Cited by 89Cannabis and Cannabinoid ResearchPain Mechanisms and TreatmentsPain Management and Treatment

Involvement of central cannabinoid CB2 receptor in reducing mechanical allodynia in a mouse model of neuropathic pain

Yamamoto, Wataru, Mikami, Tadayoshi, Iwamura, Hiroyuki·2008·European Journal of Pharmacology

Abstract

We sought to examine the involvement of central cannabinoid CB2 receptor activation in modulating mechanical allodynia in a mouse model of neuropathic pain. JWH133 was demonstrated to be a selective cannabinoid CB2 receptor agonist in mice, reducing forskolin-stimulated cAMP production in CHO cells expressing mouse cannabinoid CB2 and cannabinoid CB1 receptors with EC50 values of 63 nM and 2500 nM, respectively. Intrathecal administration of JWH133 (50 and 100 nmol/mouse) significantly reversed partial sciatic nerve ligation-induced mechanical allodynia in mice at 0.5 h after administration. In contrast, systemic (intraperitoneal) or local (injected to the dorsal surface of the hindpaw) administration of JWH133 (100 nmol/mouse) was ineffective. Furthermore, the analgesic effects of intrathecal JWH133 (100 nmol/mouse) were absent in cannabinoid CB2 receptor knockout mice. These results suggest that the activation of central, but not peripheral, cannabinoid CB2 receptors play an important role in reducing mechanical allodynia in a mouse model of neuropathic pain.

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Crossref · 10.1016/j.ejphar.2008.01.010

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Authors
Yamamoto, W., Mikami, T., & Iwamura, H.
Affiliations
Pfizer (Japan) (JP)
Corresponding author
Iwamura, Hiroyuki
Venue
European Journal of Pharmacology
Publisher
Elsevier BV
Published
2008-03
Volume
583
Issue
1
Pages
56-61
ISSN
0014-2999 (ISSN-L)
OpenAlex
W2094735736
Cited by
89
References
32
Citations by year
2026: 1 · 2025: 5 · 2024: 2 · 2023: 1 · 2022: 2 · 2021: 4 · 2020: 6 · 2019: 2 · 2018: 5 · 2017: 3 · 2016: 4 · 2015: 5 · 2014: 4 · 2013: 10 · 2012: 7
FWCI
6.54
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
Keywords
CB2 receptor, mechanical allodynia, neuropathic pain, JWH-133, intrathecal administration, sciatic nerve ligation, cAMP signaling, analgesia
MeSH terms
Cyclic AMP, Animals, Cannabinoids, Cricetulus, Female, Genetic Vectors, Cricetinae, Indicators and Reagents, Injections, Intraperitoneal, Injections, Spinal, Ligation, Male, Mice, Inbred C57BL, Pain, Peripheral Nervous System Diseases, Physical Stimulation, Sciatic Nerve, Transfection, CHO Cells, Mice, Knockout, Sciatic Neuropathy, Receptor, Cannabinoid, CB2, Mice

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