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Evaluation system of Dose Distribution in Boron Neutron Capture Therapy

Research Project

Project/Area Number 20K12714
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90140:Medical technology assessment-related
Research InstitutionOkayama University

Principal Investigator

Igawa Kazuyo  岡山大学, 中性子医療研究センター, 准教授 (90512111)

Co-Investigator(Kenkyū-buntansha) 小川原 亮  京都大学, 化学研究所, 助教 (00807729)
泉 健次  新潟大学, 医歯学系, 教授 (80242436)
楠本 多聞  国立研究開発法人量子科学技術研究開発機構, 高度被ばく医療センター 計測・線量評価部, 博士研究員(任常) (90825499)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsがん治療 / BNCT / ホウ素分布 / 固体飛跡検出器 / 線量評価 / 放射線飛跡検出器 / 三次元口腔がんモデル / ホウ素 / 口腔がん / 三次元培養モデル / 中性子捕捉反応 / 中性子線量 / 三次元培養
Outline of Research at the Start

切除不能な局所進行又は局所再発の頭頸部がんに対して、加速器中性子源を用いたホウ素中性子捕捉療法(BNCT)が承認され、その優れた局所制御、機能温存、整容の点からQuality of Lifeの改善による治療後の早期社会復帰が期待されている。一方、簡便で患者負担の少ないBNCT適正検査の確立が求められている。BNCTの適応第一条件は、ホウ素が腫瘍部に集積し、腫瘍周囲の正常部には集積しないことである。そこで本研究では、ホウ素集積性BNCT検査システムを構築し、加速器中性子源を用いたBNCT組織内線量分布の評価体系の確立を目指す。

Outline of Final Research Achievements

Boron neutron capture therapy (BNCT) is a radiation cancer treatment based on (10B(n,α)7Li) reaction on a cancer cell by thermal neutron irradiation. The success of BNCT treatment depends on determining the neutron dose based on the distribution and concentration of boron-10 atoms in the tumor and normal tissues. In this study, we established a simple evaluation system of boron-10 tissue dose distribution using CR-39 nuclear track detector. Specially, the biological samples, such as cells and tissues of three-dimensional cancel models and tumor-bearing mice, containing boron-10 fixed to CR-39 by irradiation of thermal neutrons enabled the visualization of the boron-10 concentration as autoradiographs. These methods were applicable for evaluating the concentration of delivered boron -10 agents in the targeted tissue and cell and for assessment of absorbed dose. The results are expected to be applied clinically as boron accumulation tests and BNCT dosimetry before BNCT treatment.

Academic Significance and Societal Importance of the Research Achievements

本研究の組織内10B濃度分布評価法の確立により、患者ごとの10B濃度分布に基づいた線量計算が可能となり正確な処方中性子線量をBNCT治療計画で立案できる。組織内線量分布の評価体系の確立により「最善・最良」のがん治療となる頭頸部がんの組織系や部位を推奨できるようになり臨床意義がかなり高いといえる。さらに、新規薬剤10Bの開発、BNCT適応疾患拡大などBNCTの発展に大いに貢献できる。

Report

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

    (12 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (1 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] 国際原子力機関(オーストリア)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Scaling parameter of the lethal effect of mammalian cells based on radiation-induced OH radicals: effectiveness of direct action in radiation therapy.2021

    • Author(s)
      Tamon Kusumoto, Ryo Ogawara, Kazuyo Igawa, Kentaro Baba, Teruaki Konishi, Yoshiya Furusawa, Satoshi Kodaira.
    • Journal Title

      .J Radiat Res. 2021

      Volume: 62 Issue: 1 Pages: 86-93

    • DOI

      10.1093/jrr/rraa111

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 三次元培養細胞とCR-39を用いたBNCT有効性評価システムの開発2023

    • Author(s)
      小川原 亮
    • Organizer
      第35回 固体飛跡検出器研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Current Status Boron Neutron Capture Therapy for Head and Neck Cancer2022

    • Author(s)
      井川和代
    • Organizer
      The 3rd Takao Forum of Oral Maxillofacial Surgery
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 加速器中性子場における CR-39 と PEW エッチングを用いた組織切片内 B-10 濃度分布測定2022

    • Author(s)
      小川原 亮
    • Organizer
      第34回 固体飛跡検出器研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Evaluation system of BNCT ~ Indication of BNCT ~2022

    • Author(s)
      Kazuyo Igawa
    • Organizer
      Technical Meeting on Best Practices in Boron neutron Capture Therapy EVT2104151
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 正常口腔粘膜細胞と口腔癌細胞を用いた3次元in vitroモデル作製法とその応用2021

    • Author(s)
      内藤絵里子
    • Organizer
      第57回日本口腔組織培養学会学術大会・総会
    • Related Report
      2021 Research-status Report
  • [Presentation] The activities of BNCT at Okayama University2021

    • Author(s)
      Kazuyo Igawa
    • Organizer
      TSNCT
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] BNCT evaluation system2020

    • Author(s)
      Kazuyo Igawa
    • Organizer
      IAEA virtual Technical meeting
    • Related Report
      2020 Research-status Report
  • [Book] medical Science Digest2023

    • Author(s)
      井川和代、道上宏之、藤村篤史
    • Total Pages
      3
    • Publisher
      ニューサイエンス社
    • Related Report
      2022 Annual Research Report
  • [Remarks] KURNS PROGRESS REPORT 2020

    • URL

      https://www.rri.kyoto-u.ac.jp/PUB/report/PR/ProgRep2020/ProgRep2020.html

    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] がん治療法の有効性を評価するための方法、キット、構造物及び使用2022

    • Inventor(s)
      井川和代、泉健次、羽賀健太、内藤絵里子
    • Industrial Property Rights Holder
      井川和代、泉健次、羽賀健太、内藤絵里子
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report

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

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