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Glucagon-Like Peptide-1: An Insulinotropic Hormone With Potent Growth Factor Actions at the Pancreatic Islets of Langerhans

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Molecular Basis of Pancreas Development and Function

Part of the book series: Endocrine Updates ((ENDO,volume 11))

Abstract

Identification of chemical mediators that support pancreatic (3-cell neogenesis, differentiation, growth, and survival offers the prospect for introduction of novel therapeutic strategies in the treatment of diabetes mellitus. One such chemical mediator is glucagon-like peptide-1 (GLP-1), an intestinally-derived blood glucose-lowering hormone that is a potential therapeutic agent for use in treatment of adult-onset diabetes mellitus (type 2 diabetes) (1-4). GLP-1 exerts a direct action at the pancreatic islets of Langerhans to stimulate biosynthesis and secretion of insulin, thereby lowering levels of blood glucose. Additional effects of GLP-1 at the islets include stimulation of DNA synthesis, increased cellular proliferation, and alterations in the pattern of gene expression that are critical to maintenance of a fully differentiated 13-cell phenotype. Such growth factor-like effects of GLP- 1 suggest its possible usefulness as a stimulus for de novo production of islets in diabetic subjects, or for ex vivo expansion of (3-cells in islets isolated for purposes of transplantation. It is also appreciated that GLP- 1 acts within the central nervous system as an appetite suppressant (5,6). This surprising finding suggests an additional beneficial action of GLP-1 for treatment of eating disorders, obesity, and/or adipogenic diabetes mellitus.

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Holz, G.G., Leech, C.A. (2001). Glucagon-Like Peptide-1: An Insulinotropic Hormone With Potent Growth Factor Actions at the Pancreatic Islets of Langerhans. In: Habener, J.F., Hussain, M.A. (eds) Molecular Basis of Pancreas Development and Function. Endocrine Updates, vol 11. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1669-9_7

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