Restriction of the felid lentiviruses by a synthetic feline TRIM5-CypA fusion

Vet Immunol Immunopathol. 2011 Oct 15;143(3-4):235-42. doi: 10.1016/j.vetimm.2011.06.017. Epub 2011 Jun 12.


Gene therapy approaches to the treatment of HIV infection have targeted both viral gene expression and the cellular factors that are essential for virus replication. However, significant concerns have been raised regarding the potential toxic effects of such therapies, the emergence of resistant viral variants and unforeseen biological consequences such as enhanced susceptibility to unrelated pathogens. Novel restriction factors formed by the fusion of the tripartite motif protein (TRIM5) and cyclophilin A (CypA), or "TRIMCyps", offer an effective antiviral defence strategy with a very low potential for toxicity. In order to investigate the potential therapeutic utility of TRIMCyps in gene therapy for AIDS, a synthetic fusion protein between feline TRIM5 and feline CypA was generated and transduced into cells susceptible to infection with feline immunodeficiency virus (FIV). The synthetic feline TRIMCyp was highly efficient at preventing infection with both HIV and FIV and the cells resisted productive infection with FIV from either the domestic cat or the puma. Feline TRIMCyp and FIV infection of the cat offers a unique opportunity to evaluate TRIMCyp-based approaches to genetic therapy for HIV infection and the treatment of AIDS.

Publication types

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

MeSH terms

  • Acquired Immunodeficiency Syndrome / therapy
  • Animals
  • Artificial Gene Fusion*
  • Carrier Proteins / genetics*
  • Cats / virology
  • Cyclophilin A / genetics*
  • Genetic Therapy
  • Humans
  • Immunodeficiency Virus, Feline / genetics
  • Lentiviruses, Feline / genetics*
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / metabolism*
  • Tripartite Motif Proteins
  • Ubiquitin-Protein Ligases


  • Carrier Proteins
  • Recombinant Fusion Proteins
  • Tripartite Motif Proteins
  • TRIM5 protein, human
  • Ubiquitin-Protein Ligases
  • Cyclophilin A