New Muscle Cells (image) University of Illinois at Urbana-Champaign Caption Treatment with stem cells derived from blood vessels spurred nestin-positive stem cells already present in the heart to form new cardiac muscle cells (see arrows). Credit Suzanne Berry-Miller Usage Restrictions Image may be used only to accompany stories about the research described in the release. Credit required 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.