Abstract
The pain-threshold in the hot-plate test and serotonin (5-HT) receptor binding capacity in the cortex and pontine areas of rat brain were studied after intraperitoneal (ip) administration of acetyl salicylate of lysine equivalent to 400 mg/kg of acetylsalicylic acid (ASA). The antinociceptive activity of ASA was prevented by ip pre-treatment with Parachlorophenylalanine (PCPA) at the rate of 100 mg/kg/day for 4 days. PCPA pre-treatment increased the number of 5-HT receptors and abolished the ASA-induced reduction in 5-HT receptor binding capacity in the cortex but did not affect serum salicylate levels. These results provide support for the hypothesis that the antinociceptive action of ASA, at least in the hot-plate test, involves the central serotonergic system.
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Pini, L.A., Sandrini, M. & Vitale, G. Involvement of brain serotonergic system in the antinociceptive action of acetylsalicylic acid in the rat. Inflamm Res 44, 30–35 (1995). https://doi.org/10.1007/BF01630485
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DOI: https://doi.org/10.1007/BF01630485