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Quantitative estimation of dose enhancement caused by radiation sensitizer gold nanoparticle

Research Project

Project/Area Number 17J03616
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Medical Physics and Radiological Technology
Research InstitutionHokkaido University

Principal Investigator

権 池勲  北海道大学, 医学研究科, 特別研究員(DC1)

Project Period (FY) 2017-04-26 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2019: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2018: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2017: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywords医学物理 / 放射線治療 / 放射線増感剤 / 血管破壊剤 / ナノ粒子 / MRI / 超音波 / 医学物理(学) / モンテカルロシミュレーション / 線量増加 / 光電効果
Outline of Annual Research Achievements

当該年度では、金ナノ粒子と放射線治療の併用療法による腫瘍の血管破壊効果を、新しい超音波撮影方法である音響血管造影(Acoustic Angiography)により定量化した研究成果を論文化した。
次に、上記の併用療法の後には、腫瘍の血管破壊によって酸素の供給が遮断されるため、腫瘍内で低酸素領域が生じることが予想される。放射線治療の生物学的効果は腫瘍内の酸素濃度に依存することから、低酸素領域の程度と持続期間を定量化するために、Magnetic Resonance Imaging (MRI) によるBlood Oxygen Level Dependent (BOLD) 法を用いた研究を行った。コントロールマウスのグリオブラストーマのMR画像を連続的に取得したところ、マウスの空気吸入時と酸素吸引時の差分を計算することで腫瘍内の低酸素領域を可視化することに成功した。さらに、MR信号が酸素吸入によって変化するときの変化パターンを解析することで、マウス腫瘍の慢性低酸素状態と急性低酸素状態を区別できる可能性が示唆された。このMR画像上で見られた低酸素領域は、同じマウス腫瘍の病理画像上で見られた低酸素領域の分布とおおむね一致したことからも、本手法の有効性が示された。本研究成果について現在論文化に取り組んでいる。本研究で得られた結果から、将来的に金ナノ粒子と放射線治療の併用療法による腫瘍血管破壊を行った場合には腫瘍内が慢性低酸素状態になることが予想される。よって今後はマウス腫瘍に対して血管破壊治療を行い、低酸素領域の定量化とその状態の区別をBOLD MRI法を用いて検討する予定である。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (13 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 7 results) Remarks (1 results)

  • [Int'l Joint Research] Harvard Medical School/Brigham and Women's Hospital/Dana-Farber Cancer Institute(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Dana-Farber Cancer Institute/Brigham and Women's Hospital/Sonovol(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Harvard Medical School/Stanford University/Dana-Farber Cancer Institute(米国)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] Use of 3-D Contrast-Enhanced Ultrasound to Evaluate Tumor Microvasculature After Nanoparticle-Mediated Modulation2020

    • Author(s)
      Kwon Jihun、Rajamahendiran Rajalekha M.、Virani Needa A.、Kunjachan Sijumon、Snay Erin、Harlacher Max、Myronakis Marios、Shimizu Shinichi、Shirato Hiroki、Czernuszewicz Tomasz J.、Gessner Ryan、Berbeco Ross
    • Journal Title

      Ultrasound in Medicine & Biology

      Volume: 46 Issue: 2 Pages: 369-376

    • DOI

      10.1016/j.ultrasmedbio.2019.09.019

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Investigation of Energy Absorption by Clustered Gold Nanoparticles2018

    • Author(s)
      Kwon J, Sutherland K, Makarova A, Matsuura T, Hashimoto T, Peng H, Toshito T, Umegaki K, Shirato H, Shimizu S
    • Journal Title

      Nuclear Instruments and Methods in Physics Research B

      Volume: 429 Pages: 34-41

    • DOI

      10.1016/j.nimb.2018.05.033

    • NAID

      120006878347

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Enabling MRI Guided Radiation Therapy of the Pancreas with MRI Compatible Ultrasound Sensors2019

    • Author(s)
      J Kwon, C.C. Cheng, F Preiswerk, B Madore, S Shimizu, H Shirato, J Bredfeldt
    • Organizer
      The American Association of Physicists in Medicine (AAPM) 61th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Detection of Dosimetrically Relevant Anatomical Changes Near the Pancreas with MRI Compatible Ultrasound Sensors2019

    • Author(s)
      J Kwon, D Brivio, J Mancias, C.C. Cheng, F Preiswerk, B Madore, J Bredfeldt
    • Organizer
      The American Association of Physicists in Medicine (AAPM) 61th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Monitoring of Anatomical Change Near the Pancreas with MR-compatible Ultrasound Sensors2019

    • Author(s)
      J. Kwon, C.C. Cheng, F. Preiswerk, B. Madore, S. Shimizu, H. Shirato, J. S. Bredfeldt
    • Organizer
      The 7th GI-CoRE Medical Science and Engineering Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluating Gold Nanoparticle and Radiation Induced Tumor Microvascular Disruption Using Acoustic Angiography2018

    • Author(s)
      J. Kwon, R. Rajamahendiran, N. Virani, S. Kunjachan, E. Snay, M. Harlacher, M. Myronakis, S. Shimizu, H. Shirato, T. Czernuszewicz, R. Gessner, R. Berbeco
    • Organizer
      AAPM 59th Annual Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of physical parameters on tumor vascular dose enhancement by gold nanoparticles: a simulation study2018

    • Author(s)
      Jihun Kwon, Kenneth Sutherland, Taeko Matsuura, Takayuki Hashimoto, Kikuo Umegaki, Ross Berbeco, Hiroki Shirato, and Shinichi Shimizu
    • Organizer
      New England Chapter of AAPM (NEAAPM) Combined Winter Meeting & Peter Neurath Young Investigators Symposium
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dose Absorption by Bystander Gold Nanoparticles under Proton Irradiation2017

    • Author(s)
      Jihun Kwon, Kenneth Sutherland, Anastasia Makarova, Taeko Matsuura, Takayuki Hashimoto, Hao Peng, Kikuo Umegaki, Hiroki Shirato, and Shinichi Shimizu
    • Organizer
      56th Annual Conference of the Particle Therapy Co-Operative Group (PTCOG56)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of energy absorption by bystander gold nanoparticles: a microscopic study2017

    • Author(s)
      Jihun Kwon, Kenneth Sutherland, Anastasia Makarova, Taeko Matsuura, Takayuki Hashimoto, Hao Peng, Kikuo Umegaki, Hiroki Shirato, and Shinichi Shimizu
    • Organizer
      The American Association of Physicists in Medicine (AAPM) 59th Annual Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Remarks] LinkedIn Sonovol

    • URL

      https://www.linkedin.com/feed/update/urn:li:activity:6612451079474991104/

    • Related Report
      2019 Annual Research Report

URL: 

Published: 2017-05-25   Modified: 2024-03-26  

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