Oral prostaglandin E analogues induce intestinal migrating motor complexes after a meal in dogs. Evidence for a central mechanism

Gastroenterology
G StaumontL Buéno

Abstract

The effects of oral, intravenous, and intracerebroventricular administration of synthetic derivatives of prostaglandins E1 (misoprostol) and E2 (enprostil) on postprandial gastrointestinal motility were investigated in dogs chronically fitted with strain gauge transducers on the antrum and the proximal and middle jejunum. Synthetic prostaglandin E analogues administered orally at a dose of 20-50 micrograms/kg 15 min before the meal did not modify the postprandial pattern of gastric contractions but suppressed the spontaneous postprandial irregular activity on the jejunum and induced a cyclic pattern of migrating motor complexes for 4-6 h after the meal. These postprandial migrating motor complexes induced by prostaglandin E were propagated between the two recording sites and had a period similar to that observed in the fasted state. However, the duration of phase 2 was significantly increased and the amplitude of the phase 3 decreased. This jejunal cyclic motor pattern was reproduced by administration of synthetic prostaglandin E derivatives either intravenously (4-10 micrograms/kg) 15 min before the meal or intracerebroventricularly (50 ng/kg) 1 h after the meal. The intestinal migrating motor complex activity observed after o...Continue Reading

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