Postnatal change of GluR5 kainate receptor expression in the substantia gelatinosa neuron of the trigeminal subnucleus caudalis in mice

作者：Park Seon Ah; Yin Hua; Bhattarai Janardhan P; Park Soo Joung; Lee Jeong Chae; Kim Chul Jin; Han Seong Kyu^*

来源：Brain Research, 2010, 1346: 52-61.

DOI：10.1016/j.brainres.2010.05.065

• Kainate
• Trigeminal subnucleus caudalis
• Substantia gelatinosa
• Patch clamp
• RT-PCR
• Western blot
• GluR5

The substantia gelatinosa (SG) of the trigeminal subnucleus caudalis (Vc) has been implicated in the processing of nociceptive information from the orofacial region Kainate receptors (KARs) play an important role in sensory transmission Five different KAR subunits have been cloned and the expression of the KAR subunits showed developmental changes In this study, RT-PCR, western blotting, immunohistochemistry and a patch clamp technique were used examine the functional expression of the GluR5 subunit in the SG of the Vc in juvenile, peripubertal and/or adult mice The levels of mRNA and protein expression of the GluR5 subunit in the SG of the Vc were higher in the juvenile mice than in the peripubertal or adult mice In addition, the KA and ATPA, a GluR5 KAR agonist, induced membrane depolarization on the SG neurons in both juvenile and adult mice in a concentration-dependent manner However, the juvenile SG neurons showed a stronger response to KA and ATPA than those of adults The membrane depolarization by KA was suppressed slightly in the presence of the AMPA receptor antagonist, GYKI 52466 These results show that the GluR5 KAR subunits are expressed functionally on the SG neurons of the Vc in mice, and the expression levels of the Glu

• 出版日期2010-7-30