Multiple serotonin receptors: Differential binding of [3H]5-hydroxytryptamine, [3H]lysergic acid diethylamide and [3H]spiroperidol

S. J. Peroutka, S. H. Snyder

Research output: Contribution to journalArticlepeer-review

1264 Scopus citations


[3H]5-hydroxytryptamine (5-HT), [3H]lysergic acid diethylamide (LSD) and [3H]spiroperidol bind to membranes from the rat frontal cerebral cortex in a manner indicating a selective interaction with serotonin receptors. Differential drug potencies in competing for [3H]5-HT and [3H]spiroperidol binding sites suggest that these two [3H]ligands respectively label two distinct populations of receptors, while [3H]LSD labels both the [3H]5-HT and [3H]spiroperidol sites. After incubation of brain membranes with 30 nM spiroperidol, drug specificity of the residual [3H]LSD binding resembles that of receptors labeled by [3H]5-HT. Conversely, drug effects on [3H]LSD binding in the presence of 300 nM 5-HT resembles effects with [3H]spiroperidol. We propose that [3H]5-HT and [3H]spiroperidol label distinct populations of serotonin receptors in rat brain, designated 5-HT1 and 5-HT2 receptors, respectively. [3H]LSD appears to bind to both receptors to a similar extent.

Original languageEnglish (US)
Pages (from-to)687-699
Number of pages13
JournalMolecular Pharmacology
Issue number3
StatePublished - Dec 1 1979

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology


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