SIRT1 and endothelial dysfunction: Moreover, SIRT1 deacetylates FoxO proteins and thus stimulates FoxO-dependent anti-oxidative enzymes, such as catalase (CAT), manganese superoxide dismutase (MnSOD), and thioredoxin (TRX), eliminating ROS from endothelial cells and thus preventing endothelial dysfunction [132,134,135].