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- W3125280579 abstract "Abstract Vision restoration is an ideal medical application for optogenetics, because the eye provides direct optical access to the retina for stimulation. Optogenetic therapy could be used for diseases involving photoreceptor degeneration, such as retinitis pigmentosa or age-related macular degeneration. We describe here the selection, in non-human primates, of a specific optogenetic construct currently tested in a clinical trial. We used the microbial opsin ChrimsonR, and showed that the AAV2.7m8 vector had a higher transfection efficiency than AAV2 in retinal ganglion cells (RGCs) and that ChrimsonR fused to tdTomato (ChR-tdT) was expressed more efficiently than ChrimsonR. Light at 600 nm activated RGCs transfected with AAV2.7m8 ChR-tdT, from an irradiance of 10 15 photons.cm −2 .s −1 . Vector doses of 5 × 10 10 and 5 × 10 11 vg/eye transfected up to 7000 RGCs/mm 2 in the perifovea, with no significant immune reaction. We recorded RGC responses from a stimulus duration of 1 ms upwards. When using the recorded activity to decode stimulus information, we obtained an estimated visual acuity of 20/249, above the level of legal blindness (20/400). These results lay the groundwork for the ongoing clinical trial with the AAV2.7m8 - ChR-tdT vector for vision restoration in patients with retinitis pigmentosa." @default.
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- W3125280579 date "2021-01-27" @default.
- W3125280579 modified "2023-10-06" @default.
- W3125280579 title "Optogenetic therapy: high spatiotemporal resolution and pattern discrimination compatible with vision restoration in non-human primates" @default.
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- W3125280579 doi "https://doi.org/10.1038/s42003-020-01594-w" @default.
- W3125280579 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7840970" @default.
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- W3125280579 hasPublicationYear "2021" @default.
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