Abstract
Gene expression of somatostatin (SST) and preprotachykinin A (PPTA) in lumbar DRG neurons of postnatal developing rats was examined by in situ hybridization. SST mRNA signals were not seen in DRG neurons until postnatal day 1 to 7, and were detected in about 10% of DRG neurons of 2- and 8-week-old rats. The positive neurons expressed c-ret mRNA in 8-week-old rats. On the other hand, PPTA mRNA signals were constantly seen in about 30% of DRG neurons. This study demonstrates the differential expression patterns of SST and PPTA mRNAs in DRG neurons of developing rats.
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