Abstract
Previous study in our laboratory demonstrates that microinjection of galanin into the arcuate nucleus of hypothalamus produced antinociceptive effects in rats. In the present study we investigated the involvement of protein kinase C (PKC) and PKC signaling pathways in the galanin-induced antinociception in the brain of rats. Intracerebroventricular injection of galanin produced antinociceptive effects in rats tested by hot-plate and Randall Selitto test. Interestingly, the galanin-induced antinociception was significantly attenuated by intracerebroventricular injection of the PKC inhibitor chelerythrine, indicating an involvement of PKC in the galanin-induced antinociception in rats. Taken together, the results demonstrate that galanin induces antinociceptive effects in the rat brain, and PKC is involved in the galanin-induced antinociception in the brain of rats.
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