Expression of three distinct families of calcium-activated chloride channel genes in the mouse dorsal root ganglion / 神经科学通报·英文版

ABSTRACT

Objective A calcium-activated chloride current (IClCa) has been observed in medium-sized sensory neurons of the dorsal root ganglion (DRG). Axotomy of the sciatic nerve induces a similar current in the majority of medium and large diameter neurons. Our aim is to identify the molecule(s) underlying this current. Methods Using conventional and quantitative RT-PCR, we examined the expression in DRG of members of three families of genes, which have been shown to have IClCa current inducing properties. Results We showed the detection of transcripts representing several members of these families, i.e. chloride channel calcium-activated (CLCA), Bestrophin and Tweety gene families in adult DRG, in the normal state and 3 d after sciatic nerve section, a model for peripheral nerve injury. Conclusion Our analysis revealed that that mBest1 and Tweety2 appear as the best candidates to play a role in the injury-induced IClCa in DRG neurons.