Prostate Cancer Cells (IMAGE) University of Pennsylvania School of Medicine Caption Blocking CDK7 sets off a chain reaction that results in the death of prostate cancer cells that have spread and are resistant to standard therapies. Credit Penn Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.