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  • Title: Regulation of A- and B-cell function by insulin and glucagon.
    Author: Fujimoto WY, Ensinck JW.
    Journal: Horm Metab Res; 1981 Oct; 13(10):547-50. PubMed ID: 7028587.
    Abstract:
    In monolayer cultures of pancreases from neonatal rats, glucagon added to the medium (5 or 50 ng/ml) stimulated insulin secretion. In contrast, exogenously added insulin (1.0 mU/ml) inhibited glucagon secretion when glucose was 1.7 or 5.5 mM, but not when glucose was 16.5 mM. This suggests that insulin may reduce glucagon release by enhancing glucose uptake by A-cells. Suppression of glucagon secretion by high glucose (16.5 mM) may be mediated by endogenously released insulin. These observations support the in vivo findings favoring a modulatory interaction between A- and B-cells.
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