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Related Experiment Videos

Immunochemical methods for quantification of apolipoprotein A-IV

N H Fidge1

  • 1Lipoprotein-Atherosclerosis Unit, Baker Medical Research Institute, Melbourne, Victoria, Australia.

Methods in Enzymology
|January 1, 1996
PubMed
Summary

Choosing the right immunoassay for apolipoprotein A-IV (apoA-IV) depends on your needs. Radioimmunoassay or competitive ELISA are best for plasma or lipoprotein fractions, while sandwich ELISA offers higher sensitivity for very low apoA-IV levels.

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Area of Science:

  • Biochemistry
  • Immunology
  • Analytical Chemistry

Background:

  • Apolipoprotein A-IV (apoA-IV) plays a role in lipid metabolism.
  • Accurate measurement of apoA-IV levels is crucial for various research and clinical applications.
  • Several immunoassay techniques exist for quantifying apoA-IV.

Purpose of the Study:

  • To review and compare available immunoassay methods for apolipoprotein A-IV (apoA-IV) quantification.
  • To guide researchers in selecting the most appropriate method based on experimental requirements and sensitivity needs.

Main Methods:

  • Comparison of simple immunoelectrophoresis, radioimmunoassay (RIA), competitive enzyme-linked immunosorbent assay (ELISA), and sandwich ELISA.
  • Evaluation of methods based on sensitivity, rapidity, and ease of performance.

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  • Consideration of sample type (plasma, lipoproteins, cultured cells).

    • Main Results:

    • Simple immunoelectrophoresis is sufficient when high sensitivity is not required.
    • Radioimmunoassay and competitive ELISA are suitable for determining apoA-IV levels in plasma or lipoprotein fractions.
    • Competitive ELISA provides a balance of sensitivity, speed, and ease of use.
    • Sandwich ELISA is necessary for detecting very low apoA-IV concentrations, such as those from cultured cells.

    Conclusions:

    • The selection of an immunoassay for apoA-IV is dependent on the specific research question and required sensitivity.
    • Competitive ELISA offers a practical and sensitive option for routine measurements in plasma and lipoproteins.
    • Sandwich ELISA is the preferred method for ultra-sensitive detection of apoA-IV.