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Research Article| Volume 33, ISSUE 5, P765-774, May 1992

Correlations of plasma lipoproteins with LDL subfractions by particle size in men and women.

Open AccessPublished:May 01, 1992DOI:https://doi.org/10.1016/S0022-2275(20)41440-3
Correlations of plasma lipoproteins with LDL subfractions by particle size in men and women.
Previous ArticleIn vivo metabolism of a mutant apolipoprotein, apoA-IIowa, associated with hypoalphalipoproteinemia and hereditary systemic amyloidosis.
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      Nondenaturing gradient gel electrophoresis of plasma low density lipoprotein (LDL) has been used to identify major LDL subclasses that are influenced by genetic and other factors. In the present paper, this technique has been extended by measuring absorbance of lipid- or protein-stained gels as an index of concentration at intervals of 0.05 nm across the entire LDL particle size range (21.8-30 nm) in moderately overweight men (n = 115) and women (n = 78). When LDL absorbance levels were correlated with other lipoprotein variables, we found that the strengths of the correlations with each of triglycerides, apolipoprotein (apo) B, high density lipoprotein (HDL)2, and apoA-I achieve relative maximum values for two regions within the small LDL range (21-26 nm), one within LDL-IVB (22-23.2 nm) and a second within LDL-III (24.2-25.5 nm). We also found that the increase in LDL accompanying higher triglyceride levels occurs below 25.5 nm in men and between 24.5 and 26.5 nm in women, suggesting either that triglycerides are related to different LDL subclasses in men and women, or that particle sizes of metabolically homologous LDL subclasses may differ in men and women. As compared to analytic ultracentrifuge measurements, gradient gel measurements of LDL absorbance by the procedure described here provide greater resolution of LDL subclasses but less precision in estimating LDL levels.

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      Published online: May 01, 1992

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      DOI: https://doi.org/10.1016/S0022-2275(20)41440-3

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