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Organ function compensation and elucidation of its mechanism

Research Project

Project/Area Number 21K19265
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionNara Institute of Science and Technology

Principal Investigator

Matsui Takaaki  奈良先端科学技術大学院大学, 先端科学技術研究科, 准教授 (60403333)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords器官形成 / 機能獲得 / 機能調節 / ゼブラフィッシュ / 器官サイズ / 器官機能 / 左右差
Outline of Research at the Start

多細胞生物の器官サイズは細胞数と細胞サイズの総和で決まる。しかし、遺伝的異常、生理的・外因的撹乱によって細胞の数が減少した場合、残存する細胞が肥大化することで器官サイズを通常時と変わらないように維持するサイズ補償作用が存在することが知られている。しかし最近研究代表者は、ゼブラフィッシュの内臓の左右非対称な配置を規定する器官(クッペル胞)において、サイズ補償は起こらず、むしろ、器官サイズの違いを許容し、機能を補償する新たな生理現象の存在を発見した。本研究では、遺伝学的な解析、レーザー光学的解析、および数理解析を組み合わせた融合研究を展開し、クッペル胞の機能補償作用の仕組みの理解を目指す。

Outline of Final Research Achievements

The number of cells and cell size determines the organ size of multicellular organisms. When cell number decreases due to genetic or other abnormalities, remaining cells enlarge and the organ size returns to normal. However, I analyzed the mechanism of size control of Kupffer's vesicle (KV) that regulates left-right asymmetry in zebrafish. I found that KV allows size variation and compensates for the function. Here I additionally revealed that size-dependent turbulence generation of KV is involved in its dysfunction and that ATAT1 is involved in the functional compensation.

Academic Significance and Societal Importance of the Research Achievements

機能補償作用のしくみを理解することは、これまでの器官サイズ制御に対する定説を覆し、新たな制御機構の発見の可能性を秘めている。そのため本研究の成果は、クッペル胞での機能補償のしくみの解明することで、今後、その他の器官、動物種へ研究を拡大して、器官の機能補償作用の特異性・普遍性を解明していくことに繋がる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Zero-shot reconstruction of mutant spatial transcriptomes2022

    • Author(s)
      Okochi Yasushi、Matsui Takaaki、Naoki Honda
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2022.12.16.520397

    • Related Report
      2022 Research-status Report
  • [Journal Article] Calcium wave propagation during cell extrusion2022

    • Author(s)
      Matsui Takaaki
    • Journal Title

      Current Opinion in Cell Biology

      Volume: 76 Pages: 102083-102083

    • DOI

      10.1016/j.ceb.2022.102083

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Ca2+ wave generates a force during cell extrusion in zebrafish.2021

    • Author(s)
      Yamada S, Bessho Y, Fujita Y, Hosokawa Y, Matsui T
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2021.07.14.452309

    • Related Report
      2021 Research-status Report
  • [Journal Article] Pulsed laser activated impulse response encoder (PLAIRE): sensitive evaluation of surface cellular stiffness on zebrafish embryos2021

    • Author(s)
      Yasukuni Ryohei、Minamino Daiki、Iino Takanori、Araki Takashi、Takao Kohei、Yamada Sohei、Bessho Yasumasa、Matsui Takaaki、Hosokawa Yoichiroh
    • Journal Title

      Biomedical Optics Express

      Volume: 12 Issue: 3 Pages: 1366-1366

    • DOI

      10.1364/boe.414338

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Mechanism of apoptotic cell extrusion in zebrafish2022

    • Author(s)
      Takaaki Matsui
    • Organizer
      17th International Zebrafish Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 動物におけるショートレンジの情報伝播による変異細胞の排除2021

    • Author(s)
      松井貴輝
    • Organizer
      第44回日本分子生物学会
    • Related Report
      2021 Research-status Report
  • [Presentation] ゼブラフィッシュ左右差形成におけるatat1 の役割2021

    • Author(s)
      吉田 調、秋山 隆太郎、別所 康全、白水 崇、 西村 有平、松井 貴輝
    • Organizer
      第7回ゼブラフィッシュ・メダカ創薬研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] A role of hair cell function in homeostasis of the lateral line neuromast2021

    • Author(s)
      Yamamoto H., Akiyama R., Bessho Y., Matsui T.
    • Organizer
      27th Japanese Medaka and Zebrafish Meeting
    • Related Report
      2021 Research-status Report
  • [Presentation] Functional analyses of atat1 in zebrafish2021

    • Author(s)
      Yoshida S., Akiyama R., Bessho Y., Shiromizu T., Nishimura Y., Matsui T.
    • Organizer
      27th Japanese Medaka and Zebrafish Meeting
    • Related Report
      2021 Research-status Report

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Published: 2021-07-13   Modified: 2025-01-30  

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