Cited by 401Cannabis and Cannabinoid ResearchNeurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology Research

Brain cannabinoid CB2 receptors modulate cocaine's actions in mice

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Xi, Zheng-Xiong, Peng, Xiao-Qing, Li, Xia, Song, Rui, Zhang, Hai-Ying, Liu, Qing-Rong, Yang, Hong-Ju, Bi, Guo-Hua +2 more·2011·Nature Neuroscience

Abstract

The presence and function of cannabinoid CB(2) receptors in the brain have been the subjects of much debate. We found that systemic, intranasal or intra-accumbens local administration of JWH133, a selective CB(2) receptor agonist, dose-dependently inhibited intravenous cocaine self-administration, cocaine-enhanced locomotion, and cocaine-enhanced accumbens extracellular dopamine in wild-type and CB(1) receptor knockout (CB(1)(-/-), also known as Cnr1(-/-)) mice, but not in CB(2)(-/-) (Cnr2(-/-)) mice. This inhibition was mimicked by GW405833, another CB(2) receptor agonist with a different chemical structure, and was blocked by AM630, a selective CB(2) receptor antagonist. Intra-accumbens administration of JWH133 alone dose-dependently decreased, whereas intra-accumbens administration of AM630 elevated, extracellular dopamine and locomotion in wild-type and CB(1)(-/-) mice, but not in CB(2)(-/-) mice. Intra-accumbens administration of AM630 also blocked the reduction in cocaine self-administration and extracellular dopamine produced by systemic administration of JWH133. These findings suggest that brain CB(2) receptors modulate cocaine's rewarding and locomotor-stimulating effects, likely by a dopamine-dependent mechanism.

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Authors
Xi, Z.-X., Peng, X.-Q., Li, X., Song, R., Zhang, H.-Y., Liu, Q.-R., Yang, H.-J., Bi, G.-H., Li, J., & Gardner, E. L.
Affiliations
National Institute on Drug Abuse (US)
Corresponding author
Xi, Zheng-Xiong
Venue
Nature Neuroscience
Published
2011-07-24
Volume
14
Issue
9
Pages
1160-1166
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W1989353122
Cited by
397
References
50
Citations by year
2026: 9 · 2025: 13 · 2024: 14 · 2023: 16 · 2022: 30 · 2021: 34 · 2020: 23 · 2019: 27 · 2018: 25 · 2017: 31 · 2016: 30 · 2015: 27 · 2014: 37 · 2013: 35 · 2012: 37
FWCI
28.11
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (Z99 DA999999)
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
CB2 receptor, cocaine self-administration, nucleus accumbens, JWH-133, AM630, dopamine, drug reward, CB2 receptor agonist
MeSH terms
Administration, Intranasal, Analysis of Variance, Animals, Brain, Cannabinoids, Cocaine, Conditioning, Operant, Indoles, Male, Mice, Inbred C57BL, Motor Activity, Self Administration, Microdialysis, Mice, Knockout, Dopamine Uptake Inhibitors, Receptor, Cannabinoid, CB1, Receptor, Cannabinoid, CB2, Rotarod Performance Test, Mice

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