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  • Title: The effects of glucagon-like peptide-I (GLP-I) on hormone secretion from isolated human pancreatic islets.
    Author: Fehmann HC, Hering BJ, Wolf MJ, Brandhorst H, Brandhorst D, Bretzel RG, Federlin K, Göke B.
    Journal: Pancreas; 1995 Aug; 11(2):196-200. PubMed ID: 7479679.
    Abstract:
    Glucagon-like peptide-I (GLP-I) is a potent incretin hormone that is now considered as a new therapeutic tool in the treatment of diabetes mellitus. In this study we characterized the effects of GLP-I on peptide hormone release from isolated human pancreatic islets. GLP-I stimulated insulin release in the presence of 10 mM glucose (2.8 mM glucose, 100%; 10 mM glucose, 166%; 10 mM glucose + 10 nM GLP-I, 222%) but had only a weak insulinotropic effect (128%) at 2.8 mM glucose. Glucagon release was inhibited by 10 mM glucose (2.8 mM glucose, 100%; 10 mM glucose, 72%) and by 10 nM GLP-I at 2.8 mM glucose (67%). Somatostatin secretion was increased by 10 mM glucose (2.8 mM glucose, 100%; 10 mM glucose, 166%). GLP-I stimulated somatostatin release in the presence of 2.8 mM glucose (172%). Pancreatic polypeptide (PP) secretion was enhanced by 10 mM glucose (2.8 mM glucose, 100%; 10 mM glucose, 236%). GLP-I induced PP release only in the presence of 2.8 mM glucose (184%).
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