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The mechanism of patterning of the bifurcated bone formed by linear collagen crystals

Research Project

Project/Area Number 19K16142
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionKyoto University (2021)
Osaka University (2019-2020)

Principal Investigator

Kuroda Junpei  京都大学, 理学研究科, 特定研究員 (80726521)

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 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsコラーゲン / 細胞外マトリックス / 骨 / ゼブラフィッシュ / 間葉系細胞 / 骨芽細胞 / 鰭 / 骨形成
Outline of Research at the Start

魚のヒレ骨は、主に3つの過程を経て形成される。①ヒレの先端にアクチノトリキアと呼ばれるコラーゲンの針状結晶が均一に分布する、②それらを柱状に束ねる、③その基部にリン酸カルシウムを沈着させる。ヒレ骨の配置は、アクチノトリキアの配置に依存し、ヒレ骨が2分岐するためには、②のアクチノトリキアを束ねる過程が重要である。そこで、②の工程を担う細胞群の挙動をin vitro, in vivoで解析することで、ヒレ骨のパターン形成機構を明らかにする。

Outline of Final Research Achievements

In this research project, I found that the physical effect of "bundling" actinotricia, which is a structure of collagen fibers distributed at the tip of the fin bone of zebrafish, is important for the formation of the branching pattern of the fin bone. In addition, the in vitro culture system that I developed revealed that the cells responsible for this "bundling" process are fin mesenchymal cells. Furthermore, by performing continuous electron microscopic observation around actinotricia in vivo using FIB-SEM, I elucidated the detailed 3D structure of mesenchymal cells that develop multiple filopodia and wrap around actinotricia.

Academic Significance and Societal Importance of the Research Achievements

形態形成の問題を扱う従来の発生生物学の研究は、基本的には遺伝子変異をベースにしたものが中心であったが、研究代表者は、もっと物理的な作用が骨の形態形成に関わる大きな要因であると考え、実際にアクチノトリキアを物理的な力で束ねる細胞を特定し、この作用が果たす役割について見出した。これまでこのような物理的な作用で、骨の形態形成を説明した例はほかになく、本研究成果が果たす学術的なインパクトは極めて大きいと考える。また魚類の対ヒレと他の脊椎動物の四肢は相同な器官であることから、本研究課題によって得られた知見は、脊椎動物全般の、骨の形態形成原理の理解に大いに貢献できると推測する。

Report

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

    (11 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (8 results)

  • [Journal Article] Mechanical role of actinotrichia in shaping the caudal fin of zebrafish2021

    • Author(s)
      Hibiki Nakagawa, Junpei Kuroda, Toshihiro Aramaki and Shigeru Kondo
    • Journal Title

      Developmental Biology

      Volume: 481 Pages: 52-63

    • DOI

      10.1016/j.ydbio.2021.09.003

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Physical Role of Mesenchymal Cells Driven by the Actin Cytoskeleton Is Essential for the Orientation of Collagen Fibrils in Zebrafish Fins2020

    • Author(s)
      Kuroda Junpei、Itabashi Takeshi、Iwane Atsuko H.、Aramaki Toshihiro、Kondo Shigeru
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 8

    • DOI

      10.3389/fcell.2020.580520

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Uptake of Osteoblast-Derived Extracellular Vesicles Promotes the Differentiation of Osteoclasts in the Zebrafish Scale2020

    • Author(s)
      Jingjing Kobayashi-Sun, Shiori Yamamori, Mao Kondo, Junpei Kuroda, Mika Ikegame, Nobuo Suzuki, Kei-Ichiro Kitamura, Atsuhiko Hattori, Masaaki Yamaguchi, Isao Kobayashi.
    • Journal Title

      Communications Biology

      Volume: 3 Issue: 1 Pages: 190-190

    • DOI

      10.1038/s42003-020-0925-1

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] The novel transporting system of the collagen fibers which play as scaffolds for fin bones formation in teleost fish.2021

    • Author(s)
      Junpei Kuroda, Shigeru Kondo.
    • Organizer
      第92回日本動物学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Morphogenesis of fin bones by the moving cells which translocate large collagen crystals.2021

    • Author(s)
      Junpei Kuroda, Hiromu Hino, Hibiki Nakagawa, Shigeru Kondo.
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Dynamics of collagen crystals essential for the construction of linear fin bones2020

    • Author(s)
      Junpei Kuroda, Takeshi Itabashi, Atsuko H Iwane, and Shigeru Kondo
    • Organizer
      第43回日本分子生物学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 魚類ヒレの骨格形成に必須なコラーゲン繊維の配向をつくり出す細胞依存的な新規メカニズム2020

    • Author(s)
      黒田純平, 板橋岳志, 岩根敦子, 近藤滋
    • Organizer
      第52回日本結合組織学会
    • Related Report
      2020 Research-status Report
  • [Presentation] The mechanism about the growth of collagen crystal involved with fin skeletal development.2019

    • Author(s)
      Junpei Kuroda, Takeshi Itabashi, Atsuko H Iwane, Toshihiro Aramaki, Hibiki Nakagawa and Shigeru Kondo.
    • Organizer
      第52回日本発生生物学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Attempt to understand the cellular function during developmental process from 3D structural model2019

    • Author(s)
      Junpei Kuroda, Takeshi Itabashi, Takako M. Ichinose, Shigeru Kondo, Atsuko H Iwane
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] The mechanism about the growth of collagen crystal involved with fin skeletal development.2019

    • Author(s)
      Junpei Kuroda, Takeshi Itabashi, Atsuko H Iwane, and Shigeru Kondo.
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Role of collagen crystals as a scaffold for fin-ray bone formation.2019

    • Author(s)
      Kaho Tobiishi, Junpei Kuroda, Atsuko H Iwane, and Shigeru Kondo.
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report

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

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