NORMALIZATION OF THE INSULIN SENSITIVITY AND THE CELLULAR INSULIN BINDING DURING TREATMENT OF OBESE DIABETICS FOR ONE YEAR

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Abstract
The relative importance of insulin resistance, decreased cellular insulin binding and relative insulin deficiency in the pathogenesis of diabetes mellitus in obese subjects was studied. Ten obese diabetics were studied before and during treatment for 1 yr with a 1200-1500 kcal diet. No change was found in the insulin response to i.v. injection of glucose during treatment (P < 0.1), whereas the insulin sensitivity was normalized after 1 yr (P < 0.01). In parallel to the clinical normalization and the improvement of the insulin sensitivity, the insulin binding to monocytes was normalized (P < 0.01). Both the insulin resistance and the relative insulin deficiency are of decisive importance in the pathogenesis of diabetes mellitus of the obese. The insulin receptor defect seems to be one of the major factors responsible for the insulin resistance.