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  • Title: Demonstration of glucose inhibition of insulin release in the presence of diazoxide.
    Author: Bergsten P, Hellman B.
    Journal: Acta Endocrinol (Copenh); 1987 Jun; 115(2):170-4. PubMed ID: 3300126.
    Abstract:
    beta-Cell-rich pancreatic islets from ob/ob mice were taken for measurements of insulin release in response to glucose after culture in RPMI 1640 medium. The stimulatory effect of 20 mmol/l glucose was converted into an inhibition when the medium was supplemented with 400 mumol/l diazoxide. Glucose inhibition of insulin release was observed when the islets had been cultured in the presence of 1 or 20 mmol/l glucose in media either containing or lacking Ca2+. The data provide further evidence for an inhibitory component in the action of glucose on insulin release, suggesting that glucose stimulation of the Ca2+ efflux is essential for the appearance of this inhibition.
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