Comparative study of voltage-gated sodium channel α-subunits in non-overlapping four neuronal populations in the rat dorsal root ganglion

► Nav1.1 and Nav1.6 are A-fiber specific channels. ► Nav1.8 are common channels in both C- and A-fiber nociceptors. ► Nav1.9 is rather selective for C-fiber nociceptors. ► Nav1.7 is the most universal channel. ► A functionally unknown N52+/TrkA− subpopulation selectively lack Nav1.7.