Antibodies and antigen-binding fragments thereof with high affinity for CD3 and desirable developability profiles are provided, as well as methods for their manufacture and use.

The present invention relates, in part, to agents that bind PD-L1 and their use as diagnostic and therapeutic agents. The present invention further relates to pharmaceutical compositions comprising the PD-L1 targeting moiety and their use in the treatment of various diseases.

The present application provides an isolated PD-L1 binding molecule, specifically, an isolated PD-L1 single-domain antibody or an antigen-binding fragment thereof. The present invention also provides a nucleic acid encoding the isolated PD-L1 binding molecule, an expression vector or host cell comprising the nucleic acid, and a pharmaceutical composition or kit comprising the PD-L1 binding molecule.

Provided are an anti-RS virus antibody with high sensitivity and a test reagent using the antibody.

An anti-RS virus N protein monoclonal antibody, comprising a heavy chain variable region consisting of the amino acid sequence as set forth in SEQ ID NO: 1, and a light chain variable region consisting of the amino acid sequence as set forth in SEQ ID NO: 2, 3 or 4, or an antigen-binding fragment thereof.

Provided are methods of treating cancer with non-competitive, anti-OX40 antibodies and antigen-binding fragments thereof that bind to human OX40 (ACT35, CD134, or TNFRSF4), in combination with a chemotherapeutic agent.

Provided are methods of treating cancer or increasing, enhancing, or stimulating an immune response with non-competitive, agonist anti-OX40 antibodies and antigen-binding fragments thereof that bind to human OX40 (ACT35, CD134, or TNFRSF4), in combination with an anti-TIGIT antibody or fragment thereof.

High-affinity antibodies recognizing CD3 and B Cell Maturation Factor protein (BCMA) are disclosed. Binding sites from humanized anti-CD3 and anti-BCMA antibodies are incorporated into a Fabs-in-Tandem Immunoglobulin format without significant loss of binding affinity, and the resultant bispecific, multivalent binding proteins are able to bind to both CD3 and BCMA simultaneously. Such antibodies, antigen-binding portions thereof, and bispecific FIT-Ig binding proteins are useful for treating cancer.

Human monoclonal antibodies directed against B7-H1 and uses of these antibodies in diagnostics and for the treatment of diseases associated with the activity and/or expression of B7-H1 are disclosed. Additionally, hybridomas or other cell lines expressing such antibodies are disclosed.

Methods are provided for treating a subject with a therapeutic dose of anti-CD47 agent by administering a primer agent prior to administering a therapeutically effective dose of an anti-CD47 agent to the subject.

Monoclonal and polyclonal antibodies that bind hamster phospholipase B-like 2 are provided. Also provided are methods for detecting and quantifying hamster phospholipase B-like 2, for example, in recombinant polypeptide preparations, as well as kits for carrying out such methods. Methods of screening or selecting host cell lines or recombinant polypeptide-expressing cell lines that express low levels of hamster phospholipase B-like 2 are also provided.