The effect of continuous subcutaneous insulin infusion on endogenous insulin secretion in type I diabetes.
In an attempt to elucidate possible mechanisms for the success of continuous subcutaneous insulin infusion (CSII), we evaluated the C-peptide response to a standard breakfast in seven type I diabetic patients while they were on conventional insulin treatment and again after 4 wk of near-normal glycemia achieved with CSII. While on conventional therapy their 24-h mean blood glucose level was 211 +/- 12 mg/dl and their glycosylated hemoglobin level was 10.6 +/- 0.6%. After 4 wk of CSII their 24-h mean blood glucose level fell to 95 +/- 7 mg/dl and their glycosylated hemoglobin level fell to 6.5 +/- 0.4%. Plasma C-peptide levels were undetectable in all seven patients both while on conventional therapy and after 4 wk of CSII. We conclude that the success of CSII is related to an improved method of insulin delivery and not to either the selection of type I diabetic patients who have some residual insulin secretory capacity or to some change in endogenous insulin secretion produced by the treatment itself.
D000293:Adolescent; D000328:Adult; D001786:Blood Glucose / Q000378:metabolism; D003920:Diabetes Mellitus / Q000188:drug therapy / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007328:Insulin / Q000008:administration & dosage / Q000378:metabolism*; D007332:Insulin Infusion Systems; D000078790:Insulin Secretion; D007515:Islets of Langerhans / Q000503:physiopathology; D008297:Male; D013997:Time Factors
D001786:Blood Glucose; D007328:Insulin