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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Serotonin receptor sensitivity after acute and chronic treatment with mianserin.

The chronic administration of mianserin for 14 days leads to a marked decrease in the maximal number of serotonin2 (5-HT2) binding sites in brains of rats and mice with no change in the KD values. The decrease in [3H]spiroperidol binding to the 5-HT2 site in rats was most pronounced in the frontal cortex with only minor changes in hippocampus and pons-medulla. The 5-HT1 site was largely unaffected. The decrease in the Bmax for 5-HT2 site also occurred after a single dose of mianserin, although mianserin was more potent when given chronically. Maximal inhibition of binding occurred with a chronic dose of 0.5 mg/kg. The greatest decrease was found 48 hr after single or repeated doses with a gradual return to normal levels within 10 days. The administration of mianserin also leads to a decrease in 5-methoxy-N,N-dimethyltryptamine-induced head twitches in mice assayed 48 and 96 hr after a single or repeated doses, which is presumably correlated with the decrease in the 5-HT2 binding site assayed in vitro.[1]


  1. Serotonin receptor sensitivity after acute and chronic treatment with mianserin. Blackshear, M.A., Sanders-Bush, E. J. Pharmacol. Exp. Ther. (1982) [Pubmed]
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