The protein known as six-transmembrane epithelial antigen of prostate 2 (STEAP2) is highly expressed in prostate cancer and is associated with the expression of other prostate cancer-associated genes. The present invention provides novel full-length human IgG antibodies that bind to human STEAP2 (monospecific antibodies). The present invention also provides novel bispecific antibodies (bsAbs) that bind to both STEAP2 and CD3 and activate T cells via the CD3 complex in the presence of STEAP2-expressing tumors. According to certain embodiments, the present invention provides bispecific antigen-binding molecules comprising a first antigen-binding domain that specifically binds human and monkey CD3, and a second antigen-binding molecule that specifically binds humanSTEAP2. In certain embodiments, the bispecific antigen-binding molecules of the present invention are capable of inhibiting the growth of tumors expressing STEAP2. The bispecific antigen-binding molecules of the invention are useful for the treatment of prostate diseases and disorders in which an upregulated or induced STEAP2-targeted immune response is desired and/or therapeutically beneficial. For example, the bispecific antibodies of the invention are useful for the treatment of prostate cancers, including castrate-resistant prostate cancer. The present invention also includes anti-STEAP2 antibody drug conjugates which inhibit tumor growth in vivo.

Provided herein are compounds, compositions, and methods for the treatment of diseases and disorders associated with cancer, including tubulysins and protein (e.g., antibody) drug conjugates thereof.

Provided herein are cell penetrating conjugates. The conjugates include non-cell penetrating proteins connected through a phosphorothioate nucleic acid, wherein the phosphorothioate nucleic acid enhances intracellular delivery of the non-cell penetrating proteins. Also provided are methods and kits including the conjugates provided herein.

Provided in the present invention are an anti-CD73 antibody and the use thereof. Specifically, a heavy chain variable region of the antibody contains HCDR1 to HCDR3 having amino acid sequences as shown in SEQ ID NOs: 15-17, respectively. Furthermore, a light chain variable region of the antibody contains LCDR1 to LCDR3 having amino acid sequences as shown in SEQ ID NOs: 18-20, respectively.

The present invention relates to single-domain antibodies that specifically bind aminopeptidase N (APN), and more in particular to polypeptides, and nucleic acids encoding such polypeptides; to methods for preparing such polypeptides; to compositions and in particular to pharmaceutical compositions that comprise such polypeptides, for prophylactic, therapeutic or diagnostic purposes. In particular, the single-domain antibodies of the present invention are capable of targeting a moiety to a mucosal surface.

Provided are an anti-CD73-anti-PD-1 bispecific antibody, a pharmaceutical composition thereof and a use thereof.

The invention relates to a multifunctional system stable in a physiological medium, which includes in the same platform an anti-carcinogenic molecule, an imaging agent and a directing molecule that interacts specifically with cancer-cell membrane receptors, the system allowing pathological tissue imaging and pharmacological action to be carried out jointly with high specificity. The intratumoral administration of the system facilitates selective diffusion to cancer cells and minimises the disadvantages of chemotherapy.

Antibodies and antigen-binding fragments thereof that specifically bind to human DCLK1 protein, hybridomas or other cell lines which express such antibodies and antigen-binding fragments thereof, nucleic acids, vectors, and host cells comprising nucleic acids which encode such antibodies and antigen-binding fragments thereof, and methods of use thereof are disclosed. In at least certain non-limiting embodiments, the antibodies or antigen-binding fragments thereof specifically bind to an epitope within isoform 2 or 4 of DCLK1 protein.

Provided are novel human-derived antibodies specific for Fibroblast Activation Protein (FAP), preferably capable of selectively inhibiting the enzymatic activity of FAP, as well as methods related thereto. In addition, methods of diagnosing and/or monitoring diseases and treatments thereof which are associated with FAP are provided. Assays and kits related to antibodies specific for FAP are also disclosed. The novel anti-FAP antibodies can be used in pharmaceutical and diagnostic compositions for FAP-targeted immunotherapy and diagnostics.

The present invention relates to matriptase antibodies and immunoconjugates of matriptase antibodies with cytotoxic agents and the use thereof for killing or inhibiting the growth of matriptase-expressing cancer cells, such as those of multiple myeloma and breast cancers. In particular, immunoconjugates comprising a matriptase monoclonal antibody and anticancer agents such as auristatin, including monomethyl auristatin E(MMAE) and monomethyl auristatin F(MMAF) are introduced, which have potent antitumor activity in vivo. Moreover, importantly; there was no weight loss or other evidence of toxicity in the animals, indicating that no significant free drug was released into the circulation from the conjugate. The present invention also provides compositions comprising these new immunoconjugates and use of them for treatment of malignancies comprising cells that express matriptase. In addition, administration of a matriptase antibody or immunoconjugates of a matriptase antibody and a cytotoxic agent in combination with administration of an immunomodulatory agent, such as thalidomide or an analog thereof, provides a more effective treatment of these cancers.