A role for nucleus accumbens glutamate transmission in the relapse to cocaine-seeking behavior

J. L. Cornish*, P. Duffy, P. W. Kalivas

*Corresponding author for this work

Research output: Contribution to journalArticle

191 Citations (Scopus)

Abstract

This study investigated the effect of ionotropic glutamate receptor agonist or antagonist administration into the nucleus accumbens on the maintenance of cocaine self-administration and the reinstatement of cocaine-seeking behavior. The stimulation of α-amino-3-hydroxy-5-methylisoxazole-4-proprionic acid or N-methyl-D-aspartate glutamate receptors in the nucleus accumbens with either α-amino-3-hydroxy-5-methylisoxazole-4-proprionic acid or 1-aminocyclobutane-cis-1,3-dicarboxylic acid, respectively, decreased the number of cocaine-reinforced responses, suggesting an enhancement in the rewarding properties of cocaine. In contrast, blockade of α-amino-3-hydroxy-5-methylisoxazole-4-proprionic acid receptors with N-methyl-D-aspartate, or N-methyl-D-aspartate receptors with dizocilpine maleate or 2-amino-5-phosphonovaleric acid had no selective effect on the maintenance of cocaine self-administration. Following one week of extinction from the reinforcing cue of the drug-paired lever, both α-amino-3-hydroxy-5-methylisoxazole-4-proprionic acid and 1-aminocyclobutane-cis-1,3-dicarboxylic acid treatment in the nucleus accumbens reinstated cocaine-seeking behavior. However, α-amino-3-hydroxy-5-methylisoxazole-4-proprionic acid treatment increased responding only on the drug-paired lever, while 1-aminocyclobutane-cis-1,3-dicarboxylic acid increased responding on both the drug-paired and non-drug-paired levers.These results suggest that stimulation of glutamate receptors in the nucleus accumbens augments the reinforcing effect of cocaine, yet glutamate transmission is not required to maintain cocaine self-administration. In addition, increased glutamate transmission in the nucleus accumbens may be involved in facilitating the relapse to cocaine-seeking behavior. Copyright (C) 1999 IBRO.

Original languageEnglish
Pages (from-to)1359-1367
Number of pages9
JournalNeuroscience
Volume93
Issue number4
DOIs
Publication statusPublished - Aug 1999
Externally publishedYes

Keywords

  • Cocaine
  • Drug relapse
  • Glutamate
  • Nucleus accumbens
  • Reinstatement
  • Self-administration

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