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The functional involvement of gut-expressed sweet taste receptors in glucose-stimulated secretion of glucagon-like peptide-1 (GLP-1) and peptide YY (PYY)


Steinert, R E; Gerspach, A C; Gutmann, H; Asarian, L; Drewe, J; Beglinger, C (2011). The functional involvement of gut-expressed sweet taste receptors in glucose-stimulated secretion of glucagon-like peptide-1 (GLP-1) and peptide YY (PYY). Clinical Nutrition, 30(4):524-532.

Abstract

BACKGROUND & AIMS:

Enteroendocrine cells are thought to directly sense nutrients via α-gustducin coupled taste receptors (originally identified in the oral epithelium) to modulate the secretion of glucagon-like peptide-1 (GLP-1) and peptide YY (PYY).
METHODS:

We measured mRNA expression of α-gustducin and T1R3 along the human gut; immunohistochemistry was used to confirm co-localization with GLP-1. Functional implication of sweet taste receptors in glucose-stimulated secretion of GLP-1 and PYY was determined by intragastric infusion of glucose with or without lactisole (a sweet taste receptor antagonist) in 16 healthy subjects.
RESULTS:

α-gustducin was expressed in a region-specific manner (predominantly in the proximal gut and less in ileum and colon, P < 0.05). Both, T1R3 and α-gustducin were co-localized with GLP-1. Glucose-stimulated secretions of GLP-1 (P = 0.026) and PYY (P = 0.034) were reduced by blocking sweet receptors with lactisole.
CONCLUSION:

Key proteins implicated in taste signaling are present in the human gut and co-localized with GLP-1 suggesting that these proteins are functionally linked to peptide secretion from enteroendocrine cells. Glucose-stimulated secretion of GLP-1 and PYY is reduced by a sweet taste antagonist, suggesting the functional involvement of gut-expressed sweet taste receptors in glucose-stimulated secretion of both peptides in humans.

Copyright © 2011 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.

BACKGROUND &#38; AIMS:

Enteroendocrine cells are thought to directly sense nutrients via α-gustducin coupled taste receptors (originally identified in the oral epithelium) to modulate the secretion of glucagon-like peptide-1 (GLP-1) and peptide YY (PYY).
METHODS:

We measured mRNA expression of α-gustducin and T1R3 along the human gut; immunohistochemistry was used to confirm co-localization with GLP-1. Functional implication of sweet taste receptors in glucose-stimulated secretion of GLP-1 and PYY was determined by intragastric infusion of glucose with or without lactisole (a sweet taste receptor antagonist) in 16 healthy subjects.
RESULTS:

α-gustducin was expressed in a region-specific manner (predominantly in the proximal gut and less in ileum and colon, P < 0.05). Both, T1R3 and α-gustducin were co-localized with GLP-1. Glucose-stimulated secretions of GLP-1 (P = 0.026) and PYY (P = 0.034) were reduced by blocking sweet receptors with lactisole.
CONCLUSION:

Key proteins implicated in taste signaling are present in the human gut and co-localized with GLP-1 suggesting that these proteins are functionally linked to peptide secretion from enteroendocrine cells. Glucose-stimulated secretion of GLP-1 and PYY is reduced by a sweet taste antagonist, suggesting the functional involvement of gut-expressed sweet taste receptors in glucose-stimulated secretion of both peptides in humans.

Copyright © 2011 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Institute of Veterinary Physiology
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Date:2011
Deposited On:18 Mar 2012 18:51
Last Modified:05 Apr 2016 15:39
Publisher:Elsevier
ISSN:0261-5614
Publisher DOI:10.1016/j.clnu.2011.01.007
PubMed ID:21324568
Permanent URL: http://doi.org/10.5167/uzh-59803

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