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Chronic haloperidol treatment results in a decrease in the expression of myelin/oligodendrocyte-related genes in the mouse brain

Academic Article
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Overview

authors

  • Narayan, S.
  • Kass, K. E.
  • Thomas, Elizabeth

publication date

  • March 2007

journal

  • Journal of Neuroscience Research  Journal

abstract

  • Schizophrenia is a complex psychiatric illness that manifests as a combination of positive symptoms, negative symptoms, and cognitive deficits. Antipsychotic drugs, such as haloperidol, attenuate dopamine receptor signaling in neurons and constitute the frontline treatment for the positive symptoms of schizophrenia. However, haloperidol treatment has also been reported to exacerbate preexisting negative symptoms/cognitive deficits and the severity of these deficits has been correlated with white matter pathology in schizophrenia. Indeed, several studies implicate oligodendrocyte function in the pathophysiology of schizophrenia, but it is unknown whether these effects are related to drug treatment. It is well established that haloperidol alters gene expression in neurons. However, its effect on oligodendrocytes is unknown. In this study, we investigate the effects of chronic haloperidol treatment on the expression of eight genes known to play critical roles in myelin/oligodendrocyte function. We treated male mice with haloperidol (2 mg/kg/day) for 30 days and measured gene expression changes by using in situ hybridization analysis and quantitative densitometry. Haloperidol caused a decrease in the expression of these genes in several white matter regions of the mouse CNS. In contrast, clozapine (10 mg/kg/day) had no effect on the expression of a subset of these genes. This has important implications for both disease pathology and the consideration of treatment options for patients.

subject areas

  • Analysis of Variance
  • Animals
  • Antipsychotic Agents
  • Brain
  • Clozapine
  • Drug Administration Schedule
  • Gene Expression Regulation
  • Haloperidol
  • In Situ Hybridization
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Myelin-Associated Glycoprotein
  • Nerve Tissue Proteins
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Research

keywords

  • antipsychotic
  • dopamine
  • haloperidol
  • oligodendrocyte
  • schizophrenia
  • white matter
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Identity

International Standard Serial Number (ISSN)

  • 0360-4012

Digital Object Identifier (DOI)

  • 10.1002/jnr.21161

PubMed ID

  • 17177202
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Additional Document Info

start page

  • 757

end page

  • 765

volume

  • 85

issue

  • 4

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