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  • Title: Prolonged plasma half-life of insulin in patients with a genetic defect of high affinity binding sites.
    Author: Dreyer M, Matthaei S, Kühnau J, Rüdiger HW.
    Journal: Horm Metab Res; 1986 Apr; 18(4):247-9. PubMed ID: 2872151.
    Abstract:
    Plasma clearance of endogenous and intravenously administered insulin was studied in three sibs with severe insulin resistance secondary to an affinity defect of their insulin receptors, and in five healthy controls. Intravenous infusion of somatostatin was used to inhibit the insulin secretion. 0.3 U of insulin/kg body weight was administered as an intravenous bolus. Plasma glucose, immunoreactive insulin and C-peptide were determined subsequently at constant intervals. We found a prolonged plasma half-life of insulin in the three patients, being 33.5 +/- 11.8 min vs 8.2 +/- 2.2 min in controls, P less than 0.002, but a normal half-life of C-peptide. The result indicates, that the plasma insulin clearance is predominantly mediated by intact insulin receptors. We conclude, that insulin has a prolonged half-life in all patients with insulin resistance secondary to an impaired receptor function.
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