GOOD: Scientists find key proteins control risk of osteoarthritis during aging. “The researchers noticed a striking difference in the mice with ‘knockout’ FoxO deficiency. Their cartilage degenerated at much younger age than in control mice. The FoxO-deficient mice also had more severe forms of post-traumatic osteoarthritis induced by meniscus damage (an injury to the knee), and these mice were more vulnerable to cartilage damage during treadmill running.”