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Insulin Secretion and Insulin Sensitivity in Relation to Fasting Glucose in Healthy Subjects
Diabetes Care, 03/05/07

Bo Ahrén, MD, PHD., - Does high, but still normal, fasting glucose contribute to augmented insulin secretion?
>Summary: A total of 148 healthy 50+ year old women underwent a glucose-dependent arginine stimulation test and a 2-h euglycemic-hyperinsulinemic clamp. In the arginine test, arginine (5 g) was injected intravenously under baseline (fasting) conditions and after raising the glucose levels to 15 and >28 mmol/l. From this test, the acute insulin response (AIR) to arginine during the three glucose levels (AIR1, AIR2, and AIR3) were estimated.
Outcomes: The researchers concluded that 1) raised fasting glucose augments baseline and maximal arginine-induced insulin secretion in healthy subjects, and 2) this is associated with reduced insulin sensitivity. This suggests that high, but still normal, fasting glucose may contribute to the augmented insulin secretion in subjects with low insulin sensitivity

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