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Related Experiment Videos

Stable and efficient intraocular gene transfer using pseudotyped EIAV lentiviral vectors.

K S Balaggan1, K Binley, M Esapa

  • 1Division of Molecular Therapy, Institute of Ophthalmology, 11-43 Bath Street, London EC1V 9EL, UK.

The Journal of Gene Medicine
|November 22, 2005
PubMed
Summary

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Minimal equine infectious anaemia virus (EIAV) vectors show potential for ocular gene therapy. These vectors efficiently transduced retinal cells and corneal cells, offering a promising tool for treating eye disorders.

Area of Science:

  • Ophthalmology
  • Gene Therapy
  • Virology

Background:

  • Development of minimal non-primate lentiviral vectors based on equine infectious anaemia virus (EIAV).
  • Evaluation of in vivo expression profiles of EIAV vectors for ocular gene therapy applications.

Purpose of the Study:

  • To define the potential utility of EIAV vectors in ocular gene therapy.
  • To analyze the in vivo expression profiles of EIAV vectors delivered to ocular tissues.

Main Methods:

  • EIAV vectors pseudotyped with VSV-G or rabies-G were administered via subretinal, intravitreal, or intracameral routes in mice.
  • Reporter gene (eGFP) expression was assessed using in vivo imaging and histology up to 16 months.
  • Factors influencing expression, including vector titre, pseudotype, administration site, and retinal trauma, were investigated.

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Main Results:

  • Subretinal delivery led to stable transduction of retinal pigment epithelial (RPE) cells and photoreceptors for up to 16 months.
  • Retinal trauma enhanced transduction of neurosensory retinal cells.
  • Intracameral delivery of VSV-G pseudotyped vectors resulted in stable expression in corneal endothelial and trabecular meshwork cells.

Conclusions:

  • Optimized EIAV vectors demonstrate suitable cellular tropism and expression kinetics for intraocular gene delivery.
  • These vectors are promising for treating inherited and acquired retinal and anterior segment disorders.
  • EIAV vectors offer a viable alternative for ocular gene therapy strategies.