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Yamada, J. et al.

p-Chloroamphetamine, a serotonin-releasing drug, elicited in rats a hyperglycemia mediated by the 5-HT1A and 5-HT2B/2C receptors.

The effects of a serotonin (5-HT) releasing drug, p-chloroamphetamine, on plasma glucose levels were investigated in rats. p-Chloroamphetamine elicited a significant hyperglycemia. The hyperglycemic effects of p-chloroamphetamine were completely prevented by the 5-HT synthesis inhibitor, p-chlorophenylalanine. Prior adrenodemedullation abolished the hyperglycemia elicited by p-chloroamphetamine. p-Chloroamphetamine-induced hyperglycemia was prevented by methysergide, which blocks the 5-HT1 and 5-HT2 receptor, the 5-HT1A/1B/2C receptor antagonist, (-)-propranolol, the selective 5-HT1A receptor antagonist, 4-(2'-methoxyphenyl-1-[2'-n-2"pyridinyl)-p-iodobenzamido]-ethyl-pi perazine (p-MPPI), the 5-HT2A/2B/2C receptor antagonists, ritanserin and 4-isopropyl-7-methyl-9-(2-hydroxy-1-methyl-propoxycarbonyl)-4,6A,7 ,8,9,10,10A-octahydro-indolo[4,3-FG]quinolone maleate(LY 53857). However, the 5-HT3 and 5-HT4 receptor antagonist, tropisetron, the 5-HT4 receptor antagonist, 2-methoxy-4-amino-5-chloro-benzoic acid 2-(diethylamino) ethyl ester (SDZ 205-557), and the 5-HT2A receptor antagonist, ketanserin, did not affect the p-chloroamphetamine-induced hyperglycemia. These results suggest that p-chloroamphetamine-induced hyperglycemia is elicited by an enhanced 5-HT release and facilitated adrenaline release. Moreover, our results indicate that p-chloroamphetamine-induced hyperglycemia is mediated by 5-HT1A and 5-HT2B/2C receptors.[1]

References

p-Chloroamphetamine, a serotonin-releasing drug, elicited in rats a hyperglycemia mediated by the 5-HT1A and 5-HT2B/2C receptors. Yamada, J., Sugimoto, Y., Yoshikawa, T. Eur. J. Pharmacol. (1998) [Pubmed]

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