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Pathophysiological study of age-related hearing loss by glutamate imaging

Research Project

Project/Area Number 16K11204
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Otorhinolaryngology
Research InstitutionNational Rehabilitation Center for Persons with Disabilities

Principal Investigator

Takago Hideki  国立障害者リハビリテーションセンター(研究所), 研究所 感覚機能系障害研究部, 研究室長 (70401354)

Co-Investigator(Kenkyū-buntansha) 大島 知子  東京大学, 大学院医学系研究科(医学部), 特任研究員 (50731783)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords内耳 / 蝸牛 / 有毛細胞 / シナプス / リボン / グルタミン酸 / イメージング / パッチクランプ / リボンシナプス / グルタミン酸イメージング / 加齢性難聴 / 聴覚 / 蝸牛神経
Outline of Final Research Achievements

This study aims to clarify pathophysiological mechanisms for age-related hearing loss (ARHL) using patch-clamp and glutamate imaging techniques to analyze senescent changes in inner hair cell (IHC) ribbon synapse functions of C57BL/6J mice, which are routinely employed as a model for ARHL. Whole-cell patch-clamp recordings from IHCs revealed smaller Ca2+ current amplitude in ARHL-model mice than in normal-hearing young mice. Notably, glutamate imaging using a glutamate optical sensor named EOS visualized excitatory neurotransmitter release from IHCs in young mice in real-time, although its temporal resolution remains to be improved to monitor auditory signal transduction in a millisecond time scale. This novel imaging technique might be a useful tool for analyses of synaptic functions of deaf mutant mice as well as differential diagnosis of patients with sensorineural hearing loss using disease-specific hair cell-like iPS cells.

Academic Significance and Societal Importance of the Research Achievements

グルタミン酸イメージングを活用した本研究により、マウス蝸牛・内有毛細胞において神経伝達物質放出をリアルタイムで計測する道が拓かれた。今後、グルタミン酸イメージングの時間分解能を改善するとともに適用標本を拡大することで、感音難聴の病態解明研究が進展することが期待される。また、疾患特異的有毛細胞様iPS細胞を活用することで、感音難聴患者・児の障害部位の診断が現状よりも正確に行えるようになる可能性がある。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (16 results)

All 2020 2019 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 2 results) Remarks (2 results)

  • [Int'l Joint Research] ゲッティンゲン大学(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Disruption of otoferlin alters the mode of exocytosis at the mouse inner hair cell ribbon synapse2019

    • Author(s)
      Hideki Takago, Tomoko Oshima-Takago, Tobias Moser
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 11 Pages: 492-492

    • DOI

      10.3389/fnmol.2018.00492

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pre- and postsynaptic ionotropic glutamate receptors in the auditory system of mammals2018

    • Author(s)
      Takago Hideki、Oshima-Takago Tomoko
    • Journal Title

      Hearing Research

      Volume: 362 Pages: 1-13

    • DOI

      10.1016/j.heares.2018.02.007

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] NMDA receptor-dependent presynaptic inhibition at the calyx of Held synapse of rat pups2017

    • Author(s)
      Oshima-Takago Tomoko、Takago Hideki
    • Journal Title

      Open Biology

      Volume: 7 Issue: 7 Pages: 170032-170032

    • DOI

      10.1098/rsob.170032

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 内有毛細胞リボンシナプスにおけるBassoonとOtoferlinによるグルタミン酸放出の制御2020

    • Author(s)
      鷹合 秀輝
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 網膜双極細胞リボンシナプスにおけるグルタミン酸放出の可視化2020

    • Author(s)
      大島 知子、坂本 寛和、並木 繁行、廣瀬 謙造、立花 政夫、鷹合 秀輝
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Optical measurements of glutamate release from multiple ribbon-type synapses at the terminal of goldfish retinal bipolar cell2019

    • Author(s)
      Tomoko Oshima-Takago, Hirokazu Sakamoto, Shigeyuki Namiki, Kenzo Hirose, Masao Tachibana, Hideki Takago
    • Organizer
      Ribbon Synapses Symposium 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bassoon and Otoferlin-dependent regulation of glutamate release at the inner hair cell ribbon synapse2019

    • Author(s)
      鷹合秀輝
    • Organizer
      第124回日本解剖学会総会全国学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] 若齢ラットcalyx of HeldシナプスにおけるNMDA受容体依存性シナプス前抑制2017

    • Author(s)
      大島知子, 鷹合秀輝
    • Organizer
      第94回日本生理学会大会
    • Place of Presentation
      浜松市
    • Year and Date
      2017-03-28
    • Related Report
      2016 Research-status Report
  • [Presentation] 中枢神経系のグルタミン酸作動性シナプスにおいてシナプス前NMDA受容体は電位依存性カルシウムチャネルを抑制する2017

    • Author(s)
      鷹合秀輝, 大島知子
    • Organizer
      第90回日本薬理学会年会
    • Place of Presentation
      長崎市
    • Year and Date
      2017-03-15
    • Related Report
      2016 Research-status Report
  • [Presentation] Presynaptic N-methyl-D-aspartate receptor inhibits Ca2+ currents at a rat central glutamatergic synapse2017

    • Author(s)
      Oshima-Takago T, Takago H
    • Organizer
      6th Mediterranean Neuroscience Society Conference 2017 MALTA MNS2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 聴覚中枢におけるNMDA受容体によるシナプス前抑制2017

    • Author(s)
      鷹合秀輝, 大島知子
    • Organizer
      第62回日本聴覚医学会総会・学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] ラット聴覚中枢におけるシナプス前部NMDA受容体による神経伝達物質放出の抑制2017

    • Author(s)
      鷹合秀輝
    • Organizer
      第27回日本耳科学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 幼若ラットcalyx of HeldシナプスにおけるNMDA受容体依存性シナプス前抑制2016

    • Author(s)
      大島知子, 鷹合秀輝
    • Organizer
      生理学研究所シナプス研究会
    • Place of Presentation
      岡崎市
    • Year and Date
      2016-11-21
    • Related Report
      2016 Research-status Report
  • [Remarks] 国立障害者リハビリテーションセンター・研究所・感覚認知障害研究室

    • URL

      http://www.rehab.go.jp/ri/departj/kankaku/465/

    • Related Report
      2019 Annual Research Report
  • [Remarks] 国立障害者リハビリテーションセンター・研究所・感覚機能系障害研究部・感覚認知障害研究室

    • URL

      http://www.rehab.go.jp/ri/departj/kankaku/465/

    • Related Report
      2018 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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