Plasma lipids, lipoproteins, apolipoproteins and lecithin: cholesterol acyltransferase (LCAT) activity were measured in 89 diabetic patients (53 males and 36 females) on insulin treatment in addition to diet control and exercise before and after admission.
The following results compared to the pre-admission were obtained at the time of discharge:
(1) Body weight, fasting blood glucose, triglyceride, total cholesterol, apolipoproteins (A-I, A-II, B, C-II, E) and insulin levels were significantly decreased.
(2) The apolipoprotein A-I/A-II ratio was significantly increased from 4.8 to 5.1 (P<0.001)
(3) The plasma level of HDL 2-cholesterol was not changed: however HDL 3-cholesterol was significantly decreased, resulting in a significant increase in the HDL 2-cholesterl/HDL 3-cholesterol ratio (P<0.001)
(4) HDL 2-triglyceride and HDL 3-triglyceride levels were not changed.
(5) LCAT activity was significantly decreased from 790 to 637 (nmoles/ml·hour)(P<0.05)
In conclusion, improvement of diabetic control in insulin-treated diabetics during hospitalization resulted in a significant change in the composition of HDL as well as LCAT activity, of which the patterns are atherogenic in lipoprotein metabolism.
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