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Trends Endocrinol Metab. 2010 Feb;21(2):59-67. doi: 10.1016/j.tem.2009.11.007. Epub 2009 Dec 16.

Insulin-like actions of glucagon-like peptide-1: a dual receptor hypothesis.

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1
Laboratory of Molecular Endocrinology, Massachusetts General Hospital, Boston, MA 02114, USA.

Abstract

GLP-1 (9-36)amide is the cleavage product of GLP-1(7-36) amide, formed by the action of diaminopeptidyl peptidase-4 (Dpp4), and is the major circulating form in plasma. Whereas GLP-1(7-36)amide stimulates glucose-dependent insulin secretion, GLP-1(9-36)amide has only weak partial insulinotropic agonist activities on the GLP-1 receptor, but suppresses hepatic glucose production, exerts antioxidant cardioprotective actions and reduces oxidative stress in vasculature tissues. These insulin-like activities suggest a role for GLP-1 (9-36)amide in the modulation of mitochondrial functions by mechanisms independent of the GLP-1 receptor. In this paper, we discuss the current literature suggesting that GLP-1(9-36)amide is an active peptide with important insulin-like actions. These findings have implications in nutrient assimilation, energy homeostasis, obesity, and the use of Dpp4 inhibitors for the treatment of diabetes.

PMID:
20018525
PMCID:
PMC4085161
DOI:
10.1016/j.tem.2009.11.007
[Indexed for MEDLINE]
Free PMC Article
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