Involvement of serotonin 2A receptors in phencyclidine-induced disruption of prepulse inhibition of the acoustic startle in rats.

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Yamada S, Harano M, Annoh N, Nakamura K, Tanaka M

Involvement of serotonin 2A receptors in phencyclidine-induced disruption of prepulse inhibition of the acoustic startle in rats.

Biol Psychiatry. 1999 Sep 15;46(6):832-8.

PubMed ID

10494453 [ View in PubMed

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Abstract

BACKGROUND: The disruption of prepulse inhibition of acoustic startle (PPI) is an animal model for some aspects of schizophrenia. Phencyclidine causes psychotomimetic symptoms in human and disrupts PPI in animals, however, the mechanism underlying this disruption remains unclear. The present experiment tested the hypothesis that serotonin 2A receptor blocking property of drugs reverses the phencyclidine-induced PPI disruption. METHODS: The ED50 value of spiperone, haloperidol, chlorpromazine, clozapine, risperidone, olanzapine, seroquel, pipamperone, mianserin, or desipramine to reverse the phencyclidine- or apomorphine-induced PPI disruption in rats was determined. Then the correlation between the ED50 value and the affinity for the serotonin 2A, 2C, dopamine D2, or alpha-1 receptor of each drug was examined. RESULTS: The ED50 value of the drugs to reverse the phencyclidine-induced PPI disruption was significantly correlated with the affinity for the serotonin 2A receptor, but not for the dopamine D2, serotonin 2C, or alpha-1 receptor of each drug. In contrast, the ED50 value of the drugs to reverse the apomorphine-induced PPI disruption was significantly correlated with the affinity for the dopamine D2 receptor, but not for the serotonin 2A receptor. CONCLUSIONS: An activation of serotonin 2A receptors would mediate the phencyclidine-induced PPI disruption.

DrugBank Data that Cites this Article

Drug Targets

Drug	Target	Kind	Organism	Pharmacological Action	Actions
Apomorphine	Dopamine D2 receptor	Protein	Humans	Yes	Agonist	Details