Glucagon-like peptide-1 receptor and proglucagon expression in mouse skin

Regulatory Peptides
James F ListJoel F Habener

Abstract

Glucagon-like peptide-1 (GLP-1) is an insulinotropic hormone expressed by alternative post-translational processing of proglucagon in the intestines, endocrine pancreas, and brain. The multiple antidiabetogenic actions of GLP-1 include stimulation of the proliferation and differentiation of the insulin-producing beta cells in the pancreas. The GLP-1 receptor is widely distributed and has been identified in the endocrine pancreas, intestinal tract, brain, lung, kidney, and heart. Here we report the expression of the GLP-1 receptor and proglucagon in the skin of newborn mice located predominantly in the hair follicles, as well as in cultures of skin-derived cells that also express nestin, a marker of cultured cells that have dedifferentiated by epithelial to mesenchymal transition. In cultured skin cells, GLP-1 activates the MAPK/ERK signal transduction pathway, associated with cellular proliferation, differentiation, and cytoprotection. No evidence was found for the activation of cAMP or Ca2+ signaling pathways. Further, redifferentiation of cultured skin-derived cells by incubation in differentiation medium containing GLP-1 induced expression of the proinsulin-derived peptide, C-peptide. These findings suggest a possible paracr...Continue Reading

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Oct 27, 2018·Frontiers in Endocrinology·Silvano Paternoster, Marco Falasca
Dec 3, 2021·Cell Biochemistry and Function·Salma M ErakyNada F Abo El-Magd

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