Rhabdovirus-based vectors with human immunodeficiency virus type 1 (HIV-1) envelopes display HIV-1-like tropism and target human dendritic cells

J Virol. 2002 Jan;76(1):19-31. doi: 10.1128/jvi.76.1.19-31.2002.

Abstract

We describe replication-competent, vaccine strain-based rabies viruses (RVs) that lack their own single glycoprotein and express, instead, a chimeric RV-human immunodeficiency virus type 1 (HIV-1) envelope protein composed of the ectodomain and transmembrane domains of HIV-1 gp160 and the cytoplasmic domain of RV G. The envelope proteins from both X4 (NL4-3)- and R5X4 (89.6)-tropic HIV-1 strains were utilized. These recombinant viruses very closely mimicked an HIV-1- like tropism, as indicated by blocking experiments. Infection was inhibited by SDF-1 on cells expressing CD4 and CXCR4 for both viruses, whereas RANTES abolished infection of cells expressing CCR5 in addition to CD4 in studies of the RV expressing HIV-1(89.6) Env. In addition, preincubation with soluble CD4 or monoclonal antibodies directed against HIV-1 gp160 blocked the infectivity of both G-deficient viruses but did not affect the G-containing RVs. Our results also indicated that the G-deficient viruses expressing HIV-1 envelope protein, in contrast to wild-type RV but similar to HIV-1, enter cells by a pH-independent pathway. As observed for HIV-1, the surrogate viruses were able to target human peripheral blood mononuclear cells, macrophages, and immature and mature human dendritic cells (DC). Moreover, G-containing RV-based vectors also infected mature human DC, indicating that infection of these cells is also supported by RV G. The ability of RV-based vectors to infect professional antigen-presenting cells efficiently further emphasizes the potential use of recombinant RVs as vaccines.

Publication types

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

MeSH terms

  • AIDS Vaccines
  • Antibodies, Monoclonal / pharmacology
  • CD4 Antigens / immunology
  • Cells, Cultured
  • Chemokines / immunology
  • Dendritic Cells / immunology
  • Dendritic Cells / virology*
  • Gene Targeting
  • Genetic Vectors
  • HIV Envelope Protein gp160 / genetics*
  • HIV-1 / genetics*
  • HIV-1 / physiology
  • Humans
  • Rabies virus / genetics*
  • Rabies virus / pathogenicity
  • Receptors, CXCR4 / metabolism
  • Virulence / immunology
  • Virus Replication

Substances

  • AIDS Vaccines
  • Antibodies, Monoclonal
  • CD4 Antigens
  • Chemokines
  • HIV Envelope Protein gp160
  • Receptors, CXCR4