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J Appl Physiol 39: 479-481, 1975;
8750-7587/75 $5.00
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Journal of Applied Physiology, Vol 39, Issue 3 479-481, Copyright © 1975 by American Physiological Society

ARTICLES

Effect of prostaglandin E2 on esophageal motility in man

A. Mukhopadhyay, S. Rattan and R. K. Goyal

Studies were performed to investigate the effect of prostaglandin E2 on esophageal motility in 12 healthy volunteers. PGE2 infusion caused a dose-dependent reduction in the lower esophageal sphincter pressure. The threshold dose was less than 0.05 mug-kg-1-min-1 and maximal reduction of pressure (60%) occurred with a dose of 0.4 mug-kg-1-min-1. In contrast to its effect on the lower esophageal sphincter, PGE2 did not alter the pressure in the upper esophageal sphincter. PGE2 did not influence resting esophageal pressures; the amplitude of peristaltic contractions was reduced in the lower but not in the upper part of the body of the esophagus. These studies show that in man PGE2 exerts selective inhibitory influence on the activity of the lower part of the esophagus and lower esophageal sphincter which are composed of smooth muscle fibers.


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