Cited by 310Cannabis and Cannabinoid ResearchPain Mechanisms and TreatmentsPain Management and Treatment

The analgesic effects of R(+)-WIN 55,212-2 mesylate, a high affinity cannabinoid agonist, in a rat model of neuropathic pain

Herzberg, U, Eliav, E, Bennett, G.J, Kopin, Irwin J·1997·Neuroscience Letters

Abstract

The effects of a high affinity cannabinoid receptor agonist were evaluated in rats subjected to chronic constriction injury of the sciatic nerve (CCI) or a sham operation. Intraperitoneal (i.p.) injections of the active, but not the inactive enantiomer, alleviated the pain behavior exhibited by CCI animals in a dose dependent manner. Moreover, at doses ranging from 0.43 to 4.3 mg/kg effects on sensitivity to a heat stimulus were observed neither in the paw contralateral to the sciatic ligation, nor in animals subjected to sham surgery. Animals subjected to CCI and treated with 4.3 mg/kg exhibited hypoalgesia in the paw ipsilateral to the ligated sciatic, i.e. heat hypoalgesia was completely reversed. The hypoalgesia is presumed to be the results of unmasking of a sensory deficit reflecting the known loss of C and A delta with CCI. Although side effects were present in some CCI animals subjected to the high dose (4.3 mg/kg), a moderate dose (2.14 mg/kg) completely alleviated the thermal and mechanical hyperalgesia, and mechanical allodynia without side effects. In addition to identifying a potential drug treatment for painful neuropathy, this study suggests that changes in cannabinoid receptors occurs in nerve injured animals.

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Crossref · 10.1016/s0304-3940(96)13308-5

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Authors
Herzberg, U., Eliav, E., Bennett, G. J., & Kopin, I. J.
Affiliations
National Institutes of Health (US)
Corresponding author
Herzberg, U
Venue
Neuroscience Letters
Publisher
Elsevier BV
Published
1997-01
Volume
221
Issue
2-3
Pages
157-160
ISSN
0304-3940 (ISSN-L)
OpenAlex
W1968446992
Cited by
307
References
15
Citations by year
2026: 2 · 2025: 6 · 2024: 6 · 2023: 3 · 2022: 6 · 2021: 2 · 2020: 7 · 2019: 9 · 2018: 4 · 2017: 8 · 2016: 3 · 2015: 7 · 2014: 2 · 2013: 14 · 2012: 12
FWCI
10.32
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroscience Letters (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
cannabinoid receptor agonists, neuropathic pain, chronic constriction injury, sciatic nerve, analgesia, mechanical allodynia, thermal hyperalgesia, mechanical hyperalgesia, enantiomer specificity
MeSH terms
Rimonabant, Animals, Cannabinoids, Hot Temperature, Hyperalgesia, Injections, Intraperitoneal, Male, Morpholines, Naphthalenes, Pain, Peripheral Nervous System Diseases, Piperidines, Pyrazoles, Receptors, Drug, Rats, Sprague-Dawley, Analgesics, Non-Narcotic, Receptors, Cannabinoid, Benzoxazines, Rats

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