ArticleVaccines2026
Lambda Phage-Based Antibody-Stimulating Platform Targeting EGFRvIII.
Article in Vaccines, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
BACKGROUND/
objectivesBacteriophage-based display has been utilized for a variety of purposes, such as to assemble protein libraries and conduct biopanning. We have created a modified lambda (λ) bacteriophage platform, ideal for the display and delivery of proteins. Our system utilizes counter-selection recombineering for versatile modification, temperature-sensitive induction for timely lysate production, and an arabinose-inducible mechanism for high-titer, stable yield. Here, we investigated the ability of this specialized λ phage display platform to stimulate highly specific antibodies in mice against the displayed cancer-variant cell-surface receptor EGFRvIII, demonstrating its potential in cancer immunotherapy and broader vaccine development.
methodsλ display immunogenicity was explored by generating fusion proteins between the λ head protein D and a 13-mer peptide from the N terminus of glioblastoma variant cell-surface receptor, EGFRvIII. The 13-mer peptide was fused to either the N or C terminus of the λD protein while λ remained a dormant lysogen in the bacterial host chromosome. Recombinant phage lysates were then generated with ~420 displayed fusion proteins per phage particle. Mice were injected with purified recombinant λ phage without an adjuvant via both intraperitoneal and intramuscular routes, and sera harvested at various timepoints were profiled for immunogenicity.
resultsAnalysis of serum samples by ELISA and Western blotting demonstrated the ability of the λD~EGFRvIII phage display, especially in the C-terminal fusion construction, to elicit a robust anti-EGFRvIII humoral response by either injection route. Notably, the antibody response was highly specific to EGFRvIII without exhibiting cross-reactivity to wild-type EGFR.
conclusionsThe data generated in this study demonstrate the λ system's immunotherapeutic potential as a high-titer, stable, self-adjuvanting vector for the stimulation of robust antibody titers with defined specificity.
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