| 게재년월 |
2022/02 |
| 논문제목 |
In vivo outer hair cell gene editing ameliorates progressive hearing loss in dominant-negative Kcnq4 murine model
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| 참여교수 |
지헌영, 김형범 |
| 학술지명 |
Theranostics |
| 초록 |
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. |
| 게재정보 |
Theranostics. 2022 Feb 28;12(5):2465-2482 |
| 총저자명 |
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
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