PMID: 3768392Nov 14, 1986Paper

Apolipoproteins B, C-III and E in two major subpopulations of low-density lipoproteins

Biochimica Et Biophysica Acta
D M Lee, P Alaupovic

Abstract

To determine the concentration and distribution of apolipoproteins C-III and E in low density lipoproteins (LDL) of d 1.025-1.043 g/ml, fresh human plasma was fractionated by single-spin density gradient ultracentrifugation into five layers. Two major subpopulations including layer 2 (d 1.025-1.029 g/ml) and layer 3 (d 1.032-1.043 g/ml) were isolated and characterized by determination of flotation coefficient, neutral lipids and apolipoproteins B, C-III and E. The apolipoprotein B/C-III/E ratio of layer 2 was 100/(3.3 +/- 2.0)/(5.1 +/- 2.9) (wt/wt) and that of layer 3 was 100/(0.61 +/- 0.32)/(0.58 +/- 0.29) (wt/wt). These weight ratios corresponded to molar ratios of 1.0/(1.90 +/- 1.16)/(0.74 +/- 0.42) and 1.0/(0.34 +/- 0.18)/(0.08 +/- 0.04), respectively. Layer 2 contained 6-23% of the total plasma apolipoprotein B or 7-27% of total LDL2 (d 1.019-1.063 g/ml) apolipoprotein B. Layer 3 contained 41-65% of plasma apolipoprotein B or 62-86% of LDL2 apolipoprotein B. About 5-17% of apolipoprotein C-III and 8-30% of apolipoprotein E in plasma are distributed in layers 2 and 3 with the majority present in layer 2. These results show an evident apolipoprotein heterogeneity of LDL2 isolated from normolipidemic subjects. Moreover, they ...Continue Reading

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Citations

Oct 4, 2003·Current Atherosclerosis Reports·Petar Alaupovic
Sep 6, 2012·European Journal of Clinical Nutrition·N FaghihniaR M Krauss
Jun 20, 2014·Arteriosclerosis, Thrombosis, and Vascular Biology·Frank M Sacks, H Bryan Brewer
Jan 1, 1995·Arteriosclerosis, Thrombosis, and Vascular Biology·D M DreonR M Krauss
Mar 12, 1990·Biochimica Et Biophysica Acta·V S KamannaD M Lee
Apr 14, 1987·Biochemical and Biophysical Research Communications·D M LeeT Mok

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