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Studies on the cluster-ion-specific mutagenesis and industrial application

Research Project

Project/Area Number 20K12489
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 80040:Quantum beam science-related
Research InstitutionNational Institutes for Quantum Science and Technology

Principal Investigator

Hase Yoshihiro  国立研究開発法人量子科学技術研究開発機構, 高崎量子応用研究所 放射線生物応用研究部, 上席研究員 (70354959)

Co-Investigator(Kenkyū-buntansha) 森林 健悟  国立研究開発法人量子科学技術研究開発機構, 量子生命科学領域, 上席研究員(定常) (70354975)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsクラスターイオン / 枯草菌 / 致死効果 / 突然変異 / DNA鎖切断 / 動径線量 / 核間距離 / 全ゲノム解析 / 胞子 / 酵素活性
Outline of Research at the Start

クラスタ―イオンビームがもたらす特徴的なエネルギー付与は、複数の原子が近接した状態でターゲットに同時入射することに起因するが、生物影響に関しては全く研究がなされていなかった。研究代表者らは、微生物試料への照射方法を確立し、突然変異の分子的特徴を解析することによって、世界で初めて生物影響に関する“クラスター効果”を示唆する結果を得た。本研究では、裏付けとなる空間的エネルギー付与のシミュレーションも含めてクラスタ―効果の核心に迫るとともに、酵素活性向上変異株の単離と解析から産業応用への有用性を評価する。

Outline of Final Research Achievements

We examined the biological effects of cluster ion beams, which has never been used for the irradiation of biological samples, by using the spores of Bacillus subtilis as a model organism. Mono-layered spore samples prepared on silicon wafer were irradiated in a vacuum chamber and the survival rate was determined. The 2 MeV H2+ showed a lower lethality than 340 MeV H+, although both have a comparable linear energy transfer. The estimated internuclear distance of two protons of 2 MeV H2+ and the radial dose distribution suggest that the spread of deposited total energy over two areas separated by just several nm greatly diminishes the lethality and that the energy density in the very center of the trajectory, possibility within a 1 nm radius, has a great impact on the lethality.

Academic Significance and Societal Importance of the Research Achievements

本研究では、クラスターイオン特有のエネルギー付与を利用することによって、軌道中心のエネルギー密度が致死効果に大きく寄与することを初めて実験的に示唆する結果を得た。高LET放射線の生物効果を理解するツールの1つとして、クラスターイオンの活用が期待される。

Report

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

    (7 results)

All 2023 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 2 results,  Open Access: 5 results) Presentation (2 results)

  • [Journal Article] Effect of closeness between a few atoms forming a cluster ion passing through water on the motion of secondary electrons and radial dose2023

    • Author(s)
      Kengo Moribayashi
    • Journal Title

      Radiation Physics and Chemistry

      Volume: 208 Pages: 110870-110870

    • DOI

      10.1016/j.radphyschem.2023.110870

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Lethality and energy deposition profile of proton cluster beams in Bacillus subtilis spores2022

    • Author(s)
      Hase Yoshihiro、Satoh Katsuya、Chiba Atsuya、Hirano Yoshimi、Moribayashi Kengo、Narumi Kazumasa
    • Journal Title

      QST Takasaki Annual Report 2020

      Volume: QST-M-33 Pages: 98-98

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] Proton-Cluster-Beam Lethality and Mutagenicity in Bacillus subtilis Spores2021

    • Author(s)
      Yoshihiro Hase, Katsuya Satoh, Atsuya Chiba, Yoshimi Hirano, Kengo Moribayashi, and Kazumasa Narumi
    • Journal Title

      Quantum Beam Science

      Volume: 5 Issue: 3 Pages: 25-25

    • DOI

      10.3390/qubs5030025

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Comparative Study on Lethal Effect of Monomer and Cluster Proton Ion Beams in Bacterial Spores2021

    • Author(s)
      長谷純宏、佐藤勝也、千葉敦也、平野貴美、鳴海一雅
    • Journal Title

      QST Takasaki Annual Report 2019

      Volume: QST-M-29 Pages: 94-94

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] 高速クラスタービームによる生命科学・表面界面工学への応用研究2020

    • Author(s)
      土田秀次、長谷純宏、佐藤勝也、他22名
    • Journal Title

      連携重点研究 2019年度成果報告書

      Volume: -

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Presentation] Effect of the thermalization of secondary electrons on plasma formation during the irradiation of heavy ions2022

    • Author(s)
      森林健悟
    • Organizer
      第23回「イオンビームによる表面・界面の解析と改質」特別研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 枯草菌胞子におけるクラスタ―イオンの致死効果及び変異誘発効果2021

    • Author(s)
      長谷純宏、佐藤勝也、森林健悟、千葉敦也、平野貴美、鳴海一雅
    • Organizer
      QST高崎サイエンスフェスタ2021
    • Related Report
      2021 Research-status Report

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

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