Nanoparticles (IMAGE) Michigan State University Caption The dotted line outlines the atherosclerotic artery and the green represents our nanoparticles, which are in the plaque. The red indicates macrophages, which is the cell type that the nanoparticles are stimulating to eat the debris. Credit Bryan Smith, Michigan State University 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.