Repeated phencyclidine treatment induces negative symptom-like behavior in forced swimming test in mice: Imbalance of prefrontal serotonergic and dopaminergic functions

Yukihiro Noda, Hiroyuki Kamei, Takayoshi Mamiya, Hiroshi Furukawa, Toshitaka Nabeshima

研究成果: Article

88 引用 (Scopus)

抄録

Repeated treatment with phencyclidine (PCP) prolonged the immobility time in a forced swimming test, compared with saline treatment, this behavioral change being regarded as avolition which is one of the negative symptoms of schizophrenia. In the present study, we investigated an involvement of serotonergic (5-HTergic) and dopaminergic systems in PCP- induced enhancement of immobility in mice, since an alteration in 5-HTergic and dopaminergic systems has been hypothesized in schizophrenia. The enhancing effect of PCP on the immobility in a forced swimming test was attenuated by clozapine, risperidone and olanzapine, which have serotonin (5- HT) and dopamine receptor antagonistic properties. These attenuating effects were significantly antagonized by a 5-HT2 receptor agonist, (±)-2,5- dimethoxy-4-iodamphetamine (DOI) without affecting the immobility itself. (- )Sulpiride at a low dose and methylphenidate reversed the PCP-induced enhancement of immobility whereas pimozide, chlorpromazine and levomepromazine had no effect. There was no difference in the frequency of DOI-induced head twitches, which are mediated via 5-HT2 receptors, between PCP- and saline-treated mice following the forced swimming test, indicating no functional changes in post-synaptic 5-HT2 receptors. 5-HT utilization in the prefrontal cortex was increased, but dopamine utilization was decreased in mice showing PCP-induced enhancement of immobility. These results suggest that the enhanced effect of PCP on the immobility is mediated by imbalance of 5-HTergic and dopaminergic systems in the prefrontal cortex and could be used as a model of the negative symptoms of schizophrenia. (C) 2000 American College of Neuropsychopharmacology.

元の言語English
ページ(範囲)375-387
ページ数13
ジャーナルNeuropsychopharmacology
23
発行部数4
DOI
出版物ステータスPublished - 01-10-2000
外部発表Yes

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Phencyclidine
Schizophrenia
olanzapine
Prefrontal Cortex
Phencyclidine Receptors
Methotrimeprazine
Serotonin 5-HT2 Receptor Agonists
Pimozide
Sulpiride
Methylphenidate
Risperidone
Clozapine
Serotonin Receptors
Chlorpromazine
Dopamine Receptors
Dopamine
Serotonin
Head

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Psychiatry and Mental health

これを引用

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