Involvement of Serotonin Receptor Mechanisms in the Discriminative Stimulus Effects of Ketamine in Rats

We have demonstrated previously that the ketamine-induced discriminative stimulus effect is likely to reflect the phencyclidine-like psychotomimetic effects. Therefore, the present study was designed to investigate the effects of the antipsychotics and 5-HT2 receptor antagonist on the discriminative...

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Bibliographic Details
Main Authors: Kazumi Yoshizawa, Tomohisa Mori, Tamami Ueno, Mizuki Nishiwaki, Masahiro Shibasaki, Norifumi Shimizu, Minoru Narita, Tsutomu Suzuki
Format: Article
Language:English
Published: Elsevier 2013-01-01
Series:Journal of Pharmacological Sciences
Online Access:http://www.sciencedirect.com/science/article/pii/S1347861319303743
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Summary:We have demonstrated previously that the ketamine-induced discriminative stimulus effect is likely to reflect the phencyclidine-like psychotomimetic effects. Therefore, the present study was designed to investigate the effects of the antipsychotics and 5-HT2 receptor antagonist on the discriminative stimulus effects of ketamine in rats. While sulpiride did not attenuate the discriminative stimulus effects of ketamine, both clozapine and ketanserin attenuated those of ketamine, suggesting that the discriminative stimulus effects of ketamine are mediated by multiple receptors, especially the 5-HT2 receptor, but not the D2 receptor. Furthermore, our findings imply that atypical antipsychotics could be useful for the treatment of psychotomimetic effects induced by ketamine. Keywords:: atypical antipsychotic, 5-HT2 receptor, ketamine
ISSN:1347-8613