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The development of fluorescence immunoassays.
1Department of Obstetrics and Gynaecology, King's College School of Medicine and Dentistry, Denmark Hill, London.
Progress in Clinical and Biological Research
|January 1, 1988
Summary
Fluorescence immunoassays offer a sensitive, stable, and safe alternative to radioactive markers. This technology enables high-sensitivity detection, potentially surpassing traditional methods and allowing for point-of-care testing.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Immunology
Background:
- Radioactive markers have been crucial for immunoassays.
- A growing trend favors fluorescence immunoassays (FIAs) as alternatives.
- Simpler nonseparation FIAs are suitable when extreme sensitivity isn't required.
Purpose of the Study:
- To explore the potential of fluorescence immunoassays as alternatives to radioactive methods.
- To highlight the advantages of lanthanide chelates in developing sensitive immunoassays.
- To discuss the future prospects of fluorescence immunoassays in clinical diagnostics.
Main Methods:
- Utilizing lanthanide chelates for high-sensitivity detection in immunoassays.
- Developing labeled conjugates with specific activity potentially exceeding radioisotopes.
- Applying fluorescence polarization techniques for nonseparation FIAs.
- Implementing two-site immunofluorometric assays for proteins and competitive binding assays for haptens.
Main Results:
- Lanthanide chelate-based assays demonstrate high sensitivity, potentially exceeding conventional IRMA.
- Labeled conjugates exhibit high specific activity and stability, with no significant deterioration after a year.
- The developed assays are safe, easily disposable, and suitable for various applications.
- Successful application in assays for proteins and haptens has been demonstrated.
Conclusions:
- Fluorescence immunoassays, particularly those using lanthanide chelates, offer a highly sensitive and stable alternative to radioactive immunoassays.
- The safety and stability of fluorescently labeled materials enhance their utility.
- Future advancements in fluorescent probes and instrumentation will enable point-of-care and home-based testing.