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Type: Journal article
Title: Load-dependent effects of duodenal glucose on glycemia, gastrointestinal hormones, antropyloroduodenal motility, and energy intake in healthy men
Author: Pilichiewicz, A.
Chaikomin, R.
Brennan, I.
Wishart, J.
Rayner, C.
Jones, K.
Smout, A.
Horowitz, M.
Feinle-Bisset, C.
Citation: American Journal of Physiology-Endocrinology and Metabolism, 2007; 293(3):E743-E753
Publisher: Amer Physiological Soc
Issue Date: 2007
ISSN: 0193-1849
Statement of
Amelia N. Pilichiewicz, Reawika Chaikomin, Ixchel M. Brennan, Judith M. Wishart, Christopher K. Rayner, Karen L. Jones, Andre J. P. M. Smout, Michael Horowitz, and Christine Feinle-Bisset
Abstract: Gastric emptying is a major determinant of glycemia, gastrointestinal hormone release, and appetite. We determined the effects of different intraduodenal glucose loads on glycemia, insulinemia, glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP) and cholecystokinin (CCK), antropyloroduodenal motility, and energy intake in healthy subjects. Blood glucose, plasma hormone, and antropyloroduodenal motor responses to 120-min intraduodenal infusions of glucose at 1) 1 ("G1"), 2) 2 ("G2"), and 3) 4 ("G4") kcal/min or of 4) saline ("control") were measured in 10 healthy males in double-blind, randomized fashion. Immediately after each infusion, energy intake at a buffet meal was quantified. Blood glucose rose in response to all glucose infusions (P < 0.05 vs. control), with the effect of G4 and G2 being greater than that of G1 (P < 0.05) but with no difference between G2 and G4. The rises in insulin, GLP-1, GIP, and CCK were related to the glucose load (r > 0.82, P < 0.05). All glucose infusions suppressed antral (P < 0.05), but only G4 decreased duodenal, pressure waves (P < 0.01), resulted in a sustained stimulation of basal pyloric pressure (P < 0.01), and decreased energy intake (P < 0.05). In conclusion, variations in duodenal glucose loads have differential effects on blood glucose, plasma insulin, GLP-1, GIP and CCK, antropyloroduodenal motility, and energy intake in healthy subjects. These observations have implications for strategies to minimize postprandial glycemic excursions in type 2 diabetes.
Keywords: Duodenum; Pylorus; Humans; Insulin Resistance; Hormones; Insulin; Glucose; Energy Intake; Gastrointestinal Motility; Postprandial Period; Adult; Male
Description: Copyright © 2007 by the American Physiological Society.
Provenance: First published July 3, 2007
RMID: 0020070826
DOI: 10.1152/ajpendo.00159.2007
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Appears in Collections:Medicine publications

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