Glucagon‐like peptide 1: A potent glycogenic hormone

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Abstract
GLP-1(7–36)amide is an insulinotropic peptide derived from the intestinal post-translational proglucagon process, the release of which is increased mainly after a carbohydrate meal; also, its anti-diabetogenic effect in normal and diabetic states has been reported. In this study, GLP-1(7–36)amide stimulates the formation of glycogen from glucose in isolated rat hepatocytes, such a glycogenic effect being achieved with physiological concentrations of the peptide. The GLP-1(7–36)amide-induced glycogenesis is abolished by glucagon, and it is accompanied by stimulation of the glycogen synthase a activity and by a decrease in the basal and glucagon-stimulated cyclic AMP content. These findings could explain, at least in part, the GLP-1(7–36)amide insulin-independent plasma glucose lowering effect.