PARP2 (IMAGE) Rockefeller University Caption By preventing DNA repair, PARP inhibitor drugs cause cancer cells to accumulate mutated chromosomes, ultimately killing them. Credit Laboratory of Cell Biology and Genetics at The Rockefeller University Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. 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.