New Heart Muscle Cells (IMAGE) University of California - San Diego Caption New heart muscle cells (green with yellow nuclei) grow in the infarcted region of a mouse heart treated by the patch loaded with FSTL1. Credit UC San Diego/SBP Usage Restrictions Please credit UC San Diego/SBP 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.