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Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2017

Local gene therapy durably restores vestibular function in a mouse model of Usher syndrome type 1G

Didier Dulon
Paul Avan

Résumé

Our understanding of the mechanisms underlying inherited forms of inner ear deficits has considerably improved during the past 20 y, but we are still far from curative treatments. We investigated gene replacement as a strategy for restoring inner ear functions in a mouse model of Usher syndrome type 1G, characterized by congenital profound deafness and balance disorders. These mice lack the scaffold protein sans, which is involved both in the morphogenesis of the stereociliary bundle, the sensory antenna of inner ear hair cells, and in the mechanoelectrical transduction process. We show that a single delivery of the sans cDNA by the adenoassociated virus 8 to the inner ear of newborn mutant mice reestablishes the expression and targeting of the protein to the tips of stereocilia. The therapeutic gene restores the architecture and mechanosensi-tivity of stereociliary bundles, improves hearing thresholds, and durably rescues these mice from the balance defects. Our results open up new perspectives for efficient gene therapy of cochlear and vestibular disorders by showing that even severe dysmorphogenesis of stereociliary bundles can be corrected. gene | therapy | balance | mouse | Usher

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Dates et versions

hal-01661148 , version 1 (26-12-2017)

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Alice Emptoz, Vincent Michel, Andrea Lelli, Omar Akil, Jacques Boutet de Monvel, et al.. Local gene therapy durably restores vestibular function in a mouse model of Usher syndrome type 1G. Proceedings of the National Academy of Sciences of the United States of America, 2017, 114 (36), pp.9695 - 9700. ⟨10.1073/pnas.1708894114⟩. ⟨hal-01661148⟩
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