Pflügers Archiv - European Journal of Physiology

, Volume 460, Issue 2, pp 249–263

Sodium channelopathies and pain

  • Angelika Lampert
  • Andrias O. O’Reilly
  • Peter Reeh
  • Andreas Leffler
Ion Channels, Receptors and Transporters

DOI: 10.1007/s00424-009-0779-3

Cite this article as:
Lampert, A., O’Reilly, A.O., Reeh, P. et al. Pflugers Arch - Eur J Physiol (2010) 460: 249. doi:10.1007/s00424-009-0779-3

Abstract

Chronic pain often represents a severe, debilitating condition. Up to 10% of the worldwide population are affected, and many patients are poorly responsive to current treatment strategies. Nociceptors detect noxious conditions to produce the sensation of pain, and this signal is conveyed to the CNS by means of action potentials. The fast upstroke of action potentials is mediated by voltage-gated sodium channels, of which nine pore-forming α-subunits (Nav1.1–1.9) have been identified. Heterogeneous functional properties and distinct expression patterns denote specialized functions of each subunit. The Nav1.7 and Nav1.8 subunits have emerged as key molecules involved in peripheral pain processing and in the development of an increased pain sensitivity associated with inflammation and tissue injury. Several mutations in the SCN9A gene encoding for Nav1.7 have been identified as important cellular substrates for different heritable pain syndromes. This review aims to cover recent progress on our understanding of how biophysical properties of mutant Nav1.7 translate into an aberrant electrogenesis of nociceptors. We also recapitulate the role of Nav1.8 for peripheral pain processing and of additional sodium channelopathies which have been linked to disorders with pain as a significant component.

Keywords

Sodium channelMutationNav1.7PainPatch-clampThree dimensional computer modeling

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Angelika Lampert
    • 1
  • Andrias O. O’Reilly
    • 2
  • Peter Reeh
    • 1
  • Andreas Leffler
    • 3
  1. 1.Department of Physiology and PathophysiologyFriedrich-Alexander University Erlangen-NurembergErlangenGermany
  2. 2.Department of Crystallography, Birkbeck CollegeUniversity of LondonLondonUK
  3. 3.Department of AnesthesiologyFriedrich-Alexander-University Erlangen-NurembergErlangenGermany