An optimized method for cell-based phage display panning

Area of Science:

• Biotechnology
• Molecular Biology
• Immunology

Background:

• Traditional phage display panning relies on purified antigens immobilized on solid phases.
• This approach is unsuitable for cell surface antigens or unknown targets.
• Limitations hinder the application of phage display in native biological environments.

Purpose of the Study:

• To establish a novel model antigen system utilizing whole cells instead of purified proteins.
• To optimize phage display panning methodologies for a cell-based approach.
• To enhance the selection of specific phage fragments binding to cellular targets.

Main Methods:

• Development of a cell-based panning system for phage display.
• Optimization of incubation times, washing steps, and temperature parameters.
• Utilized output titer and flow cytometry to assess binding specificity.

Main Results:

• Demonstrated specific binding of phage fragments to antigens on whole cells.
• Achieved significant enrichment of specific phage fragments after multiple panning rounds.
• Identified optimal conditions including longer incubation times for improved binding.

Conclusions:

• The optimized cell-based phage display panning method effectively enriches specific phage fragments.
• This technique is viable for selecting phage binders against antigens in their native cellular context.
• The method overcomes limitations of traditional panning for cell surface targets.