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Effects of 1,25-dihydroxyvitamin D (1,25(OH)2D) on gene expression involved in mitochondrial biogenesis (A), antioxidant enzymes (B), myogenesis (C), and vitamin D metabolism (D). mRNA levels were determined by RT-PCR and normalized for all samples to β-actin. The value of each bar represents mean ± SEM. Experiments represent two independent experiments (n = 8 per group). * p < 0.05, ** p < 0.01 compared to vehicle control. # p < 0.05, ## p < 0.01 compared to tBHP control.
