Real-time PCR for mRNA expression of genes related to enzymatic antioxidant defense and DNA repair, normalized by beta-actin. (A) Sod1. (B) Sod2. (C) Ogg1. (D) MutY. Each experiment was performed in duplicate and is represented as the mean ± S.E of five mice in each group. (a p < 0.01 compared with chow diet; b p < 0.01 compared with high fat diet by Wilcoxon rank-sum test).