CAT and ischemia: Another study showed the therapeutic effect of MSCs on damaged small intestine tissue from humans with intestinal ischemia/reperfusion was associated with increased antioxidant capacity and decreased oxidative stress, as indicated by a lower level of MDA and increased activities of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (Gpx) (Inan et al. 2017).