Neuropsychopharmacological study on an animal model for negative symptom of schizophrenia induced by repeated phencyclidine treatment

Y. Noda, T. Nabeshima

Research output: Contribution to journalReview article

8 Citations (Scopus)

Abstract

To develop an animal model for negative symptoms, in particular avolition, of schizophrenia, the effect of phencyclidine (PCP) on immobility (regarded as avolition) in the forced swimming test was investigated in mice, since PCP produces negative symptoms in humans. Unlike single, repeated treatment with PCP prolonged the immobility time in the forced swimming test 24 h after the final injection compared with saline treatment. The enhancing effect of PCP on the immobility persisted for 21 d after the withdrawal of the drug. Atypical antipsychotics attenuated the enhancing effect of PCP on the immobility. Since these attenuating effects were antagonized by a serotonin-S2 receptor agonist, (±)-2,5-dimethoxy-4-iodamphetamine (DOI), the effects may be mediated via serotonin-S2 receptors. In contrast with atypical antipsychotics, typical antipsychotics, antidepressants and anxiolytics had no effect. No functional changes in post-synaptic serotonin-S2 receptors were observed in PCP-treated mice following the forced swimming test. Serotonin utilization in the prefrontal cortex was increased, but dopamine utilization was decreased in PCP-treated mice showing the enhancement of immobility. The enhancing effect of PCP was significantly attenuated by D-cycloserine, an agonist for glycine binding site of N-methyl-D-aspartate (NMDA) receptor ionophore complex. Decreases of NMDA receptor function or of the cortical glutamate and glycine levels were observed in PCP-treated mice showing the enhancement of immobility. These results suggest that the enhancing effect of PCP on immobility is mediated by the imbalance of the cortical serotonergic, dopaminergic and glutamatergic systems and could be used as an animal model for negative symptoms of schizophrenia.

Original languageEnglish
Pages (from-to)677-682
Number of pages6
JournalYakugaku Zasshi
Volume120
Issue number8
DOIs
Publication statusPublished - 01-01-2000

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Pharmaceutical Science

Fingerprint Dive into the research topics of 'Neuropsychopharmacological study on an animal model for negative symptom of schizophrenia induced by repeated phencyclidine treatment'. Together they form a unique fingerprint.

  • Cite this