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  • Title: [Behavior of C-peptide and immunoreactive insulin in essential obesity].
    Author: Gragnoli G, Signorini AM, Tanganelli I, Martinelli G.
    Journal: Boll Soc Ital Biol Sper; 1979 Mar 30; 55(6):564-70. PubMed ID: 399187.
    Abstract:
    The levels of glucose, immunoreactive insulin and C-peptide were studied in 13 obese patients and 10 control subjects, in basal conditions and after an oral glucose load (OGTT). The IRI and C-peptide levels were higher in the obese patients than in the controls either during fasting or during the OGTT. The C-peptide/IRI ratio decreased after the oral glucose load in both groups studied. However in the obese subjects the values for the C-peptide/IRI ratio were lower than those found in the controls during the same observation period. These results suggest the hypothesis that in the obese patients the high IRI levels which reflect an increased insulin secretion, are, at least in part, due to an early saturation of the hepatic degradation of insulin and/or to a decrease in the specific receptor sites normally present in the cell membranes.
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