Adaptive regulation of central serotonin receptors linked to phosphoinositide hydrolysis.


Central 5-HT2 and 5-HT1C receptors appear to be relatively resistant to up-regulation. 5-HT2 receptors are not upregulated after denervation of 5-HT neurons and chronic administration of antagonists elicits a paradoxical downregulation of both receptors. This article explores the possible explanations for these anomalous findings. 


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