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Magnetophoretic mobilities correlate to antibody binding capacities.
K E McCloskey1, J J Chalmers, M Zborowski
1Department of Chemical Engineering, The Ohio State University, Columbus 43210, USA.
Cytometry
|August 5, 2000
Summary
Quantify cellular surface antigens using immunomagnetic labels and cell tracking velocimetry. This method establishes a calibration curve for accurate antigen measurement on cells.
Area of Science:
- Biotechnology
- Cell Biology
- Immunology
Background:
- Accurate quantitation of cellular surface antigens is crucial for understanding cell function and disease.
- Existing methods may have limitations in sensitivity or throughput.
Purpose of the Study:
- To develop and validate a novel methodology for quantifying cellular surface antigen expression levels.
- To establish a mathematical framework for relating immunomagnetic labeling to measurable biophysical properties.
Main Methods:
- Developed a methodology combining immunomagnetic labeling with cell tracking velocimetry (CTV).
- Utilized Quantum Simply Cellular (QSC) microbeads labeled with specific antibodies and paramagnetic nanoparticles.
- Defined and measured magnetophoretic mobility as a key parameter.
Main Results:
- Established a linear correlation between magnetophoretic mobility and antibody binding capacity (ABC) for microbeads with <30,000 ABC.
- Generated a QSC standardization curve for antigen quantitation.
- Demonstrated agreement between experimental results and theoretical predictions.
Conclusions:
- The developed methodology allows for accurate quantitation of cellular surface antigens.
- The QSC standardization curve and mathematical relationships enable determination of antigen numbers on cells.
- This technique offers a powerful tool for cell analysis and characterization.