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Rational design of peptidomimetic inhibitors for posttranslational lipdation of K-Ras

Research Project

Project/Area Number 20K21248
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 37:Biomolecular chemistry and related fields
Research InstitutionShinshu University

Principal Investigator

Ohkanda Junko  信州大学, 学術研究院農学系, 教授 (50233052)

Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
KeywordsKRas / 脂質修飾 / dual阻害剤 / ペプチドミメティクス / たんぱく質間相互作用 / 中分子 / ファルネシル転移酵素 / ゲラニルゲラニル転移酵素 / 2座型化合物 / 抗がん剤 / 翻訳後脂質修飾酵素
Outline of Research at the Start

難治がん医療の進展は現代社会に生きる我々の切実な願いである。本研究では、難治がん因子のK-Rasの特奇な脂質翻訳後修飾に着目し、これに関わるFTaseとGGTase Iに対するdual阻害剤を、K-Ras C端の天然非構造領域(IDP)の化学構造に基づいた合理設計により創出する。K-RasのCVIM部分の模倣には、最近申請者が開発に成功したピペリジン含有擬似ペプチドを用いる。生物実験によりK-Ras脂質修飾および増殖シグナルに対する化合物の阻害活性を検証し、新規作用機序に基づくK-Ras標的型抗がん剤の開発ならびにIDPのたんぱく質間相互作用(PPIs)を標的とする阻害剤戦略の確立を目指す。

Outline of Final Research Achievements

KRas mutant cancer, which is an advanced intractable cancer, accounts for about 20% of cancer patients in Japan and the development of effective therapeutic agents is urgently needed. In this study, we focused on the posttranslational lipid modification essential for KRas activation, and rationally designed bivalent mid-sized compound that simultaneously recognize both active site and the PPI interface between KRas and farnesyltransferase and Type-1 geranylgeranyltransferase. Structure-Activity-Relationship study resulted in a compound which showed low nanomolar inhibition activity both farnesylation and geranylgeranylation of C-terminus of KRas. Furthermore, cell-based evaluation indicated that compound suppress cell proliferation effectively. These results may open a way toward a new molecular strategy against KRas inactivation targeting its posttranslational modification.

Academic Significance and Societal Importance of the Research Achievements

進行性難治がんであるKRas変異がんは国内のがん患者数の約20%を占めると推測されており、効果的な治療薬の開発が望まれている。最近認可されたKRasコバレント阻害剤は適用範囲が限られており、新たな切り口による分子戦略が求められている。本研究のコンセプトはKRasそのものを標的とする従来の創薬戦略と異なりKRasの脂質修飾に関わるたんぱく質間相互作用を標的とする点で独自性があるうえ、本研究により既存の阻害剤を凌駕する高活性化合物が得られた成果は、KRas標的型抗がん剤の新たな設計指針を提案し進行性難治癌医療の発展に資する知見を提供するものと考えられる点で学術的および社会的な意義がある。

Report

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

    (10 results)

All 2021 2020 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Book (1 results) Remarks (3 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Design, synthesis, and functional evaluation of triazine-based bivalent agents that simultaneously target the active site and hot spot of phosphatase Cdc25B2021

    • Author(s)
      Nagaoka Yosei、Parvatkar Prakash、Hirai Go、Ohkanda Junko
    • Journal Title

      Bioorganic & Medicinal Chemistry Letters

      Volume: 48 Pages: 128265-128265

    • DOI

      10.1016/j.bmcl.2021.128265

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Design, synthesis, and evaluation of non-thiol bivalent dual inhibitors for KRas lipid modification2021

    • Author(s)
      堀内 直己、杉野 文俊、大神田 淳子
    • Organizer
      Pacifichem 2021(Hawai USA)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ピペリジン含有KRas脂質修飾阻害剤の合理設計と活性評価2021

    • Author(s)
      堀内直己、杉野文俊、大神田淳子
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] A rational approach for disrupting posttranslational lipid modification of K-Ras2021

    • Author(s)
      Junko Ohkanda
    • Organizer
      第18回赤堀コンファレンス
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] アカデミアで取り組む薬剤の設計戦略2020

    • Author(s)
      大神田 淳子
    • Organizer
      ペインクリニック学会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Book] "Chemical Approach Toward Controlling of Transient Protein Interaction" In Middle Molecular Strategy2021

    • Author(s)
      Junko Ohkanda
    • Publisher
      Springer Nature, Singapore,
    • ISBN
      9789811624575
    • Related Report
      2021 Annual Research Report
  • [Remarks] THE OHKANDA RESEARCH LAB

    • URL

      http://www.shinshu-u.ac.jp/faculty/agriculture/lab/johkanda/index.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] 特集連動◎KRASを標的とした薬剤開発競争の幕開け

    • URL

      https://bio.nikkeibp.co.jp/atcl/news/p1/21/08/12/08480/

    • Related Report
      2021 Annual Research Report
  • [Remarks] THE OHKANDA RESEARCH LAB/CHEMICAL BIOLOGY LAB

    • URL

      http://www.shinshu-u.ac.jp/faculty/agriculture/lab/johkanda/index.html

    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] ピペリジン化合物およびその用途2020

    • Inventor(s)
      大神田淳子
    • Industrial Property Rights Holder
      大神田淳子
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-135094
    • Filing Date
      2020
    • Related Report
      2020 Research-status Report

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Published: 2020-08-03   Modified: 2023-01-30  

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