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Lanthanide-based time-resolved luminescence immunoassays
1Institute of Bioanalytical Chemistry, Center of Biotechnology and Biomedicine, Faculty of Chemistry and Mineralogy, Leipzig University, Germany.
Analytical and Bioanalytical Chemistry
|May 11, 2011
Summary
Lanthanide luminescence offers a powerful method to enhance immunoassay sensitivity and specificity. By utilizing long-lived luminescence, these assays overcome background noise for improved disease diagnosis and proteomics applications.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Biotechnology
Background:
- Immunoassays are crucial for detecting analytes like proteins in disease diagnosis.
- High background signals, especially from autofluorescence, limit immunoassay sensitivity and dynamic range.
- Conventional fluorophores in immunoassays are susceptible to short-lived background interferences.
Purpose of the Study:
- To review the potential of lanthanide luminescence for designing sensitive and specific immunoassays.
- To discuss techniques for labeling biomolecules with lanthanide chelate tags and chelate design.
- To compare microtitre plate-based heterogeneous and homogeneous assays and highlight surface-based imaging techniques.
Main Methods:
- Utilizing lanthanide chelate labels with long-lived luminescence properties.
- Employing time-gated acquisition to remove short-lived background interferences.
- Reviewing and comparing microtitre plate-based assays and surface-based imaging techniques.
Main Results:
- Lanthanide luminescence enables removal of background noise, increasing assay sensitivity and dynamic range.
- Time-gated acquisition effectively minimizes interferences from sample autofluorescence.
- Surface-based time-resolved imaging shows great potential for biomolecule detection in proteomics.
Conclusions:
- Lanthanide luminescence is a promising approach for developing highly sensitive and specific immunoassays.
- This technology significantly improves upon conventional methods by reducing background noise.
- Applications span disease diagnosis to advanced proteomics research using time-resolved imaging.
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