Abstract: The present disclosure provides antibodies that specifically bind complement pathway component C1s The present disclosure provides nucleic acids comprising nucleotide sequences encoding the anti-C1s antibodies; and host cells comprising the nucleic acids. The present disclosure provides compositions comprising the anti-C1s antibodies. The present disclosure provides methods of use of the anti-C1s antibodies.

Abstract: The present disclosure provides anti-complement factor Bb antibodies, and compositions comprising the antibodies. The anti-Bb antibodies are useful for treating complement-mediated disorders. The present disclosure provides methods of treating complement-mediated disorders.

Abstract: The present disclosure provides humanized anti-C1s antibodies. The present disclosure provides nucleic acids comprising nucleotide sequences encoding the humanized anti-C1s antibodies; and host cells comprising the nucleic acids. The present disclosure provides compositions comprising the humanized anti-C1s antibodies. The present disclosure provides methods of use of the humanized anti-C1s antibodies.

Abstract: The present disclosure provides methods of treating an alloimmune or autoimmune disorder in an individual; the methods involve administering to the individual an effective amount of an antibody specific for complement component C1s. The present disclosure provides a method of monitoring, the efficacy of a subject treatment method; the method involves detecting the level of autoantibody or alloantibody in a biological sample obtained from the individual.

Abstract: Provided herein are humanized anti-factor Bb antibodies, methods of producing the antibodies and methods of using the antibodies.

Abstract: The present disclosure provides antibodies that bind complement C1s protein; and nucleic acid molecules that encode such antibodies. The present disclosure also provides compositions comprising such antibodies, and methods to produce and use such antibodies, nucleic acid molecules, and compositions.

Abstract: The present disclosure provides antibodies that bind complement C1s protein; and nucleic acid molecules that encode such antibodies. In some embodiments, such anti-complement C1s antibodies inhibit proteolytic activity of C1s. The present disclosure also provides compositions comprising such antibodies, and methods to produce and use such antibodies, nucleic acid molecules, and compositions.

Abstract: The present disclosure provides humanized anti-C1s antibodies. The present disclosure provides nucleic acids comprising nucleotide sequences encoding the humanized anti-C1s antibodies; and host cells comprising the nucleic acids. The present disclosure provides compositions comprising the humanized anti-C1s antibodies. The present disclosure provides methods of use of the humanized anti-C1s antibodies.

Abstract: Provided herein are humanized anti-factor Bb antibodies, methods of producing the antibodies and methods of using the antibodies.

Abstract: The present disclosure provides methods of inducing a complement activity on a surface of a cell comprising contacting the cell with an effective amount of an anti-Factor B antibody, wherein the anti-Factor B antibody inhibits dissociation of a C3bBb complex into a Factor Bb and a C3b.

Abstract: Provided herein are humanized anti-factor Bb antibodies, methods of producing the antibodies and methods of using the antibodies.

Abstract: The present disclosure provides anti-complement factor Bb antibodies, and compositions comprising the antibodies. The anti-Bb antibodies are useful for treating complement-me-diated disorders. The present disclosure provides methods of treating complement-mediated disorders.

Abstract: The present disclosure provides methods of treating a complement-mediated disease or disorder in an individual, and methods of inhibiting activation of complement component C4 in an individual in need thereof. The methods comprise administering to the individual an anti-C1s antibody. The methods also comprise administering an anti-C1s antibody in a fixed dose, e.g., 5.5 g, 6.5 g, or 7.5 g. The methods also comprise administering an effective dose of an anti-C1s antibody to the individual to achieve a minimum serum level of anti-C1s antibody for therapeutic effect.

Abstract: The present disclosure provides anti-complement factor Bb antibodies, and compositions comprising the antibodies. The anti-Bb antibodies are useful for treating complement-mediated disorders. The present disclosure provides methods of treating complement-mediated disorders.

Abstract: The present disclosure provides humanized anti-C1s antibodies. The present disclosure provides nucleic acids comprising nucleotide sequences encoding the humanized anti-C1s antibodies; and host cells comprising the nucleic acids. The present disclosure provides compositions comprising the humanized anti-C1s antibodies. The present disclosure provides methods of use of the humanized anti-C1s antibodies.

Abstract: The present disclosure provides humanized anti-C1s antibodies. The present disclosure provides nucleic acids comprising nucleotide sequences encoding the humanized anti-C1s antibodies; and host cells comprising the nucleic acids. The present disclosure provides compositions comprising the humanized anti-C1s antibodies. The present disclosure provides methods of use of the humanized anti-C1s antibodies.

Abstract: The present disclosure provides methods of inducing a complement activity on a surface of a cell comprising contacting the cell with an effective amount of an anti-Factor B antibody, wherein the anti-Factor B antibody inhibits dissociation of a C3bBb complex into a Factor Bb and a C3b.

Abstract: The present disclosure provides methods for treating a tauopathy (e.g., an acute tauopathy) in an individual by administering an anti-Tau antibody to the individual. Also provided are methods of treating traumatic brain injury and methods of treating stroke in an individual by administering an anti-Tau antibody to the individual.

Abstract: The present disclosure provides antibodies that bind complement C1s protein; and nucleic acid molecules that encode such antibodies. The present disclosure also provides compositions comprising such antibodies, and methods to produce and use such antibodies, nucleic acid molecules, and compositions.

Abstract: The present disclosure provides antibodies that bind complement C1s protein; and nucleic acid molecules that encode such antibodies. In some embodiments, such anti-complement C1s antibodies inhibit proteolytic activity of C1s. The present disclosure also provides compositions comprising such antibodies, and methods to produce and use such antibodies, nucleic acid molecules, and compositions.