Provided herein are uses of fibroblast growth factor receptor 2 (FGFR2) inhibitors in cancer treatment, in some cases in combination with immune stimulating agents, such as inhibitors of PD-1 or PD-L1. In some embodiments, FGFR2 inhibitors may comprise FGFR2 antibodies or FGFR2 extracellular domain (ECD) polypeptides, or FGFR2 ECD fusion molecules comprising an FGFR2 ECD and a fusion partner. In some embodiments, PD-1/PD-L1 inhibitors may comprise anti-PD-1 antibodies such as antibodies that bind to PD-1 or to PD-L1 and inhibit interactions between these proteins, as well as PD-1 fusion proteins or polypeptides.

The invention provides compositions and methods for treating diseases associated with expression of a tumor antigen as described herein. The invention also relates to nucleic acids comprising a truncated PGK promoter operably linked to a chimeric antigen receptor (CAR) specific to a tumor antigen as described herein, vectors encoding the same, and recombinant T cells comprising the CARs of the present invention. The invention also includes methods of administering a genetically modified T cell expressing a CAR that comprises an antigen binding domain that binds to a tumor antigen as described herein.

The present disclosure provides compositions and methods for making and using engineered killer phagocytic cells for immunotherapy in cancer or infection by expressing a chimeric antigen receptor having an enhanced phagocytic activity, the chimeric receptor is encoded by a recombinant nucleic acid.

The present disclosure relates to compositions and methods of killing cells. In particular examples, the method includes contacting a cell having a cell surface protein with a therapeutically effective amount of an antibody-IR700 molecule, wherein the antibody specifically binds to the cell surface protein, such as a tumor-specific antigen on the surface of a tumor cell. The cell is subsequently irradiated, such as at a wavelength of 660 to 740 nm at a dose of at least 1 J cm.sup.−2. The cell is also contacted with one or more therapeutic agents (such as an anti-cancer agent), for example about 0 to 8 hours after irradiating the cell, thereby killing the cell. Also provided are methods of imaging cell killing in real time, using fluorescence lifetime imaging. Also provided are wearable devices that include an article of clothing, jewelry, or covering; and an NIR LED incorporated into the article, which can be used with the disclosed methods.

The present disclosure provides novel and improved IL-15 fusion proteins for use in the treatment of cancer and other disorders. In various embodiments, the fusion proteins of the invention have two functional domains: an IL-15/IL-15RαSushi domain (also referred to herein as an “IL-15/IL-15RαSushi complex”) and an antibody domain, each of which can take different forms, and configured such that the IL-15 is fused to the C-terminal of the antibody domain and co-expressed and non-covalently complexed with IL-15RαSushi. Importantly, the fusions proteins of the present invention address several of the limitations observed with the IL-15 therapeutics evaluated to date; specifically, the fusion proteins demonstrate extended the half-life of IL-15 in vivo, and demonstrate optimized preclinical activity compared to rIL-15 or related cytokine therapeutics.

Provided are anti-FGFR2b antibodies or antigen-binding fragments thereof, isolated polynucleotides encoding the same, pharmaceutical compositions comprising the same, and the uses thereof.

Provided are anti-FGFR2b antibodies or antigen-binding fragments thereof, isolated polynucleotides encoding the same, pharmaceutical compositions comprising the same, and the uses thereof.

Provided herein are methods and compositions for treating solid tumor cancers.

Compositions and methods relating to regulatable chimeric antigen receptors (RCARs), where the intracellular signaling or proliferation of the RCAR can be controlled to optimize the use of an RCAR-expressing cell to provide an immune response, are provided. For example, a RCAR can comprise a dimerization switch that, upon the presence of a dimerization molecule, can couple an intracellular signaling domain to an extracellular recognition element, e.g., an antigen binding domain, an inhibitory counter ligand binding domain, or costimulatory ECD domain. An RCAR can be engineered to include an appropriate antigen binding domain that is specific to a desired antigen target and used in the treatment of a disease.

The present invention provides multispecific antigen-binding molecules and uses thereof. The multispecific antigen-binding molecules comprise a first antigen-binding domain that specifically binds a target molecule, and a second antigen-binding domain that specifically binds an internalizing effector protein. The multispecific antigen-binding molecules of the present invention can, in some embodiments, be bispecific antibodies that are capable of binding both a target molecule and an internalizing effector protein. In certain embodiments of the invention, the simultaneous binding of the target molecule and the internalizing effector protein by the multispecific antigen-binding molecule of the present invention results in the attenuation of the activity of the target molecule to a greater extent than the binding of the target molecule alone. In other embodiments of the invention, the target molecule is a tumor associated antigen, and the simultaneous binding of the tumor associated antigen and the internalizing effector protein by the multispecific antigen-binding molecule of the present invention causes or facilitates the targeted killing of tumor cells.