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Elucidation of biological effects of proton therapy - comparison with X rays

Research Project

Project/Area Number 15K10006
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Radiation science
Research InstitutionNagoya City University

Principal Investigator

Shibamoto Yuta  名古屋市立大学, 大学院医学研究科, 教授 (20144719)

Co-Investigator(Kenkyū-buntansha) 村井 太郎  名古屋市立大学, 大学院医学研究科, 助教 (00747602)
荻野 浩幸  名古屋市立大学, 大学院医学研究科, 高度医療教育研究センター教授 (60315885)
岩田 宏満  名古屋市立大学, 大学院医学研究科, 研究員 (40611588)
Research Collaborator Ogino Hiroyuki  名古屋市立大学, 大学院医学研究科, 研究員 (60315885)
Iwata Hiromitsu  名古屋市立大学, 大学院医学研究科, 研究員 (40611588)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords陽子線治療 / 生物効果 / 酸素効果 / 潜在的致死障害 / 亜致死障害 / DNA修復 / 放射線生物学 / SLDR / PLDR / 生物学 / 生物学的効果比
Outline of Final Research Achievements

Biological effects of proton beams were investigated in comparison with X rays using cultured cells and fruit flies. Our proton beams had an average relative biological effectiveness (RBE) of about 1.1, but had slightly higher oxygen effects and suppressive effects on sublethal and potentially lethal damage repairs. These were considered to be attributable to the higher proportion of the direct action on DNA. Biological effects of spot scanning irradiation were similar to those of broad beam irradiation. RBE increased at the distal end of the spread-out Bragg peak. Proton beams may have biological advantages over X rays against radioresistant tumors.

Academic Significance and Societal Importance of the Research Achievements

陽子線の生物効果については、ほぼX線の効果と同じというように考えられてきたため、まだ生物効果についての基礎研究が少なかったが、当研究によって、様々な点においてX線との間にある程度の違いがあることが明らかとなった。臨床的には、陽子線がX線に比べて線量分布が良いという点だけでなく、効果においてもX線よりある程度優れていることが示唆された。今後の陽子線治療の臨床において、X線治療との使い分けのために参考になるデータが得られたと考えられる。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Acknowledgement Compliant: 1 results) Presentation (4 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Effect of a Device-Free Compressed Shell Fixation Method on Hepatic Respiratory Movement: Analysis for Respiratory Amplitude of the Liver and Internal Motions of a Fiducial Marker2019

    • Author(s)
      Hashimoto S, Katsurada M, Muramatsu R, Asai K, Tanaka K, Hayashi K, Kibe Y, Nakajima K, Hattori Y, Iwata H, Mizoe JE, Ogino H, Shibamoto Y.
    • Journal Title

      Practical Radiation Oncology

      Volume: 9 Issue: 2 Pages: e149-e155

    • DOI

      10.1016/j.prro.2018.10.001

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Recovery from sublethal damage and potentially lethal damage. Proton beam irradiation vs. X-ray irradiation2018

    • Author(s)
      Shingo Hashimoto, Chikao Sugie, Hiromitsu Iwata, Hiroyuki Ogino, Chihiro Omachi, Keisuke Yasui, Jun-etsu Mizoe, Yuta Shibamoto
    • Journal Title

      Strahlentherapie und Onkologie

      Volume: 194 Issue: 4 Pages: 343-351

    • DOI

      10.1007/s00066-017-1223-9

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spot Scanning and Passive Scattering Proton Therapy: Relative Biological Effectiveness and Oxygen Enhancement Ratio in Cultured Cells2016

    • Author(s)
      Name of Authors Iwata H, Ogino H, Hashimoto S, Yamada M, Shibata H, Yasui K, Toshito T, Omachi C, Tatekawa K, Manabe Y, Mizoe JE, Shibamoto Y
    • Journal Title

      International Journal of Radiation Oncology Biology Physics

      Volume: 95 Issue: 1 Pages: 95-102

    • DOI

      10.1016/j.ijrobp.2016.01.017

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Effects of proton beams and X rays on the cell cycle of fluorescent ubiquitination-based cell cycle indicator (Fucci)-expressing cells2018

    • Author(s)
      Hiromitsu Iwata, Yuta Shibamoto 他
    • Organizer
      2018 Annual Meeting of the American Society for Radiation Oncology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Drosophila Melanogaster as a Model Organism to Study Biological Effects of Proton Radiation2018

    • Author(s)
      Koichiro Nakajima, Yuta Shibamoto 他
    • Organizer
      2018 Annula Meeting of the Particle Therapy Cooperative Group
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Biological Effects of Proton and Photon Therapy in Combination with Cisplatin and Their Possible Mechanisms: an In Vitro Study2017

    • Author(s)
      Hiromitsu Iwata, Shingo Hashimoto, Koichiro Nakajima, Chihiro Omachi, Toshiyuki Toshito, Keisuke Yasui, Chikao Sugie, Hiroyuki Ogino, Jun-etsu Mizoe, Yuta Shibamoto
    • Organizer
      59th Annual Meeting of the American Society for radiation Oncology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Potentially lethal damage repair and sublethal damage repair after proton beam irradiation2016

    • Author(s)
      Shingo Hashimoto, Chikao Sugie, Hiromitsu Iwata, Hiroyuki Ogino, Chihiro Omachi, Keisuke Yasui, Jun-etsu Mizoe, Yuta Shibamoto
    • Organizer
      日本放射線腫瘍学会 第29回学術大会
    • Place of Presentation
      国立京都国際会館(京都府・京都市)
    • Year and Date
      2016-11-26
    • Related Report
      2016 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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