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The antipsychotic trifluoperazine reduces marble-burying behavior in mice via D 2 and 5-HT 2A receptors: Implications for obsessive-compulsive disorder.
Pharmacology, Biochemistry, and Behavior 2018 Februrary
Trifluoperazine, a typical antipsychotic drug, not only antagonizes dopamine D2 receptors but also enhances serotonin 5-HT2 receptor-mediated behavior. Moreover, trifluoperazine suppresses human purinergic receptor P2X7 responses and calmodulin. However, the effect of trifluoperazine on marble-burying behavior, which has been considered an animal model of obsessive-compulsive disorder (OCD), has not been studied. Here, we examined the effect of trifluoperazine on marble-burying behavior in mice. Oral administration of paroxetine, a selective serotonin reuptake inhibitor, significantly reduced marble-burying behavior without affecting total locomotor activity. Similar results were obtained for trifluoperazine (3mg/kg). The D2 receptor agonist, quinpirole (0.03mg/kg, intraperitoneal [i.p.]), and 5-HT2A receptor antagonist, ketanserin (0.3mg/kg, i.p.), significantly counteracted this reduction of marble-burying behavior by trifluoperazine. These results show that trifluoperazine reduces marble-burying behavior via D2 and 5-HT2A receptors, and may be a useful drug for the treatment of OCD.
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