Endogenous cholecystokinin in the control of gastric emptying of liquid nutrient loads in rhesus monkeys

T. H. Moran, P. J. Ameglio, G. J. Schwartz, H. J. Peyton, P. R. McHugh

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

A role for the brain/gut peptide cholecystokinin (CCK) in the control of gastric emptying has been proposed. In the present studies, we have used a potent type A CCK-receptor antagonist (devazepide) to examine the quantitative contribution of endogenously released CCK in the control of liquid gastric emptying of 100 ml lipid, protein, and carbohydrate test loads in rhesus monkeys. Emptying was studied in conscious monkeys equipped with chronic indwelling gastric cannulas. Prior intragastric administration of devazepide (1.0-320 μg/kg) differentially affected the 10-min emptying of glucose (0.125 g/ml), peptone (4.5%), and Intralipid (4.5%). Glucose emptying was not affected by any dose of the CCK antagonist. The emptying of peptone was accelerated by doses of 10 μg/kg or higher. This effect, however, was only partial and plateaued at a dose of 100 μg/kg. The gastric emptying of Intralipid was accelerated at a dose of 32 μg/kg, and the inhibitory effect of the Intralipid was completely eliminated at a dose of 320 μg/kg. At this dose of devazepide, the Intralipid test meal emptied from the stomach at the same rate as physiological saline. These data demonstrate that in rhesus monkeys endogenously released CCK 1) does not play a role in the control of glucose emptying, 2) is a partial mediator of the inhibitory action of peptone on gastric emptying, and 3) is the primary inhibitory mediator in the control of the gastric emptying of Intralipid.

Original languageEnglish (US)
Pages (from-to)R371-R375
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume265
Issue number2 34-2
DOIs
StatePublished - 1993
Externally publishedYes

Keywords

  • Macaca mulatta
  • carbohydrate
  • devazepide
  • lipid
  • protein
  • receptor antagonist

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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