Related Experiment Videos
Application of enzyme immunoassays to coagulation testing
Clinical Chemistry
|September 1, 1984
Summary
Enzyme immunoassays detect low concentrations of plasma proteins and markers with high accuracy. These cost-effective methods, including sandwich and competitive assays, offer longer shelf-life than radioimmunoassays.
Area of Science:
- Biochemistry
- Clinical Chemistry
- Immunology
Background:
- Enzyme immunoassays (EIAs) are valuable for detecting low concentrations of coagulation proteins and pathological markers in plasma.
- Analytes in the ng/mL range can be measured with good reproducibility (intra- and interassay CVs < 5–10%).
Purpose of the Study:
- To highlight the utility of enzyme immunoassays for detecting various plasma analytes.
- To compare EIA methods with radioimmunoassays.
Main Methods:
- "Sandwich" EIAs are used for macromolecules like von Willebrand factor, Factor IX, protein C, and Factor X.
- Competitive EIAs are employed for low-molecular-mass peptides, such as fibrinopeptide A, to detect thrombosis.
Main Results:
- EIAs provide accurate detection of analytes in the ng/mL range.
- Competitive assays for fibrinopeptide A are useful for identifying in vivo thrombin generation, with normal levels below 3 ng/mL.
Conclusions:
- Enzyme immunoassays are versatile, reproducible, and cost-effective diagnostic tools.
- EIA reagents offer advantages over radioimmunoassays, including longer shelf-life and cost-effectiveness.