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Improvement of catalytic turnover based on transition state control of oligonucleotide template chemical reaction

Research Project

Project/Area Number 16KT0052
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund
Section特設分野
Research Field Transition State Control
Research InstitutionNagoya University

Principal Investigator

Abe Hiroshi  名古屋大学, 理学研究科, 教授 (80415067)

Co-Investigator(Kenkyū-buntansha) 木村 康明  名古屋大学, 理学研究科, 助教 (80769977)
Project Period (FY) 2016-07-19 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2017: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2016: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords核酸プローブ / 蛍光プローブ / 核酸鋳型反応 / 触媒回転数 / RNAプローブ / RNA / 鋳型反応 / DNA / 蛍光 / センサー / 遷移状態 / 触媒 / 増幅
Outline of Final Research Achievements

The fluorescence reaction based on the oligonucleotide (ON) template reaction is one of the most basic working principles of the RNA detection probe. In this method, an ON probe having a reactive functional group and an ON probe having a fluorescent precursor whose fluorescence is suppressed by a protecting group are associated on the target RNA, and then the protective group is removed and fluorescence signal is generated. Since this fluorescence reaction specifically occurs in the presence of target RNA, it can be the working principle RNA detection probe. In order to detect intracellular RNA highly sensitively, we worked on (1) accelerating ON template reaction and (2) development of a new method of intracellular administration of ON probe without lipofection. Prospective results were obtained in (1) by appropriately selecting the nucleophile for the reaction, and in (2) by use of phosphorothioate in the ON probe.

Academic Significance and Societal Importance of the Research Achievements

RNA検出法は、病気の診断、ウイルスの検出、細胞現象の解明など、様々な分野で重要な技術である。RNA検出では、いかに微量な標的RNAを検出できるか、すなわち検出感度の高感度化が重要な課題である。核酸検出プローブの作用原理である核酸鋳型反応の高速化により、高感度化が可能になるが、本研究ではその反応の高速化の指針を見出すことに成功した。また、核酸プローブの細胞投与において、既存の手法では望みでない蛍光シグナルを発してしまう問題があるが、本研究で開発した新たな投与法により、その問題を回避することが可能になった。両成果は、細胞内で微量なRNAの検出を可能にする技術の開発において重要な結果である。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • Research Products

    (3 results)

All 2019 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Disulfide-Unit Conjugation Enables Ultrafast Cytosolic Internalization of Antisense DNA and siRNA2019

    • Author(s)
      Shu Zhaoma、Tanaka Iku、Ota Azumi、Fushihara Daichi、Abe Naoko、Kawaguchi Saki、Nakamoto Kosuke、Tomoike Fumiaki、Tada Seiichi、Ito Yoshihiro、Kimura Yasuaki、Abe Hiroshi
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 印刷中 Issue: 20 Pages: 6611-6615

    • DOI

      10.1002/anie.201900993

    • NAID

      130007841763

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural optimization of pseudorotaxane-forming oligonucleotides for efficient and stable complex formation2018

    • Author(s)
      Onizuka Kazumitsu、Miyashita Takuya、Chikuni Tomoko、Ozawa Mamiko、Abe Hiroshi、Nagatsugi Fumi
    • Journal Title

      Nucleic Acids Research

      Volume: 46 Issue: 17 Pages: 8710-8719

    • DOI

      10.1093/nar/gky744

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 高効率な核酸検出を可能にする核酸鋳型反応の開発2017

    • Author(s)
      伊藤真央 柴田綾 阿部奈保子 木村康明 阿部洋
    • Organizer
      日本薬学会
    • Place of Presentation
      仙台
    • Year and Date
      2017-03-26
    • Related Report
      2016 Research-status Report

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Published: 2016-07-20   Modified: 2023-03-08  

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