The Stemness of Cancer Cells (IMAGE) Salk Institute Caption The tumor suppressor p53 prevents established cancer cells from sliding toward a more aggressive, stem-like state. Credit Image: Courtesy of Dr. Benjamin Spike, Salk Institute for Biological Studies Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. 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.