Fig. 4From: Extract of Bletilla formosana callus elevates cellular antioxidative activity via Nrf2/HO-1 signaling pathway and inhibits melanogenesis in zebrafishThe mRNA expression levels of antioxidant genes were measured in Hs68 fibroblast cells. A mRNA expression levels of four antioxidation-related genes, Nrf2, CAT, SOD, and GPx, in cells treated with 200 μg/mL of callus extract for 6 h and 24 h. B HO-1 mRNA expression in cells treated with 100 μg/mL and 200 μg/mL for 6 h and 24 h. C NQO1 mRNA expression in cells treated with 100 μg/mL and 200 μg/mL for 6 h and 24 h. Data are presented as means ± SD of triplicate experiments. *p < 0.05, **p < 0.01, and ***p < 0.001 compare with controlBack to article page