GSK3β promotes p53/Nrf2-dependent expression of the stress response protein REDD2 in retinal Müller glia exposed to hyperlipidemic conditions.

Summary: Imagine eating a diet very high in fat. Over time, this doesn't just affect your waistline; it can also cause stress in your eyes, specifically in special support cells called Müller glia that keep your retina healthy. Scientists recently discovered how these eye cells react to a high-fat environment. They found that a high-fat diet flips a biological switch called GSK3β. Once activated, this switch teams up with two other proteins (p53 and Nrf2) to sound an alarm, creating a stress-response protein named REDD2. REDD2 then acts like a brake pedal, slowing down cell growth to help the eye handle the fat overload. Understanding this unique alarm system could eventually help researchers find new ways to protect the vision of people with diabetes or high cholesterol.