Journal
BEHAVIOURAL BRAIN RESEARCH
Volume 188, Issue 2, Pages 324-328Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbr.2007.11.013
Keywords
agmatine; forced swimming tests; anxiety; locomotion
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The aim of this study was to characterize the behavioral effects of systemically administered agmatine in animal models predictive of antidepressant- and anxiolytic-like activity and clarify whether the effects of agmatine depend on the intact serotonergic system. Only the highest dose of agmatine tested (50 mg/kg) decreased immobility of mice in the forced swimming test. The magnitude of the effect was slightly smaller than that of the tricyclic antidepressant imipramine (15 mg/kg). Agmatine did not change the locomotion of mice in the open field. Pretreatment with the tryptophane hydroxylase inhibitor PCPA for 3 days resulted in more than 70% drop in the tissue levels of 5-HT and 5-HIIA but did not counteract the antidepressant-like effect of agmatine. The administration of agmatine did not modify behavior of animals in the light-dark compartment test of anxiety. We conclude that the antidepressant-like effect of agmatine seems not to be mediated by the serotonergic system. We failed to confirm the reported anxiolytic-like activity of agmatine. (C) 2007 Elsevier B.V. All rights reserved.
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