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Neurochemistry and Neuropharmacology of Emesis - the Role of Serotonin

Overview
Journal Toxicology
Publisher Elsevier
Specialty Toxicology
Date 2000 Nov 25
PMID 11090957
Citations 34
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Abstract

Emesis is an instinctive defense reaction caused by the somato-autonomic nerve reflex which is integrated in the medulla oblongata. Emesis caused by cytotoxic drugs and radiation is associated with an increase in the concentration of 5-hydroxytryptamine (5-HT) in the intestinal mucosa and in the brainstem. 5-HT released from enterochromaffin (EC) cells, which synthesize and secrete 5-HT, stimulates the 5-HT(3) receptors on the adjacent vagal afferent nerves. This vagal afferent nerve depolarization may evoke the vomiting reflex. This review describes the role of 5-HT in anticancer drug-induced emesis from the viewpoint of 5-HT release from EC cells and afferent vagus nerve activity.

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