• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Electrophysiological analysis of fibrocytes of the spiral ligament in the inner ear

Research Project

Project/Area Number 17K16924
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Otorhinolaryngology
Research InstitutionKyushu University

Principal Investigator

Yoshida Takamasa  九州大学, 大学病院, 助教 (50600912)

Research Collaborator NAKAGAWA Takashi  九州大学, 大学院医学研究院, 教授 (70274470)
HIBINO Hiroshi  新潟大学, 医歯学系, 教授 (70314317)
NIN Fumiaki  新潟大学, 医歯学系, 准教授 (80644905)
OGATA Genki  新潟大学, 医歯学系, 特任講師 (80452829)
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords内耳 / 蝸牛 / 電気生理 / ラセン靱帯 / 聴覚 / ラセン靭帯 / 耳科学 / 生理学
Outline of Final Research Achievements

Endocochlear potential (EP) is essential for hearing, and depends on ion transport of the lateral cochlear wall. In this study, we performed slice patch clamp experiments of the lateral cochlear wall, and a Na current was recorded in the spiral ligament. This Na current was consistent with the results of in vivo experiments and a computer simulation analysis. These findings suggested that the fibrocytes in the spiral ligament have Na channels which are important for the EP.

Academic Significance and Societal Importance of the Research Achievements

内耳蝸牛の内リンパ液が持つ+80mVもの高電位は、聴覚の高い感受性を支える「電池」としての役割を持つ。本課題ではこの電池の「電源」に相当する蝸牛側壁を対象として電気生理学的解析を行い、電源の重要な要素としてNaチャネルが存在する可能性を見出した。今後その分子実体を解明することで、内耳性難聴の病態理解が進み、難聴疾患に対する創薬や再生医療の基盤となりうると考えられる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2018 2017

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Diagnosis and following up of Meniere’s disease using multifrequency tympanometry?Cutoff values and temporal changes in measurements2018

    • Author(s)
      Ishizu Kazuyuki、Tamae Akihiro、Kubo Kazuhiko、Yoshida Takamasa、Matsumoto Nozomu、Yasui Tetsurou、Nakagawa Takashi
    • Journal Title

      Auris Nasus Larynx

      Volume: 45 Issue: 1 Pages: 81-87

    • DOI

      10.1016/j.anl.2017.05.008

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of the effects of chronic kidney disease and hemodialysis on the inner ear using multifrequency tympanometry.2018

    • Author(s)
      Tamae A, Ishizu K, Yoshida T, Kubo K, Matsumoto N, Yasui T, Masutani K, Tsuruya K, Nakagawa T.
    • Journal Title

      J Int Adv Otol

      Volume: 14 Issue: 3 Pages: 447-450

    • DOI

      10.5152/iao.2018.4736

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Computer modeling defines the system driving a constant current crucial for homeostasis in the mammalian cochlea by integrating unique ion transports2017

    • Author(s)
      Nin F, et al.
    • Journal Title

      npj Systems Biology and Applications

      Volume: 3 Issue: 1 Pages: 4-4

    • DOI

      10.1038/s41540-017-0025-0

    • NAID

      130007901272

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fibrocytes in the cochlea of the mammalian inner ear: their molecular architecture, physiological properties, and pathological relevance2017

    • Author(s)
      Yoshida T, et al.
    • Journal Title

      Medical Research Archives

      Volume: 5 Issue: 6 Pages: 1335-1335

    • DOI

      10.18103/mra.v5i6.1335

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A microsensing system for the in vivo real-time detection of local drug kinetics2017

    • Author(s)
      Ogata G, et al.
    • Journal Title

      Nature Biomedical Engineering

      Volume: 1 Issue: 8 Pages: 654-666

    • DOI

      10.1038/s41551-017-0118-5

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hearing Loss Controlled by Optogenetic Stimulation of Nonexcitable Nonglial Cells in the Cochlea of the Inner Ear2017

    • Author(s)
      Sato MP, et al.
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 10 Pages: 300-300

    • DOI

      10.3389/fnmol.2017.00300

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Diagnostic value of the multifrequency tympanometry in the patients with Meniere’s disease2018

    • Author(s)
      Yoshida T, Kubo K, Nakagawa T
    • Organizer
      30th Barany Society Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 突発性難聴の予後因子としての末梢血白血球数および好中球数に関する検討2018

    • Author(s)
      吉田崇正、久保和彦、園田世里夏、中川尚志
    • Organizer
      第27回日本耳科学会総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Multifrequency tympanometryを用いたメニエール病診断2018

    • Author(s)
      吉田崇正、久保和彦、友延恵理、中川尚志
    • Organizer
      第77回日本めまい平衡医学会総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ラセン靭帯の線維細胞がin vivoで示すNa透過性に関する数理モデルを用いた検討2017

    • Author(s)
      吉田崇正、日比野浩、中川尚志
    • Organizer
      第62回日本聴覚医学会総会
    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2020-05-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi