Retinal transduction profiles by high-capacity viral vectors

Gene Ther. 2014 Oct;21(10):855-65. doi: 10.1038/gt.2014.57. Epub 2014 Jul 3.

Abstract

Retinal gene therapy with adeno-associated viral (AAV) vectors is safe and effective in humans. However, the limited cargo capacity of AAV prevents their use for therapy of those inherited retinopathies (IRs) due to mutations in large (>5 kb) genes. Viral vectors derived from adenovirus (Ad), lentivirus (LV) and herpes virus (HV) can package large DNA sequences, but do not target efficiently retinal photoreceptors (PRs) where the majority of genes responsible for IRs are expressed. Here, we have evaluated the mouse retinal transduction profiles of vectors derived from 16 different Ad serotypes, 7 LV pseudotypes and from a bovine HV. Most of the vectors tested transduced efficiently the retinal pigment epithelium. We found that LV-GP64 tends to transduce more PRs than the canonical LV-VSVG, albeit this was restricted to a narrow region. We observed more extensive PR transduction with HdAd1, 2 and 5/F35++ than with LV, although none of them outperformed the canonical HdAd5 or matched the extension of PR transduction achieved with AAV2/8.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Dependovirus / classification
  • Dependovirus / genetics*
  • Electroretinography
  • Epithelial Cells / virology
  • Genetic Vectors / administration & dosage
  • Green Fluorescent Proteins / genetics
  • Green Fluorescent Proteins / metabolism
  • Herpesvirus 4, Bovine / classification
  • Herpesvirus 4, Bovine / genetics*
  • Lentivirus / classification
  • Lentivirus / genetics*
  • Male
  • Mice
  • Mice, Inbred BALB C
  • Photoreceptor Cells, Vertebrate / metabolism
  • Retinal Pigment Epithelium / cytology
  • Retinal Pigment Epithelium / virology*
  • Transduction, Genetic

Substances

  • Green Fluorescent Proteins