title: Effect of acute administration of 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one on oxidative stress in cerebral cortex, hippocampus, and cerebellum of rats.
abstract: Organotellurium compounds have been synthesized since 1840, but pharmacological and toxicological studies about them are still incipient. Therefore, the objective of this study was to verify the effect of acute administration of the organochalcogen 3-butyl-1-phenyl-2-(phenyltelluro)oct-en-1-one on some parameters of oxidative stress in the brain of 30-day-old rats. Animals were treated intraperitoneally with a single dose of the organotellurium (125, 250, or 500 μg/kg body weight) and sacrificed 60 min after the injection. The cerebral cortex, the hippocampus, and the cerebellum were dissected and homogenized in KCl. Afterward, thiobarbituric acid reactive substances (TBARS), carbonyl, sulfhydryl, catalase (CAT), superoxide dismutase (SOD), nitric oxide (NO) formation, and hydroxyl radical production were measured in the brain. The organotellurium enhanced TBARS in the cerebral cortex and the hippocampus, and increased protein damage (carbonyl) in the cerebral cortex and the cerebellum. In contrast, the compound provoked a reduced loss of thiol groups measured by the sulfhydryl assay in all the tissues studied. Furthermore, the activity of the antioxidant enzyme CAT was reduced by the organochalcogen in the cerebral cortex and the cerebellum, and the activity of SOD was inhibited in all the brain tissues. Moreover, NO production was increased in the cerebral cortex and the cerebellum by this organochalcogen, and hydroxyl radical formation was also enhanced in the cerebral cortex. Our findings indicate that this organotellurium compound induces oxidative stress in the brain of rats, corroborating that this tissue is a potential target for organochalcogen action.
authors.affiliation: Centro Universitário Metodista IPA, Rua Cel Joaquim Pedro Salgado, Porto Alegre, RS, Brazil. claudia.funchal@metodistadosul.edu.br
authors.forename: Cláudia
authors.initials: C
authors.lastname: Funchal
authors.forename: Carlos Augusto Souza
authors.initials: CA
authors.lastname: Carvalho
authors.forename: Tanise
authors.initials: T
authors.lastname: Gemelli
authors.forename: Andressa S
authors.initials: AS
authors.lastname: Centeno
authors.forename: Robson Brum
authors.initials: RB
authors.lastname: Guerra
authors.forename: Mirian
authors.initials: M
authors.lastname: Salvador
authors.forename: Caroline
authors.initials: C
authors.lastname: Dani
authors.forename: Adriana
authors.initials: A
authors.lastname: Coitinho
authors.forename: Rosane
authors.initials: R
authors.lastname: Gomez
mesh_terms: D000818:Animals; D002374:Catalase / Q000378:metabolism; D002531:Cerebellum / Q000187:drug effects* / Q000378:metabolism; D002540:Cerebral Cortex / Q000187:drug effects* / Q000378:metabolism; D006624:Hippocampus / Q000187:drug effects* / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism; D009942:Organometallic Compounds / Q000494:pharmacology*; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar; D013482:Superoxide Dismutase / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism
chemical_list: C540925:3-butyl-1-phenyl-2-(phenyltelluro)oct-2-en-1-one; D009942:Organometallic Compounds; D017392:Thiobarbituric Acid Reactive Substances; D009569:Nitric Oxide; D002374:Catalase; D013482:Superoxide Dismutase