Evidence for Long-Term Neurotoxicity Associated With Methamphetamine Abuse: A 1H MRS Study

Neurology. 2000 Mar 28;54(6):1344-9. doi: 10.1212/wnl.54.6.1344.

Abstract

Objective: To determine whether proton MRS (1H MRS) can detect long-term metabolite abnormalities in abstinent methamphetamine users.

Background: Methamphetamine is toxic to dopaminergic and serotonergic neurons in rodents; however, little data are available on the toxic effects of methamphetamine on the human brain.

Methods: 1H MRS was performed in 26 abstinent methamphetamine abusers with a history of methamphetamine dependence (median total cumulative lifetime exposure, 3,640 g; median recency of last methamphetamine use, 4.25 months) and 24 healthy subjects without a history of drug abuse. Cerebral metabolite concentrations on 1H MRS were measured in the frontal cortex, frontal white matter, and basal ganglia.

Results: The concentration of N-acetylaspartate ([NA]), a neuronal marker, was reduced significantly (-5 to -6%) in the basal ganglia and frontal white matter of methamphetamine users compared with control subjects. The frontal white matter [NA] correlated inversely with the logarithm of the lifetime methamphetamine use. The methamphetamine users also showed significantly reduced total creatine in the basal ganglia (-8%), and increased choline-containing compounds ([CHO], +13%) and myo-inositol ([MI], +11%) in the frontal grey matter.

Conclusions: The reduced [NA] on 1H MRS provides evidence for long-term neuronal damage in abstinent methamphetamine users.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Brain Diseases / metabolism*
  • Female
  • Humans
  • Magnetic Resonance Imaging
  • Magnetic Resonance Spectroscopy
  • Male
  • Methamphetamine / adverse effects*
  • Protons
  • Substance-Related Disorders / metabolism*
  • Substance-Related Disorders / pathology
  • Time Factors

Substances

  • Protons
  • Methamphetamine