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Ileal release of glucagon-like peptide-1 (GLP-1)

Association with inhibition of gastric acid secretion in humans

  • Esophageal, Gastric, And Duodenal Disorders
  • Published:
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Abstract

There is evidence that the distal intestine participates in the regulation of gastric motor and secretory function. It was the aim of this study to examine in greater detail the effects of ileal nutrient exposure on human gastric acid secretion and to investigate potential intermediary mechanisms. Twelve normal subjects were intubated with an oroileal multilumen tube assembly for gastric, duodenal, and ileal perfusion of marker and test solutions, aspiration, and intestinal manometry. We studied ileal effects on gastric acid output in the unstimulated, interdigestive state (during early phase II,N=6), and during endogenous stimulation by intraduodenal essential amino acid perfusion,N=6) and on release of candidate humoral mediators, peptide YY (PYY) and glucagonlike peptide-1 (GLP-1), both known inhibitors of human gastric acid secretion. Compared with ileal saline perfusion, ileal carbohydrate (total caloric load: 60 kcal) decreased interdigestive gastric acid output by 64% (P<0.01), and endogenously stimulated output by 68%, respectively (P<0.005). Under all experimental conditions, ileal carbohydrate increased plasma GLP-1 by 80–100% (allP<0.005). Ileal lipid perfusion had similar inhibitory effects on gastric acid output and stimulatory effects on GLP-1 release as had ileal carbohydrate. By contrast, ileal perfusion with peptone had no or only weak effects on either acid output or plasma GLP-1. Plasma PYY concentrations and suppression of gastric secretion in response to ileal perfusions were not correlated. In humans, both interdigestive and endogenously stimulated gastric acid output are inhibited in response to intraileal carbohydrate or lipids, but not protein, Decreased acid output is associated with release of GLP-1, but not PYY. These findings support the hypothesis that the distal small intestine may participate in the late postprandial inhibitory regulation of gastric secretory function in humans and that GLP-1 may be an intermediary factor.

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Authors and Affiliations

  1. From the Division of Gastroenterology, Department of Medicine, University of Essen, Germany

    Peter Layer MD, Jens Juul Holst, Daniel Grandt & Harald Goebell

  2. Department of Medical Physiology, University of Copenhagen, Denmark

    Peter Layer MD, Jens Juul Holst, Daniel Grandt & Harald Goebell

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  1. Peter Layer MD
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  2. Jens Juul Holst
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  3. Daniel Grandt
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  4. Harald Goebell
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This work was supported by Deutsche Forschungsgemeinschaft, grant La 483/5-2, and Danish Medical Research Council.

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Layer, P., Juul Holst, J., Grandt, D. et al. Ileal release of glucagon-like peptide-1 (GLP-1). Digest Dis Sci 40, 1074–1082 (1995). https://doi.org/10.1007/BF02064202

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  • DOI: https://doi.org/10.1007/BF02064202

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