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Mutation sigunature of atomic bomb survivor's cancer tissue

Research Project

Project/Area Number 19K07463
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49020:Human pathology-related
Research InstitutionNagasaki University

Principal Investigator

Akazawa Yuko  長崎大学, 原爆後障害医療研究所, 准教授 (80582113)

Co-Investigator(Kenkyū-buntansha) 中島 正洋  長崎大学, 原爆後障害医療研究所, 教授 (50284683)
柴田 龍弘  国立研究開発法人国立がん研究センター, 研究所, 分野長 (90311414)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsatomic bomb / survivor / mutation signature / radiation / DNA damage / 放射線 / 被曝者 / 遺伝子変異 / シグネチャー解析 / 遺伝子損傷応答 / 被ばく者 / 遺伝子変異シグネチャー / 癌
Outline of Research at the Start

原爆投下から70年以上経過した現在でも広島・長崎被爆者においては発癌の増加が認められている。被爆者組織検体は放射線晩発影響を研究する上での唯一のコホートである。しかし,原爆による放射線被ばく関連腫瘍の分子生物学的機序や遺伝子的な特異性は未だ不明である。近年、変異スペクトラム解析の進歩によって、癌の原因によって生じた遺伝子変異パターンが、癌遺伝子に残される“変異シグネチャー”として検出可能であることが発表された。今回我々は、2008年に収集を開始した被爆者癌組織バンク検体を用い、被爆により発症した癌に特異的な遺伝子変異シグネチャーを特定し、放射線発癌の遺伝子学的メカニズムの解明に挑む。

Outline of Final Research Achievements

We aimed to perform whole-genome analysis and signature analysis using next-generation sequencers to identify characteristic structural variations and mutation signatures specific to cancer among atomic bomb (A-bomb) survivors. We have already initiated a pilot study on 20 cases of close-range exposure (13 lung cancer cases and 7 thyroid cancer cases), and confirmed the feasibility of analyzing DNA quality in thyroid cancer and lung cancer of cases with very close-range exposure. We found no significant differences in the number or types of structural variants larger than 50 base pairs between close-range and distant-range exposed individuals. Fusion genes, including RET-PTC, which were observed in the aftermath of the Chernobyl accident, were not prominent in A-bomb survivors. However, we discovered a new fusion gene that has not been reported before in thyroid cancer among individuals with close-range A-bomb exposure patients. We are currently conducting further signature analysis.

Academic Significance and Societal Importance of the Research Achievements

原爆による放射線被ばくによる発がんのマーカーがゲノム内に検出できれば、集団の中で疫学的にしか明らかではなかった原爆被ばく者の発がんリスクが、個々の症例レベルで分子遺伝学的に放射線誘発性を同定することが可能になる。放射線の医療利用による発がんを含め、被ばく後長期的な発がんのリスク予測など社会的重要性は大きく、放射線防護基準に影響を与える可能性がある。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (1 results) Funded Workshop (1 results)

  • [Journal Article] Detection of Endogenous DNA Double-strand Breaks in Oral Squamous Epithelial Lesions by P53-binding Protein 12021

    • Author(s)
      IMAIZUMI TOSHINOBU、MATSUDA KATSUYA、TANAKA KEI、KONDO HISAYOSHI、UEKI NOZOMI、KUROHAMA HIROKAZU、OTSUBO CHIEKO、MATSUOKA YUKI、AKAZAWA YUKO、MIURA SHIRO、NAKASHIMA MASAHIRO
    • Journal Title

      Anticancer Research

      Volume: 41 Issue: 10 Pages: 4771-4779

    • DOI

      10.21873/anticanres.15292

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 53BP1 expression as a biomarker to differentiate thyroid follicular tumors2021

    • Author(s)
      Sato Ayako、Matsuda Katsuya、Motoyama Takahiro、Mussazhanova Zhanna、Otsubo Ryota、Kondo Hisayoshi、Akazawa Yuko、Higuchi Miyoko、Suzuki Ayana、Hirokawa Mitsuyoshi、Miyauchi Akira、Nagayasu Takeshi、Nakashima Masahiro
    • Journal Title

      Endocrine Connections

      Volume: 10 Issue: 3 Pages: 309-315

    • DOI

      10.1530/ec-20-0630

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 長崎被爆者組織バンク収集におけるCovid-19パンデミックのインパクト2022

    • Author(s)
      Yuko Akazawa
    • Organizer
      日本放射線影響学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] End of an era of sample collection for the Nagasaki Atomic Bomb Survivor's tumor tissue bank2022

    • Author(s)
      Yuko Akazawa
    • Organizer
      4th Japan-Germany Symposium on Advanced Preventive Medicine 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 長崎被爆者組織バンク収集におけるコロナインパクト2021

    • Author(s)
      赤澤祐子
    • Organizer
      日本病理学会
    • Related Report
      2021 Research-status Report
  • [Book] 今と昔の長崎に遊ぶ2021

    • Author(s)
      増﨑 英明、前田桂子、木村直樹、野上建紀、王維、中島貴奈、吉良史明、Rudy Toet, 南森茂太、田口由香、山口敦子、安武敦子、赤澤祐子、在津祐美子、大平晃久、全炳徳、出水享
    • Total Pages
      330
    • Publisher
      九州大学出版会
    • ISBN
      9784798503103
    • Related Report
      2021 Research-status Report
  • [Funded Workshop] American association for the study of liver diseases2019

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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