Softening Arteries, Protecting the Heart (IMAGE) University of Pennsylvania School of Medicine Caption This image shows collagen production (stained red) in aortic smooth muscle cells. The cell nuclei are stained blue. Credit Richard K. Assoian, Ph.D., Perelman School of Medicine, Univeristy of Pennsylvania; <I>Cell Reports</I> Usage Restrictions None 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.