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Related Experiment Videos

Lipoprotein fractionation by a precipitation method. A simple quantitative procedure.

I C Onongbu, B Lewis

    Clinica Chimica Acta; International Journal of Clinical Chemistry
    |September 20, 1976
    PubMed
    Summary

    This study presents a new method for quantifying serum lipoproteins, including very low-density lipoprotein (VLDL), high-density lipoprotein (HDL), and low-density lipoprotein (LDL). The precipitation technique offers accurate lipid measurements from small serum volumes, even in cord blood.

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    Area of Science:

    • Clinical Chemistry
    • Biochemistry
    • Lipid Metabolism

    Background:

    • Accurate quantification of serum lipoproteins is crucial for assessing cardiovascular disease risk.
    • Existing methods like ultracentrifugation can be time-consuming and require large sample volumes.
    • A need exists for a simpler, more sensitive method for routine lipoprotein analysis.

    Purpose of the Study:

    • To develop and validate a novel precipitation-based method for quantifying the three major serum lipoprotein classes: VLDL, LDL, and HDL.
    • To assess the method's sensitivity for analyzing small serum volumes, including umbilical cord serum.
    • To compare the results of the precipitation method with those obtained by preparative ultracentrifugation.

    Main Methods:

    • Serum lipoproteins were separated using selective precipitation with sodium dodecyl sulphate.

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  • Cholesterol and triglyceride content in VLDL was directly measured after precipitation.
  • HDL lipids were measured in a separate aliquot after VLDL and LDL precipitation; LDL values were calculated by difference.

    • Main Results:

    • The method accurately quantifies cholesterol and triglyceride content in VLDL, HDL, and LDL fractions.
    • The procedure requires only 2 ml of serum, demonstrating high sensitivity suitable for neonatal samples.
    • Results from the precipitation method showed close agreement with established preparative ultracentrifugation techniques.

    Conclusions:

    • This precipitation method provides a reliable and sensitive approach for quantifying major serum lipoprotein classes.
    • The technique's low sample volume requirement makes it suitable for clinical settings and specialized analyses, such as neonatal screening.
    • The method's concordance with ultracentrifugation validates its utility for routine lipoprotein analysis.