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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. The drug is an anti-PTK7 monoclonal antibody linked to Auristatin-0101, an auristatin microtubule inhibitor.[1][2]
Antibody-drug conjugates use a monoclonal antibody that binds to tumors cells linked to a cytotoxic drug. This allows the drug to selectively target the cells that the antibody binds to.
PTK7 is expressed by many tumors, including ovarian cancer, breast cancer, and non-small cell lung cancer.[3] 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.[4]