期刊
EUROPEAN NEUROPSYCHOPHARMACOLOGY
卷 14, 期 6, 页码 487-495出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.euroneuro.2004.01.004
关键词
animal model; anxiety; depression; serotonin; serotonin reuptake inhibitor
Fluoxetine, a selective serotonin reuptake inhibitor, shows moderate efficacy and potency in the rat forced swimming depression test and the shock-induced ultrasonic vocalization anxiety test, whereas the 5-HT1A receptor agonist (+/-)-8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) is highly efficient and potent in both models. Whereas the 5-HT1A receptor antagonist WAY 100,635 abolishes the effect of 8-OH-DPAT in both models, it only attenuates the antidepressant-like effect of fluoxetine. Pretreatment with the 5-HT-depleting agent parachlorophenylalanine attenuates the antidepressant-like effect of fluoxetine, but not that of 8-OH-DPAT. This suggests that the antidepressant-like effect of fluoxetine and 8-OH-DPAT results from indirect (via increased synaptic availability of 5-HT) and direct stimulation of postsynaptic 5-HT1A receptors, respectively; whereas the anxiolytic-like effect of fluoxetine is not mediated by 5-HT1A receptors. The data support the hypothesis that the antidepressant- and anxiolytic-like effect of 8-OH-DPAT is predominantly mediated by post- and presynaptic 5-HT1A receptors, respectively, and that 5-HT1A receptors are only partially involved in the antidepressant-like effect of fluoxetine. (C) 2004 Elsevier B.V. and ECNP. All rights reserved.
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