Radioimmunoassay for human plasma apolipoprotein B

Area of Science:

• Biochemistry
• Immunology
• Clinical Chemistry

Background:

• Apolipoprotein B is a key component of beta-lipoproteins.
• Accurate measurement of apolipoprotein B is crucial for cardiovascular health assessment.

Purpose of the Study:

• To develop a simplified double antibody radioimmunoassay for human apolipoprotein B.
• To establish a reliable method for quantifying apolipoprotein B levels.

Main Methods:

• Purification of human apolipoprotein B using gel filtration and ultracentrifugation.
• Radiolabeling of the purified antigen with iodine monochloride.
• Validation of the radioimmunoassay's sensitivity and working range.

Main Results:

• The assay demonstrated a lower limit of sensitivity of 15 ng protein and a working range of 15-200 ng.
• The mean apolipoprotein B level in 128 healthy subjects was 86.6 +/- 29.6 mg/100ml.
• Results are consistent with previously published data using unmodified assays.

Conclusions:

• The developed radioimmunoassay is a simplified and effective method for measuring human apolipoprotein B.
• The assay provides reliable quantification of apolipoprotein B, supporting its use in clinical settings.
• This method contributes to the accurate assessment of cardiovascular risk factors.