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Related Experiment Videos

Methamphetamine selectively alters brain glutathione.

C Harold1, T Wallace, R Friedman

  • 1Program in Basic and Clinical Neuroscience, Department of Psychiatry, Case Western Reserve University, 44106, Cleveland, OH, USA.

European Journal of Pharmacology
|July 29, 2000
PubMed
Summary

Methamphetamine neurotoxicity may involve oxidative stress. This study found methamphetamine increased glutathione levels (GSH and GSSG) in rat brains 2 hours post-administration, suggesting a role in oxidative stress.

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Area of Science:

  • Neuroscience
  • Toxicology
  • Biochemistry

Background:

  • Methamphetamine-induced neurotoxicity is a growing concern.
  • Oxidative stress is a proposed mechanism underlying this neurotoxicity.
  • The role of specific antioxidants, like glutathione, vitamin E, and ascorbate, requires further elucidation.

Purpose of the Study:

  • To investigate the impact of methamphetamine on key components of the oxidative stress pathway in the rat striatum.
  • To determine the time course of changes in glutathione (reduced and oxidized forms), vitamin E, and ascorbate following methamphetamine administration.

Main Methods:

  • Neurotoxic doses of methamphetamine were administered to rats.
  • Levels of reduced glutathione (GSH), oxidized glutathione (GSSG), vitamin E, and ascorbate were measured in striatal tissue.

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  • Measurements were taken at 2 and 24 hours post-methamphetamine administration.

    • Main Results:

    • Methamphetamine significantly increased both GSH and GSSG levels by 32.5% and 43.7%, respectively, at the 2-hour time point.
    • No significant changes in glutathione levels were observed at 24 hours.
    • Levels of vitamin E and ascorbate remained unchanged at both measured time points.

    Conclusions:

    • Methamphetamine selectively impacts the glutathione system in the rat striatum.
    • These findings support a role for methamphetamine in inducing oxidative stress.
    • The observed changes suggest a rapid, transient effect on the glutathione redox balance.