CD3). The invention further relates to antibody encoding nucleic acids, and methods of obtaining such antibodies (monospecific and bispecific). The invention further relates to therapeutic methods for use of these antibodies for the treatment of CD70-mediated pathologies, including cancer.

Abstract: Provided herein are CD70-binding proteins comprising a CD70-binding domain and a transmembrane domain, engineered immune cells comprising the CD70-binding proteins, and methods of making and using the same. Also provided herein are engineered immune cells e.g. CAR (chimeric antigen receptor) T cells for administration to patients to treat cancer (e.g., solid tumors and hematologic tumors) and other unwanted conditions. The cells are engineered to functionally express a first antigen binding molecule e.g. a CD70 CAR and a second antigen binding molecule e.g. a second CAR that binds a target molecule characteristic of the cancer or other disease or unwanted condition. The cells may be further engineered to reduce the functional expression level of one or more of TRAC, CD52 and CD70. Also provided are methods of making and using the engineered cells, compositions and kits comprising them, and methods of treating by administering them.

Abstract: The disclosure provides CARs (CARs) that specifically bind to CD70. The disclosure further relates to engineered immune cells comprising such CARs, CAR-encoding nucleic acids, and methods of making such CARs, engineered immune cells, and nucleic acids. The disclosure further relates to therapeutic methods for use of these CARs and engineered immune cells comprising these CARs for the treatment of a condition associated with malignant cells expressing CD70 (e.g., cancer).

Abstract: A reversibly gated effector polypeptide e.g. a chimeric antigen receptor (protease-activating CD45-gate CAR) comprising an extracellular CD45 recruiting domain, a protease-cleavable linker, and a polypeptide comprising an extracellular ligand binding domain, a transmembrane domain, and an intracellular domain. Nucleic acids including vectors and expression vectors that encode the protease-activating CD45-gate CAR and cells including immune cells such as T cells that comprise and express the nucleic acids. Methods of treatment of various conditions including various forms of cancer comprising administering the cells including CAR T cell therapy. In some embodiments, the CD45 gate at least partially inhibits activation of the protease-activating CD45-gate CAR when the protease-activating CD45-gate CAR binds antigen. The inhibition is at least partially diminished, relieved and/or eliminated when the protease-activating CD45-gate CAR is exposed to a protease that can cleave the linker.

Abstract: The present invention provides antibodies that specifically bind to CD70 (Cluster of Differentiation 70). The invention further provides bispecific antibodies that bind to CD70 and another antigen (e.g., CD3). The invention further relates to antibody encoding nucleic acids, and methods of obtaining such antibodies (monospecific and bispecific). The invention further relates to therapeutic methods for use of these antibodies for the treatment of CD70-mediated pathologies, including cancer.

Abstract: Provided herein are recombinant antigen receptors, for example chimeric antigen receptors (CARs), that comprise modified cytoplasmic domains that provide improved signalling and thereby provide improved performance and safety. Also provided are polynucleotides encoding the recombinant antigen receptors, vectors comprising the polynucleotides, and engineered immune cells comprising the vectors and/or polynucleotides. The invention further provides methods for engineering immune cells to express the recombinant antigen receptors. Improved recombinant antigen receptor signalling is also provided by co-expressing a first recombinant antigen receptor and a second recombinant antigen receptor or co-expressing a recombinant antigen receptor and a protein involved in transducing the signal from the activated recombinant antigen receptor.

Abstract: Provided here are engineered immune cells that comprise a constitutively active chimeric cytokine receptor (CACCR) and a B-cell maturation antigen (BCMA) specific chimeric antigen receptor (CAR). Also provided herein are engineered immune cells that comprise one or more nucleic acids e.g. a bicistronic vector such as a viral vector that encode the CACCRs and BCMA CARs and engineered immune cells e.g. engineered autologous or allogeneic T cells that express both CACCRs and BCMA CARs from the nucleic acids. When present on chimeric antigen receptor (CAR)-bearing engineered immune cells, the CACCRs allow for increased immune cell activation, proliferation, persistence, and/or potency. Further provided herein are methods of making and using the engineered immune cells described herein, such as methods of treating a disease or condition by administering at least one appropriate dose of the cells to a patient suffering from the condition.

Abstract: Provided herein are DLL3 binding agents and chimeric antigen receptors (CARs) comprising a DLL3 binding molecule that specifically binds to DLL3; and immune cells comprising these DLL3-specific CARs, e.g., CAR-T cells. Also provided are methods of making and using DLL3-specific CARs, and immune cells comprising DLL3-specific CARs.

Abstract: Provided herein are chimeric cytokine receptors bearing a binding domain capable of binding a TGF-? ligand or a TGF-? receptor antibody. When present on chimeric antigen receptor (CAR)-bearing immune cells (CAR-T-cells), such receptors allow for increased CAR-T cell expansion, activity and persistence, constitutively and/or through engagement of a TGF-? ligand or a TGF-? receptor antibody. Also provided are methods of making and using the chimeric cytokine receptors described herein.