Combination of treatment with death receptor 5-specific antibody with therapeutic HPV DNA vaccination generates enhanced therapeutic anti-tumor effects

Vaccine. 2008 Aug 12;26(34):4314-9. doi: 10.1016/j.vaccine.2008.06.049. Epub 2008 Jul 1.

Abstract

There is currently a vital need for the development of novel therapeutic strategies for the control of advanced stage cancers. Antigen-specific immunotherapy and the employment of antibodies against the death receptor 5 (DR5) have emerged as two potentially promising strategies for cancer treatment. In the current study, we hypothesize that the combination of treatment with the anti-DR5 monoclonal antibody, MD5-1 with a DNA vaccine encoding calreticulin (CRT) linked to human papillomavirus type 16 (HPV-16) E7 antigen (CRT/E7(detox)) administered via gene gun would lead to further enhancement of E7-specific immune responses as well as anti-tumor effects. Our results indicated that mice bearing the E7-expressing tumor, TC-1 treated with MD5-1 monoclonal antibody followed by CRT/E7(detox) DNA vaccination generated the most potent therapeutic anti-tumor effects as well as highest levels of E7-specific CD8+ T cells among all the groups tested. In addition, treatment with MD5-1 monoclonal antibody was capable of rendering the TC-1 tumor cells more susceptible to lysis by E7-specific cytotoxic T lymphocytes. Our findings serve as an important foundation for future clinical translation.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Monoclonal / therapeutic use*
  • CD8-Positive T-Lymphocytes / immunology
  • Calreticulin / genetics
  • Calreticulin / immunology
  • Cell Line, Tumor
  • Female
  • Immunotherapy / methods*
  • Interferon-gamma / biosynthesis
  • Mice
  • Mice, Inbred C57BL
  • Neoplasms / therapy*
  • Oncogene Proteins, Viral / genetics
  • Oncogene Proteins, Viral / immunology
  • Papillomavirus E7 Proteins
  • Papillomavirus Vaccines / genetics
  • Papillomavirus Vaccines / immunology
  • Papillomavirus Vaccines / therapeutic use*
  • Receptors, TNF-Related Apoptosis-Inducing Ligand / antagonists & inhibitors*
  • Receptors, TNF-Related Apoptosis-Inducing Ligand / immunology
  • Spleen / immunology
  • Survival Analysis
  • Vaccines, DNA / genetics
  • Vaccines, DNA / immunology
  • Vaccines, DNA / therapeutic use*

Substances

  • Antibodies, Monoclonal
  • Calreticulin
  • Oncogene Proteins, Viral
  • Papillomavirus E7 Proteins
  • Papillomavirus Vaccines
  • Receptors, TNF-Related Apoptosis-Inducing Ligand
  • Vaccines, DNA
  • oncogene protein E7, Human papillomavirus type 16
  • Interferon-gamma