Arteriosclerosis and Thrombosis, Vol 11, 64-70, Copyright © 1991 by American Heart Association

ARTICLES

Cholesterol esterification rates in very low density lipoprotein- and low density lipoprotein-depleted plasma. Relation to high density lipoprotein subspecies, sex, hyperlipidemia, and coronary artery disease

M Dobiasova, J Stribrna, DL Sparks, PH Pritchard and JJ Frohlich
Institute of Nuclear Biology and Radiochemistry, Czechoslovak Academy of Sciences, Prague.

The fractional rate of cholesterol esterification in very low density lipoprotein- and low density lipoprotein-depleted plasma (FERHDL) was studied in normolipidemic subjects and in individuals with hyperlipidemia and proven coronary artery disease (CAD). The FERHDL was significantly higher than the FER in whole plasma and was significantly higher in normal men than in normal women. In addition, men and women with primary hyperlipidemia had significantly higher FERHDL values relative to their sex-matched controls. The most significant increases in FERHDL values, however, were observed in individuals with CAD. In all patient groups, FERHDL was positively correlated with plasma triglyceride concentration. In addition, FERHDL was negatively related to plasma high density lipoprotein (HDL) cholesterol concentration in all groups except in men with CAD and in normolipidemic women. The gradient gel electrophoretic pattern of HDL from individuals with either low or high FERHDL values indicated an inverse relation between this activity and the relative amount of HDL2b particles. FERHDL likely reflects the metabolic properties of the heterogeneous population of HDL particles in the plasma and may be a function of the relative content of larger and smaller HDL particles. It appears to be a sensitive and reliable functional measure of the particle size distribution in the HDL pool and one of potential clinical value in the assessment of risk for CAD.

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