Sweettaste Receptors and the Secretion of Glucagon-like Peptide-1 and Peptide YY

2014-08-27 03:15:10 | BioPortfolio


The purpose of this study is to determine the functional significance of sweet taste receptors in the secretion of GI satiety peptides by using a specific sweet taste receptor antagonist to block sweet taste perception in the gut.


There is strong evidence that taste signaling mechanisms identified in the oral epithelium also operate in the gut. It is suggested that open-type enteroendocrine cells directly sense nutrient via alpha-gustducin coupled taste receptors to modulate the secretion of glucagon like peptide-1 (GLP-1) and peptide YY (PYY). Several nutrient responsive G-protein coupled receptors have been identified in the human gut, including the sweet taste responsive T1R2/T1R3 heterodimer, the amino acid/umami responsive T1R1/T1R3 as well as GPR120 for unsaturated long-chain free fatty acids.The functional significance of sweet taste receptors in glucose stimulated secretion of GLP-1 and PYY will be determined by intragastric infusion of 75 g glucose with or without different concentrations of lactisole, a sweet taste receptor antagonist (150, 300, 450 ppm) in a double blind, 4 way crossover trial including 16 healthy subjects (4 male, 4 female).

Study Design

Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Pharmacodynamics Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Basic Science


Gastrointestinal Satiety Peptides




University Hospital Basel, Clinical Research Center




University Hospital, Basel, Switzerland

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:15:10-0400

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Medical and Biotech [MESH] Definitions

A peptide, of about 33 amino acids, secreted by the upper INTESTINAL MUCOSA and also found in the central nervous system. It causes gallbladder contraction, release of pancreatic exocrine (or digestive) enzymes, and affects other gastrointestinal functions. Cholecystokinin may be the mediator of satiety.

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Peptides generated from AMYLOID BETA-PEPTIDES PRECURSOR. An amyloid fibrillar form of these peptides is the major component of amyloid plaques found in individuals with Alzheimer's disease and in aged individuals with trisomy 21 (DOWN SYNDROME). The peptide is found predominantly in the nervous system, but there have been reports of its presence in non-neural tissue.

Drugs used for their effects on the gastrointestinal system, as to control gastric acidity, regulate gastrointestinal motility and water flow, and improve digestion.

Behavioral response associated with the achieving of gratification.

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