POTENCIES OF ANTAGONISTS INDICATE THAT 5-HT1C RECEPTORS MEDIATE 1-3(CHLOROPHENYL)PIPERAZINE-INDUCED HYPOPHAGIA
POTENCIES OF ANTAGONISTS INDICATE THAT 5-HT1C RECEPTORS MEDIATE 1-3(CHLOROPHENYL)PIPERAZINE-INDUCED HYPOPHAGIA
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DOI：
10.1111/j.1476-5381.1991.tb12369.x
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发表时间：
1991-08-01
影响因子：
7.3
通讯作者：
CURZON, G
中科院分区：
文献类型：
--
作者：
KENNETT, GA;CURZON, G
1 1-3(Chlorophenyl)piperazine (mCPP) (5 mg kg-1, i.p.) inhibited 2h food intake in rats previously deprived of food for one day. Ten 5-hydroxytryptamine (5-HT) antagonists given s.c. opposed this hypophagic response. Calculated ID50 values correlated significantly with reported affinities (r = 0.81, n = 10, P < 0.01) for 5-HT1C but not for 5-HT2, 5-HT1A, 5-HT1B or 5-HT1D receptors.2 ID50 values of the ten antagonists against 5-hydroxytryptophan (5-HTP) + carbidopa-induced head shakes (a 5-HT2-mediated response) correlated significantly (r = 0.81, n = 10, P < 0.01) with their affinities for 5-HT2 but not for 5-HT1A, 5-HT1B, 5-HT1C or 5-HT1D receptors.3 ID50 values for inhibition of hypophagia and head shakes did not correlate significantly with each other.4 Ratios of ID50 values against hypophagia and 5-HT2-mediated head shakes gave indices of relative in vivo potencies independent of differences in drug metabolism and disposition. These ratios correlated highly significantly (r = 0.91, n = 10, P < 0.001) with the ratios of the affinities of the drugs for 5-HT1C (but not for 5-HT1A, 5-HT1B or 5-HT1D receptors) and with their affinities for 5-HT2 receptors. These results strongly support the hypothesis that mediation of mCPP-induced hypophagia is by stimulation of 5-HT1C receptors and the mediation of 5-HTP-induced head twitches by 5-HT2 receptors.
