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DC targeting DNA vaccines induce protective and therapeutic antitumor immunity in mice

Qun Wang1, Wei Cao1, Zhi-Gang Yang1

  • 1Department of Surgical Oncology, Shanghai Shidong Hospital Shanghai, China.

International Journal of Clinical and Experimental Medicine
|January 16, 2016
PubMed
Abstract

Insights

This study developed a novel DNA vaccine targeting dendritic cells (DCs) to combat breast cancer. The scFv(N418)-HER2 conjugate showed significant antitumoral efficacy in mouse models, offering a promising strategy for long-lasting antitumor immunity.

Area of Science:

  • Immunology
  • Oncology
  • Biotechnology

Background:

  • Anti-CD11c antibodies target CD11c receptors on dendritic cells (DCs) for antigen presentation.
  • Developing DC-targeting DNA vaccines can enhance immunization strategies.
  • Tumor-associated antigen HER2/neu ectodomain was fused with scFv(N418) for DC targeting.

Purpose of the Study:

  • To explore the antitumoral efficacy of DC-targeting DNA vaccines.
  • To investigate the underlying mechanisms of these vaccines in mouse breast cancer models.
  • To evaluate the potential for inducing long-lasting antitumor immunity.

Main Methods:

  • Constructed scFv(N418)-HER2 DNA vaccines.
  • Tested vaccine efficacy in transplantable HER2/neu-expressing murine tumor models.
  • Assessed humoral and cellular immune responses and antitumoral activity.

Main Results:

  • scFv(N418)-HER2 immunization protected against tumor growth in mice.
  • Conjugate injection slowed tumor growth in existing tumors.
  • Combination therapy with low-dose cyclophosphamide eradicated tumors and retarded spontaneous mammary carcinomas.

Conclusions:

  • DC-targeting DNA vaccines via antibody-antigen conjugates offer a novel approach.
  • This strategy can induce long-lasting antitumor immunity.
  • Potential clinical applications for breast cancer treatment.
Keywords:
DNA vaccineHER2/neubreast cancercyclophosphamidedendritic cell-targeted

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