Hajishengalis main (IMAGE) University of Pennsylvania Caption Chemical staining of knee joint tissue sections reveals increased cartilage loss in an animal model with DNMT3A-driven CHIP (right) compared to a control (left). Credit (Image: Courtesy of Hui Wang) Usage Restrictions Contact authors for redistribution rights. 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.