論文

査読有り
2017年9月

Hearing Loss Controlled by Optogenetic Stimulation of Nonexcitable Nonglial Cells in the Cochlea of the Inner Ear

FRONTIERS IN MOLECULAR NEUROSCIENCE
  • Mitsuo P. Sato
  • ,
  • Taiga Higuchi
  • ,
  • Fumiaki Nin
  • ,
  • Genki Ogata
  • ,
  • Seishiro Sawamura
  • ,
  • Takamasa Yoshida
  • ,
  • Takeru Ota
  • ,
  • Karin Hori
  • ,
  • Shizuo Komune
  • ,
  • Satoru Uetsuka
  • ,
  • Samuel Choi
  • ,
  • Masatsugu Masuda
  • ,
  • Takahisa Watabe
  • ,
  • Sho Kanzaki
  • ,
  • Kaoru Ogawa
  • ,
  • Hidenori Inohara
  • ,
  • Shuichi Sakamoto
  • ,
  • Hirohide Takebayashi
  • ,
  • Katsumi Doi
  • ,
  • Kenji F. Tanaka
  • ,
  • Hiroshi Hibino

10
開始ページ
300
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3389/fnmol.2017.00300
出版者・発行元
FRONTIERS MEDIA SA

Light-gated ion channels and transporters have been applied to a broad array of excitable cells including neurons, cardiac myocytes, skeletal muscle cells and pancreatic b -cells in an organism to clarify their physiological and pathological roles. Nonetheless, among nonexcitable cells, only glial cells have been studied in vivo by this approach. Here, by optogenetic stimulation of a different nonexcitable cell type in the cochlea of the inner ear, we induce and control hearing loss. To our knowledge, deafness animal models using optogenetics have not yet been established. Analysis of transgenic mice expressing channelrhodopsin-2 (ChR2) induced by an oligodendrocyte-specific promoter identified this channel in nonglial cells-melanocytes-of an epithelial-like tissue in the cochlea. The membrane potential of these cells underlies a highly positive potential in a K C -rich extracellular solution, endolymph; this electrical property is essential for hearing. Illumination of the cochlea to activate ChR2 and depolarize the melanocytes significantly impaired hearing within a few minutes, accompanied by a reduction in the endolymphatic potential. After cessation of the illumination, the hearing thresholds and potential returned to baseline during several minutes. These responses were replicable multiple times. ChR2 was also expressed in cochlear glial cells surrounding the neuronal components, but slight neural activation caused by the optical stimulation was unlikely to be involved in the hearing impairment. The acuteonset, reversible and repeatable phenotype, which is inaccessible to conventional gene-targeting and pharmacological approaches, seems to at least partially resemble the symptom in a population of patients with sensorineural hearing loss. Taken together, this mouse line may not only broaden applications of optogenetics but also contribute to the progress of translational research on deafness.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.3389/fnmol.2017.00300
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/29018325
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000411283200002&DestApp=WOS_CPL

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