Abstract
Noxious peripheral stimulation induces the expression of various proto-oncogenes in rat spinal neurons. However, proto-oncogene expression seems to differ depending on the mode of the stimulus. Here, we report that noxious cutaneous ultraviolet (UV) irradiation results in a nearly 8-fold increase in junD mRNA levels in the rat lumbar spinal cord. RNA slot-blotting and hybridization techniques revealed a transcriptional activation of the junD proto-oncogene after 6 h, but not 1 h following UV exposure. These results suggest that low-frequency ongoing afferent impulse discharge is reflected by an accumulation in junD transcripts.
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