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Updated: Mar 29, 2026

Screening and Identification of Small Peptides Targeting Fibroblast Growth Factor Receptor2 using a Phage Display Peptide Library
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Lambda Phage-Based Antibody-Stimulating Platform Targeting EGFRvIII.

Meredith Bush1, Manoj Rajaure1, Calla Gentilucci1,2

  • 1Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.

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Summary
This summary is machine-generated.

This study developed a modified lambda bacteriophage display platform to stimulate specific antibodies against cancer-related EGFRvIII. The platform successfully generated a targeted immune response in mice, showing potential for cancer immunotherapy and vaccine development.

Keywords:
EGFRvIIIantibodycancerimmunogenicityimmunotherapylambdapeptidephage displayvector

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Area of Science:

  • Bacteriophage display technology
  • Immunology
  • Molecular biology

Background:

  • Bacteriophage display is a versatile tool for protein library construction and biopanning.
  • A modified lambda (λ) bacteriophage platform was engineered for efficient protein display and delivery.
  • The platform incorporates counter-selection recombineering, temperature-sensitive induction, and arabinose-inducible expression for enhanced functionality.

Purpose of the Study:

  • To investigate the immunogenicity of a specialized λ phage display platform.
  • To assess the platform's ability to stimulate specific antibodies against the cancer-variant EGFRvIII receptor.
  • To demonstrate the potential of this platform in cancer immunotherapy and vaccine development.

Main Methods:

  • Fusion proteins of λ head protein D and an EGFRvIII peptide were constructed.
  • Recombinant phage lysates displaying ~420 fusion proteins per particle were generated.
  • Mice were immunized with purified recombinant λ phage, and serum antibody responses were analyzed via ELISA and Western blotting.

Main Results:

  • The λD~EGFRvIII phage display platform successfully elicited a robust humoral response against EGFRvIII.
  • Both N-terminal and C-terminal fusion strategies induced anti-EGFRvIII antibodies.
  • The antibody response demonstrated high specificity for EGFRvIII, with no cross-reactivity to wild-type EGFR.

Conclusions:

  • The developed λ phage display system serves as a high-titer, stable vector for stimulating specific antibody responses.
  • The platform acts as a self-adjuvanting system, simplifying vaccine formulation.
  • This technology holds significant promise for cancer immunotherapy and broader vaccine applications.