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Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Published on: April 1, 2017

Multiplexed protein profiling by sequential affinity capture.

Burcu Ayoglu¹, Elin Birgersson¹, Anja Mezger²

¹Affinity Proteomics, SciLifeLab, School of Biotechnology, KTH - Royal Institute of Technology, Solna, Sweden.

|March 4, 2016

Summary

This summary is machine-generated.

A new bead-based antibody microarray assay improves protein detection in clinical samples. This dual-capture method enhances selectivity and sensitivity, reducing off-target binding for more reliable biomarker analysis.

Keywords:

Affinity proteomics Antibody arrays Plasma profiling Suspension bead arrays

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Area of Science:

Biotechnology
Proteomics
Assay Development

Background:

Antibody microarrays offer miniaturized analysis of clinical samples for proteomic insights.
Direct labeling and single antibody assays face challenges with off-target binding in complex sample matrices.

Purpose of the Study:

To develop a multiplexed, semi-automated sequential capture assay for improved protein profiling.
To enhance selectivity and sensitivity in antibody array-based assays.

Main Methods:

A novel bead-based assay involving sequential antigen capture, magnetic particle labeling, and combinatorial elution.
Read-out utilizing a secondary capture bead array for multiplexed detection.
Comparison with single-binder and sandwich assays, including exploration of DNA-based signal amplification.

Main Results:

The dual sequential affinity interaction assay significantly reduced off-target binding compared to single-binder assays.
Lowered background and noise levels were observed, leading to improved correlation with clinical values.
Sensitivity was comparable to or exceeded traditional methods, demonstrating applicability for biomarker analysis.

Conclusions:

The developed multiplexed, dual capture bead-based antibody microarray enhances the utility of antibody arrays for protein profiling in biological fluids.
This approach offers improved accuracy and reliability for biomarker discovery and diagnostics.