title: Diphenyl diselenide reverses gastric lesions in rats: Involvement of oxidative stress.
abstract: The aim of the present study was to evaluate if diphenyl diselenide administered by oral route was effective in restoring gastric lesions induced by ethanol. The possible involvement of oxidative stress in diphenyl diselenide antiulcer effect was also evaluated. Different doses of diphenyl diselenide (dissolved in soya bean oil, 1mL/kg) were administered orally 1h before (pre-treatment study) or 1h after ethanol (70%, v/v, 2mL/kg, post-treatment study). Ulcer lesions were quantified 1h after ethanol administration (pre-treatment protocol) or 1h after diphenyl diselenide study (post-treatment protocol). Diphenyl diselenide (0.1-10mg/kg or 0.32-32micromol/kg), when administered previously or posteriorly prevented and reversed respectively, the development of gastric lesions induced by ethanol in rats. A number of markers of oxidative stress were examined in rat stomach including thiobarbituric acid reactive species (TBARS), catalase (CAT), superoxide dismutase (SOD), non-protein thiol groups (NPSH) and ascorbic acid. In addition to attenuating the gastric lesions, low doses of diphenyl diselenide prevented (pre-treatment) or reversed (post-treatment) the ethanol-induced changes in TBARS, SOD activity and ascorbic acid content. In conclusion, the present data reveal that diphenyl diselenide, administered by oral route, possesses an antiulcer effect by modulating antioxidant mechanisms.
authors.affiliation: Departamento de Química, Centro de Ciências Naturais e Exatas, Programa de Pos-Graduacao em Bioquimica Toxicologica, Universidade Federal de Santa Maria 97105-900, RS, Brazil.
authors.forename: R P
authors.initials: RP
authors.lastname: Ineu
authors.forename: M E
authors.initials: ME
authors.lastname: Pereira
authors.forename: M
authors.initials: M
authors.lastname: Aschner
authors.forename: C W
authors.initials: CW
authors.lastname: Nogueira
authors.forename: G
authors.initials: G
authors.lastname: Zeni
authors.forename: J B T
authors.initials: JB
authors.lastname: Rocha
mesh_terms: D000818:Animals; D000897:Anti-Ulcer Agents; D001205:Ascorbic Acid / Q000378:metabolism; D001555:Benzene Derivatives / Q000494:pharmacology*; D002374:Catalase / Q000378:metabolism; D000431:Ethanol; D007413:Intestinal Mucosa / Q000473:pathology; D015227:Lipid Peroxidation / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D016566:Organoselenium Compounds / Q000494:pharmacology*; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar; D013276:Stomach Ulcer / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology; D013438:Sulfhydryl Compounds / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism
chemical_list: D000897:Anti-Ulcer Agents; D001555:Benzene Derivatives; D016566:Organoselenium Compounds; D013438:Sulfhydryl Compounds; D017392:Thiobarbituric Acid Reactive Substances; C061132:diphenyldiselenide; D000431:Ethanol; D002374:Catalase; D013482:Superoxide Dismutase; D001205:Ascorbic Acid