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Formation mechanism of the "cut here line" across multiple segments in insect cuticle

Research Project

Project/Area Number 18K06243
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kojima Tetsuya  東京大学, 大学院新領域創成科学研究科, 准教授 (80262153)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords昆虫 / クチクラ / 切取り線 / 囲蛹殻 / 羽化 / 脱皮 / Notch / Gld / thawb / ショウジョウバエ
Outline of Final Research Achievements

During a molt or eclosion of arthropods, including insects, the old cuticle is cleaved not randomly but at the “cut here line”, a predefined line on the cuticle. In Drosophila melanogaster, the third instar larval cuticle transforms into the puparium, which encloses the pupa, and the operculum ridge (OR) serves as the "cleavage line" that is cleaved during eclosion. Through the analysis of the structure of OR and the role of Notch signaling in its formation, we found that Notch signaling plays a key role in the formation of OR by controlling the formation of the specialized structure at the future OR region, maturation of the future OR region to OR through activation of Glucose dehydrogenase, and regulation of the elongated shape of OR-forming cells.

Academic Significance and Societal Importance of the Research Achievements

クチクラの「切取り線」は、節足動物にとって生存に必須であるにもかかわらず、これまでほとんど研究されてこなかった。本研究成果は、「切取り線」の詳細な構造や形成過程、および、形成メカニズムについての分子レベルでの初めての研究となる。
「切取り線」は鋏角類、多足類、甲殻類、昆虫類などの節足動物の大きな分類ごとにそれぞれ決まった位置に形成され、さらに個々の種によってもその位置は細かく異なっている。したがって、本研究成果を基に他の昆虫や節足動物の「切取り線」についての研究をすることで、「切取り線」の一般的な理解だけでなく、「切取り線」の進化を通じた節足動物全般の進化過程の理解にもつながると期待される。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020 2019 2018

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] A corset function of exoskeletal ECM promotes body elongation in Drosophila.2021

    • Author(s)
      Tajiri, R., Fujiwara, H., Kojima, T.
    • Journal Title

      Communications Biology

      Volume: 4 Issue: 1 Pages: 1-13

    • DOI

      10.1038/s42003-020-01630-9

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Characteristic structure of the "cut here line" on the cuticle and its formation by Notch signaling2022

    • Author(s)
      Tetsuya Kojima
    • Organizer
      The 45th Annual Meeting of the Molecular Biology Society of Japan
    • Related Report
      2022 Annual Research Report
  • [Presentation] Formation of the "cut here line" on the cuticle by Notch signaling2022

    • Author(s)
      Tetsuya Kojima
    • Organizer
      Institute for Protein Research (IPR) International Seminar “Towards controlling the Notch signaling pathway”
    • Related Report
      2022 Annual Research Report
  • [Presentation] Notchシグナルによるクチクラの「切取り線」形成メカニズム2021

    • Author(s)
      小嶋徹也
    • Organizer
      Notch研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] Mechanism for shaping the tarsal segment of the adult leg in Drosophila2020

    • Author(s)
      Shotaro Hiraiwa, Ryuhei Hayashi, Koyo Suzuki, Reiko Tajiri and Tetsuya Kojima
    • Organizer
      5th Asia Pacific Drosophila Research Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ショウジョウバエ囲蛹殻におけるoperculum ridge形成に関わる分子機構の解析2019

    • Author(s)
      貝原 侑弥、平野 彩花、田尻 怜子、小嶋 徹也
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] ショウジョウバエ囲蛹殻の「切取り線」である operculum ridge の形成メカニズム2018

    • Author(s)
      平野 彩花・田尻 怜子・小嶋 徹也
    • Organizer
      第54回日本節足動物発生学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Mechanism for shaping the tarsal segment of the adult leg in Drosophila2018

    • Author(s)
      Ryuhei Hayashi, Koyo Suzuki , Reiko Tajiri and Tetsuya Kojima
    • Organizer
      the 13th Japanese Drosophila Research Conference
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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