Metabotropic glutamate 5 modulators: potential agents for treating cocaine addiction

Christina J. Perry*, Andrew J. Lawrence

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

There is ongoing interest in the role of the metabotropic glutamate 5 (mGlu5) receptor in cocaine-seeking behavior. Here we review the evidence from preclinical models that mGlu5 modulators might have a place in the treatment of cocaine addiction. mGlu5-negative allosteric modulators attenuate the incentive value of cocaine, and hence typically decrease cocaine self-administration and relapse to cocaine-seeking after extinction. However, it also seems that mGlu5 receptor distribution alters following extended cocaine exposure followed by withdrawal. Furthermore, in key circuits there is a switch from mGlu5-dependent to mGlu1-dependent transmission with increasing cocaine experience. Therefore, an mGlu5-negative allosteric modulator may be less effective in treating long-term cocaine addiction. On the other hand, mGlu5-positive allosteric modulators have cognitive enhancing effects, and mGlu5 is necessary for the inhibitory learning (extinction) that forms the basis of many behavioral treatments for addiction. Therefore, we propose that mGlu5-positive allosteric modulators, in conjunction with behavioral therapy, may prove a worthwhile strategy for treating cocaine addiction.

Original languageEnglish
Title of host publicationNeuropathology of drug addictions and substance misuse
Subtitle of host publicationstimulants, club and dissociative drugs, hallucinogens, steroids, inhalants and international aspects
EditorsVictor R. Preedy
Place of PublicationLondon
PublisherAcademic Press
Chapter8
Pages86-96
Number of pages11
Volume2
ISBN (Electronic)9780128003756
ISBN (Print)9780128002124
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • addiction
  • cocaine
  • extinction
  • glutamate
  • metabotropic glutamate 5 receptor
  • reinforcement
  • treatment

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