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Journal Article
Research Support, Non-U.S. Gov't
Characterization of the late posthypoglycemic insulin resistance in insulin-dependent diabetes mellitus.
Metabolism: Clinical and Experimental 1990 August
The insulin effect (6.5 to 7.5 hours) following hypoglycemia was studied with the euglycemic clamp technique in eight patients with insulin-dependent diabeteses mellitus (IDDM). The results were compared with a control study with the same insulin infusion, but where hypoglycemia was prevented by a glucose infusion. Glucose production (Ra) and utilization (Rd) were evaluated with D-(3-3H) glucose infusion. Hypoglycemia (glucose nadir, 1.5 +/- 0.1 mmol/L) caused a marked increase in cortisol and growth hormone, whereas the release of adrenaline and, in particular, glucagon was low. The plasma free insulin levels were similar in the studies, including during the clamp periods. The glucose infusion rates (GIR) were significantly lower after the hypoglycemia as compared with the control study (control, 2.4 +/- 0.3; hypoglycemia, 1.5 +/- 0.3 mg/kg x min; P less than .05). Thus, hypoglycemia induces prolonged insulin resistance. The posthypoglycemic insulin resistance during a moderate hyperinsulinemic (approximately 30 mU/L) clamp was mainly due to a decreased insulin effect on glucose utilization (control, 2.9 +/- 0.2; hypoglycemia, 2.2 +/- 0.2 mg/kg x min; P less than .02), whereas the insulin effect on glucose production was not significantly different after hypoglycemia.
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