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The molecular analysis of the structural basis of Notch1/Dll4 interaction for drug discovery.

Research Project

Project/Area Number 20K07330
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionTokai University

Principal Investigator

Hozumi Katsuto  東海大学, 医学部, 教授 (30246079)

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: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsNotch / Dll4 / Dll1 / 胸腺 / Notchリガンド / 立体構造 / パイエル板 / Notch1 / 結合様式 / シミュレーション
Outline of Research at the Start

Notch系は、様々な細胞の分化制御を行う重要なシステムである。これまでもNotchシグナル阻害薬の開発が試みられてきたが、その多彩な機能ゆえ副作用が大きく、実用化は困難であった。本研究では、申請者が独自に見出したDll4/Notch1に特徴的な結合様式を標的として、新たにDll4/Notch1特異的に作用する小分子化合物を選定し、その効果を検証する。また、新たな結合様式を予測する。こうした研究を通して、Notch/NotchLの結合をアミノ酸残基レベルで理解し、小分子化合物によるNotchシグナルの効果的なin vivo制御法を提案する。

Outline of Final Research Achievements

To understand the characteristics of the binding between Dll4 and Notch1, we investigate the structure and function of the swapping chimeras of Dll1 and Dll4. Dll4 has unique two AA neighbored to DSL region, in addition to the use of MNNL region for its binding to Notch1. These must be main targets for the specific manipulation of Dll4/Notch1 binding.

Academic Significance and Societal Importance of the Research Achievements

Notchシステムは、腫瘍化をはじめ様々な生命現象に寄与するが、すべてのNotch/NotchLの機能を抑制することにより強い副作用が生じ、治療への応用が困難である。本研究では、代表的なNotchLであるDll4の特徴的構造およびその機能に着目し、Dll4の機能を特異的に抑制するための基礎となるNotch1との結合特性を明らかにした。

Report

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

    (5 results)

All 2023 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (1 results) (of which Invited: 1 results)

  • [Journal Article] Adherent-invasive E. coli-induced specific IgA limits pathobiont localization to the epithrlial niche in the gut.2023

    • Author(s)
      Tanaka R, Imai J, Tsugawa H, Eap KB, Yazawa M, Kaneko M, Ohno M, Sugihara K, Kitamoto S, Nagao-Kitamoto H, Barnich N, Matsushima M, Suzuki T, Kagawa T, Nishizaki Y, Suzuki H, Kamada N, Hozumi K
    • Journal Title

      Front in Microbiol

      Volume: 14 Pages: 1031997-1031997

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dll1 Can Function as a Ligand of Notch1 and Notch2 in the Thymic Epithelium2021

    • Author(s)
      Hirano KI, Hosokawa H, Yahata T, Ando K, Tanaka M, Imai J, Yazawa M, Ohtsuka M, Negishi N, Habu S, Sato T, Hozumi K.
    • Journal Title

      Front Immunol

      Volume: 13 Pages: 852427-852427

    • DOI

      10.3389/fimmu.2022.852427

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] LMO2 is essential to maintain the ability of progenitors to differentiate into T-cell lineage in mice2021

    • Author(s)
      Hirano K., Hosokawa H., Koizumi M., Endo Y., Yahata T., and Hozumi K
    • Journal Title

      eLife

      Volume: 10

    • DOI

      10.7554/elife.68227

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Notch signaling supports the appearance of follicular helper T cells in the Peyer's patches concomitantly with the reduction of regulatory T cells2021

    • Author(s)
      Yazawa M, Hosokawa H, Koizumi M, Hirano KI, Imai J, Hozumi K.
    • Journal Title

      Int Immunol

      Volume: 33(9) Issue: 9 Pages: 469-478

    • DOI

      10.1093/intimm/dxab032

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Dll1 and Dll4 differently require their extracellular domains for triggering Notch signaling in mice2020

    • Author(s)
      穂積勝人
    • Organizer
      日本分子生物学会
    • Related Report
      2020 Research-status Report
    • Invited

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

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