Cofetuzumab pelidotin (INN;[1] development code PF-06647020) is an experimental antibody-drug conjugate in development for the treatment of cancer. It was created by Stemcentrx and is being developed by Pfizer.[2] The drug is an anti-PTK7 monoclonal antibody linked to auristatin-0101, an auristatin microtubule inhibitor.[3][4]
Antibody-drug conjugates use a monoclonal antibody that binds to tumors cells linked to a cytotoxic drug that then kills the cells. This allows the drug to selectively target the cells that the antibody binds to.[citation needed]
PTK7 is expressed by many tumors, including ovarian cancer, breast cancer, and non-small cell lung cancer.[5] Early clinical trial results show a 50% response rate in patients with triple negative breast cancer and an almost complete response in ovarian tumors resistant to platinum-based chemotherapies.[6]