A new colorimetric method for the determination of plasma lecithin-cholesterol acyltransferase activity

A new method has been developed to improve the linearity of the plasma lecithin-cholesterol acyltransferase reaction by adding synthetic dipalmitoyl lecithin sol to the incubation medium and subsequently measuring the change in free cholesterol content after incubation by a combined enzymatic method using cholesterol oxidase and peroxidase. The method was found to be simpler than other techniques such as gas-liquid chromatography or isotope methods and therefore may be suitable for the routine assays of plasma lecithin-cholesterol acyltransferase activities in clinical laboratories.