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generation of inner ear supporting cells from human iPS cells

Research Project

Project/Area Number 19K09914
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Fukunaga Ichiro  順天堂大学, 大学院医学研究科, 非常勤助教 (20746581)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords内耳 / 遺伝性難聴 / コネキシン26 / ギャップ結合 / iPS細胞 / ヒトiPS細胞 / 内耳細胞 / Connexin26 / GJB2
Outline of Research at the Start

遺伝性難聴は1600出生に1人と高頻度で発症し、聴覚と言語発育に著しい障害を引き起こすため極めて高度なQOLの低下をもたらす。現在までに原因となる遺伝子は100種類以上が同定されているが、遺伝性難聴の根本的な治療法は開発されていない。
本研究課題では、①ヒトiPS細胞から蝸牛支持細胞への分化誘導法の開発、②患者由来iPS細胞から難聴疾患モデル細胞の作製、③ゲノム編集による変異の修復を行い、申請者らの目標である、『遺伝性難聴の根本的な治療法の開発』に応用可能な細胞の作製を目的とする。

Outline of Final Research Achievements

In this study, we generated inner ear supporting cells that construct connexin 26 (CX26) gap junctions from human iPS cells. These cells formed CX26-positive gap junction plaques in the cell-cell border. In addition, as a result of immunostaining and gene expression analysis, these cells expressed the combination of markers observed in inner ear supporting cells. In addition, cell-cell communication was observed by the Dye transfer assay, and it was clarified that it had the same functionality as inner ear supporting cells.

Academic Significance and Societal Importance of the Research Achievements

GJB2遺伝子を原因とする難聴は変異によって軽度~高度難聴までバリエーションがあることが報告されている。本研究課題を達成することで、GJB2遺伝子の異なる変異が聴力の病態に与える影響を解明することができ、変異の種類に対応した治療法を立てることができる。また、GJB2変異難聴だけでなく、蝸牛の非感覚領域の細胞を対象とした遺伝性難聴のIn vitroモデルを作製することが可能となる。これらのモデルは、遺伝性難聴を含めた内耳性難聴に対する病態解析、薬剤スクリーニング、細胞治療、遺伝子治療への応用が期待できる。

Report

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

    (8 results)

All 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Modeling Gap junction beta 2 gene-related deafness with human iPS2021

    • Author(s)
      Ichiro Fukunaga, Yoko Oe, Keiko Danzaki, Sayaka Ohta, Cheng Chen, Kyoko Shirai, Atsushi Kawano, Katsuhisa Ikeda, Kazusaku Kamiya
    • Journal Title

      Human Molecular Genetics

      Volume: 30 Issue: 15 Pages: 1429-1442

    • DOI

      10.1093/hmg/ddab097

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Activin/Nodal/TGF-β Pathway Inhibitor Accelerates BMP4-Induced Cochlear Gap Junction Formation During in vitro Differentiation of Embryonic Stem Cells2021

    • Author(s)
      Ichiro Fukunaga, Yoko Oe, Cheng Chen, Keiko Danzaki, Sayaka Ohta, Akito Koike, Katsuhisa Ikeda, Kazusaku Kamiya
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 21 Pages: 1-12

    • DOI

      10.3389/fcell.2021.602197

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of two iPSC lines from siblings of a homozygous patient with hearing loss and a heterozygous carrier with normal hearing carrying p.G45E/Y136X mutation in GJB22021

    • Author(s)
      Fukunaga Ichiro、Oe Yoko、Danzaki Keiko、Ohta Sayaka、Chen Cheng、Iizumi Madoka、Shiga Takahiro、Matsuoka Rina、Anzai Takashi、Hibiya-Motegi Remi、Tajima Shori、Ikeda Katsuhisa、Akamatsu Wado、Kamiya Kazusaku
    • Journal Title

      Stem Cell Research

      Volume: 53 Pages: 102290-102290

    • DOI

      10.1016/j.scr.2021.102290

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of two induced pluripotent stem cell lines from PBMCs of siblings carrying c.235delC mutation in the GJB2 gene associated with sensorineural hearing loss2020

    • Author(s)
      Fukunaga Ichiro、Shirai Kyoko、Oe Yoko、Danzaki Keiko、Ohta Sayaka、Shiga Takahiro、Chen Cheng、Ikeda Katsuhisa、Akamatsu Wado、Kawano Atsushi、Kamiya Kazusaku
    • Journal Title

      Stem Cell Research

      Volume: 47 Pages: 101910-101910

    • DOI

      10.1016/j.scr.2020.101910

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of the induced pluripotent stem cell (hiPSC) line (JUFMDOi004-A) from a patient with hearing loss carrying GJB2 (p.V37I) mutation2020

    • Author(s)
      Fukunaga Ichiro、Shiga Takahiro、Chen Cheng、Oe Yoko、Danzaki Keiko、Ohta Sayaka、Matsuoka Rina、Anzai Takashi、Hibiya-Motegi Remi、Tajima Shori、Ikeda Katsuhisa、Akamatsu Wado、Kamiya Kazusaku
    • Journal Title

      Stem Cell Research

      Volume: 43 Pages: 101674-101674

    • DOI

      10.1016/j.scr.2019.101674

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of Functional CX26?Gap‐Junction‐Plaque‐Forming Cells with Spontaneous Ca 2+ Transients via a Gap Junction Characteristic of Developing Cochlea2019

    • Author(s)
      Fukunaga Ichiro、Fujimoto Ayumi、Hatakeyama Kaori、Kurebayashi Nagomi、Ikeda Katsuhisa、Kamiya Kazusaku
    • Journal Title

      Current Protocols in Stem Cell Biology

      Volume: 51 Issue: 1

    • DOI

      10.1002/cpsc.100

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] SFEBq培養におけるConnexin26を指標とした培養条件の検討と内耳細胞への分化誘導2020

    • Author(s)
      福永一朗
    • Organizer
      日本再生医療学会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 内耳前駆細胞の作製法2021

    • Inventor(s)
      福永一朗, 神谷和作
    • Industrial Property Rights Holder
      順天堂大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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