Involvement of serotonin 2A receptors in phencyclidine-induced disruption of prepulse inhibition of the acoustic startle in rats.
Biol Psychiatry
; 46(6): 832-8, 1999 Sep 15.
Article
em En
| MEDLINE
| ID: mdl-10494453
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.
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Base de dados:
MEDLINE
Assunto principal:
Fenciclidina
/
Percepção Auditiva
/
Reflexo de Sobressalto
/
Receptores de Serotonina
/
Inibidores Enzimáticos
/
Frequência Cardíaca
/
Inibição Neural
Limite:
Animals
Idioma:
En
Revista:
Biol Psychiatry
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Japão