Simian retrovirus vectors for gene transfer in nonhuman primate cells

Biao Li, Susan Nguyen, Xiaorong Li, Curtis A. Machida

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We have recently identified and sequenced a molecular clone of the serogroup 2 simian retrovirus (SRV), D2/RHE/OR/V1, that retains an enhanced ability to infect specific T cell lines. In this report, using deletion mutagenesis, we localized the psi packaging signal, necessary for packaging of D2/RHE/OR/V1 particles, to the genomic region 345-650, which comprises the 5′ intergenic region (IR) and the extreme 5′ portion of the gag gene. To build an SRV-based gene transfer system and to reduce the possibility of recombination and regeneration of replication-competent viruses, we constructed split-genome D2/RHE/OR/V1 plasmid recombinants containing distinct and non-overlapping retroviral gene regions and several replacement components. For the retrovirus gene transfer vehicle, we deleted the D2/RHE/OR/V1 structural genes and substituted a cassette including the psi-packaging region, the β-galactosidase reporter gene, and the 3′ IR. Both packaging cell recombinants were used to generate stable monkey packaging cell lines; the gene transfer vehicle was subsequently transfected into the packaging cell lines, and replication-defective viruses were recovered for subsequent infection into fresh monkey cells. Successful infection by the recovered viruses verifies the potential efficacy of the SRV-based system as a research tool for gene transfer of heterologous genes into nonhuman primate cells.

Original languageEnglish (US)
Pages (from-to)155-168
Number of pages14
JournalVirus Research
Issue number2
StatePublished - Jun 2001
Externally publishedYes


  • D2/RHE/OR/V1 serogroup 2 SRV
  • Psi packaging signal
  • SRV-based gene transfer system
  • Simian retrovirus (SRV) vectors
  • Split-genome packaging cell recombinants

ASJC Scopus subject areas

  • Cancer Research
  • Virology
  • Infectious Diseases


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