Titre
The pattern of expression of the voltage-gated sodium channels Na(v)1.8 and Na(v)1.9 does not change in uninjured primary sensory neurons in experimental neuropathic pain models
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Decosterd, I.
Auteure/Auteur
Ji, R. R.
Auteure/Auteur
Abdi, S.
Auteure/Auteur
Tate, S.
Auteure/Auteur
Woolf, C. J.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
0304-3959
Statut éditorial
Publié
Date de publication
2002-04
Volume
96
Numéro
3
Première page
269
Dernière page/numéro d’article
77
Notes
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S. --- Old month value: Apr
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S. --- Old month value: Apr
Résumé
A spared nerve injury of the sciatic nerve (SNI) or a segmental lesion of the L5 and L6 spinal nerves (SNL) lead to behavioral signs of neuropathic pain in the territory innervated by adjacent uninjured nerve fibers, while a chronic constriction injury (CCI) results in pain sensitivity in the affected area. While alterations in voltage-gated sodium channels (VGSCs) have been shown to contribute to the generation of ectopic activity in the injured neurons, little is known about changes in VGSCs in the neighboring intact dorsal root ganglion (DRG) neurons, even though these cells begin to fire spontaneously. We have now investigated changes in the expression of the TTX-resistant VGSCs, Nav1.8 (SNS/PN3) and Nav1.9 (SNS2/NaN) by immunohistochemistry in rat models of neuropathic pain both with an intermingling of intact and degenerated axons in the nerve stump (SNL and CCI) and with a co-mingling in the same DRG of neurons with injured and uninjured axons (sciatic axotomy and SNI). The expression of Nav1.8 and Nav1.9 protein was abolished in all injured DRG neurons, in all models. In intact DRGs and in neighboring non-injured neurons, the expression and the distribution among the A- and C-fiber neuronal populations of Nav1.8 and Nav1.9 was, however, unchanged. While it is unlikely, therefore, that a change in the expression of TTX-resistant VGSCs in non-injured neurons contributes to neuropathic pain, it is essential that molecular alterations in both injured and non-injured neurons in neuropathic pain models are investigated.
Sujets
PID Serval
serval:BIB_438B686B8F7A
PMID
Date de création
2008-01-28T09:45:30.081Z
Date de création dans IRIS
2025-05-20T13:37:57Z