Effect of resveratrol and equol on mRNA expression of PGC1-α (A), NRF-1 (B), TFAM (C) in HUVEC. qRT-PCR measurement to assess the mRNA expression of the mitochondrial biogenesis factors. Representative data of at least 3 experiments each performed in triplicate. (*= P < 0.05, **= P < 0.01). C: control; E: equol; R: resveratrol; E+R: equol + resveratrol.