Cell Aging (IMAGE) University of California - San Diego 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. 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.