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Revisiting the role of glucagon in health, diabetes mellitus and other metabolic diseases

This Review highlights mechanisms of glucagon secretion from pancreatic α-cells, including paracrine actions in islets and α-cell–β-cell crosstalk.

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Islet biology

The endocrine pancreas is composed of clusters of cells, or islets, which secrete endocrine factors important for systemic metabolism, including insulin and glucagon.
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