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Development of a method for predicting tumor immune activation by radiotherapy

Research Project

Project/Area Number 19K08230
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionSapporo Medical University

Principal Investigator

HASEGAWA TOMOKAZU  札幌医科大学, 医学部, 助教 (80631168)

Co-Investigator(Kenkyū-buntansha) 小塚 陽 (小塚 陽介)  札幌医科大学, 医学部, 訪問研究員 (50808160)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsニューラルネットワーク / 腫瘍免疫 / 放射線治療 / 機械学習
Outline of Research at the Start

腫瘍細胞を細胞死に至らせる免疫原性細胞死(Immunogenic cell death)の誘導の有無が放射線治療成績に影響を与えて可能性に着目し、人工知能による解析手法の一つである機械学習法を用いて、より精度の高い適切な治療効果予測モデル作成する。患者個々で、放射線治療による免疫原性腫瘍死の有無や程度が予測できれば、個別化した放射線治療、特に、免疫チェックポイント阻害剤との効果的な併用法に寄与することが期待できる。今後の免疫療法を併用した放射線治療の臨床応用に向けて大きな知見をもたらすものとなる。

Outline of Final Research Achievements

The objective is to create a prediction model of tumor immune activation by radiotherapy using machine learning methods with high accuracy and easy clinical application. As a preliminary step, a radiotherapy effect prediction model was created by immunohistochemistry using biopsy specimens. Both prostate and hypopharyngeal cancers showed improved prediction accuracy in the analysis using ANN compared to the conventional method.
In addition, using samples of cervical cancer, we used QuPath software to classify and quantify the immunohistochemistry staining decisions, and verified that there was no significant difference compared to the results of manual counting. In the future, we will perform the same analysis on samples of mesopharyngeal carcinoma, aiming for objective evaluation and automation of the determination method of immunohistochemical staining.

Academic Significance and Societal Importance of the Research Achievements

現在は、放射線治療が施行される場合、腫瘍の大きさや組織型が同じであれば画一的な線量が照射されているが、治療成績にばらつきがあり、癌組織の放射線感受性に応じた、個別化した放射線治療が求められている。放射線治療と免疫チェックポイント阻害剤の併用は行われ始めているが、最適な併用法や増感メカニズムなど未解明な点が多く、精度の高い臨床応用が容易な放射線治療による腫瘍免疫活性化の予測モデルの作成を目指す。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (3 results)

  • [Journal Article] Radiotherapy for HPV-related cancers: prediction of therapeutic effects based on the mechanism of tumor immunity and the application of immunoradiotherapy2022

    • Author(s)
      Someya Masanori、Fukushima Yuki、Hasegawa Tomokazu、Tsuchiya Takaaki、Kitagawa Mio、Gocho Toshio、Mafune Shoh、Ikeuchi Yutaro、Kozuka Yoh、Hirohashi Yoshihiko、Torigoe Toshihiko、Iwasaki Masahiro、Matsuura Motoki、Saito Tsuyoshi、Sakata Koh-ichi
    • Journal Title

      Japanese Journal of Radiology

      Volume: - Issue: 5 Pages: 458-465

    • DOI

      10.1007/s11604-021-01231-4

    • NAID

      210000178430

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prediction of treatment response from the microenvironment of tumor immunity in cervical cancer patients treated with chemoradiotherapy2021

    • Author(s)
      Someya Masanori、Tsuchiya Takaaki、Fukushima Yuki、Hasegawa Tomokazu、Hori Masakazu、Kitagawa Mio、Gocho Toshio、Mafune Shoh、Ikeuchi Yutaro、Hirohashi Yoshihiko、Torigoe Toshihiko、Iwasaki Masahiro、Matsuura Motoki、Saito Tsuyoshi、Matsumoto Yoshihisa、Sakata Koh-ichi
    • Journal Title

      Medical Molecular Morphology

      Volume: 54 Issue: 3 Pages: 245-252

    • DOI

      10.1007/s00795-021-00290-w

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Prediction of Results of Radiotherapy With Ku70 Expression and an Artificial Neural Network2020

    • Author(s)
      TOMOKAZU HASEGAWA, MASANORI SOMEYA, MASAKAZU HORI, TAKAAKI TSUCHIYA, YUUKI FUKUSHIMA, YOSHIHISA MATSUMOTO, KOH-ICHI SAKATA
    • Journal Title

      in vivo

      Volume: 34 Issue: 5 Pages: 2865-2872

    • DOI

      10.21873/invivo.12114

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 血中エクソソームmiRNAを用いた子宮頸癌の治療効果予測2021

    • Author(s)
      染谷正則、土屋高旭、長谷川智一、福島悠希、池内佑太郎、眞船翔、北川未央、後町俊夫、坂田耕一
    • Organizer
      日本放射線腫瘍学会第34回学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Relationship between the type of CD8 invasion and prognosis in cervical cancer patients treated with definitive radiotherapy.2021

    • Author(s)
      染谷正則、福島悠希、土屋高旭、長谷川智一、堀正和、後町俊夫、小塚陽、池内佑太郎、眞船翔、坂田耕一
    • Organizer
      第80回日本医学放射線学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 子宮頸癌根治照射症例におけるCD8の浸潤形式と予後との関連2021

    • Author(s)
      染谷正則、土屋高旭、福島悠希、長谷川智一、北川未央、後町俊夫、岩崎雅宏、松浦基樹、齋藤豪、坂田耕一
    • Organizer
      第59回 日本癌治療学会学術集会
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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