Abstract
Knowledge of the mutations leading to inherited retinal degenerations provides a foundation for the development of somatic gene therapy in which potentially corrective genes are transferred to the target photoreceptor cells. Towards this end, we have evaluated the efficacy of a recombinant adeno-associated virus (AAV) vector to deliver and express the correct form of the cGMP phosphodiesterase-β (PDE-β) gene in the retinas of rd mice, which suffer rapid retinal degeneration due to recessive mutation in the endogenous gene. A truncated murine opsin promoter was used to drive expression of the PDE-β cDNA. Following intraocular injection of AAV.PDE-β, increased retinal expression of immunoreactive PDE protein was observed, including within photoreceptor cell bodies. Compared with age-matched controls, treated eyes showed increased numbers of photoreceptors and a two-fold increase in sensitivity to light as measured by in vitro electroretinography. These findings provide evidence that rescue of functional photoreceptor neurons can be achieved by somatic gene therapy.
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Jomary, C., Vincent, K., Grist, J. et al. Rescue of photoreceptor function by AAV-mediated gene transfer in a mouse model of inherited retinal degeneration. Gene Ther 4, 683–690 (1997). https://doi.org/10.1038/sj.gt.3300440
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DOI: https://doi.org/10.1038/sj.gt.3300440
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