Cited by 63Pain Mechanisms and TreatmentsPain Management and TreatmentIon Channels and Receptors

Characterization of chronic constriction of the saphenous nerve, a model of neuropathic pain in mice showing rapid molecular and electrophysiological changes

Walczak, Jean‐Sébastien, Pichette, Vincent, Leblond, François, Desbiens, Karine, Beaulieu, Pierre·2006·Journal of Neuroscience Research

Abstract

Neuropathic pain is one of the most inextricable problems encountered in clinics, because few facts are known about its etiology. Nerve injury often leads to allodynia and hyperalgesia, which are symptoms of neuropathic pain. The aim of this study was to understand some molecular and electrophysiological mechanisms of neuropathic pain after chronic constriction of the saphenous nerve (CCS) in mice. After surgery, CCS mice displayed significant allodynia and hyperalgesia, which were sensitive to acute systemic injection of morphine (4 mg/kg), gabapentin (50 mg/kg), amitriptyline (10 mg/kg), and the cannabinoid agonist WIN 55,212-2 (5 mg/kg). These behavioral changes were accompanied after surgery by an increase of c-Fos expression and by an overexpression of mu-opioid and cannabinoid CB1 and CB2 receptors in the spinal cord and the dorsal hind paw skin. In combination with the skin-nerve preparation, this model showed a decrease in functional receptive fields downstream to the injury and the apparition of A-fiber ectopic discharges. In conclusion, CCS injury induced behavioral, molecular, and electrophysiological rearrangements that might help us in better understanding the peripheral mechanisms of neuropathic pain. This model takes advantage of the possible use in the future of genetically modified mice and of an exclusively sensory nerve for a comprehensive study of peripheral mechanisms of neuropathic pain.

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Registry

Crossref · 10.1002/jnr.20821

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  • Systemic WIN55,212-2 suppressed all forms of neuropathic nociception present in the CCS model, including thermal hyperalgesia, cold allodynia, mechanical hyperalgesia, and mechanical allodynia.

    “Systemic WIN55,212-2 suppressed all forms of neuropathic nociception present in this model, including thermal hyperagesia, cold allodynia, mechanical hyperalgesia and mechanical allodynia.99”
  • Mu-opioid, CB1, and CB2 receptor protein was increased in the ipsilateral spinal cord and hindpaw skin at 7 days post-surgery in the CCS model.

    “Mu-opioid, CB1 and CB2 receptor protein was increased in the ipsilateral spinal cord and hindpaw skin at 7 days post-surgery.99”

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Authors
Walczak, J., Pichette, V., Leblond, F., Desbiens, K., & Beaulieu, P.
Affiliations
  • Université de Montréal (CA)
  • Hôpital Maisonneuve-Rosemont (CA)
  • Centre Hospitalier de l’Université de Montréal (CA)
Corresponding author
Beaulieu, Pierre
Venue
Journal of Neuroscience Research
Publisher
Wiley
Published
2006-03
Volume
83
Issue
7
Pages
1310-1322
ISSN
  • 0360-4012 (ISSN-L)
  • 1097-4547
OpenAlex
W1978946159
Cited by
62
References
58
Citations by year
2026: 1 · 2023: 1 · 2022: 1 · 2020: 2 · 2019: 4 · 2017: 1 · 2016: 1 · 2014: 4 · 2013: 7 · 2012: 2
FWCI
6.09
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuroscience Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
Keywords
neuropathic pain, allodynia, hyperalgesia, Fos expression, mu-opioid receptor, CB1 receptor, CB2 receptor, morphine sensitivity, gabapentin, amitriptyline, WIN 55,212-2, mouse model
MeSH terms
Action Potentials, Analgesics, Animals, Chronic Disease, Disease Models, Animal, Femoral Nerve, Hyperalgesia, Ligation, Male, Mice, Inbred C57BL, Nerve Fibers, Myelinated, Neuralgia, Pain Measurement, Peripheral Nervous System Diseases, Physical Stimulation, Sensory Receptor Cells, Proto-Oncogene Proteins c-fos, Receptors, Opioid, mu, Femoral Neuropathy, Posterior Horn Cells, Receptors, Cannabinoid, Mice

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