Antibody drug conjugates (ADC’s) that bind to 191P4D12 protein and variants thereof are described herein. 191P4D12 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, the ADC’s of the invention provide a therapeutic composition for the treatment of cancer.

The present invention relates to methods for preventing or treating head and neck squamous cell cancer and bladder cancer using an immunotoxin comprising (a) a ligand that binds to a protein on the cancer cell attached to; (b) a toxin that is cytotoxic to the cancer cell. In a specific embodiment, the invention is directed to the prevention or treatment of head and neck squamous cell cancer or bladder cancer using Vb4-845, which is a recombinant immunotoxin comprising a humanized, MOC31-derived, single-chain antibody fragment that is fused to a truncated form of Pseudomonas exotoxin A. Also encompassed by the invention are combination therapy methods, including the use of reduced dosages of chemotherapeutic agents, for the prevention or treatment of cancer. Also encompassed by the invention are formulations and methods for direct administration of the recombinant immunotoxin to the carcinoma, for the prevention or treatment of cancer.

Disclosed herein are non-natural amino acids and dolastatin analogs that include at least one non-natural amino acid, and methods for making such non-natural amino acids and polypeptides. The dolastatin analogs can include a wide range of possible functionalities, but typically have at least one oxime, carbonyl, dicarbonyl, and/or hydroxylamine group. Also disclosed herein are non-natural amino acid dolastatin analogs that are further modified post-translationally, methods for effecting such modifications, and methods for purifying such dolastatin analogs. Typically, the modified dolastatin analogs include at least one oxime, carbonyl, dicarbonyl, and/or hydroxylamine group. Further disclosed are methods for using such non-natural amino acid dolastatin analogs and modified non-natural amino acid dolastatin analogs, including therapeutic, diagnostic, and other biotechnology use.

It is an object of the present invention to provide an antibody binding to CDH6 and having internalization activity, an antibody-drug conjugate of the antibody and a drug having antitumor activity, a pharmaceutical product comprising the antibody-drug conjugate and having therapeutic effects on a tumor, a method for treating a tumor using the antibody, the antibody-drug conjugate or the pharmaceutical product, and the like. The present invention provides an anti-CDH6 antibody having internalization activity, an antibody-drug conjugate of the antibody and a drug having antitumor activity, a pharmaceutical product comprising the antibody or the antibody-drug conjugate, and a method for treating a tumor.

Antibodies and molecules derived therefrom that bind to novel STEAP-1 protein, and variants thereof, are described wherein STEAP-1 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, STEAP-1 provides a diagnostic, prognostic, prophylactic and/or therapeutic target for cancer. The STEAP-1 gene or fragment thereof, or its encoded protein, or variants thereof, or a fragment thereof, can be used to elicit a humoral or cellular immune response; antibodies or T cells reactive with STEAP-1 can be used in active or passive immunization.

The present invention relates to pyrrolobenzodiazepines (PBDs) having a labile protecting group in the form of a linker to an antibody.

To provide an antitumor drug having excellent therapeutic effect, which is excellent in terms of antitumor effect and safety. Provided is an antibody-drug conjugate in which an antitumor compound represented by the following formula is conjugated to an anti-HER3 antibody via a linker having a structure represented by the formula: -L.sup.1-L.sup.2-L.sup.P-NH—(CH.sub.2)n.sup.1-L.sup.a-(CH.sub.2)n.sup.2-C(═O)— or -L.sup.1-L.sup.2-L.sup.P- (the anti-HER3 antibody is connected to the terminal of L.sup.1, the antitumor compound is connected to the carbonyl group of —(CH.sub.2)n.sup.2-C(═O)— moiety or the C terminal of L.sup.P, with the nitrogen atom of the amino group at position 1 as a connecting position). ##STR00001##

The present invention relates to methods for preventing or treating head and neck spuamous cell cancer and bladder cancer using an immunotoxin comprising (a) a ligand that binds to a protein on the cancer cell attached to; (b) a toxin that is cytotoxic to the cancer cell. In a specific embodiment, the invention is directed to the prevention or treatment of head and neck squamous cell cancer or bladder cancer using Vb4-845, which is a recombinant immunotoxin comprising a humanized, MOC31-derived, single-chain antibody fragment that is fused to a truncated form of Pseudomonas exotoxin A. Also encompassed by the invention are combination therapy methods, including the use of reduced dosages of chemotherapeutic agents, for the prevention or treatment of cancer. Also encompassed by the invention are formulations and methods for direct administration of the recombinant immunotoxin to the carcinoma, for the prevention or treatment of cancer.

The present invention relates to therapeutic conjugates with improved ability to target various diseased cells containing a targeting moiety (such as an antibody or antibody fragment), a linker and a therapeutic moiety, and further relates to processes for making and using the conjugates.

Antibody drug conjugates (ADC's) that bind to 191P4D12 protein and variants thereof are described herein. 191P4D12 exhibits tissue specific expression in normal adult tissue, and is aberrantly expressed in the cancers listed in Table I. Consequently, the ADC's of the invention provide a therapeutic composition for the treatment of cancer.