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In vivo outer hair cell gene editing ameliorates progressive hearing loss in dominant-negative Kcnq4 murine model

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Title
In vivo outer hair cell gene editing ameliorates progressive hearing loss in dominant-negative Kcnq4 murine model
Author(s)
Byunghwa Noh; John Hoon Rim; Ramu Gopalappa; Haiyue Lin; Kyu Min Kim; Min Jin Kang; Heon Yung Gee; Jae Young Choi; Hyongbum Henry Kim; Jinsei Jung
Publication Date
2022-01
Journal
Theranostics, v.12, no.5, pp.2465 - 2482
Publisher
Ivyspring International Publisher
Abstract
© 2022 Ivyspring International Publisher. All rights reserved.Outer hair cell (OHC) degeneration is a major cause of progressive hearing loss and presbycusis. Despite the high prevalence of these disorders, targeted therapy is currently not available. Methods: We generated a mouse model harboring Kcnq4W276S/+ to recapitulate DFNA2, a common genetic form of progressive hearing loss accompanied by OHC degeneration. After comprehensive optimization of guide RNAs, Cas9s, vehicles, and delivery routes, we applied in vivo gene editing strategy to disrupt the dominant-negative allele in Kcnq4 and prevent progressive hearing loss. Results: In vivo gene editing using a dual adeno-associated virus package targeting OHCs significantly improved auditory thresholds in auditory brainstem response and distortion-product otoacoustic emission. In addition, we developed a new live-cell imaging technique using thallium ions to investigate the membrane potential of OHCs and successfully demonstrated that mutant allele disruption resulted in more hyperpolarized OHCs, indicating elevated KCNQ4 channel activity. Conclusion: These findings can facilitate the development of targeted therapies for DFNA2 and support the use of CRISPR-based gene therapy to rectify defects in OHCs.
URI
https://pr.ibs.re.kr/handle/8788114/11608
DOI
10.7150/thno.67781
ISSN
1838-7640
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > 1. Journal Papers (저널논문)
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