Mechanotransduction is required for establishing and maintaining mature inner hair cells and regulating efferent innervation

Abstract

In the adult auditory organ, mechanoelectrical transducer (MET) channels are essential for transducing acoustic stimuli into electrical signals. In the absence of incoming sound, a fraction of the MET channels on top of the sensory hair cells are open, resulting in a sustained depolarizing current. By genetically manipulating the in vivo expression of molecular components of the MET apparatus, we show that during pre-hearing stages the MET current is essential for establishing the electrophysiological properties of mature inner hair cells (IHCs). If the MET current is abolished in adult IHCs, they revert into cells showing electrical and morphological features characteristic of pre-hearing IHCs, including the re-establishment of cholinergic efferent innervation. The MET current is thus critical for the maintenance of the functional properties of adult IHCs, implying a degree of plasticity in the mature auditory system in response to the absence of normal transduction of acoustic signals.

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Item Type:	Article
Authors/Creators:	Corns, L.F. Johnson, S.L. Roberts, T. Ranatunga, K.M. Hendry, A. Ceriani, F. https://orcid.org/0000-0002-5366-341X Safieddine, S. Steel, K.P. Forge, A. https://orcid.org/0000-0002-0995-0219 Petit, C. Furness, D.N. Kros, C.J. Marcotti, W. https://orcid.org/0000-0002-8770-7628
Copyright, Publisher and Additional Information:	This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Dates:	Published: 1 October 2018 Accepted: 21 August 2018
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > School of Biosciences (Sheffield) > Department of Biomedical Science (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	09 Oct 2018 15:11
Last Modified:	09 Oct 2018 15:11
Published Version:	https://doi.org/10.1038/s41467-018-06307-w
Status:	Published
Publisher:	Nature Research
Identification Number:	10.1038/s41467-018-06307-w
Related URLs:	PubMed URL
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:136735

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Mechanotransduction is required for establishing and maintaining mature inner hair cells and regulating efferent innervation

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