The beta3 subunit of the Na+,K+-ATPase mediates variable nociceptive sensitivity in the formalin test.

Journal Article

It is widely appreciated that there is significant inter-individual variability in pain sensitivity, yet only a handful of contributing genetic variants have been identified. Computational genetic mapping and quantitative trait locus analysis suggested that variation within the gene coding for the beta3 subunit of the Na+,K+-ATPase pump (Atp1b3) contributes to inter-strain differences in the early phase formalin pain behavior. Significant strain differences in Atp1b3 gene expression, beta3 protein expression, and biophysical properties of the Na+,K+ pump in dorsal root ganglia neurons from resistant (A/J) and sensitive (C57BL/6J) mouse strains supported the genetic prediction. Furthermore, in vivo siRNA knockdown of the beta3 subunit produced strain-specific changes in the early phase pain response, completely rescuing the strain difference. These findings indicate that the beta3 subunit of the Na+,K+-ATPase is a novel determinant of nociceptive sensitivity and further supports the notion that pain variability genes can have very selective effects on individual pain modalities.

Full Text

Duke Authors

Cited Authors

  • LaCroix-Fralish, ML; Mo, G; Smith, SB; Sotocinal, SG; Ritchie, J; Austin, J-S; Melmed, K; Schorscher-Petcu, A; Laferriere, AC; Lee, TH; Romanovsky, D; Liao, G; Behlke, MA; Clark, DJ; Peltz, G; Séguéla, P; Dobretsov, M; Mogil, JS

Published Date

  • August 2009

Published In

Volume / Issue

  • 144 / 3

Start / End Page

  • 294 - 302

PubMed ID

  • 19464798

Electronic International Standard Serial Number (EISSN)

  • 1872-6623

International Standard Serial Number (ISSN)

  • 0304-3959

Digital Object Identifier (DOI)

  • 10.1016/j.pain.2009.04.028

Language

  • eng