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- W1981001328 abstract "Glucagon-like peptide-1 (GLP-1) was predicted, based on the proglucagon gene sequence. It is synthesised by specific post-translational processing in L cells (lower intestine) and secreted mainly as truncated GLP-1 [7-36 amide] in response to nutrient ingestion. Glucagon-like peptide-1 stimulates insulin secretion during hyperglycaemia, suppresses glucagon secretion, stimulates (pro)insulin biosynthesis and decelerates gastric emptying and acid secretion. On intracerebroventricular injection, GLP-1 reduces food intake in rodents. A GLP-1 receptor antagonist or GLP-1 antisera have been shown to reduce meal-stimulated insulin secretion in animals, suggesting that GLP-1 has a physiological incretin function (augmentation of postprandial insulin secretion due to intestinal hormones) for GLP-1. In healthy human subjects, exogenous GLP-1 slows gastric emptying. Consequently, postprandial insulin secretion is reduced, not augmented. Thus, a participation of this peptide in the incretin effect of non-diabetic humans has not been definitely proven. Nevertheless, it has potent insulinotropic activity, especially during hyperglycaemia. This suggests new therapeutic options for patients with Type II (non-insulin-dependent) diabetes mellitus. On the other hand, most L cells are located in the lower small intestine. Potent inhibitory actions of GLP-1 on upper gastrointestinal motor and digestive functions (e. g. gastric emptying and acid secretion) in response to nutrients placed into the ileal lumen, argue for a role of this peptide as an ileal brake. Malassimilation and diarrhea leading to the erroneous presence of nutrients in the lower gut may, via GLP-1, delay gastric emptying and reduce upper gut motility and thereby prevent further caloric losses." @default.
- W1981001328 created "2016-06-24" @default.
- W1981001328 creator A5067359287 @default.
- W1981001328 date "1999-02-19" @default.
- W1981001328 modified "2023-10-16" @default.
- W1981001328 title "Is glucagon-like peptide 1 an incretin hormone?" @default.
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- W1981001328 doi "https://doi.org/10.1007/s001250051165" @default.
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