D the antinociceptive effects of viral vectors, asBased on the behavioral results, we examined the expression of the endomorphins and serine histogranin in the dorsal horn of the spinal cord seven weeks after viral vector injection. Sections were labeled for endomorphins or SHG immunoreactivity. Immunoreactive positive cells for SHG (A) and endomorphins (B) were seen in the dorsal horn at the 7th