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Related Experiment Videos

Estimation of solid phase affinity constants using resistive-pulses from functionalized nanoparticles.

Jeffrey D Uram1, Michael Mayer

  • 1Department of Biomedical Engineering University of Michigan, Ann Arbor, MI 48109, USA.

Biosensors & Bioelectronics
|August 8, 2006
PubMed
Summary
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Researchers estimated antibody affinity using nanoparticle sizing data. This method quantics the binding of antibodies to antigens, providing a reliable measurement for antibody-antigen interactions.

Area of Science:

  • Biophysical Chemistry
  • Nanotechnology
  • Immunology

Background:

  • Antibody-antigen interactions are crucial in biological systems and diagnostics.
  • Quantifying antibody affinity is essential for understanding these interactions.
  • Existing methods for affinity measurement can be complex or require specialized equipment.

Purpose of the Study:

  • To develop a novel method for estimating the solid phase affinity constant of antibodies.
  • To utilize resistive-pulse sensing data for quantifying antibody-antigen binding.
  • To validate the method by comparing results with known antibody specifications.

Main Methods:

  • Analysis of resistive-pulse (Coulter counting) data from antigen-functionalized nanoparticles.
  • Determination of bound antibody numbers at varying antibody concentrations.

Related Experiment Videos

  • Fitting binding data with isotherms to calculate the solid phase affinity constant.

    • Main Results:

    • Successfully determined the number of antibodies bound to nanoparticles.
    • Estimated the solid phase affinity constant for monoclonal anti-streptavidin antibodies.
    • Calculated affinity constant of 2.6x10^8 +/- 0.8x10^8 M^-1, aligning with supplier data.

    Conclusions:

    • Resistive-pulse sensing provides a viable method for estimating antibody affinity constants.
    • The technique offers a quantitative approach to studying antibody-antigen binding equilibrium.
    • This method can be applied to various antibody-antigen systems for affinity characterization.