Do functional relationships exist between 5-HT1A and 5-HT2 receptors? - PubMed (original) (raw)
Do functional relationships exist between 5-HT1A and 5-HT2 receptors?
N A Darmani et al. Pharmacol Biochem Behav. 1990 Aug.
Abstract
To investigate the possible functional relationship between 5-HT1 and 5-HT2 receptors, we studied the effects of a nonselective 5-HT agonist (5-MeO DMT), a 5-HT1A-selective (8-OH-DPAT) and a 5-HT1B/5-HT1C-selective (TFMPP) agonist on the head-twitch behavior induced by the putative 5-HT2-selective receptor agonist (+/-)-DOI. In the mouse (+/-)-DOI produced the head-twitch response in a dose-dependent manner and (-)-DOI was twice as potent as the (+) isomer. Selective 5-HT2 antagonists, ketanserin and spiperone, dose-dependently inhibited the (+/-)-DOI-induced head-twitch response. The nonselective and the 5-HT1A-selective agonists also dose-dependently reduced the behavior, whereas 5-HT1B/5-HT1C-selective agonist (TFMPP) failed to affect the (+/-)-DOI-induced response. Taken together with previously published literature data, we propose a 5-HT1A inhibitory action on the 5-HT2 receptor-mediated response when induced by its selective agonist (+/-)-DOI.
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