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Comprehensive analysis of causative genes in cochlear implant patients and research on elucidation of clinical characteristics

Research Project

Project/Area Number 19K09885
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56050:Otorhinolaryngology-related
Research InstitutionShinshu University

Principal Investigator

MIYAGAWA Maiko  信州大学, 医学部, 特任講師 (60467165)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords難聴 / 遺伝子 / 人工内耳 / 補聴器 / 残存聴力活用型人工内耳 / 次世代シークエンサー
Outline of Research at the Start

本研究では、人工内耳や残存聴力活用型人工内耳を装用している、先天性・遅発性感音難 聴症例を対象に次世代シークエンサーを用いた既知難聴原因遺伝子の網羅的解析を行い、 (1)難聴の原因を明らかにする、(2)原因ごとの臨床的特徴(難聴の発症時期、進行 度など)を明らかにする、(3)原因に基づいて人工内耳の効果を予測することを目的とし た。本研究により原因遺伝子毎に臨床的特徴を明らかにすることで、内耳における各遺伝子 の機能的役割の推定が可能となると共に、人工内耳による効果が予測可能になるなど研究分 野の発展が期待される。

Outline of Final Research Achievements

Cochlear implantation (CI) is the most important and effective treatment for patients with profound sensorineural hearing loss. However, the outcomes of CI vary among patients. One of the reasons of this heterogeneous outcome for cochlear implantation is thought to be the heterogeneous nature of hearing loss. Indeed, genetic factors, the most common etiology in severe-to-profound hearing loss, might be one of the key determinants of outcomes for CI and electric acoustic stimulation (EAS). The patients with genetic causes involving an “intra-cochlear” etiology showed good CI/EAS outcomes. In this study, we performed next-generation sequencing analysis for CI patients and identified genetic cause. We also analyzed CI outcome for each gene. The date obtained in this study will be useful to select more appropriate clinical treatment based on genetic diagnosis.

Academic Significance and Societal Importance of the Research Achievements

本研究により原因遺伝子毎の人工内耳の効果を明らかにすることができた。特に症例数の多かったCDH23遺伝子に関しては、人工内耳の装用効果が良好であったが、補聴器装用症例に関しては元の聴力閾値により、改善がやや不十分な症例もあった。今回の研究で得られたデータは、人工内耳や補聴器の治療効果の予測に有用な情報であり、特に補聴器での改善が不十分な症例に関しては人工内耳の検討を勧める根拠となる有用なデータが得られた。今後、治療法の選択などの際に活用されることで難聴患者のQOL向上に有益であると考えている。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2022 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (4 results)

  • [Journal Article] Variants in CDH23 cause a broad spectrum of hearing loss:from nonsyndromic to syndromic hearing loss as well as from congenital to age‑related hearing loss.2022

    • Author(s)
      Usami SI, Isaka Y, Miyagawa M, Nishio SY.
    • Journal Title

      Hum Genet.

      Volume: 141 Issue: 3-4 Pages: 903-914

    • DOI

      10.1007/s00439-022-02431-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cochlear Implantation From the Perspective of Genetic Background.2020

    • Author(s)
      Usami SI, Nishio SY, Moteki H, Miyagawa M, Yoshimura H.
    • Journal Title

      Anat Rec.

      Volume: 303 Issue: 3 Pages: 563-593

    • DOI

      10.1002/ar.24360

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Genetic testing has the potential to impact hearing preservation following cochlear implantation2020

    • Author(s)
      Yoshimura Hidekane、Moteki Hideaki、Nishio Shin-ya、Miyajima Hiroki、Miyagawa Maiko、Usami Shin-ichi
    • Journal Title

      Acta Oto-Laryngologica

      Volume: 5 Issue: 6 Pages: 1-7

    • DOI

      10.1080/00016489.2020.1730439

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clinical Characteristics and In Vitro Analysis of MYO6 Variants Causing Late-Onset Progressive Hearing Loss.2020

    • Author(s)
      Oka SI, Day TF, Nishio SY, Moteki H, Miyagawa M, et al
    • Journal Title

      Genes

      Volume: 11 Issue: 3 Pages: 273-273

    • DOI

      10.3390/genes11030273

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comprehensive analysis of syndromic hearing loss patients in Japan2019

    • Author(s)
      Ideura Michie、Nishio Shin-ya、Sugahara Kazuma、他
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 11976-11976

    • DOI

      10.1038/s41598-019-47141-4

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] LENA(Language Environment Analysis)を用いたリハビリテーション、親指導ができた2症例2022

    • Author(s)
      宮川麻衣子、前田菜々子、西尾信哉、宇佐美真一
    • Organizer
      第67回日本聴覚医学会・学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] LENAシステムを用いた「家庭での語りかけの数」の評価と人工内耳装用効果の関係2020

    • Author(s)
      宮川麻衣子、前田菜々子、西尾信哉、北野庸子、宇佐美真一
    • Organizer
      第65回日本聴覚医学会学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 長野県における新生児聴覚スクリーニングの現状と遠隔リハビリを組み合わせた難聴児支援2019

    • Author(s)
      宮川麻衣子、北野庸子、西尾信哉、宇佐美真一
    • Organizer
      第64回日本聴覚医学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Hearing preservation cochlear implant surgery based on genetic testing.2019

    • Author(s)
      Yoshimura H, Moteki H, Nishio SY, Miyagawa M, Usami SI
    • Organizer
      Collegium Oto-Rhino-Laryngologium
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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