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The Immunogenicity and Anti-Tumor Efficacy of a Rationally Designed EGFR Vaccine

Chao Cheng1, Li Deng2, Rongxiu Li1

  • 1State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China.

Cellular Physiology and Biochemistry : International Journal of Experimental Cellular Physiology, Biochemistry, and Pharmacology
|March 23, 2018
PubMed
Abstract

Insights

A novel multiepitope immunogen, DEGFRm, shows promise as a vaccine for EGFR+ cancers. This vaccine elicits immune responses and inhibits tumor growth in preclinical models, offering a potential new therapeutic strategy.

Area of Science:

  • Oncology
  • Immunology
  • Vaccine Development

Background:

  • Abnormally activated Epidermal Growth Factor Receptor (EGFR) drives tumor progression, invasion, and metastasis.
  • Current EGFR-targeted therapies offer clinical benefits but face limitations including transient efficacy, frequent dosing, high costs, and toxicity.

Purpose of the Study:

  • To design and evaluate a novel multiepitope immunogen (DEGFRm) for active immunization against EGFR.
  • To assess the immunogenicity and anti-tumor efficacy of the DEGFRm vaccine in preclinical cancer models.

Main Methods:

  • A multiepitope immunogen, DEGFRm, was engineered by combining an epitope peptide (EGFR265-283) and the extracellular domain III (EGFR334-505) of mouse EGFR, fused to the diphtheria toxin translocation domain (DTT).
  • The immunogenicity and anti-tumor effects of the DEGFRm vaccine were investigated in mouse tumor models, formulated with Alum and CpG adjuvants.

Main Results:

  • The DEGFRm vaccine induced Th1 immune responses.
  • Significant inhibition of tumor growth was observed in both prophylactic and therapeutic settings in mouse models.
  • The vaccine treatment led to reduced tumor microvasculature and enhanced infiltration of CD8+ T lymphocytes into tumors.

Conclusions:

  • Active immunization with the DEGFRm vaccine represents a promising therapeutic strategy for various EGFR-positive cancers.
  • The vaccine's ability to elicit immune responses and inhibit tumor growth warrants further investigation for clinical application.
Keywords:
Cancer vaccineCpGDiphtheria toxin T-domainEGFR

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