Engineering Healthier Hearts (IMAGE) Brown University Caption Brown University and LIfespan researchers designed a new way, using a tissue engineering mold, to align human non-embryonic stem cells to derive heart muscle cells to strengthen a rat's heart after a heart attack. The engineered muscle cell bands appear green. The team is led by Kareen Coulombe, assistant professor of engineering, and researchers at Lifespan's Cardiovascular Research Center Ulrike Mende, professor of medicine and Bum-Rak Choi, associate professor of medicine (research). Credit Courtesy Kareen Coulombe Usage Restrictions with credit 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.