title: Hydrogen peroxide toxicity induces Ras signaling in human neuroblastoma SH-SY5Y cultured cells.
abstract: It has been reported that overproduction of reactive oxygen species occurs after brain injury and mediates neuronal cells degeneration. In the present study, we examined the role of Ras signaling on hydrogen peroxide-induced neuronal cells degeneration in dopaminergic neuroblastoma SH-SY5Y cells. Hydrogen peroxide significantly reduced cell viability in SH-SY5Y cultured cells. An inhibitor of the enzyme that catalyzes the farnesylation of Ras proteins, FTI-277, and a competitive inhibitor of GTP-binding proteins, GDP-beta-S significantly decreased hydrogen peroxide-induced reduction in cell viability in SH-SY5Y cultured cells. The results of this study might indicate that a Ras-dependent signaling pathway plays a role in hydrogen peroxide-induced toxicity in neuronal cells.
authors.affiliation: Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand. grbcs@mahidol.ac.th
authors.forename: Jirapa
authors.initials: J
authors.lastname: Chetsawang
authors.forename: Piyarat
authors.initials: P
authors.lastname: Govitrapong
authors.forename: Banthit
authors.initials: B
authors.lastname: Chetsawang
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D006801:Humans; D006861:Hydrogen Peroxide / Q000378:metabolism* / Q000633:toxicity*; D009447:Neuroblastoma / Q000378:metabolism* / Q000473:pathology*; D015398:Signal Transduction / Q000187:drug effects*; D018631:ras Proteins / Q000378:metabolism*
chemical_list: D006861:Hydrogen Peroxide; D018631:ras Proteins