Protection of chimpanzees from high-dose heterologous HIV-1 challenge by DNA vaccination

Nat Med. 1997 May;3(5):526-32. doi: 10.1038/nm0597-526.


Novel approaches for the generation of more effective vaccines for HIV-1 are of significant importance. In this report we analyze the immunogenicity and efficacy of an HIV-1 DNA vaccine encoding env, rev and gag/pol in a chimpanzee model system. The immunized animals developed specific cellular and humoral immune responses. Animals were challenged with a heterologous chimpanzee titered stock of HIV-1 SF2 virus and followed for 48 weeks after challenge. Polymerase chain reaction coupled with reverse transcription (RT-PCR) results indicated infection in the control animal, whereas those animals vaccinated with the DNA constructs were protected from the establishment of infection. These studies serve as an important benchmark for the use of DNA vaccine technology for the production of protective immune responses.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • AIDS Vaccines / therapeutic use*
  • Animals
  • CD28 Antigens / blood
  • DNA, Viral / analysis
  • Female
  • HIV Antibodies / blood
  • HIV Infections / immunology
  • HIV Infections / prevention & control*
  • HIV-1 / immunology*
  • Leukocytes, Mononuclear / immunology
  • Lymph Nodes / virology
  • Male
  • Neutralization Tests
  • Pan troglodytes
  • T-Lymphocytes, Cytotoxic / immunology
  • Vaccination
  • Vaccines, DNA / therapeutic use*
  • Viral Load


  • AIDS Vaccines
  • CD28 Antigens
  • DNA, Viral
  • HIV Antibodies
  • Vaccines, DNA