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An optimized method for cell-based phage display panning

J M Watters1, P Telleman, R P Junghans

  • 1Department of Medicine, Harvard Medical School, New England Deaconess Hospital, Boston MA 02215, USA.

Immunotechnology : an International Journal of Immunological Engineering
|March 1, 1997
PubMed
Summary
This summary is machine-generated.

This study developed a cell-based phage display panning method for identifying specific phage fragments that bind to antigens on whole cells. This optimized technique effectively enriches target phage even with non-specific binders present.

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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.