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The mechanism remotely controlling Notch signaling through hemocytes

Research Project

Project/Area Number 18K14697
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 44010:Cell biology-related
Research InstitutionOsaka University

Principal Investigator

Yamakawa Tomoko  大阪大学, 理学研究科, 助教 (20645402)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsNotchシグナル / 血球細胞 / 貪食細胞 / レポーターアッセイ / 移植実験 / 貪食細胞の移植 / 小胞体 / Notchシグナル伝達
Outline of Final Research Achievements

Notch signaling regulates various cell differentiation in multi-cellular organisms and its defects cause serious diseases such as cancer or neurodegeneration. Whereas the intracellular mechanisms controlling Notch signaling has well-established, little was understood about the controls received from outside the cell.
We discovered that Drosophila pecanex (pcx) was specifically essential for the ER morphogenesis within hemocytes. We also found that when pcx mutations occur in hemocytes, they newly acquire an ability to secrete Notch signaling inhibitors.

Academic Significance and Societal Importance of the Research Achievements

大腸がんや乳がんといった一部のがん組織では、Notchシグナルの異常な亢進が認められており、Notchシグナルを抑制することでがん細胞の増殖を抑えられることが報告されている。したがって、Notchシグナルの抑制は、がんに対する新たな治療薬の開発という観点からも重要な課題である。本研究では、pecanex遺伝子の突然変異によって、血球細胞がNotchシグナル抑制因子を分泌する能力を獲得するという、新たな細胞シグナル破綻メカニズムを確立した。このNotchシグナル抑制因子はがんに対する新たな治療戦略としての可能性が期待できる。

Report

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

    (8 results)

All 2022 2021 2020 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results)

  • [Journal Article] Insight into Notch Signaling Steps That Involve pecanex from Dominant-Modifier Screens in Drosophila.2018

    • Author(s)
      Yamakawa T, Atsumi Y, Kubo S, Yamagishi A, Morita I, Matsuno K.
    • Journal Title

      Genetics.

      Volume: 209 Pages: 1099-1119

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] A neomorphic inhibitor secreted from pecanex mutant macrophages remotely suppresses Notch signaling2022

    • Author(s)
      Tomoko Yamakawa
    • Organizer
      IPR International Seminar Towards controlling the Notch signaling pathway
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A neomorphic inhibitor secreted from pecanex mutant macrophages remotely suppresses Notch signaling2021

    • Author(s)
      Tomoko Yamakawa
    • Organizer
      The 14th Japan Drosophila Research Conference
    • Related Report
      2021 Annual Research Report
  • [Presentation] A neomorphic inhibitor secreted from pecanex mutant macrophages remotely suppresses Notch signaling2021

    • Author(s)
      Tomoko Yamakawa
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The cell-type specific functions of an ER modulating factor, Pecanex in Notch and Wnt signaling pathways2021

    • Author(s)
      Tomoko Yamakawa
    • Organizer
      Wnt研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] A neomorphic inhibitor secreted from pecanex mutant phagocytes remotely suppresses Notch signaling2020

    • Author(s)
      Tomoko Yamakawa
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A neomorphic inhibitor secreted from pecanex mutant phagocytes remotely suppresses Notch signaling2020

    • Author(s)
      Tomoko Yamakawa
    • Organizer
      53rd JSDB/APDBN Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 血球細胞を介したNotchシグナル伝達の遠隔制御メカニズム2018

    • Author(s)
      山川 智子
    • Organizer
      日本発生生物学会秋季シンポジウム
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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