Fig. 1
Effects of the four extract fractions on cell viability (a), catalase activity (b), and levels of glutathione (GSH) (c), Nitric Oxide(NO) (d) and malondialdehyde (MDA) (e) in human umbilical vein endothelial cells subjected to H2O2-induced oxidative stress. *P < 0.05 vs. control. #P < 0.05 vs. H2O2 alone. n = 12. Con: control; PEF: petroleum ether fraction; EAF: ethyl acetate fraction; NBF: n-butanol fraction; AQF: aqueous fraction