Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/78590
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Type: Journal article
Title: Effects of taurocholic acid on glycemic, glucagon-like peptide-1, and insulin responses to small intestinal glucose infusion in healthy humans
Author: Wu, T.
Bound, M.
Standfield, S.
Jones, K.
Horowitz, M.
Rayner, C.
Citation: Journal of Clinical Endocrinology and Metabolism, 2013; 98(4):718-722
Publisher: Endocrine Society
Issue Date: 2013
ISSN: 0021-972X
1945-7197
Statement of
Responsibility: 
Tongzhi Wu, Michelle J. Bound, Scott D. Standfield, Karen L. Jones, Michael Horowitz, and Christopher K. Rayner
Abstract: CONTEXT: In vitro and animal studies suggest that bile acids have the capacity to reduce blood glucose by stimulating glucagon-like peptide-1 (GLP-1) and, thereby, insulin. OBJECTIVE: This study evaluated the effects of intrajejunal taurocholic acid (TCA) on blood glucose, GLP-1, and insulin responses to jejunal glucose infusion in healthy men. PARTICIPANTS AND DESIGN: Ten healthy men were each studied on 2 days in a double-blind, randomized order. After the subjects fasted overnight, a jejunal catheter was positioned and a balloon inflated 30 cm beyond the pylorus with aspiration of endogenous bile. Two grams TCA in saline, or saline control, was infused beyond the balloon over 30 minutes, followed by 2 g TCA or control, together with 60 g glucose, over the next 120 minutes. Blood was sampled frequently for the measurements of blood glucose, total GLP-1, insulin, C-peptide, and glucagon. RESULTS: Intrajejunal infusion of TCA alone (t = −30 to 0 minutes) had no effect on blood glucose, GLP-1, insulin, C-peptide, or glucagon concentrations. During intrajejunal glucose infusion (t = 0 to 120 minutes), blood glucose concentrations were lower (P < .001), and plasma GLP-1 (P < .001) and the C-peptide/glucose ratio (P = .008) were both greater, whereas plasma insulin, C-peptide, and glucagon levels were not significantly different after TCA than after control. CONCLUSIONS: In healthy humans, small intestinal infusion of TCA potently reduces the glycemic response to small intestinal glucose, associated with an increase in GLP-1 and C-peptide/glucose ratio. These observations indicate the potential for bile acid-based therapy in type 2 diabetes.
Keywords: Intestine, Small; Humans; Taurocholic Acid; Glucagon; Insulin; C-Peptide; Glucose; Blood Glucose; Cholagogues and Choleretics; Double-Blind Method; Infusion Pumps; Adult; Health; Male; Glucagon-Like Peptide 1
Rights: Copyright © 2013 by The Endocrine Society
RMID: 0020127811
DOI: 10.1210/jc.2012-3961
Grant ID: http://purl.org/au-research/grants/nhmrc/627011
Appears in Collections:Medicine publications

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