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Related Experiment Videos

Requirements for screening recombinant DNA libraries for T cell epitope expression.

M Guttinger1, U Certa, J R Pink

  • 1Central Research Units, F. Hoffmann-La Roche & Co. Ltd., Basel, Switzerland.

Journal of Immunological Methods
|July 26, 1989
PubMed
Summary

Researchers explored screening cDNA expression libraries using T cell clones. They optimized membrane pretreatment and found T cell proliferation comparable to solution-based assays, enabling large-scale screening for malaria antigens.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Biotechnology

Background:

  • Screening cDNA expression libraries is crucial for identifying novel antigens.
  • T cell clones offer specific antigen recognition for library screening.
  • Developing efficient screening methods is essential for immunological research.

Purpose of the Study:

  • To investigate the feasibility of using T cell clones for screening cDNA expression libraries.
  • To optimize conditions for antigen binding and T cell proliferation assays.
  • To develop a method for large-scale screening of expression libraries.

Main Methods:

  • Utilized human T cell clones specific for the malaria protein 190L.
  • Expressed 190L fused to beta-galactosidase in lambda gt11.

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  • Tested various membranes and pretreatment methods (DMSO, sonication) for antigen release and binding.
  • Assessed T cell proliferation in response to membrane-bound and solution-phase antigens.
  • Designed a dot-blot apparatus for high-throughput screening.

    • Main Results:

    • Membrane pretreatment with DMSO and/or sonication enhanced assay sensitivity.
    • Optimal conditions allowed T cell proliferation comparable to solution-based assays.
    • A low protein binder membrane facilitated antigen binding and T cell stimulation.
    • A dot-blot apparatus was developed for screening numerous plaques.

    Conclusions:

    • Screening cDNA expression libraries with T cell clones is a viable approach.
    • Optimized pretreatment and membrane selection improve assay performance.
    • This method facilitates large-scale identification of antigens recognized by T cells, with applications in malaria research.