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Evaluation of hydrogen peroxide as radiation sensitizer for pancreatic cancer

Research Project

Project/Area Number 20K08306
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionGifu University

Principal Investigator

Iwashita Takuji  岐阜大学, 医学部附属病院, 講師 (60467206)

Co-Investigator(Kenkyū-buntansha) 兵藤 文紀  岐阜大学, 大学院医学系研究科, 教授 (10380693)
岩崎 遼太  岐阜大学, 応用生物科学部, 助教 (20782139)
松尾 政之  岐阜大学, 大学院医学系研究科, 教授 (40377669)
森 崇  岐阜大学, 応用生物科学部, 教授 (40402218)
富田 弘之  岐阜大学, 大学院医学系研究科, 准教授 (50509510)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords膵癌 / 放射線治療 / 増感剤 / 過酸化水素 / 動的核変極MRI / レドックス代謝 / DNP-MRI / 酸素イメージング / ヒドロキシラジカルイメージング / ヒドロキシルラジカルイメージング / 放射線増感剤 / 超音波内視鏡下局注
Outline of Research at the Start

腫瘍が放射線治療抵抗性を示すメカニズムとして腫瘍内の低酸素状態、抗酸化酵素の存在が知られている。過酸化水素(H2O2)が放射線治療に増感的に作用すると報告されているが、H2O2が放射線増感作用を示す重要なメカニズムとされるヒドロキシラジカル発生、低酸素状態の改善と放射線増感作用との関係については明らかでない。本研究の目的は動的核変極MRIや電子スピン共鳴画像による分子画像を用いヒドロキシラジカルの発生、腫瘍内酸素分圧を定量的に評価し作用メカニズムを明らかにすることである。

Outline of Final Research Achievements

To refine the optimal treatment protocol, we developed a mouse model of pancreatic cancer by transplanting human pancreatic cancer cells (MIAPaCa2) into the right hind limb of nude mice. We then investigated the impact of varying frequencies of intratumoral hydrogen peroxide (H2O2) injections on radiation therapy efficacy, based on the relationship between injection frequency and tumor growth curves. Tumor volume was evaluated following irradiation (5 Gy x 3 days, total 15 Gy) and local injection of 0.5% H2O2 solution. Preliminary results suggest a potential positive effect of H2O2 injection, warranting further investigation. Currently, we are employing dynamic nuclear magnetic resonance imaging to examine the optimal timing of H2O2 injection and irradiation concerning redox metabolism.

Academic Significance and Societal Importance of the Research Achievements

膵癌は非常に予後の悪い癌腫とされており、現在の治療法では根治・制御が難しい。そこで、放射線療法の効果改善を目標として、過酸化水素を腫瘍内に局注することによる放射線治療増感効果を期待し、その治療プロトコールについて検討を行っている。腫瘍ボリュームの評価では、過酸化水素局注により一定の増感効果を示すにとどまった。より理想的な局注タイミングを検討するために、局注後早期に腫瘍の活性を評価できる動的核偏極MRIを用いた代謝評価による検討を継続している。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results)

  • [Journal Article] Advances and efficacy in specimen handling for endoscopic ultrasound‐guided fine needle aspiration and biopsy: A comprehensive review2024

    • Author(s)
      Iwashita Takuji、Uemura Shinya、Ryuichi Tezuka、Senju Akihiko、Iwata Shota、Ohashi Yosuke、Shimizu Masahito
    • Journal Title

      DEN Open

      Volume: 4 Issue: 1

    • DOI

      10.1002/deo2.350

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endoscopic ultrasound-guided fine-needle aspiration for pancreatic cystic lesions: a comprehensive review2023

    • Author(s)
      Iwashita Takuji、Uemura Shinya、Shimizu Masahito
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: Online ahead Issue: 2 Pages: 219-226

    • DOI

      10.1007/s10396-023-01389-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The efficacy and safety of modified FOLFIRINOX for unresectable advanced pancreatic cancer in elderly versus young patients: A multicenter retrospective cohort study2022

    • Author(s)
      Tezuka Ryuichi、Iwashita Takuji、Uemura Shinya、Senju Akihiko、Yoshida Kensaku、Maruta Akinori、Iwata Keisuke、Shimizu Masahito
    • Journal Title

      Pancreatology

      Volume: 22 Issue: 8 Pages: 1134-1140

    • DOI

      10.1016/j.pan.2022.11.005

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Micro-RNA Analysis of Pancreatic Cyst Fluid for Diagnosing Malignant Transformation of Intraductal Papillary Mucinous Neoplasm by Comparing Intraductal Papillary Mucinous Adenoma and Carcinoma2021

    • Author(s)
      Shirakami Y, Iwashita T, Uemura S, Imai H, Murase K, Shimizu M.
    • Journal Title

      J Clin Med

      Volume: 10 Issue: 11 Pages: 2249-2249

    • DOI

      10.3390/jcm10112249

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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