Add time:07/21/2019         Source:sciencedirect.com

This study was aimed at exploring the role of 5-HT2/5-HT1C neurotransmission in male rat sexual behavior. The administration of the 5-HT2/5-HT1C agonist, 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) (1 mg/kg), suppressed sexual activity in most of the animals. The suppressive effect of DOI was antagonized by treatment with amperozide, a selective 5-HT2 receptor antagonist, in doses which did not by themselves affect sexual activity. In addition, several other serotonin antagonists were tested with varying affinity profiles for 5-HT2/5-HT1C receptors, including ketanserin, ritanserin, and mesulergine. All these compounds antagonized the suppressive action of DOI. In contrast, no antagonizing effect was obtained by treatment with (−)-alprenolol, a 5-HT1A antagonist. The present findings suggest that 5-HT2/5-HT1C receptors might be involved in the neural control of male rat sexual behavior, presumably by exerting an inhibitory influence on the behavior.

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