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Kinetic models for insulin disappearance from plasma in type I diabetic patients

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We have tested whether our previous finding in normal subjects that the disappearance of insulin from plasma obeys saturation kinetics alone also applies to type I diabetic patients. In six long-term diabetic patients steady state plasma insulin concentrations resulting from constant insulin infusion at different rates were compared with the predictions of three models for the kinetics of insulin in plasma. The models allowed the existence of non-saturable (first order equation) or saturable (Michaëlis-Menten equation) mechanisms, or both. The minimal acceptable model included saturation kinetics alone in four subjects and first order kinetics alone in two subjects. The clearance of insulin in diabetic patients, calculated from the best fitting model, was 18.0 (median, range 10.0-23.7) ml X kg-1 X min.-1 versus 25.0 (18.6-47.1) ml X kg-1 X min.-1 in six normal subjects (2p = 0.008). Insulin thus disappears from plasma at a lower rate in diabetic patients than in normal subjects at physiological plasma concentrations.

Original languageEnglish
JournalPharmacol Toxicol
Issue number2
Pages (from-to)90-5
Number of pages6
Publication statusPublished - Feb 1987

    Research areas

  • Adult, Diabetes Mellitus, Type 1, Female, Humans, Insulin, Kinetics, Male, Metabolic Clearance Rate, Middle Aged, Models, Biological

ID: 44941323