Multiplexed flow cytometry: high-throughput screening of single-chain antibodies

Area of Science:

• Biotechnology
• Immunology
• Proteomics

Background:

• High-throughput screening (HTS) is crucial for characterizing recombinant antibodies and affinity reagents from large libraries.
• Current HTS methods like ELISA have limitations in analyzing multiple targets or antibody clones simultaneously.
• Proteomic studies require efficient selection of ligands against numerous gene products in a parallel manner.

Purpose of the Study:

• To develop a multiplexed flow cytometry screening method for analyzing individual binding ligands against numerous targets concurrently.
• To overcome the limitations of existing HTS techniques in parallel screening applications.
• To improve the efficiency and reduce resource consumption in affinity reagent generation.

Main Methods:

• Development of a multiplexed flow cytometry assay.
• Simultaneous determination of relative expression levels, non-specific binding, and fine specificities for each antibody clone.
• Analysis of individual binding ligands against numerous targets within a single analytical sample.

Main Results:

• The multiplexed flow cytometry method provides a complex analytical profile for each antibody clone.
• Achieved simultaneous analysis of antibody clones against numerous targets, surpassing ELISA capabilities.
• Demonstrated significant reductions in analysis time and antigen consumption.
• Enabled fine specificity discrimination and identification of non-specific binding.

Conclusions:

• Multiplexed flow cytometry offers a powerful advancement for HTS of affinity reagents.
• This method significantly reduces bottlenecks in generating affinity reagents for proteomic-scale research.
• The approach redefines parameters for initial identification of reagents from combinatorial libraries, enhancing efficiency and data quality.