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Elucidation of the mechanism of mutagenesis by transient nucleobase adducts

Research Project

Project/Area Number 19K22256
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 InstitutionOsaka University

Principal Investigator

KAWAI KIYOHIKO  大阪大学, 産業科学研究所, 准教授 (50314422)

Co-Investigator(Kenkyū-buntansha) 小阪田 泰子  大阪大学, 産業科学研究所, 准教授 (00579245)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
KeywordsDNA / 変異原 / 1分子検出 / アルコール / アセトアルデヒド / 1分子計測 / 次世代シークエンサー / 変異
Outline of Research at the Start

DNAに生じる傷は、DNAの情報が書き換わる原因となり(=変異)、発ガン、老化を引き起こします。本研究では、DNA傷の中でも、稀にしか現れず、かつ、短い時間しか存在しないような傷(=過渡核酸塩基付加体)に注目します。これまでは、調べる方法が無く良くわかっていなかった、過渡核酸塩基付加体が我々の発ガンや老化にどのように関わっているかを明らかにします。

Outline of Final Research Achievements

In this study, we aimed to gain insight into the formation of N2-ethylidene-G (ethG), a nucleic acid adduct transiently induced in the body by the ingestion of alcohol, a carcinogen. Using PacBio's RSII+ next-generation sequencer, we have successfully observed the formation of ethG in the presence of relatively high concentrations of acetaldehyde on the order of mM by tracking single molecules of the binding and dissociation processes of nucleic acids. The results of this study highlight the need for appropriate processing of large amounts of data in order to discuss the formation of ethG in detail and quantitatively. In order to establish a data analysis method for the formation and dissociation process of transiently formed ethG, single molecule analysis of nucleic acid aptamers was achieved.

Academic Significance and Societal Importance of the Research Achievements

百薬の長とよばれ我々の人生を豊にしている一方、国際がん研究機関より、ベンゼンなどと同じ「G1: ヒトに対する発がん性がある」に分類されているアルコールの摂取が体に与える影響を理解することは、人類がアルコールとより上手に付き合うことにつながる。我々が行ったハイスループットな1分子観測は、低頻度、かつ、短時間にしか生じない、すなわち、過渡的な準安定生成物の生成・代謝機構を調べる有効なツールとなりうることが示された。一方で、膨大なデータからのデータ抽出が必要でありAI等のデータサイエンス分野との連携が不可欠であることを浮き彫りとした。

Report

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

    (13 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (1 results)

  • [Int'l Joint Research] チューリッヒ大学(スイス)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Single-molecule Fluorescence Kinetic Sandwich Assay Using a DNA Sequencer2022

    • Author(s)
      Kawai Kiyohiko、Fujitsuka Mamoru
    • Journal Title

      Chemistry Letters

      Volume: 51 Issue: 2 Pages: 139-141

    • DOI

      10.1246/cl.210726

    • NAID

      130008161623

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Control of Triplet Blinking Using Cyclooctatetraene to Access the Dynamics of Biomolecules at the Single‐Molecule Level2021

    • Author(s)
      Xu Jie、Fan Shuya、Xu Lei、Maruyama Atsushi、Fujitsuka Mamoru、Kawai Kiyohiko
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 60 Issue: 23 Pages: 12941-12948

    • DOI

      10.1002/anie.202101606

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stacked Thiazole Orange Dyes in DNA Capable of Switching Emissive Behavior in Response to Structural Transitions2021

    • Author(s)
      Takada Tadao、Nishida Koma、Honda Yurika、Nakano Aoi、Nakamura Mitsunobu、Fan Shuya、Kawai Kiyohiko、Fujitsuka Mamoru、Yamana Kazushige
    • Journal Title

      ChemBioChem

      Volume: 22 Issue: 17 Pages: 2729-2735

    • DOI

      10.1002/cbic.202100309

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Single-Molecule Study of Redox Reaction Kinetics by Observing Fluorescence Blinking2021

    • Author(s)
      Kawai Kiyohiko、Fujitsuka Mamoru、Maruyama Atsushi
    • Journal Title

      Accounts of Chemical Research

      Volume: 54 Issue: 4 Pages: 1001-1010

    • DOI

      10.1021/acs.accounts.0c00754

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dynamics of Single‐Stranded RNA Looping Probed and Photoregulated by Sulfonated Pyrene2020

    • Author(s)
      J. Xu, S. Tojo, M. Fujitsuka and K. Kawai
    • Journal Title

      ChemistrySelect

      Volume: 5 Issue: 26 Pages: 8002-8008

    • DOI

      10.1002/slct.202002231

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Kinetics of Photoinduced Reactions at the Single‐Molecule Level: The KACB Method2020

    • Author(s)
      Kawai Kiyohiko、Maruyama Atsushi
    • Journal Title

      Chemistry - A European Journal

      Volume: 26 Issue: 35 Pages: 7740-7746

    • DOI

      10.1002/chem.202000439

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Single molecule analysis and diagnosis by measuring chemical reaction rates2022

    • Author(s)
      Kiyohiko KAWAI, Atsushi MARUYAMA, Mamoru FUJITSUKA
    • Organizer
      The 25th SANKEN International Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] DNAシーケンサーを用いたDNAアプタマーの1分子計測2022

    • Author(s)
      川井 清彦、藤塚 守
    • Organizer
      日本化学会第102春季年会(2022)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Exploring the Dynamics of Nucleic Acids at the Single-Molecule Level Using Triplet-Triplet Energy Transfer Kinetics2021

    • Author(s)
      Jie Xu, Atsushi Maruyama, Mamoru Fujitsuka, Kiyohiko Kawai
    • Organizer
      ISNAC 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Using Triplet-Triplet Energy Transfer Kinetics to Access the Dynamics of Biomolecules at the Single-Molecule Level2021

    • Author(s)
      Jie XU, Shuya FAN, Lei XU, Atsushi MARUYAMA, Mamoru FUJITSUKA, Kiyohiko KAWAI
    • Organizer
      光化学討論会2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Single-Molecule Level Monitoring of Nucleic Acids Conformational Changes by Controlling the Fluorescence Blinking2019

    • Author(s)
      Kiyohiko Kawai
    • Organizer
      π-System Figuration European-Japanese Workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 核酸科学ハンドブック2020

    • Author(s)
      日本核酸化学会、杉本 直己
    • Total Pages
      576
    • Publisher
      講談社
    • ISBN
      9784065207864
    • Related Report
      2020 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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