The efficacy of a DNA vaccine containing inserted and replicated regions of the E7 gene for treatment of HPV-16 induced tumors

Vaccine. 2007 Apr 30;25(17):3437-44. doi: 10.1016/j.vaccine.2006.12.045. Epub 2007 Jan 10.


A majority of cervical cancers are associated with Human Papillomavirus (HPV)-16. A DNA vaccine (E7IR) was designed for prophylactic and therapeutic treatment of HPV-16+ tumors containing two repeats of the E7 gene to inactivate transformation and duplicate available epitopes. Mice were vaccinated then tumor challenged, or challenged and then immunized and monitored for tumor volume and survival. Splenocytes were utilized for in vivo CTL assays. The E7IR vaccine demonstrated decreased tumor volume and enhanced survival in prophylactic and therapeutic experiments and improved CTL-mediated lysis. The E7IR vaccine shows promise in prevention of tumor formation and elimination of established tumors.

Publication types

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

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Female
  • Human papillomavirus 16 / immunology*
  • Mice
  • Mice, Inbred C57BL
  • Molecular Sequence Data
  • Oncogene Proteins, Viral / genetics
  • Oncogene Proteins, Viral / immunology*
  • Papillomavirus E7 Proteins
  • Papillomavirus Vaccines / immunology*
  • T-Lymphocytes, Cytotoxic / immunology
  • Uterine Cervical Neoplasms / prevention & control*
  • Vaccination
  • Vaccines, DNA / immunology*


  • Oncogene Proteins, Viral
  • Papillomavirus E7 Proteins
  • Papillomavirus Vaccines
  • Vaccines, DNA
  • oncogene protein E7, Human papillomavirus type 16