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Related Experiment Videos

Detection of digitalis compounds using a surface plasmon resonance-based biosensor

L Laricchia-Robbio1, S Balzan, S Ghione

  • 1Institute of Mutagenesis and Differentiation, CNR, Pisa, Italy.

Biosensors & Bioelectronics
|December 8, 1998
PubMed
Summary

This study introduces an automated biosensor for detecting digitalis-like factors (EDLF) in real-time. This technology offers advantages over traditional methods for analyzing biomolecular interactions in human fluids.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Cardiovascular Research

Background:

  • Endogenous and exogenous digitalis-like factors (EDLF) are implicated in hypertension and perinatal adaptation.
  • Accurate detection of EDLF is crucial for understanding these physiological processes.
  • Traditional immunoassays like radioimmunoassay (RIA) have limitations in speed and automation for digitalis compound detection.

Purpose of the Study:

  • To develop and evaluate an automated surface plasmon resonance (SPR) biosensor system for real-time detection of EDLF.
  • To assess the specificity and affinity of polyclonal anti-ouabain antibodies for digitalis compounds.
  • To compare the performance of the SPR biosensor with traditional immunoassay methods.

Main Methods:

  • Purification of EDLF from umbilical cord blood.

Related Experiment Videos

  • Utilizing an automated SPR-based biosensor system for real-time analysis.
  • Employing highly specific polyclonal anti-ouabain antibodies to quantify EDLF in plasma.

    • Main Results:

    • The SPR biosensor successfully detected EDLF in the picomolar range in real time.
    • Anti-ouabain antibodies demonstrated high affinity for ouabain, ouabagenin, and strophantidin (IC50 values provided).
    • EDLF cross-reacted with antibodies, with plasma concentrations around 50 pmol ouabain equivalent at IC50.

    Conclusions:

    • The automated SPR biosensor system shows significant potential for biomolecular interaction analysis.
    • This technology offers advantages over RIA, including automation, real-time measurement, and sharper response.
    • The biosensor is a valuable tool for detecting digitalis compounds in human fluids, aiding research in hypertension and perinatal adaptation.