Super Mice (IMAGE) Washington University School of Medicine Caption Researchers at Washington University School of Medicine in St. Louis found that gene therapy in mice helped build strength and significant muscle mass quickly, while reducing the severity of osteoarthritis. The gene therapy also prevented obesity, even when the mice were fed a high-fat diet. Credit Mike Worful 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.