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Recovery kinetics of dual AAV-mediated human otoferlin expression

Authors :
Jonathan B. Sellon
Kathy S. So
Andrew D'Arcangelo
Sarah Cancelarich
Meghan C. Drummond
Peter G. Slade
Ning Pan
Tyler M. Gibson
Tian Yang
Joseph C. Burns
Adam T. Palermo
Lars Becker
Source :
Frontiers in Molecular Neuroscience, Vol 17 (2024)
Publication Year :
2024
Publisher :
Frontiers Media S.A., 2024.

Abstract

Deafness-causing deficiencies in otoferlin (OTOF) have been addressed preclinically using dual adeno-associated virus (AAV)-based approaches. However, timing of transduction, recombination of mRNA, and protein expression with dual hybrid AAV methods methods have not previously been characterized. Here, we have established an ex vivo assay to determine the kinetics of dual-AAV mediated expression of OTOF in hair cells of the mouse utricle. We utilized two different recombinant vectors that comprise DB-OTO, one containing the 5′ portion of OTOF under the control of the hair cell-specific Myo15 promoter, and the other the 3′ portion of OTOF. We explored specificity of the Myo15 promoter in hair cells of the mouse utricle, established dose response characteristics of DB-OTO ex vivo in an OTOF-deficient mouse model, and demonstrated tolerability of AAV1 in utricular hair cells. Furthermore, we established deviations from a one-to-one ratio of 5′ to 3′ vectors with little impact on recombined OTOF. Finally, we established a plateau in quantity of recombined OTOF mRNA and protein expression by 14 to 21 days ex vivo with comparable recovery timing to that in vivo model. These findings demonstrate the utility of an ex vivo model system for exploring expression kinetics and establish in vivo and ex vivo recovery timing of dual AAV-mediated OTOF expression.

Details

Language :
English
ISSN :
16625099
Volume :
17
Database :
Directory of Open Access Journals
Journal :
Frontiers in Molecular Neuroscience
Publication Type :
Academic Journal
Accession number :
edsdoj.844378fd26b47b3b6c0c1450c88a3a4
Document Type :
article
Full Text :
https://doi.org/10.3389/fnmol.2024.1376128