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Analysis of influence of medical radiation exposure on chromosome by CT examination and biological dose evaluation

Research Project

Project/Area Number 16K08970
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Laboratory medicine
Research InstitutionFukushima Medical University

Principal Investigator

SAKAI AKIRA  福島県立医科大学, 医学部, 教授 (70284221)

Co-Investigator(Kenkyū-buntansha) 阿部 悠  福島県立医科大学, 医学部, 助教 (00722472)
野地 秀義  福島県立医科大学, 医学部, 准教授 (20347214)
吉田 光明  弘前大学, 被ばく医療総合研究所, 教授 (60182789)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords生物学的線量評価 / 二動原体染色体 / 転座型染色体 / 低線量被曝 / CT検査 / 医療被曝 / 医療被ばく / 染色体異常 / 染色体
Outline of Final Research Achievements

Analyzing the frequency of chromosome aberrations (CAs) such as dicentric chromosomes (Dics) and chromosome translocations (Trs) formation, at the time of radiation exposure (RE) can be used for biological dosimetry methods. We analyzed the effect of RE from CT examination by examining Dics and Trs. Analysis of 12 people showed a significant increase in Dics after a single CT examination, but did not show a significant increase in Trs. Subsequently, analysis of 8 people who underwent three consecutive CT examinations did not show a cumulative increase in the frequencies of Dics or Trs. The frequency of Trs was higher than that of Dics regardless of CT examination.
We then constructed dose-response curves (DRCs) for low- to medium-dose RE using peripheral blood samples from 5 healthy individuals. Aliquots were irradiated with one of eight gamma-ray doses of 1 Gy or less. DRCs showed a large variation between individuals in the frequency of Dics and Trs.

Academic Significance and Societal Importance of the Research Achievements

生物学的線量評価方法に二動原体染色体 (Dics) や転座型染色体 (Trs) の形成数を用いた解析方法があるが、低線量被曝の典型であるCT検査時の放射線被曝においてもDicsの増加を認め染色体切断が誘導されていることが示唆された。また安定型染色体であるTrsは、過去の放射線被曝の影響が残るため低線量被爆後の急性期の被曝線量の解析には適していないが、理論的にはTrsとDicsは同じ頻度で形成されるため、CT検査時にはTrsの形成も誘導されていることが推測できる。したがって、これらの解析結果は過剰な医療被曝に対して警鐘を鳴らす1つのエビデンスと考える。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2018 2017 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results) Book (1 results) Remarks (2 results)

  • [Journal Article] Dose-response curves for analyzing of dicentric chromosomes and chromosome translocation following doses of 1,000 mGy or less based on irradiated peripheral blood samples from 5 healthy individuals.2018

    • Author(s)
      Abe Y, Yoshida MA, Fujioka K, Kurosu Y, Ujiie R, Yanagi A, Tsuyama N, Miura T, Inaba T, Kamiya K, Sakai A
    • Journal Title

      Journal of Radiation Research

      Volume: 59 Issue: 1 Pages: 35-42

    • DOI

      10.1093/jrr/rrx052

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Investigation of the cumulative number of chromosome aberrations induced by three consecutive CT scans.2018

    • Author(s)
      Yu Abe, Hideyoshi Noji, Misaki Sugai, Yumiko Kurosu, Takashi Ohba, Naohiro Tsuyama, Aki Yanagi, Yukari Yanai, Tetsuo Ishikawa, Tomisato Miura, Kenji Kamiya, Mitsuaki A Yoshida, Akira Sakai.
    • Organizer
      American Association for Cancer Research Annual Meeting 2018.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Construction of dose response curves for cytogenetic biodosimetry in the low dose range based on five persons.2018

    • Author(s)
      Yu Abe, Mitsuaki A Yoshida, Kurumi Fujioka, Yumiko Kurosu, Risa Ujiie, Aki Yanagi, Naohiro Tsuyama, Tomisato Miura, Toshiya Inaba, Kenji Kamiya, Akira Sakai.
    • Organizer
      EPRBioDose 2018.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Attempt to make abnormal B lymphocytes as myeloma-initiating cells from iPSs.2018

    • Author(s)
      柳 亜希、津山尚宏、柳井祐佳里、阿部 悠、菅井美咲、太田明伸、シバスンダラン カルナン、笹谷めぐみ、神谷研二、花村一朗、池添隆之、小野寺雅史、坂井 晃.
    • Organizer
      第80回日本血液学会学術集会.
    • Related Report
      2018 Annual Research Report
  • [Presentation] Analysis of the number of chromosome aberrations induced by three consecutive CT examinations.2018

    • Author(s)
      Abe Y, Noji H, Sugai M, Kurosu Y, Tsuyama N, Yanagi A, Yanai Y, Ohba T, Ishikawa T, Miura T, Kamiya K, Yoshida MA, Sakai A.
    • Organizer
      第61回日本放射線影響学会.
    • Related Report
      2018 Annual Research Report
  • [Presentation] CRISPR/Cas9を用いたt(11; 14)染色体転座誘発.2018

    • Author(s)
      津山尚宏、阿部悠、柳亜紀、菅井美咲、坂井晃.
    • Organizer
      61回日本放射線影響学会.
    • Related Report
      2018 Annual Research Report
  • [Presentation] Attempt to prove the existence of abnormal B lymphocyte as myeloma-initiating cells from B cell-derived induced pluripotent stem cells.2018

    • Author(s)
      Yanagi A, Tsuyama N, Yanai Y, Abe Y, Sugai M, Ota A, Sivasundaram K, Shigemura T, Sasatani M, Kamiya K, Hanamura I, Ikezoe T, Onodera M, Sakai A.
    • Organizer
      60th ASH Annual Meeting.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of the cumulative number of chromosome aberrations induced by three consecutive CT scans2018

    • Author(s)
      阿部 悠、野地秀義、菅井美咲、黒須由美子、津山尚宏、柳 亜希、柳井祐佳里、大葉 隆、石川徹夫、三浦富智、神谷研二、吉田光明、坂井 晃
    • Organizer
      2018年アメリカがん学会 (AACR)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 継続的なCT検査による染色体異常形成数の累積生の検討2017

    • Author(s)
      阿部 悠、菅井美咲、黒須由美子、津山尚宏、柳 亜希、柳井祐佳里、吉田光明、大葉 隆、野地秀義、石川徹夫、神谷研二、坂井 晃
    • Organizer
      第60回日本放射線影響学会
    • Related Report
      2017 Research-status Report
  • [Book] 多発性骨髄腫の進展と遺伝子不安定性.2018

    • Author(s)
      坂井 晃
    • Total Pages
      7
    • Publisher
      日本臨床. 特集
    • Related Report
      2018 Annual Research Report
  • [Remarks] 医療被ばくによる染色体への影響解析

    • URL

      https://cms2.fmu.ac.jp/cms/rls/iryohibaku_chr.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 生物学的線量評価に用いる二動原体染色体と転座型染色体解析用の検量線の作成

    • URL

      https://cms2.fmu.ac.jp/cms/rls/wp-content/uploads/sites/120/2017/10/6ab75285f1e9b8f02f3ad4de4ed30076.pdf

    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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