Science Image (IMAGE) Salk Institute Caption Skin fibroblasts were successfully reprogrammed into the smooth muscle cells (red) and endothelial cells (white) which surround blood vessels. The cells' nuclei are shown in blue. Credit Bersini, Schulte et al. CC by 4.0 Usage Restrictions with credit and related coverage. 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.