A role for mGluR5 receptors in intravenous methamphetamine self-administration

Megan P.H. Osborne, M. Foster Olive

Research output: Chapter in Book/Report/Conference proceedingConference contribution

26 Scopus citations

Abstract

Selective antagonists of the mGluR5 receptor attenuate rewarding and reinforcing effects of various drugs of abuse, including alcohol, nicotine, and cocaine. However, the ability of mGluR5 antagonists to alter the reinforcing effects of methamphetamine has not yet been explored. In this study, male Sprague-Dawley rats were trained to perform an operant lever-pressing task in order to obtain intravenous infusions of methamphetamine (0.2 mg/kg/infusion) or presentation of food pellets on a fixed ratio (FR1) schedule of reinforcement. After stabilization of methamphetamine or food self-administration, the selective mGluR5 antagonist 3-[(2-methyl-1,3-thiazol-4-yl) ethynyl]pyridine (MTEP; 0.3, 1.0, or 3.0 mg/kg i.p.) or vehicle were administered to the animals in a randomized counterbalanced cross-over design. MTEP at doses of 1.0 and 3.0 mg/kg significantly reduced methamphetamine self-administration by 26 and 36%, respectively, but did not alter food reinforcement at any dose tested. These data suggest that mGluR5 receptors are involved in the reinforcing effects of methamphetamine, and that antagonists of this receptor may serve as novel pharmacologic agents for the treatment of addiction to methamphetamine.

Original languageEnglish (US)
Title of host publicationDrug Addiction
Subtitle of host publicationResearch Frontiers and Treatment Advances
PublisherBlackwell Publishing Inc.
Pages206-211
Number of pages6
ISBN (Print)9781573317184
DOIs
StatePublished - Oct 2008
Externally publishedYes

Publication series

NameAnnals of the New York Academy of Sciences
Volume1139
ISSN (Print)0077-8923
ISSN (Electronic)1749-6632

Keywords

  • Antagonist
  • Food
  • Intravenous self-administration
  • Methamphetamine
  • Rat
  • Reinforcement
  • mGluR5 receptor

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • History and Philosophy of Science

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