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Carbohydrate-induced secretion of glucose-dependent insulinotropic polypeptide and glucagon-like peptide-1.


ABSTRACT: Glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) are the incretin hormones secreted from enteroendocrine K-cells and L-cells, respectively, by oral ingestion of various nutrients including glucose. K-cells, L-cells and pancreatic β-cells are glucose-responsive cells with similar glucose-sensing machinery including glucokinase and an adenosine triphosphate-sensitive K(+) channel comprising KIR6.2 and sulfonylurea receptor 1. However, the physiological role of the adenosine triphosphate-sensitive K(+) channel in GIP secretion in K-cells and GLP-1 secretion in L-cells is not elucidated. Recently, it was reported that GIP and GLP-1-producing cells are present also in pancreatic islets, and islet-derived GIP and GLP-1 contribute to glucose-induced insulin secretion from pancreatic β-cells. In this short review, we focus on GIP and GLP-1 secretion by monosaccharides, such as glucose or fructose, and the role of the adenosine triphosphate-sensitive K(+) channel in GIP and GLP-1 secretion.

SUBMITTER: Seino Y 

PROVIDER: S-EPMC4854501 | biostudies-other | 2016 Apr

REPOSITORIES: biostudies-other

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