title: Diphenyl diselenide exerts anxiolytic-like effect in Wistar rats: putative roles of GABAA and 5HT receptors.
abstract: Diphenyl diselenide [(PhSe)2] is an organoselenium compound which presents pharmacological antioxidant, anti-inflammatory, antinociceptive and antidepressant properties. The present study was designed to investigate the anxiolytic effect of (PhSe)2 in rats, employing the elevated plus maze task. The involvement of 5HT and GABA receptors in the anxiolytic-like effect was also evaluated. (PhSe)2 (5, 25 and 50 micromol/kg, i.p.) did not affect locomotor activity as evaluated in the open open-field test, and learning and memory when assessed in the inhibitory foot-shock avoidance task. However, (PhSe)2 at the 50 micromol/kg dose produced signs of an anxiolytic action, namely a decreased number of fecal boli in the open-field arena and an increased time spent in as well as an increased number of entries to the open arms of the elevated plus maze test. To evaluate the role of GABA and 5HT receptors in the anxiolytic-like effect of (PhSe)2, a selective GABAA receptor antagonist bicuculline, (0.75 mg/kg, i.p.), a non-selective 5HT2A/2C receptor antagonist, ritanserin (2 mg/kg, i.p.), a selective 5HT2A receptor antagonist, ketanserin (1 mg/kg, i.p.), and a selective 5HT1A receptor antagonist, WAY100635 (0.1 mg/kg, i.p.) were used. All the antagonists used were able to abolish the anxiolytic effect of (PhSe)2 suggesting that GABAA and 5HT receptors may play a role in the pharmacological property of this selenocompound in the central nervous system.
authors.affiliation: Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil. bibighis@hotmail.com
authors.forename: Gabriele
authors.initials: G
authors.lastname: Ghisleni
authors.forename: Vanessa
authors.initials: V
authors.lastname: Kazlauckas
authors.forename: Fernanda L
authors.initials: FL
authors.lastname: Both
authors.forename: Natália
authors.initials: N
authors.lastname: Pagnussat
authors.forename: Sabrina
authors.initials: S
authors.lastname: Mioranzza
authors.forename: João Batista T
authors.initials: JB
authors.lastname: Rocha
authors.forename: Diogo O
authors.initials: DO
authors.lastname: Souza
authors.forename: Lisiane O
authors.initials: LO
authors.lastname: Porciúncula
mesh_terms: D000818:Animals; D014151:Anti-Anxiety Agents; D001362:Avoidance Learning / Q000187:drug effects; D001555:Benzene Derivatives / Q000494:pharmacology*; D001640:Bicuculline / Q000494:pharmacology; D003672:Defecation / Q000187:drug effects; D004597:Electroshock; D005106:Exploratory Behavior / Q000187:drug effects; D018756:GABA Antagonists / Q000494:pharmacology; D007650:Ketanserin / Q000494:pharmacology; D008297:Male; D016566:Organoselenium Compounds / Q000494:pharmacology*; D010879:Piperazines / Q000494:pharmacology; D011725:Pyridines / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D044282:Receptor, Serotonin, 5-HT1A / Q000187:drug effects; D044402:Receptor, Serotonin, 5-HT2A / Q000187:drug effects; D044405:Receptor, Serotonin, 5-HT2C / Q000187:drug effects; D011963:Receptors, GABA-A / Q000187:drug effects*; D011985:Receptors, Serotonin / Q000187:drug effects*; D016713:Ritanserin / Q000494:pharmacology; D012702:Serotonin Antagonists / Q000494:pharmacology
chemical_list: D014151:Anti-Anxiety Agents; D001555:Benzene Derivatives; D018756:GABA Antagonists; D016566:Organoselenium Compounds; D010879:Piperazines; D011725:Pyridines; D044402:Receptor, Serotonin, 5-HT2A; D044405:Receptor, Serotonin, 5-HT2C; D011963:Receptors, GABA-A; D011985:Receptors, Serotonin; D012702:Serotonin Antagonists; D044282:Receptor, Serotonin, 5-HT1A; D016713:Ritanserin; C061132:diphenyldiselenide; C090413:N-(2-(4-(2-methoxyphenyl)-1-piperazinyl)ethyl)-N-(2-pyridinyl)cyclohexanecarboxamide; D007650:Ketanserin; D001640:Bicuculline