Del-1 in the Brain (IMAGE) University of Pennsylvania Caption Del-1, a protein previously found to be involved in staving off gum disease, has been found in the brain, where it may play a role in multiple sclerosis and Alzheimer's disease. Credit Courtesy of University of Pennsylvania Usage Restrictions In context of reporting 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.