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  • Title: How insulin resistant are patients with noninsulin-dependent diabetes mellitus?
    Author: Reaven GM, Chen YD, Donner CC, Fraze E, Hollenbeck CB.
    Journal: J Clin Endocrinol Metab; 1985 Jul; 61(1):32-6. PubMed ID: 3889039.
    Abstract:
    The study was carried out to quantify the ability of physiological increases in the plasma insulin concentration to stimulate glucose disposal above basal levels in 25 normal subjects and 25 patients with noninsulin-dependent diabetes mellitus (NIDDM). Patients were sex, age, and weight matched, and glucose disposal was determined under basal conditions (plasma insulin, approximately 10 microU/ml) and after plasma insulin levels had been increased to approximately 90 microU/ml. The mean (+/- SEM) glucose disposal rate was significantly greater (P less than 0.001) under basal conditions in patients with NIDDM (110 +/- 5 mg/m2 X min) than in individuals with normal glucose tolerance (77 +/- 4 mg/m2 X min). Glucose disposal rates increased in both normal subjects and NIDDM patients when plasma insulin concentrations were increased to about 90 microU/ml; however, the increment was much greater in normal subjects. Thus, glucose disposal only rose to a mean (+/- SEM) value of 145 +/- 7 mg/m2 X min in patients with NIDDM, representing an approximate 30% increase due to insulin. In contrast, a similar elevation of plasma insulin in normal subjects resulted in an increase in glucose disposal of approximately 300%, reaching a mean (+/- SEM) value of 310 +/- 24 mg/m2 X min. These results indicate that the defect in insulin-stimulated glucose uptake is significantly greater in patients with NIDDM than has previously been found.
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