Abstract: Methods of reducing cytokine levels and methods of treating conditions with antibodies that bind colony stimulating factor 1 receptor (CSF1R) are provided. Such methods include, but are not limited to, methods of treating inflammatory conditions, such as rheumatoid arthritis.

Abstract: The present invention provides antibodies that bind FGFR2IIIb, wherein the antibodies are afucosylated. The present invention provides compositions comprising antibodies that bind FGFR2IIIb, wherein at least 95% of the antibodies in the composition are afucosylated. In some embodiments, methods of treating cancer comprising administering afucosylated anti-FGFR2IIIb antibodies are provided.

Abstract: Methods of treating cancers comprising FGFR1 gene amplification are provided. In some embodiments, the methods comprise administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule. In some embodiments, the methods comprise administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule in combination with at least one additional therapeutic agent.

Abstract: Methods of treating cancers comprising FGFR1 gene amplification, FGFR1 overexpression, FGFR3 overexpression, FGFR3 amplification, FGF2 overexpression, and/or FGF2 gene amplification are provided. In some embodiments, the methods comprise administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule. In some embodiments, the methods comprise administering a FGFR1 ECD and/or an FGFR1 ECD fusion molecule in combination with at least one additional therapeutic agent. In some embodiments, methods of treating cancers comprising administering a FGFR1 ECD and/or an FGFR1 ECD fusion molecule in combination with at least one chemotherapeutic agent are provided.

Abstract: Methods of treating pigmented villonodular synovitis (PVNS) with antibodies that bind colony stimulating factor 1 receptor (CSF1R) are provided.

Abstract: Antibodies that bind CSF1R are provided. Antibody heavy chains and light chains that are capable of forming antibodies that bind CSF1R are also provided. Polynucleotides encoding antibodies to CSF1R are provided. Polynucleotides encoding antibody heavy chains and lights chains are also provided. Methods of treatment using antibodies to CSF1R are provided. Such methods include, but are not limited to, methods of treating rheumatoid arthritis, bone loss, and multiple sclerosis.

Abstract: Methods of treating cancers comprising FGFR1 gene amplification are provided. In some embodiments, the methods comprise administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule. In some embodiments, the methods comprise administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule in combination with at least one additional therapeutic agent.

Abstract: Antibodies that bind CSF1R are provided. Antibody heavy chains and light chains that are capable of forming antibodies that bind CSF1R are also provided. Polynucleotides encoding antibodies to CSF1R are provided. Polynucleotides encoding antibody heavy chains and lights chains are also provided. Methods of treatment using antibodies to CSF1R are provided. Such methods include, but are not limited to, methods of treating rheumatoid arthritis, bone loss, and multiple sclerosis.

Abstract: Methods of treating cancer with antibodies that bind colony stimulating factor 1 receptor (CSF1R) in combination with PD-1/PD-L1 inhibitors are provided.

Abstract: Methods of treating cancer with antibodies that bind colony stimulating factor 1 receptor (CSF1R) in combination with one or more immune stimulating agents are provided.

Abstract: Methods of identifying and using SLAMF1 antagonists are provided.

Abstract: Methods of treating cancer comprising administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule in combination with at least one additional therapeutic agent selected from docetaxel, paclitaxel, vincristine, carboplatin, cisplatin, oxaliplatin, doxorubicin, 5-fluorouracil (5-FU), leucovorin, pemetrexed, and bevacizumab are provided. Dosage packs comprising an FGFR1 ECD and/or an FGFR1 ECD fusion molecule and/or at least one additional therapeutic agent selected from docetaxel, paclitaxel, vincristine, carboplatin, cisplatin, oxaliplatin, doxorubicin, 5-fluorouracil (5-FU), leucovorin, pemetrexed, and bevacizumab are also provided. In some embodiments, a dosage pack comprises instructions for administering FGFR1 ECD and/or FGFR1 ECD fusion molecule with at least one additional therapeutic agent.

Abstract: The invention provides FGFR fusion proteins, methods of making them, and methods of using them to treat proliferative disorders, including cancers and disorders of angiogenesis. The FGFR fusion molecules can be made in CHO cells and may comprise deletion mutations in the extracellular domains of the FGFRs which improve their stability. These fusion proteins inhibit the growth and viability of cancer cells in vitro and in vivo. The combination of the relatively high affinity of these receptors for their ligand FGFs and the demonstrated ability of these decoy receptors to inhibit tumor growth is an indication of the clinical value of the compositions and methods provided herein.

Abstract: Methods of treating cancers comprising administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule are provided. Methods of treating cancers comprising administering a fibroblast growth factor receptor 1 (FGFR1) extracellular domain (ECD) and/or an FGFR1 ECD fusion molecule and at least one anti-angiogenic agent are provided.

Abstract: Methods of treating cancer with antibodies that bind colony stimulating factor 1 receptor (CSF1R) in combination with PD-1/PD-L1 inhibitors are provided.

Abstract: Antibodies that bind CSF1R are provided. Antibody heavy chains and light chains that are capable of forming antibodies that bind CSF1R are also provided. Polynucleotides encoding antibodies to CSF1R are provided. Polynucleotides encoding antibody heavy chains and lights chains are also provided. Methods of treatment using antibodies to CSF1R are provided. Such methods include, but are not limited to, methods of treating rheumatoid arthritis, bone loss, and multiple sclerosis.

Abstract: This application relates to CD80 (B7-1) extracellular domain (ECD) polypeptides and CD80-ECD fusion molecules and their use in treatment of cancer, both alone and in combination with other therapeutic agents, such as immune stimulating agents such as PD-1/PD-L1 inhibitors.

Abstract: 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.

Abstract: 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. This application also provides methods of predicting response to treatment of cancer, such as bladder or gastric cancer, with FGFR2 inhibitors by determining FGFR2 overexpression and/or gene amplification in tumor cells of cancer subjects before treatment with FGFR2 inhibitors either alone or in combination with immune stimulating agents.

Abstract: Antibodies that bind CSF1R are provided. Antibody heavy chains and light chains that are capable of forming antibodies that bind CSF1R are also provided. Polynucleotides encoding antibodies to CSF1R are provided. Polynucleotides encoding antibody heavy chains and lights chains are also provided. Methods of treatment using antibodies to CSF1R are provided. Such methods include, but are not limited to, methods of treating rheumatoid arthritis, bone loss, and multiple sclerosis.