These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Differential expression of tetrodotoxin-resistant sodium channels Nav1.8 and Nav1.9 in normal and inflamed rats.
    Author: Coggeshall RE, Tate S, Carlton SM.
    Journal: Neurosci Lett; 2004 Jan 23; 355(1-2):45-8. PubMed ID: 14729231.
    Abstract:
    In an attempt to understand mechanisms underlying peripheral sensitization of primary afferent fibers, we investigated the presence of the tetrodotoxin-resistant Na+ channel subunits Nav1.8 (SNS) and Nav1.9 (SNS2) on axons in digital nerves of normal and inflamed rat hindpaws. In normal animals, 14.3% of the unmyelinated and 10.7% of the myelinated axons labeled for the Nav1.8 subunit. These percentages significantly increased in 48 h inflamed animals to 22.0% (1.5-fold increase) and 57.5% (6-fold increase) for unmyelinated and myelinated axons, respectively. In normal animals, Nav1.9 labeled 9.9% of the unmyelinated and 2.1% of the myelinated axons and following inflammation, the proportion of Nav1.9-labeled unmyelinated axons significantly decreased to 3.0% with no change in the proportion of labeled myelinated axons. These data indicate that Nav1.8 and Nav1.9 subunits are transported to the periphery in normal animals and are differentially regulated during inflammation. The massive increase in Nav1.8 expression in myelinated axons suggests that these may contribute to peripheral sensitization and inflammatory hyperalgesia.
    [Abstract] [Full Text] [Related] [New Search]