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Chronic haloperidol treatment results in a decrease in the expression of myelin/oligodendrocyte-related genes in the
Sujatha Narayan1, Kristi E Kass, Elizabeth A Thomas
1Department of Molecular Biology, The Scripps Research Institute, La Jolla, California 92037, USA.
Journal of Neuroscience Research
|December 21, 2006
Summary
Haloperidol treatment in mice decreased the expression of genes crucial for myelin and oligodendrocyte function in the central nervous system (CNS). This suggests antipsychotic drugs may impact white matter pathology in schizophrenia.
Area of Science:
- Neuroscience
- Pharmacology
- Genetics
Background:
- Schizophrenia presents with positive, negative, and cognitive symptoms.
- Antipsychotics like haloperidol treat positive symptoms by affecting dopamine signaling.
- Haloperidol may worsen negative/cognitive symptoms, linked to white matter pathology and oligodendrocyte dysfunction.
Purpose of the Study:
- To investigate the impact of chronic haloperidol treatment on genes vital for myelin and oligodendrocyte function.
- To determine if haloperidol affects oligodendrocyte gene expression in the central nervous system (CNS).
Main Methods:
- Male mice received daily haloperidol (2 mg/kg) for 30 days.
- In situ hybridization and quantitative densitometry were used to measure gene expression.
- Gene expression changes in white matter regions were analyzed.
Main Results:
- Haloperidol treatment significantly decreased the expression of eight key myelin/oligodendrocyte genes in mouse CNS white matter.
- Clozapine treatment did not affect the expression of a subset of these genes.
- Findings suggest haloperidol negatively impacts oligodendrocyte function.
Conclusions:
- Chronic haloperidol administration alters gene expression critical for myelin and oligodendrocyte function.
- These findings have implications for understanding schizophrenia pathophysiology and treatment strategies.
- Further research is needed to explore the clinical relevance of these drug-induced changes in white matter.
