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Flow injection immunoassay using a protein A immunoreactor.

J N Miller1, D A Palmer, M T French

  • 1Department of Chemistry, Loughborough University, Leicestershire, UK.

Journal of Pharmaceutical and Biomedical Analysis
|January 1, 1991
PubMed
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This study presents novel competitive immunoassays for cyclosporin A and theophylline. These assays utilize identical microcolumns and flow injection, demonstrating adaptable analytical methods for drug monitoring.

Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Immunology

Background:

  • Cyclosporin A is a vital immunosuppressant, and theophylline is a key anti-asthmatic drug.
  • Accurate quantification of these drugs is crucial for therapeutic drug monitoring.
  • Existing immunoassay methods may require optimization for speed and efficiency.

Purpose of the Study:

  • To develop and validate competitive immunoassays for cyclosporin A and theophylline.
  • To utilize a unified microcolumn and flow injection system for both assays.
  • To compare different detection methods within this framework.

Main Methods:

  • Development of competitive immunoassays using controlled pore glass-protein A microcolumns.
  • Application of flow injection analysis (FIA) techniques for rapid sample processing.

Related Experiment Videos

  • Utilizing a monoclonal antibody with fluorescence detection for cyclosporin A.
  • Employing sheep antiserum with electrochemical detection for theophylline.

    • Main Results:

    • Successful development of competitive immunoassays for both cyclosporin A and theophylline.
    • Demonstration of the adaptability of the controlled pore glass-protein A microcolumn system.
    • Validation of fluorescence and electrochemical detection methods for their respective analytes.
    • The flow injection technique enabled efficient and rapid analysis.

    Conclusions:

    • The developed competitive immunoassays are effective for quantifying cyclosporin A and theophylline.
    • The identical microcolumn and flow injection system offers a versatile platform for immunoassay development.
    • This approach provides a robust method for therapeutic drug monitoring of these important medications.