Macrophage Foam Cell (IMAGE) Virginia Commonwealth University Caption A macrophage foam cell contained fat droplets (green) that are surrounded by CEH (red) showing how this enzyme associates with fat and releases cholesterol to be picked up by HDL. The nucleus of the cell is stained blue. Credit Bernard J. Fisher/VCU 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.