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The development of the method to assess the degree of endolymphatice hydrops in patients with Meniere disease

Research Project

Project/Area Number 17K11327
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Otorhinolaryngology
Research InstitutionOsaka University

Principal Investigator

Imai Takao  大阪大学, 医学系研究科, 准教授 (80570663)

Co-Investigator(Kenkyū-buntansha) 太田 有美  大阪大学, 医学系研究科, 助教 (00598401)
滝本 泰光  大阪大学, 医学系研究科, 招へい教員 (00624298)
島田 昌一  大阪大学, 医学系研究科, 教授 (20216063)
佐藤 崇  大阪大学, 医学系研究科, 助教 (30756002)
奥村 朋子  大阪大学, 医学系研究科, 特任研究員 (90734070)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsメニエール病 / 内耳造影MRI / 回転検査 / 耳石器機能検査 / 内リンパ水腫 / マウス / 前庭動眼反射 / 生理学 / 神経科学
Outline of Final Research Achievements

Meniere disease is one of the most common disease of which complaint is vertigo. The pathophysiology is endolymphatic hydrops in inner ear. The present findings suggest that sac surgery reduces vestibular endolymphatic hydrops and prevents aggravation of cochlear endolymphatic hydrops, and these changes lead to a reduction of vertigo attacks and suppress the progression of hearing impairment associated with vertigo attacks. P2X2 receptors are ligand-gated cation channels activated by extracellular ATP that modulate neural transmission in various neuronal systems. The physiological role of P2X2 receptor in the vestibular portion is still not understood. We showed that P2X2 receptors are mainly localized in the supporting cells of the vestibular inner ear, and the loss of P2X2 receptors causes mild vestibular dysfunction. Taken together, our findings suggest that the P2X2 receptor plays a modulatory role in vestibular function.

Academic Significance and Societal Importance of the Research Achievements

当研究により、メニエール病の内リンパ水腫の存在範囲を評価する方法を開発した。この方法を使用することにより、内リンパ水腫の存在範囲に従って病期を分類すれば客観的な病期分類が作成できる。また、メニエール病の治療前後の内リンパ水腫の範囲の変化の計測により、治療効果が評価できることに当研究の学術的意義がある。メニエール病はめまい発作を繰り返す疾患であり、メニエール病患者ではめまい発作を理由にした早期退職や欠勤、生産性低下が生じるので、メニエール病の治療により、社会的生産性の向上につながる。当研究結果を用いてメニエール病の治療効果を判定すれば、最善の治療法が決定できることに当研究の社会的意義がある。

Report

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

    (10 results)

All 2019 2018 2017

All Journal Article (7 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (3 results) (of which Invited: 2 results)

  • [Journal Article] Effects of Interval Time of the Epley Maneuver on Immediate Reduction of Positional Nystagmus: A Randomized, Controlled, Non-blinded Clinical Trial2019

    • Author(s)
      Imai Takao、Okumura Tomoko、Sato Takashi、Takeda Noriaki、Ohta Yumi、Okazaki Suzuyo、Inohara Hidenori
    • Journal Title

      Frontiers in Neurology

      Volume: 10 Pages: 1-9

    • DOI

      10.3389/fneur.2019.00304

    • NAID

      120006869518

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Change in endolymphatic hydrops 2 years after endolymphatic sac surgery evaluated by MRI.2018

    • Author(s)
      Higashi-Shingai K, Imai T, Okumura T, Uno A, Kitahara T, Horii A, Ohta Y, Osaki Y, Sato T, Okazaki S, Kamakura T, Takimoto Y, Ozono Y, Watanabe Y, Imai R, Hanada Y, Ohata K, Oya R, Inohara H
    • Journal Title

      Auris Nasus Larynx

      Volume: 46 Issue: 3 Pages: 335-345

    • DOI

      10.1016/j.anl.2018.10.011

    • NAID

      130007921171

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Three-dimensional analysis of the vestibulo-ocular reflex and the ability to distinguish the direction of centripetal acceleration in humans during eccentric rotation with the right ear facing downwards.2018

    • Author(s)
      Jiang X, Imai T, Okumura T, Ohta Y, Osaki Y, Sato T, Inohara H
    • Journal Title

      Neurosci Res

      Volume: 未定 Pages: 0168-0102

    • DOI

      10.1016/j.neures.2018.09.001

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Recovery of positional nystagmus after benign paroxysmal positional vertigo fatigue.2018

    • Author(s)
      Imai T, Okumura T, Nishiike S, Takeda N, Ohta Y, Osaki Y, Sato T, Inohara H
    • Journal Title

      Eur Arch Otorhinolaryngol

      Volume: 275(12) Issue: 12 Pages: 2967-2973

    • DOI

      10.1007/s00405-018-5165-3

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Unilateral posterior canal-plugging surgery for intractable bilateral posterior canal-type benign paroxysmal positional vertigo2017

    • Author(s)
      Hotta S, Imai T, Higashi-Shingai K, Okazaki S, Okumura T, Uno A, Ohta Y, Morihana T, Sato T, Inohara H
    • Journal Title

      Auris Nasus Larynx

      Volume: 印刷中 Issue: 5 Pages: 540-547

    • DOI

      10.1016/j.anl.2016.11.010

    • Related Report
      2017 Research-status Report
  • [Journal Article] Three-dimensional analysis of linear vestibulo-ocular reflex in humans during eccentric rotation while facing downwards2017

    • Author(s)
      Imai Takao、Takimoto Yasumitsu、Takeda Noriaki、Okumura Tomoko、Inohara Hidenori
    • Journal Title

      Experimental Brain Research

      Volume: 235 Issue: 8 Pages: 2575-2590

    • DOI

      10.1007/s00221-017-4990-8

    • Related Report
      2017 Research-status Report
  • [Journal Article] Evaluation of endolymphatic hydrops using 3-T MRI after intravenous gadolinium injection2017

    • Author(s)
      Imai Takao、Uno Atsuhiko、Kitahara Tadashi、Okumura Tomoko、Horii Arata、Ohta Yumi、Sato Takashi、Okazaki Suzuyo、Kamakura Takefumi、Ozono Yoshiyuki、Watanabe Yoshiyuki、Hanada Yukiko、Imai Ryusuke、Ohata Kazuya、Inohara Hidenori
    • Journal Title

      European Archives of Oto-Rhino-Laryngology

      Volume: 274 Issue: 12 Pages: 4103-4111

    • DOI

      10.1007/s00405-017-4739-9

    • Related Report
      2017 Research-status Report
  • [Presentation] 内耳造影MRIでの水腫の有無とめまい発作時の眼振の性状からの内リンパ水腫の分類2019

    • Author(s)
      今井貴夫
    • Organizer
      第29回日本耳科学会学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] シンポジウム 「基礎研究の将来展望」 新しいめまい治療法の開発のためのマウスの前庭動眼反射、視運動性眼球運動解析2018

    • Author(s)
      今井貴夫
    • Organizer
      第77回日本めまい平衡医学会総会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 3テスラMRIにて評価した内リンパ嚢開放術の術前後の内リンパ水腫の変化2017

    • Author(s)
      今井貴夫、真貝佳代子、奥村朋子、宇野敦彦、北原糺、堀井新、太田有美、大﨑康宏、佐藤崇、鎌倉武史、大薗芳之、猪原秀典
    • Organizer
      第27回日本耳科学会総会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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