Technical report: xMAPr - High-dynamic-range (HDR) quantification of antigen-specific antibody binding

Area of Science:

• Biochemistry
• Immunology
• Analytical Chemistry

Background:

• Accurate quantification of antibody-antigen interactions is crucial for various biological and diagnostic applications.
• Multiplexed suspension bead arrays offer high-throughput analysis but can be limited by dynamic range.
• Existing methods may struggle with quantifying a wide range of antigen concentrations or binding affinities.

Purpose of the Study:

• To develop and validate a method for high-dynamic-range quantification of antibody binding to single antigens.
• To improve the robustness and reliability of data generated from multiplexed suspension bead array assays.
• To increase the quantitative dynamic range of antibody-antigen binding measurements.

Main Methods:

• Implementation of a dilution-based approach for sample preparation.
• Development and application of a novel data analysis tool tailored for suspension bead array data.
• Validation of the method across selected sample types to assess performance.

Main Results:

• Demonstration of a high-dynamic-range quantification of antibody binding to single antigens.
• Achieved a three-orders-of-magnitude increase in the quantitative dynamic range using the new method.
• Observed a significant improvement in data robustness for downstream analyses.

Conclusions:

• The developed method successfully enhances the dynamic range for antibody-antigen quantification in multiplexed bead arrays.
• This advancement provides a more robust data foundation for various applications, including diagnostics and drug discovery.
• The novel data analysis tool is key to achieving the expanded quantitative range and improved data quality.