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Lentivirus vectors using human and simian immunodeficiency virus elements.

S M White1, M Renda, N Y Nam

  • 1Departments of Medicine, University of Rochester Cancer Center, Rochester, New York 14642, USA.

Journal of Virology
|March 12, 1999
PubMed
Summary
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A novel lentivirus vector combines HIV, SIV, and VSV for enhanced gene therapy safety. This HIV/SIVpack/G system minimizes recombination risks, offering a safer alternative for gene delivery in various human and mouse cells.

Area of Science:

  • Gene Therapy
  • Viral Vector Development
  • Molecular Biology

Background:

  • Lentivirus vectors, derived from human immunodeficiency virus (HIV) type 1, are advanced tools in gene therapy.
  • A significant advantage of HIV-1 vectors is their capacity to infect non-dividing cells.
  • Existing HIV-1 vectors raise safety concerns due to potential recombination, possibly creating replication-competent, pathogenic viruses.

Purpose of the Study:

  • To develop a novel lentivirus vector with improved safety features for gene therapy applications.
  • To reduce the risk of generating replication-competent viruses through recombination.
  • To create a versatile vector system capable of transducing various cell types.

Main Methods:

  • Construction of a novel lentivirus vector, designated HIV/SIVpack/G, utilizing components from HIV, simian immunodeficiency virus (SIV), and vesicular stomatitis virus (VSV).

Related Experiment Videos

  • Encapsidation of an HIV-1-derived genome using SIVmac core particles.
  • Pseudotyping of the core particles with VSV glycoprotein G.
  • Assessment of transduction efficiency in diverse cell types, including human lymphocytes, macrophages, CD34(+) cells, and mouse neurons.

    • Main Results:

    • The HIV/SIVpack/G vector successfully transduced immortalized human lymphocytes, primary macrophages, CD34(+) cells, and mouse neurons.
    • This study represents the first instance of an HIV-1-derived genome being packaged by an SIVmac capsid.
    • The novel vector system demonstrated biological properties similar to conventional HIV-1 vectors.
    • The design, using low nucleotide homology between HIV-1 and SIVmac and a nonvirulent SIV packaging construct, significantly reduces recombination potential and pathogenicity risk.

    Conclusions:

    • The novel HIV/SIVpack/G lentivirus vector offers enhanced safety for gene therapy by minimizing recombination risks.
    • This vector system effectively recapitulates the transduction capabilities of HIV-1 vectors.
    • The use of SIVmac packaging and VSV-G pseudotyping provides a promising platform for safer gene delivery in clinical applications.