Unmasking of the inhibitory action of glucose on insulin release after alpha 2-adrenergic activation.


Insulin release in response to glucose was measured after culture of islets from ob/ob-mice in a Ca2+-deficient medium. The stimulatory effect of 20 mM glucose disappeared after addition of 1 microM L-epinephrine, and it was reversed into inhibition when the medium contained 0.1 to 10 microM clonidine. Glucose inhibited insulin release also after activation… (More)


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