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Increase in liver antioxidant enzyme activities in non‐alcoholic fatty liver disease

Abstract: Aims: Steatosis may increase oxidative stress, which is counteracted by cellular enzymatic (cytosolic and mitochondrial superoxide dismutases (Cu/Zn‐SOD and Mn‐SOD), glutathione peroxidase (GPx), catalase) and non‐enzymatic antioxidant systems. We aimed to determine, in patients with non‐alcoholic fatty liver disease (NAFLD), the level of antioxidant defenses (1) in liver biopsies, to demonstrate the existence of oxidative stress; (2) in erythrocytes and plasma, to determine whether their antioxidant defenses reflect liver oxidative stress.