Abstract: The present application features antibodies that bind to human neonatal Fc receptor (FcRn). These anti-FcRn antibodies are useful, e.g., to promote clearance of autoantibodies in a subject, to suppress antigen presentation in a subject, to block an immune response, e.g., block an immune complex-based activation of the immune response in a subject, and to treat immunological diseases (e.g., autoimmune diseases) in a subject. These anti-FcRn antibodies are also useful, e.g., to decrease pathogenic antibody transport across the placenta of a pregnant subject, to increase pathogenic antibody catabolism in a pregnant subject, and to treat an antibody-mediated enhancement of viral disease in a fetus or a neonate.

Abstract: The present disclosure provides methods for treating ANCA-associate vasculitis in a human in need thereof, the method comprising administering to the human a therapeutically effective amount of avacopan: or a pharmaceutically acceptable salt thereof, such that the level of plasma complement factor Bb, C3a, or C5a does not significantly change in the human upon treatment.

Abstract: Provided herein are immunomodulatory proteins comprising ICOSL variants and nucleic acids encoding such proteins. The immunomodulatory proteins provide therapeutic utility for a variety of immunological and oncological conditions. Compositions and methods for making and using such proteins are provided.

Abstract: The present application features antibodies that bind to human neonatal Fc receptor (FcRn). These anti-FcRn antibodies are useful, e.g., to promote clearance of autoantibodies in a subject, to suppress antigen presentation in a subject, to block an immune response, e.g., block an immune complex-based activation of the immune response in a subject, and to treat immunological diseases (e.g., autoimmune diseases) in a subject. These anti-FcRn antibodies are also useful, e.g., to decrease pathogenic antibody transport across the placenta of a pregnant subject, to increase pathogenic antibody catabolism in a pregnant subject, and to treat an antibody-mediated enhancement of viral disease in a fetus or a neonate.

Abstract: The present disclosure provides methods for treating ANCA-associate vasculitis in a human in need thereof, the method comprising administering to the human a therapeutically effective amount of avacopan: or a pharmaceutically acceptable salt thereof, such that the level of plasma complement factor Bb, C3a, or C5a does not significantly change in the human upon treatment.

Abstract: The present application features antibodies that bind to human neonatal Fc receptor (FcRn). These anti-FcRn antibodies are useful, e.g., to promote clearance of autoantibodies in a subject, to suppress antigen presentation in a subject, to block an immune response, e.g., block an immune complex-based activation of the immune response in a subject, and to treat immunological diseases (e.g., autoimmune diseases) in a subject. These anti-FcRn antibodies are also useful, e.g., to decrease pathogenic antibody transport across the placenta of a pregnant subject, to increase pathogenic antibody catabolism in a pregnant subject, and to treat an antibody-mediated enhancement of viral disease in a fetus or a neonate.

Abstract: The present disclosure provides methods for treating ANCA-associate vasculitis in a human in need thereof, the method comprising administering to the human a therapeutically effective amount of avacopan: or a pharmaceutically acceptable salt thereof, such that the level of plasma complement factor Bb, C3a, or C5a does not significantly change in the human upon treatment.