Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0403608 (ureter)
 9,655 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The influence of serotonin (5-hydroxytryptamine, 5-HT) on human ureteral smooth muscle was explored in a series of in vitro experiments. 5-HT evoked a dose-dependent contraction of the ureter. The effect of 5-HT was unaltered by blockade of 5HT3 and 5HT4 receptors and muscarinic cholinergic receptors. The 5HT2 receptor antagonist ketanserin (KT; 10(-5)-10(-4) M) and mixed 5HT1/5HT2 receptor antagonist methysergide (MS; 5 x 10(-5) M) inhibited the effect of 5-HT. Since the antagonist dissociation constant at 5HT2 receptors for both KT and MS is found to be approximately 10(-9) M, it is concluded that this contractile effect may have been mediated by some other, as yet uncharacterized 5-HT receptor. We believe that 5-HT is a potential neurotransmitter in the human upper ureteral smooth muscle.
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PMID:Influence of serotonin on the human ureter: an in vitro pharmacological study. 858 66