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Evolutionary embryology of the physiological environment in which the hair cells responsible for hearing are located

Research Project

Project/Area Number 20K15830
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 44040:Morphology and anatomical structure-related
Research InstitutionKobe University (2022)
Hiroshima University (2020-2021)

Principal Investigator

Higuchi Shinnosuke  神戸大学, 附属学校部, 附属中等教育学校教諭 (20847131)

Project Period (FY) 2020-04-01 – 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 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords有毛細胞 / 平衡感覚 / 膜迷路 / 感覚毛 / 進化 / 内リンパ / 血管条 / 内耳 / 聴覚器
Outline of Research at the Start

脊椎動物において聴覚と平衡覚を担う感覚器である内耳は,蝸牛管や三半規管など複雑な形態をもつ膜迷路が内リンパという細胞外液で満たされ,そこに感覚有毛細胞が配置された構造をしている。内リンパは特殊な電気化学的組成をもち,有毛細胞が機械刺激を受容するために不可欠な生理学的環境を提供する。ただし,内耳の機能に欠かせない内リンパがいかに獲得され,進化してきたかは未解明である。そこで本研究では,感覚器としての内耳の機能に必須な内リンパについて進化発生学的に探究する。

Outline of Final Research Achievements

The inner ear, the sensory organ responsible for hearing and balance in vertebrates, consists of a complex labyrinth of membranes, including the cochlear duct and semicircular canals, filled with an extracellular fluid called endolymph that contains sensory hair cells. The endolymph has a specialized electrochemical composition and provides the physiological environment essential for the reception of mechanical stimuli by the hair cells. However, how the endolymph, which is essential for inner ear function, has been acquired and evolved throughout vertebrate history is not yet understood. In this study, we investigated the endolymph, which is essential for the function of the inner ear as a sensory organ, from an evolutionary developmental perspective.

Academic Significance and Societal Importance of the Research Achievements

本研究の遂行は、脊椎動物における聴覚器の進化の解明につながる。本研究の主要な対象である鳥類の内耳については、哺乳類のものにくらべて著しく研究の進展が遅い。本研究のように様々な動物での知見を比較することによって、我々ヒトをはじめ動物がどのように世界の有様を認知しているのかを深く探求することができる。また、ヒトの疾患研究のためにゼブラフィッシュやマウスにおいて聴平衡覚の疾患モデルが作製されており、本研究の成果を関連研究の推進に還元できる可能性がある。

Report

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

    (6 results)

All 2023 2022 2021 2020

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (3 results) (of which Invited: 1 results)

  • [Journal Article] The unicellular green alga Chlorogonium capillatum as a live food promotes the growth and survival of Artemia larvae2023

    • Author(s)
      Nishida Yuki、Hoshina Ryo、Higuchi Shinnosuke、Suzaki Toshinobu
    • Journal Title

      Aquaculture

      Volume: 566 Pages: 739227-739227

    • DOI

      10.1016/j.aquaculture.2022.739227

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Thyroid and endostyle development in cyclostomes provides new insights into the evolutionary history of vertebrates2022

    • Author(s)
      Takagi Wataru、Sugahara Fumiaki、Higuchi Shinnosuke、Kusakabe Rie、Pascual-Anaya Juan、Sato Iori、Oisi Yasuhiro、Ogawa Nobuhiro、Miyanishi Hiroshi、Adachi Noritaka、Hyodo Susumu、Kuratani Shigeru
    • Journal Title

      BMC Biology

      Volume: 20 Issue: 1 Pages: 76-76

    • DOI

      10.1186/s12915-022-01282-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Novel developmental bases for the evolution of hypobranchial muscles in vertebrates2020

    • Author(s)
      Kusakabe Rie、Higuchi Shinnosuke、Tanaka Masako、Kadota Mitsutaka、Nishimura Osamu、Kuratani Shigeru
    • Journal Title

      BMC Biology

      Volume: 18 Issue: 1 Pages: 120-120

    • DOI

      10.1186/s12915-020-00851-y

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Runx2ミスセンス変異マウスにみられた歯根形態形成の異常2021

    • Author(s)
      樋口真之輔, 吉本由紀, 山家新勢、小守壽文, 宿南知佐
    • Organizer
      第39回日本骨代謝学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] nmdCreノックインマウスの作製とTnmd陽性細胞の系譜解析2021

    • Author(s)
      山家新勢, 吉本由紀, 樋口真之輔, 味八木茂, 宿南知佐
    • Organizer
      第39回日本骨代謝学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 頭蓋顔面領域におけるScx+/Sox9+細胞の局在と形態形成への寄与2021

    • Author(s)
      樋口真之輔, 川上良介, 山家新勢, 余昕怡, 今村健志, 宿南知佐
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2020-04-28   Modified: 2024-01-30  

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