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Standardization of Lp(a) measurements
1Institute of Medical Biochemistry, University of Graz, Austria. gerhard.kostner@kfunigraz.ac.at
Clinical Genetics
|March 31, 1998
Summary
Standardizing lipoprotein(a) (Lp(a)) immunoassays is crucial for clinical chemistry. A global working group developed a reference method and material to ensure comparable Lp(a) test results across laboratories.
Area of Science:
- Clinical Chemistry
- Biochemistry
- Immunoassay Standardization
Background:
- Lipoprotein(a) (Lp(a)) immunoassay standardization is a significant challenge for clinical chemists.
- Lack of standardized methods hinders comparable clinical and epidemiological studies.
- International collaboration is essential for establishing reliable reference materials.
Purpose of the Study:
- To establish an internationally acknowledged reference material for Lp(a).
- To develop a standardized reference method for Lp(a) quantification.
- To harmonize commercially available Lp(a) assay kits.
Main Methods:
- A global working group involving 34 companies tested eight proposed reference materials.
- A reference method using dissociation-enhanced lanthanide fluorescence immunoassay was developed.
- Primary reference standards were prepared and their amino acid composition analyzed for molar concentration calculation.
Main Results:
- Two proposed reference materials were selected for value assignment.
- The developed reference method demonstrated linear and parallel response curves across various sample types.
- A method for calculating molar concentration based on amino acid composition was established.
Conclusions:
- The study established a foundation for comparable Lp(a) results in clinical laboratories and epidemiological research.
- The developed reference material and method aim to improve long-term precision in Lp(a) testing.
- Harmonization of commercial Lp(a) kits is the next critical step towards standardized clinical practice.