Knee Joints (IMAGE) Scripps Research Institute Caption These are images of knee joints from control and FoxO deficient mice. The areas in red are joint cartilage which is destroyed in FoxO deficient mice after treadmill running. Credit Lotz Lab, The Scripps Research Institute 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.