title: Protective effect of Artemisia douglasiana Besser extracts in gastric mucosal injury.
abstract: The aim of this work was to evaluate markers of oxidative stress in ethanol-induced gastric ulcers and the protective antioxidant activity in-vivo of Artemisia douglasiana Besser extracts in ethanol-treated rats. Ethanol-induced oxidative damage is believed to be associated with generation of reactive oxygen molecules, which leads to oxidative stress. A. douglasiana is used in folk medicine as a cytoprotective agent against peptic ulcer. Different bioassays were performed: in-vivo stomach chemiluminescence, tert-butyl hydroperoxide initiated chemiluminescence (in-vitro chemiluminescence), total antioxidant capacity (TRAP) and catalase, superoxide dismutase (SOD) and glutathione peroxidase (GPx) activity in stomach homogenates. When ethanol (3 g kg(-1)) was administered, the in-vivo chemiluminescence increased by 107%, in-vitro chemiluminescence by 108%, SOD by 130% (P < 0.001), and catalase and TRAP decreased by 43 and 59% (P < 0.05 and 0.001, respectively). A. douglasiana (400 mg kg(-1)) pretreatment decreased in-vivo chemiluminescence by 41% (P < 0.05), in-vitro chemiluminescence by 66% (P < 0.001) and SOD by 56% (P < 0.001) and increased catalase by 14% and TRAP by 168% (P < 0.001, respectively) but GPx activity was not significantly different from the ethanol group. These results illustrate the significant antioxidant activity of A. douglasiana extract in-vivo and in-vitro.
authors.affiliation: Cátedra de Química General e Inorgánica, Departamento de Química Analítica y Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 (1113), Buenos Aires, Argentina.
authors.forename: Marisa
authors.initials: M
authors.lastname: Repetto
authors.forename: Alejandra
authors.initials: A
authors.lastname: María
authors.forename: Jorge
authors.initials: J
authors.lastname: Guzmán
authors.forename: Oscar
authors.initials: O
authors.lastname: Giordano
authors.forename: Susana
authors.initials: S
authors.lastname: Llesuy
mesh_terms: D000818:Animals; D000897:Anti-Ulcer Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D000975:Antioxidants / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D019306:Artemisia; D000431:Ethanol; D005260:Female; D008163:Luminescent Measurements; D018384:Oxidative Stress; D010437:Peptic Ulcer / Q000139:chemically induced / Q000188:drug therapy / Q000378:metabolism*; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D018515:Plant Leaves; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000897:Anti-Ulcer Agents; D000975:Antioxidants; D010936:Plant Extracts; D000431:Ethanol