Hypercholesterolemic diet induces hepatic steatosis and alterations in mRNA expression of NADPH oxidase in rat livers

Dieta hipercolesterolemiante induz esteatose hepática e alterações na expressão de mRNA da NADPH oxidase em fígados de ratos

Objective

: This study aimed to determine whether a hypercholesterolemic diet induces hepatic steatosis, alterations in mRNA expression of NADPH oxidase subunits, and antioxidant defenses.

Materials and methods

: Fischer rats were divided into two groups of eight animals according to the treatment, control (C) and hypercholesterolemic diet (H). Those in group C were fed a standard diet (AIN-93M), and those of the group H were fed a hypercholesterolemic diet (25% soybean oil and 1% cholesterol).

Results

: The hypercholesterolemic diet did not affect body weight, but resulted in the accumulation of lipids in the liver, increased serum activities of aminotransferases and cholesterol levels. Biomarker of lipid peroxidation (TBARS) and mRNA expression of NADPH oxidase subunits p22^phox and p47^phox were increased in the liver of animals in group H. Besides, the activity and expression of antioxidant enzymes were altered.

Conclusion

: The results show increased mRNA expression of NADPH oxidase subunits and changes in antioxidant enzyme activities in diet-induced hepatic steatosis. Arq Bras Endocrinol Metab. 2014;58(3):251-9

Antioxidant enzymes; hepatic steatosis; hypercholesterolemic diet; NADPH oxidase; non-alcoholic fatty liver disease; oxidative stress