Cell Aging (image) University of California - San Diego Share Print E-Mail Caption Cells periodically switch between "on" and "off" in their chromatin state during aging. Aged cells lose this switching capability, resulting in cell death. These findings uncover a potential cause of cellular aging and suggest new ways to promote longevity. Credit UC San Diego Usage Restrictions Must be used in conjunction with PNAS study on aging. Share Print E-Mail 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.