Cholesterol determination in high-density lipoproteins separated by three different methods.

Area of Science:

• Clinical Chemistry
• Biochemistry

Background:

• Accurate measurement of high-density lipoprotein cholesterol (HDL-C) is crucial for cardiovascular risk assessment.
• Existing precipitation methods for HDL-C determination can be complex or less suitable for routine laboratory use.

Purpose of the Study:

• To develop and validate a simplified, cost-effective method for quantifying HDL-C in serum.
• To compare the accuracy and precision of the new method against established techniques.

Main Methods:

• A novel precipitation technique using sodium phosphotungstate and Mg2+ to selectively remove very-low- and low-density lipoproteins from serum.
• Comparison of HDL-C values obtained with the new method against those from heparin-Mn2+ precipitation and ultracentrifugal separation.

Main Results:

• The simplified precipitation method demonstrated strong correlation with heparin-Mn2+ precipitation (r = 0.95) and ultracentrifugation (r = 0.82).
• High precision was observed, with coefficients of variation (CV) below 10% for the majority of subjects studied.
• The method proved more appropriate for routine clinical laboratory application.

Conclusions:

• The described simplified precipitation method offers a reliable and efficient approach for routine HDL-C measurement.
• This technique provides an accessible alternative for clinical laboratories seeking accurate lipid profiling.