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  • Title: Vasoactive intestinal peptide causes peristaltic contractions in the esophageal body.
    Author: Rattan S, Grady M, Goyal RK.
    Journal: Life Sci; 1982 May 03; 30(18):1557-63. PubMed ID: 7078354.
    Abstract:
    Vasoactive intestinal peptide (VIP) caused a dose-dependent fall in lower esophageal sphincter (LES) pressure and dose-dependent contractions in the body of the esophagus. The response to VIP in the esophagus or LES was not modified by atropine, phentolamine, haloperidol, pyrilamine, methysergide, indomethacin and tetrodotoxin, showing that is exerts direct action at the esophageal smooth muscle. These studies suggest that VIP causes contraction in the esophageal body and relaxation of the LES by a direct action on the smooth muscle. It is possible that VIP may be the common mediator of noncholinergic, nonadrenergic neurons that cause relaxation of the lower esophageal sphincter and contraction in the esophageal body.
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