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Comprehensive analysis of the calcium channels and its relating mechanisms of the inner ear

Research Project

Project/Area Number 15H04990
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Otorhinolaryngology
Research InstitutionNagoya City University

Principal Investigator

Inagaki Akira  名古屋市立大学, 医薬学総合研究院(医学), 講師 (70405166)

Co-Investigator(Kenkyū-buntansha) 鵜川 眞也  名古屋市立大学, 医薬学総合研究院(医学), 教授 (20326135)
蒲谷 嘉代子  名古屋市立大学, 医薬学総合研究院(医学), 助教 (50569259)
富永 真琴  大学共同利用機関法人自然科学研究機構(新分野創成センター、アストロバイオロジーセンター、生命創成探究, 生命創成探究センター, 教授 (90260041)
村上 信五  名古屋市立大学, 医薬学総合研究院(医学), 教授 (80157750)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Keywords内耳 / 聴覚 / 蝸牛 / カルシウム感知受容体 / 薬理学 / カルシウムチャネル / 生理学 / カルシウム / 医療・福祉 / 神経科学 / 薬学 / 耳科学 / 耳鼻咽喉科学 / 遺伝子スクリーニング / 内耳内投与
Outline of Final Research Achievements

Calcium signaling plays important roles especially in excitable cells, such as myocytes and neuronal cells. The signal in the inner ear has been reported and its roles are partially elucidated, but there are number of issues that remain to be elucidated. Here we investigated inner ear calcium signaling by a comprehensive approach, aiming at manipulating it pharmacologically to have beneficial biological effects.
We identified calcium sensing receptor as a novel drug target in the inner ear and identified is cellular distribution in the cochlea for the first time. Also, a new technique developed in this study revealed it is susceptible for pharmacologically inhibition. Pharmacological inhibition induced moderate hearing loss; demonstrating its essential role for hearing. This result shows a part of inner ear mechanism maintaining the unique ionic composition in the inner ear, especially that of calcium ion, which has not well evaluated to date.

Academic Significance and Societal Importance of the Research Achievements

カルシウムイオンは細胞内のシグナル伝達など重要な役割を果たし、また、細胞障害に重要な役割を果たすことからその恒常性維持は器官の機能維持に重要である。本研究は内耳においてカルシウムイオンの恒常性の維持がどのように行われているかそのメカニズムの一端を明らかにし、それが薬理学的に調節できることを示した。将来的には、組織保護、すなわち聴覚保護や聴覚増強につながることが期待される。

Report

(5 results)
  • 2019 Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (13 results)

All 2020 2019 2018 2017 2016

All Journal Article (11 results) (of which Peer Reviewed: 10 results,  Open Access: 2 results) Presentation (1 results) Book (1 results)

  • [Journal Article] Concurrent Treatment With Intratympanic Dexamethasone Improves Facial Nerve Recovery in Ramsay Hunt Syndrome2020

    • Author(s)
      Inagaki A, Minakata T, Katsumi S, Murakami S.
    • Journal Title

      Journal of neurological sciences

      Volume: 410 Pages: 116678-116678

    • DOI

      10.1016/j.jns.2020.116678

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 【感覚受容 最前線】聴覚 蝸牛におけるイオン調節機構2020

    • Author(s)
      稲垣 彰
    • Journal Title

      Clinical Neuroscience 臨床神経科学

      Volume: 37 Pages: 1474-1477

    • Related Report
      2018 Annual Research Report
  • [Journal Article] An Unusual Tumor of the Ear: Pilomatricoma in a Middle-Aged Woman.2019

    • Author(s)
      Inagaki A, Yamashita Y, Mori Y, Takeuchi E, Asaoka K, Murakami S.
    • Journal Title

      Case Rep Otolaryngol.

      Volume: 0 Pages: 0-0

    • DOI

      10.1155/2019/4975216

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Concurrent Treatment With Intratympanic Dexamethasone for Moderate-Severe Through Severe Bell's Palsy2019

    • Author(s)
      Inagaki A, Minakata T, Katsumi S, Murakami S.
    • Journal Title

      Otology Neurotology

      Volume: 40 Issue: 10 Pages: e1018-e1023

    • DOI

      10.1097/mao.0000000000002377

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Clinical and Radiological Characteristics of Malignant Tumors Located to the Cerebellopontine Angle and/or Internal Acoustic Meatus2019

    • Author(s)
      Eliezer M, Tran H, Inagaki A, Vérillaud B, Takahashi M, Marie JP, Hautefort C, Herman P, Murakami S, Kania R.
    • Journal Title

      Otology Neurology

      Volume: 40 Issue: 9 Pages: 1237-1245

    • DOI

      10.1097/mao.0000000000002360

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Calcium-Sensing Receptor Is Functionally Expressed in the Cochlear Perilymphatic Compartment and Essential for Hearing2019

    • Author(s)
      Minakata Toshiya、Inagaki Akira、Yamamura Aya、Yamamura Hisao、Sekiya Shinji、Murakami Shingo
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 12 Pages: 175-175

    • DOI

      10.3389/fnmol.2019.00175

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Contrast-enhanced magnetic resonance imaging of facial nerve swelling in patients with severe Ramsay Hunt syndrome.2019

    • Author(s)
      Minakata T, Inagaki A, Sekiya S, Murakami S.
    • Journal Title

      Auris Nasus Larynx.

      Volume: 46 Issue: 5 Pages: 687-695

    • DOI

      10.1016/j.anl.2018.12.015

    • NAID

      130007993622

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Developmental delays assessed using the Enjoji Scale in children with cochlear implants who have intellectual disability with or without autism spectrum disorder.2019

    • Author(s)
      Motegi M, Inagaki A, Minakata T, Sekiya S, Takahashi M, Sekiya Y, Murakami S.
    • Journal Title

      Auris Nasus Larynx.

      Volume: 46 Issue: 4 Pages: 498-506

    • DOI

      10.1016/j.anl.2018.12.003

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The inflammatory pseudotumor presenting periodic acid-Schiff-positive inclusions with acute unilateral facial nerve palsy.2019

    • Author(s)
      Inagaki A, Motegi M, Sato Y, Hattori H, Murakami S.
    • Journal Title

      Auris Nasus Larynx.

      Volume: 46 Issue: 3 Pages: 465-468

    • DOI

      10.1016/j.anl.2018.06.009

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An improved system for grading and treating tinnitus.2017

    • Author(s)
      Takahashi M, Kabaya K, Sekiya K, Matsuda F, Sekiya Y, Esaki S, Sato Y, Inagaki A, Murakami S.
    • Journal Title

      Auris Nasus Larynx

      Volume: 27 Issue: 4 Pages: 30808-8

    • DOI

      10.1016/j.anl.2017.11.012

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Postoperative Headache after Undergoing Acoustic Neuroma Surgery via the Retrosigmoid Approach2017

    • Author(s)
      Aihara N, Yamada H, Takahashi M, Inagaki A, Murakami S, Mase M.
    • Journal Title

      Neurologia medico-chirurgica

      Volume: 57 Issue: 12 Pages: 634-640

    • DOI

      10.2176/nmc.oa.2017-0108

    • NAID

      130006250662

    • ISSN
      0470-8105, 1349-8029
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] 蝸牛内カルシウム制御に関与する新たな分子機構の検2018

    • Author(s)
      南方 寿哉、稲垣 彰、関谷 真二、村上 信五
    • Organizer
      第28回日本耳科学会総会・学術講演会
    • Related Report
      2017 Annual Research Report
  • [Book] 広川信隆 編 ブレインサイエンスレビュー20162016

    • Author(s)
      稲垣彰
    • Total Pages
      343
    • Publisher
      グバプロ
    • Related Report
      2015 Annual Research Report

URL: 

Published: 2015-04-16   Modified: 2022-11-04  

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