title: Sub-chronical exposure to diphenyl diselenide enhances acquisition and retention of spatial memory in rats.
abstract: The present study was conducted to evaluate the effects of exposure to diphenyl diselenide [(PhSe)2] on cognitive performance and glutamatergic parameters in normal Wistar rats. Animals were subcutaneously exposed to (PhSe)2 acutely (G1) and sub-chronically for 4 weeks (G20) at the dose of 5.0 mg/kg or 8 weeks (G40) at the dose of 2.5 mg/kg and evaluated for behavioral and neurochemical analyses. In the water-maze, a significant increase in the number of crossing in the platform local was observed in the probe trial for both groups exposed to (PhSe)2 (G20 and G40). In the T-maze, the latency to reach the extremity of the arm in the trial 2 was lower in both groups exposed to (PhSe)2 (G20 or G40) when compared to the respective control groups. In the open-field test, no significant differences in the number of crossing and rearing were observed among groups. Furthermore, the basal [3H]glutamate release by synaptosomes from whole brain of rats was significantly decreased in the G40 when compared to the control group. These findings suggest that sub-chronic exposure to (PhSe)2 improved the performance of Wistar rats in the water-maze, a test that evaluates cognitive functions.
authors.affiliation: Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, SM, RS, CEP 97105-900 Santa Maria, Brazil.
authors.forename: Eluza Curte
authors.initials: EC
authors.lastname: Stangherlin
authors.forename: Cristiane
authors.initials: C
authors.lastname: Luchese
authors.forename: Simone
authors.initials: S
authors.lastname: Pinton
authors.forename: Joao Batista Teixeira
authors.initials: JB
authors.lastname: Rocha
authors.forename: Cristina Wayne
authors.initials: CW
authors.lastname: Nogueira
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology; D001555:Benzene Derivatives / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D004734:Energy Metabolism / Q000187:drug effects / Q000502:physiology; D018698:Glutamic Acid / Q000378:metabolism; D008297:Male; D018782:Maze Learning / Q000187:drug effects* / Q000502:physiology; D008568:Memory / Q000187:drug effects* / Q000502:physiology; D018697:Nootropic Agents / Q000494:pharmacology*; D016566:Organoselenium Compounds / Q000494:pharmacology*; D010084:Oxidation-Reduction / Q000187:drug effects; D018384:Oxidative Stress / Q000187:drug effects / Q000502:physiology; D017729:Presynaptic Terminals / Q000187:drug effects / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D011930:Reaction Time / Q000502:physiology; D013028:Space Perception / Q000187:drug effects* / Q000502:physiology; D013574:Synaptosomes / Q000187:drug effects / Q000378:metabolism
chemical_list: D000975:Antioxidants; D001555:Benzene Derivatives; D018697:Nootropic Agents; D016566:Organoselenium Compounds; C061132:diphenyldiselenide; D018698:Glutamic Acid