HIV-1 prophylactic vaccine comprised of topical DermaVir prime and protein boost elicits cellular immune responses and controls pathogenic R5 SHIV162P3

Virology. 2007 Sep 15;366(1):197-211. doi: 10.1016/j.virol.2007.04.012. Epub 2007 May 11.

Abstract

Topical DNA vaccination (DermaVir) facilitates antigen presentation to naive T cells. DermaVir immunization in mice, using HIV-1 Env and Gag, elicited cellular immune responses. Boosting with HIV-1 gp120 Env and p41 Gag augmented Th1 cytokine levels. Intramuscular DNA administration was less efficient in priming antigen-specific cytokine production and memory T cells. In rhesus macaques, DermaVir immunization induced Gag- and Env-specific Th1 and Th2 cytokines and generation of memory T cells. Boosting of DermaVir-primed serum antibody levels was noted following gp140(SHIV89.6P)/p27(SIV) immunization. Rectal challenge with pathogenic R5-tropic SHIV162P3 resulted in control of plasma viremia (4/5 animals) that was reflected in jejunum, colon and mesenteric lymph nodes. An inverse correlation was found between Gag- and Env-specific central memory T cell responses on the day of challenge and plasma viremia at set point. Overall, the topical DermaVir/protein vaccination yields central memory T cell responses and facilitates control of pathogenic SHIV infection.

MeSH terms

  • AIDS Vaccines / immunology*
  • AIDS Vaccines / therapeutic use
  • Acquired Immunodeficiency Syndrome / immunology*
  • Animals
  • Codon
  • Cytokines / analysis
  • Cytokines / immunology
  • Disease Models, Animal
  • Flow Cytometry
  • Genes, env
  • HIV Envelope Protein gp120 / immunology
  • HIV-1 / immunology*
  • HIV-1 / pathogenicity
  • Immunization, Secondary
  • Macaca mulatta
  • Mice
  • Simian Immunodeficiency Virus / immunology
  • T-Lymphocytes, Cytotoxic / immunology
  • Th1 Cells / immunology
  • Th2 Cells / microbiology

Substances

  • AIDS Vaccines
  • Codon
  • Cytokines
  • DermaVir
  • HIV Envelope Protein gp120