Why cholecystokinin and gastrin are also incretins

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This review argues that cholecystokinin (CCK) and gastrin are incretins. The insulin cells are equipped with CCK2/gastrin receptors. CCK/gastrin peptides stimulate insulin secretion and potentiate the incretin effect of glucagon-like peptide-1. CCK/gastrin and insulin are released in significant amounts during normal mixed meals even at modest changes in blood glucose concentrations. Treatment of diabetes patients with combinatorial glucagon-like peptide-1 and CCK or gastrin-derived constructs therefore provides an expedient option.

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