Dynamic downregulation of Nogo receptor expression in the rat forebrain by amphetamine

Ming Lei Guo, Bing Xue, Dao Zhong Jin, Li Min Mao, John Q. Wang

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Nogo receptors (NgRs) are a family of cell surface receptors that are broadly expressed in the mammalian brain. These receptors could serve as an inhibitory element in the regulation of activity-dependent axonal growth and spine and synaptic formation in the adult animal brain. Thus, through balancing the structural response to changing cellular and synaptic inputs, NgRs participate in constructing activitydependent morphological plasticity. Psychostimulants have been well documented to induce morphological plasticity critical for addictive properties of stimulants, although underlying molecular mechanisms are poorly understood. In this study, we initiated a study to investigate the response of NgRs to a stimulant. We tested the effect of acute administration of amphetamine on protein expression of two principal NgR subtypes (NgR1 and NgR2) in the rat striatum, medial prefrontal cortex (mPFC) and hippocampus. We found that a single injection of amphetamine induced a rapid and time-dependent decrease in NgR1 and NgR2 expression in the striatum and mPFC. A relatively delayed and time-dependent decrease in expression of the two receptors was seen in the hippocampus. The drug-induced decrease in NgR1 and NgR2 expression in the three forebrain regions was dose-dependent. A behaviorally active dose of the drug was required to trigger a significant reduction in NgR1 and NgR2 expression. These data indicate that NgRs are subject to the regulation by the stimulant. Amphetamine exposure exerts the inhibitory modulation of basal NgR1 and NgR2 expression in the key structures of reward circuits in vivo.

Original languageEnglish (US)
Pages (from-to)195-200
Number of pages6
JournalNeurochemistry International
Volume63
Issue number3
DOIs
StatePublished - 2013

Keywords

  • Addiction
  • Hippocampus
  • NgR
  • Nogo-66
  • Prefrontal cortex
  • Reticulon 4 receptor
  • Spine density
  • Stimulant
  • Striatum

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience
  • Cell Biology

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