title: Rutin inhibits hydrogen peroxide-induced apoptosis through regulating reactive oxygen species mediated mitochondrial dysfunction pathway in human umbilical vein endothelial cells.
abstract: Apoptosis of human vein endothelium cell caused by reactive oxygen species is implicated in the pathogenesis of cardiovascular diseases. Rutin, an active flavonoid compound, is well known to possess potent antioxidant properties against oxidative stress insults through undefined mechanism(s). In this study, we first investigated the possible protective effects of rutin against apoptosis of human umbilical vein endothelial cells (HUVECs) induced by hydrogen peroxide (H(2)O(2)) and the associated signaling pathways. Decreased viability and increased apoptosis were observed in the HUVECs incubated with 200microM H(2)O(2) for 12h. By examining the effect of rutin on H(2)O(2)-induced apoptosis in HUVECs, we found that rutin pretreatment significantly attenuated H(2)O(2)-induced apoptosis in HUVECs. We next examined the signaling involved in rutin-mediated anti-apoptotic effects. It was found that rutin pretreatment attenuated excessive reactive oxygen species in HUVECs exposed to H(2)O(2). Rutin also prevented the increased DNA fragment formation and glutathione (GSH) depletion and inhibited the collapse of mitochondrial membrane potentials (DeltaPsim) that occurred in HUVECs exposed to H(2)O(2), which protected HUVECs against oxidative damage and the further mitochondrial membrane integrity impairment, leading to apoptosis. In conclusion, the results suggested that rutin (50microM) blocked apoptosis in HUVECs through decreasing reactive oxygen species, increasing GSH, restoring DeltaPsim and thus protecting DNA damage. Our research indicated that rutin protected the intracellular GSH antioxidant system and prevented H(2)O(2)-induced apoptosis of HUVECs through regulating reactive oxygen species mediated mitochondrial dysfunction pathway.
authors.affiliation: Institute for Nanobiomedical Technology and Membrane Biology, State Key Lab of Biotherapy of Human Diseases, Cancer Center, West China Hospital, West China Medical School, Sichuan University, Sichuan, PR China.
authors.forename: Guohua
authors.initials: G
authors.lastname: Gong
authors.forename: Yuan
authors.initials: Y
authors.lastname: Qin
authors.forename: Wen
authors.initials: W
authors.lastname: Huang
authors.forename: Shu
authors.initials: S
authors.lastname: Zhou
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Yang
authors.forename: Dan
authors.initials: D
authors.lastname: Li
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D002467:Cell Nucleus / Q000187:drug effects / Q000235:genetics; D003603:Cytotoxins / Q000037:antagonists & inhibitors; D053938:DNA Fragmentation / Q000187:drug effects; D042783:Endothelial Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D006801:Humans; D006861:Hydrogen Peroxide / Q000633:toxicity*; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D008928:Mitochondria / Q000187:drug effects / Q000378:metabolism*; D009569:Nitric Oxide / Q000096:biosynthesis; D017382:Reactive Oxygen Species / Q000378:metabolism*; D012431:Rutin / Q000494:pharmacology*; D014471:Umbilical Veins / Q000166:cytology*
chemical_list: D003603:Cytotoxins; D017382:Reactive Oxygen Species; D009569:Nitric Oxide; D012431:Rutin; D006861:Hydrogen Peroxide; D005978:Glutathione