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Diabetes, Vol 38, Issue 10 1226-1230, Copyright © 1989 by American Diabetes Association

ARTICLES

Whole-plasma and high-density lipoprotein subfraction surface lipid composition in IDDM men

JD Bagdade and PV Subbaiah
Department of Medicine, Rush Medical College, Chicago, Illinois.

To determine whether compositional abnormalities are present in high-density lipoprotein (HDL) in patients with insulin-dependent diabetes mellitus (IDDM) that might negate its putatively protective cardiovascular effects, we studied the plasma lipoproteins of 12 men with varying degrees of clinical control (mean fasting glucose 193 +/- 10 mg/dl, mean glycoalbumin greater than 73% above control mean). The diabetic patients' basal plasma triglyceride, total- and free- (unesterified) cholesterol, HDL cholesterol (HDL-chol), and apolipoprotein AI, AII, and B concentrations were similar to those of control subjects, but the free-cholesterol-to-lecithin ratio, a new index of cardiovascular disease risk, was significantly increased in their plasma (0.97 +/- 0.14 vs. 0.88 +/- 0.07, P less than .02) and their very-low-density lipoprotein (VLDL)-low-density lipoprotein (LDL) subfraction (1.50 +/- 0.51 vs. 1.08 +/- 0.15, P less than .005). Although HDL2-chol was similar in diabetic and control groups, the HDL2-chol-to-free-cholesterol ratio (diabetic vs. control, 4.64 +/- 1.7 vs. 1.96 +/- 1.0 mumol/ml, P less than .025) and the sphingomyelin-to-lecithin ratio (0.23 +/- 0.08 vs. 0.20 +/- 0.09, P less than .025) were both significantly increased in the IDDM group. HDL3-chol was higher in the IDDM than in the control subjects (diabetic vs. control, 38.6 +/- 5.2 vs. 32.7 +/- 2.7 mg/dl, P less than .005). In contrast to whole plasma and the VLDL + LDL subfraction, the free-cholesterol-to-lecithin ratio of IDDM and control HDL subfractions were similar.(ABSTRACT TRUNCATED AT 250 WORDS)
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[Abstract] [Full Text]


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Copyright © 1989 by the American Diabetes Association.