Microglia cells (IMAGE) University of Cincinnati Caption A 3-D rendered confocal image shows a single TGF- β1 knockout microglia being activated while it is surrounded by normal microglia that do not have the gene deletion. Credit Photo provided by Agnes (Yu) Luo. Usage Restrictions None License Original 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.