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Development of a new anticancer drug using a protein that has high affinity and specifically binds to mutant Ras

Research Project

Project/Area Number 19K16828
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionGifu University

Principal Investigator

Honda Ryo  岐阜大学, 大学院連合創薬医療情報研究科, 准教授 (00820143)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsRAS / 抗がん剤 / 分子標的薬 / 細胞膜透過性タンパク質 / RAS阻害剤
Outline of Research at the Start

RAS遺伝子の変異は全がんの約20%に認められるが,変異型Rasタンパク質を阻害する分子標的薬はいまだにない.変異型Rasの分子表面には低分子化合物が結合できるポケット(鍵穴)がなく,従来の低分子創薬の手法では変異型Rasに高親和性かつ特異的に結合する薬剤を開発することは極めて困難である.そこで本研究では変異型Rasに高親和性かつ特異的に結合するタンパク質Xに着目し,これを細胞内に導入することで変異型Rasを阻害する手法を開発する.

Outline of Final Research Achievements

KRAS is one of the most important targets in cancer treatment. However, it has been considered as an undruggable target with conventional small molecules and antibodies. In this study, by synthesizing 51 fusion recombinant proteins. we succeeded in identifying a novel KRAS inhibitor with a micromolar inhibitory activity in cultured cell lines. The proteins consist of a RAS-binding protein with a cell-permeable peptide and thereby penetrates through the cell membrane. The best inhibitor shows an inhibitory activity comparable to that of existing small molecule RAS inhibitors, and thus can be considered as a promising lead for the development of new anticancer drugs (Cell Chemical Biology 2021, WO/2022/039026).

Academic Significance and Societal Importance of the Research Achievements

本研究で開発したRAS阻害剤の最大の特色は、従来の創薬分子や次世代医薬品のどれとも異なる「細胞膜透過性タンパク質」であるという点である。このため本剤は、分子量が1万Daを超える高分子量タンパク質であるにも関わらず、細胞膜を透過し、細胞内に存在するRASに到達し阻害することが可能である。このようなアプローチはKRASのみならず、他のundruggable targetにも応用することが期待できる。

Report

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

    (3 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Patent(Industrial Property Rights) (2 results) (of which Overseas: 1 results)

  • [Journal Article] Specific inhibition of oncogenic RAS using cell-permeable RAS-binding domains2021

    • Author(s)
      Nomura, T.K., Heishima, K., Sugito, N., Sugawara, R., Ueda, H., Akao, Y. and Honda, R.
    • Journal Title

      Cell Chemical Biology

      Volume: - Issue: 11 Pages: 1581-1589.e6

    • DOI

      10.1016/j.chembiol.2021.04.013

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Patent(Industrial Property Rights)] 人工タンパク質、Ras阻害剤及び抗がん剤2021

    • Inventor(s)
      本田諒、赤尾幸博
    • Industrial Property Rights Holder
      国立大学法人東海国立大学機構
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 人工タンパク質、Ras阻害剤及び抗がん剤2020

    • Inventor(s)
      本田諒、赤尾幸博
    • Industrial Property Rights Holder
      国立大学法人東海国立大学機構
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-137653
    • Filing Date
      2020
    • Related Report
      2020 Research-status Report

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

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