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- W1969798938 abstract "Earlier studies have demonstrated that the agonists of the mGlu(2/3) receptors produced anxiolytic actions after peripheral administration. However, the mechanism of their action is still not clear. Therefore the aim of the present study was to specify the role of the GABAergic and serotonergic system in the mechanism of the anxiolytic activity of group II mGlu receptor activators by using the stress induced hyperthermia test (SIH) in singly housed mice. We used an orthosteric mGlu(2/3) receptor agonist, LY379268, which induced anti-hyperthermic efficacy in the doses of 1-5mg/kg (73% of inhibition after a highest dose). The effect of the second ligand used, a mGlu(2) receptor positive modulator (PAM), LY487379, was observed in a dose range of 0.5-5mg/kg and reached 53% of the inhibition. The blockade of GABAergic system by GABA(A) receptor antagonist flumazenil (10mg/kg) or GABA(B) receptor antagonist CGP55845 (10mg/kg), and the blockade of serotonergic system by 5-HT(1A) receptor antagonist WAY100635 (0.1 and 1mg/kg) or 5-HT(2A/2C) receptor antagonist ritanserin (0.5mg/kg) had no influence on the anti-hyperthermic effect induced by effective dose of LY379268. However, the action of the effective dose of LY487379 was enhanced when co-administered with flumazenil, WAY100635 (0.1mg/kg) and ritanserin. Similar results were observed for the subeffective dose of LY379268 (0.5mg/kg). WAY100635 in a dose of 1mg/kg did not induce any enhancing effect on the activity of compounds. Therefore, it seems that the antagonism towards GABA(A) receptors, presynaptic 5-HT(1A) and postsynaptic 5-HT(2A/2C) receptors is responsible for the phenomenon. This article is part of a Special Issue entitled 'Anxiety and Depression'." @default.
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- W1969798938 date "2012-01-01" @default.
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- W1969798938 title "On the mechanism of anti-hyperthermic effects of LY379268 and LY487379, group II mGlu receptors activators, in the stress-induced hyperthermia in singly housed mice" @default.
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- W1969798938 doi "https://doi.org/10.1016/j.neuropharm.2011.07.042" @default.
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