Abstract
We recently reported that the nonmetabolizable glucose analogue, 3-O-methylglucose, stimulates somatostatin secretion in the perfused dog pancreas. In this study, we report that 3-O-methylglucose also stimulates insulin secretion in the dog pancreas. The effect was present at 5.5 mM glucose (p < 0.001) but not at O or 2.7 mM glucose. The inhibitor of glucose metabolism, mannoheptulose, blocked the insulinotropic action of 3-O-methylglucose. In contrast, 3-O-methylglucose had no effect on insulin secretion in the perfused rat pancreas. We conclude that 3-O-methylglucose stimulates insulin secretion in the dog and that the effect requires the presence of stimulatory concentrations of D-glucose.
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