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Related Experiment Videos

A rapid method for lecithin:cholesterol acyltransferase estimation in human serum

L G Alcindor, A Dusser, M C Piot

    Scandinavian Journal of Clinical and Laboratory Investigation. Supplementum
    |January 1, 1978
    PubMed
    Summary

    A new, sensitive lecithin:cholesterol acyltransferase (LCAT) assay was developed. This method offers improved accuracy for determining LCAT activity in plasma, overcoming limitations of existing techniques.

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    Area of Science:

    • Biochemistry
    • Clinical Chemistry

    Background:

    • Existing lecithin:cholesterol acyltransferase (LCAT) assays lack sensitivity and accuracy.
    • Colorimetric and radioassay methods have limitations such as incomplete isotopic equilibrium.
    • Gas-liquid chromatography is unsuitable for low LCAT activity measurements.

    Purpose of the Study:

    • To develop a novel, sensitive, and accurate method for determining plasma LCAT activity.
    • To overcome the limitations of current LCAT determination procedures.

    Main Methods:

    • Plasma delipoproteinization via coprecipitation with Intralipid, dextran sulphate, and calcium chloride.
    • Assay of cholesterol esterification using a short incubation (30 min) with 3H-cholesterol-labelled substrate.
    • Measurement of esterified cholesterol in delipoproteinized plasma.

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    Main Results:

    • The new method demonstrates high sensitivity and accuracy for LCAT determination.
    • Approximately 15% of cholesterol is esterified within 30 minutes (35 +/- 7 micromole/h/l).
    • The LCAT reaction linearity is maintained for approximately one hour.

    Conclusions:

    • The developed method provides a more reliable approach for assessing LCAT activity.
    • This assay is suitable for clinical and research settings requiring precise LCAT measurements.
    • The improved sensitivity addresses critical limitations of prior LCAT determination techniques.