Repeated exposure to methamphetamine causes long-lasting presynaptic corticostriatal depression that is renormalized with drug readministration

Neuron. 2008 Apr 10;58(1):89-103. doi: 10.1016/j.neuron.2008.01.033.

Abstract

Addiction-associated behaviors such as drug craving and relapse are hypothesized to result from synaptic changes that persist long after withdrawal and are renormalized by drug reinstatement, although such chronic synaptic effects have not been identified. We report that exposure to the dopamine releaser methamphetamine for 10 days elicits a long-lasting (>4 month) depression at corticostriatal terminals that is reversed by methamphetamine readministration. Both methamphetamine-induced chronic presynaptic depression and the drug's selective renormalization in drug-experienced animals are independent of corresponding long-term changes in synaptic dopamine release but are due to alterations in D1 dopamine and cholinergic receptor systems. These mechanisms might provide a synaptic basis that underlies addiction and habit learning and their long-term maintenance.

Publication types

  • Comparative Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cerebral Cortex / drug effects*
  • Cerebral Cortex / physiology
  • Corpus Striatum / drug effects*
  • Corpus Striatum / physiology
  • Drug Administration Schedule
  • Long-Term Synaptic Depression / drug effects*
  • Long-Term Synaptic Depression / physiology
  • Methamphetamine / administration & dosage*
  • Mice
  • Mice, Inbred C57BL
  • Neural Pathways / drug effects
  • Neural Pathways / physiology
  • Neuronal Plasticity / drug effects
  • Neuronal Plasticity / physiology
  • Presynaptic Terminals / drug effects*
  • Presynaptic Terminals / physiology
  • Synaptic Transmission / drug effects
  • Synaptic Transmission / physiology

Substances

  • Methamphetamine