• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Investigation of Novel Host Tumor Immunostimulatory Effects Induced by Boron Neutron Capture Therapy

Research Project

Project/Area Number 19K17231
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionKyoto University

Principal Investigator

Watanabe Tsubasa  京都大学, 複合原子力科学研究所, 特定准教授 (30804348)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords中性子捕捉療法 / BNCT / ホウ素中性子捕捉療法 / 免疫療法 / 放射線治療 / 腫瘍免疫
Outline of Research at the Start

ホウ素原子(10B)は生体内元素の数千倍の確率で中性子と反応し、大きなエネルギーを極めて狭い空間へ放出する核反応(ホウ素中性子捕獲反応)を起こす。ホウ素原子を薬剤の形で体内へ注射し、腫瘍細胞に集積させ、そこに中性子を照射することにより病巣内部に限局してホウ素中性子捕獲反応を起こすことが可能である (ホウ素中性子捕捉療法)。
従来のX線照射には免疫システムを賦活し、腫瘍に対する免疫効果を高める効果があることが近年示された。
この研究によりこれまで明らかとなっていないホウ素中性子捕獲反応が免疫システムへ及ぼす影響を調べ、将来的にホウ素中性子捕捉療法を免疫療法と併用する際の学術的な基盤を確立したい。

Outline of Final Research Achievements

Boron neutron capture therapy (BNCT) is a cancer treatment that utilizes the fission of boron atoms into alpha and lithium nuclei when they capture a neutron. The purpose of this study was to investigate the anti-tumor immune response after BNCT. Using a subcutaneous tumor model of mice with malignant melanoma cells, B16, we simultaneously administered BNCT and aCD8 antibody, and found a clear decrease in the anti-tumor effect, indicating that the anti-tumor immune response contributes to the anti-tumor effect of BNCT as well as X-rays and γ-rays. The combination group of BNCT plus aPD1 showed better anti-tumor effect than BNCT alone in terms of change in tumor curve and survival rate. The results of the study showed that the combination of BNCT and aPD1 improved the antitumor effect compared to BNCT alone in terms of tumor curve change and survival rate.

Academic Significance and Societal Importance of the Research Achievements

実験動物を用いたモデルにおいて、BNCTにおいてもX線・γ線などの通常放射線治療として用いられる線種と同様に、抗腫瘍効果に対する宿主の免疫応答も重要であることが判明した。そこで、同モデルを用いてBNCTと抗PD-1抗体の同時併用による癌治療効果を検討し、BNCTと抗PD-1抗体の同時併用による上乗せ効果を認めた。これは既に一部癌腫に対して保険適応にもなっているBNCTの後治療として抗PD-1抗体が有用である可能性を示唆するものであり、既存の治療とのシナジーを求めて臨床でも併用する根拠の1つとなると考える。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (14 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (9 results) (of which Invited: 3 results)

  • [Int'l Joint Research] University of Freiburg(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Quantitative autoradiography in boron neutron capture therapy considering the particle ranges in the samples2021

    • Author(s)
      Takeno Satoshi、Tanaka Hiroki、Watanabe Tsubasa、Mizowaki Takashi、Suzuki Minoru
    • Journal Title

      Physica Medica

      Volume: 82 Pages: 306-320

    • DOI

      10.1016/j.ejmp.2021.02.012

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characteristic evaluation of the thermal neutron irradiation field using a 30 MeV cyclotron accelerator for basic research on neutron capture therapy2020

    • Author(s)
      Tanaka H, Takata T, Watanabe T, Suzuki M, Mitsumoto T, Kawabata S, Masunaga S, Kinashi Y, Sakurai Y, Maruhashi A, Ono K.
    • Journal Title

      Nuclear Inst. And Methods in Physics Research, A

      Volume: 983 Pages: 164533-164533

    • DOI

      10.1016/j.nima.2020.164533

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Deep abscopal response to radiotherapy and anti-PD-1 in an oligometastatic melanoma patient with unfavorable pretreatment immune signature2020

    • Author(s)
      Watanabe Tsubasa、Firat Elke、Scholber Jutta、Gaedicke Simone、Heinrich Corinne、Luo Ren、Ehrat Nicolas、Multhoff Gabriele、Schmitt-Graeff Annette、Grosu Anca-Ligia、Abdollahi Amir、Hassel Jessica C.、von Bubnoff Dagmar、Meiss Frank、Niedermann Gabriele
    • Journal Title

      Cancer Immunology, Immunotherapy

      Volume: 69 Issue: 9 Pages: 1823-1832

    • DOI

      10.1007/s00262-020-02587-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Adding Indoximod to Hypofractionated Radiotherapy with Anti-PD-1 Checkpoint Blockade Enhances Early NK and CD8+ T-Cell?Dependent Tumor Activity2020

    • Author(s)
      Watanabe Tsubasa、Gaedicke Simone、Guffart Elena、Firat Elke、Niedermann Gabriele
    • Journal Title

      Clinical Cancer Research

      Volume: 26 Issue: 4 Pages: 945-956

    • DOI

      10.1158/1078-0432.ccr-19-0476

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] シンポジウム4 「高精度放射線治療における放射線生物学」「免疫療法時代における高精度放射線治療の役割」2021

    • Author(s)
      渡邉翼
    • Organizer
      第34回高精度放射線外部照射部会学術大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 良好なアブスコパル効果を認めた転移性悪性黒色腫患者の末梢血免疫反応の解 析2020

    • Author(s)
      渡邉翼
    • Organizer
      第58回癌治療学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 臓器別シンポジウム「免疫療法時代における局所療法の意義」 「放射線治療と免疫療法併用における放射線治療の役割と可能性」2020

    • Author(s)
      渡邉翼
    • Organizer
      第58回癌治療学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 放射線照射と免疫療法併用における腫瘍組織内代謝競合の役割2020

    • Author(s)
      渡邉翼
    • Organizer
      日本放射線腫瘍学会第33回学術大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 良好なアブスコパル効果を認めた転移性悪性黒色腫患者の末梢血免疫反応の解析2020

    • Author(s)
      渡邉翼
    • Organizer
      第2回生体量子捕獲反応研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 硼素中性子捕捉療法により誘導される宿主免疫を介した照射後抗腫瘍効果増感作用の研究2020

    • Author(s)
      渡邉翼
    • Organizer
      第22回癌治療増感シンポジウム
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
  • [Presentation] Indoleamine 2,3-deoxygenase阻害剤は放射線治療と免疫チェックポイント阻害剤の効果を増強する2020

    • Author(s)
      渡邉翼
    • Organizer
      第22回癌治療増感シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Indoleamine 2,3-deoxygenase阻害剤は放射線治療と免疫チェックポイント阻害剤の効果を増強する2020

    • Author(s)
      渡邉翼、吉村通央、溝脇尚志、鈴木実、Gabriele Niedermann
    • Organizer
      第22回癌治療増感シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] トリプトファン代謝酵素阻害剤は放射線と抗PD-1抗体併用による治療効果を増強する2019

    • Author(s)
      渡邉翼、溝脇尚志、鈴木実、Gabriele Niedermann
    • Organizer
      第32回日本放射線腫瘍学会
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi