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Assessment of polyacrylic acid-modified titanium peroxide nanoparticles as radiosensitisers

Research Project

Project/Area Number 16K10395
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Radiation science
Research InstitutionKobe University

Principal Investigator

Nakayama Masao  神戸大学, 医学研究科, 医学研究員 (60582004)

Co-Investigator(Kenkyū-buntansha) 江島 泰生  獨協医科大学, 医学部, 准教授 (70423233)
吉田 賢史  神戸大学, 医学部附属病院, 特命准教授 (80351906)
Research Collaborator Akasaka Hiroaki  神戸大学
Morita Kenta  神戸大学
Alsayed Mennaallah  神戸大学
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsナノ粒子 / 放射線治療 / 活性酸素種 / 過酸化水素 / 放射線増感 / チタン酸化物
Outline of Final Research Achievements

Our previous studies indicated that titanium peroxide nanoparticles (TiOxNPs) induced reactive oxygen species (ROS) when expose to X-rays and enhanced radiation cytotoxic effect. In this study, the type and amount of ROS generated from TiOxNPs were investigated and compared to those generated by gold nanoparticles (GNPs). The results showed that the amount of ROS generated from TiOxNPs under X-ray irradiation was less than that of GNPs, however TiOxNPs had the ability to release H2O2 regardless of X-ray irradiation. The released H2O2 is assumed to be acted as a strong radiosensitising agent of TiOxNPs in vitro and in vivo set up. On the other hand, only 12% of the TiOxNPs dose had accumulated in the tumour 1 hour after an intravenous injection in vivo experiment. The liver had the largest accumulation of the injected nanoparticles. Future studies will be required to develop the strategies to enhance the tumour targeting ability of TiOxNPs.

Academic Significance and Societal Importance of the Research Achievements

放射線治療はがん治療において大きな役割を果たしているが、放射線抵抗性をもつ癌細胞に対しては既存の放射線治療では完全に治癒することが難しく、再発例や無効例が多い。その中でナノ粒子は放射線増感効果をもつアプリケーションとして注目されており、金ナノ粒子をはじめ多くのナノ粒子が研究されているものの、いまだ臨床応用には至っていない。その中で過酸化チタンナノ粒子の過酸化水素を除放する性質は、これまでのナノ粒子には例がないものであり、より効果的な放射線増感治療法としてその応用が期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017 2016

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

  • [Journal Article] In vivo tissue distribution and safety of polyacrylic acid-modified titanium peroxide nanoparticles as novel radiosensitizers2018

    • Author(s)
      Morita Kenta、Suzuki Takahiro、Nishimura Yuya、Matsumoto Kazuhisa、Numako Chiya、Sato Kazuyoshi、Nakayama Masao、Sasaki Ryohei、Ogino Chiaki、Kondo Akihiko
    • Journal Title

      Journal of Bioscience and Bioengineering

      Volume: - Issue: 1 Pages: 30749-30751

    • DOI

      10.1016/j.jbiosc.2018.01.012

    • NAID

      40021601146

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Clinical log data analysis for assessing the accuracy of the CyberKnife fiducial-free lung tumor tracking system2018

    • Author(s)
      Nakayama Masao、Nishimura Hideki、Mayahara Hiroshi、Nakamura Masaki、Uehara Kazuyuki、Tsudou Shinji、Harada Aya、Akasaka Hiroaki、Sasaki Ryohei
    • Journal Title

      Practical Radiation Oncology

      Volume: 8 Issue: 2 Pages: 63-70

    • DOI

      10.1016/j.prro.2017.10.014

    • NAID

      120006873065

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Titanium peroxide nanoparticles enhanced cytotoxic effects of X-ray irradiation against pancreatic cancer model through reactive oxygen species generation in vitro and in vivo2016

    • Author(s)
      Masao Nakayama, Ryohei Sasaki, Chiaki Ogino, Tsutomu Tanaka, Kenta Morita, Mitsuo Umetsu, Satoshi Ohara, Zhenquan Tan, Yuya Nishimura, Hiroaki Akasaka, Kazuyoshi Sato, Chiya Numako, Seiichi Takami, Akihiko Kondo
    • Journal Title

      Radiat Oncol.

      Volume: 11(1) Issue: 1 Pages: 91-91

    • DOI

      10.1186/s13014-016-0666-y

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] A novel radiosensitizing method by titanium peroxide nanoparticles (TiOxNPs)2019

    • Author(s)
      Mennaallah Alsayed, Masao Nakayama, Hiroaki Akasaka, Mohammed Salah, Makiko Nakahana, Naritoshi Mukumoto, Kenta Morita, Yuya Nishimura, Chiaki Ogino, Ryohei Sasaki
    • Organizer
      The 7th Japan-Taiwan Radiation Oncology Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reactive oxygen species generated by titanium peroxide nanoparticles as a radiosensitizer compared to gold nanoparticles2018

    • Author(s)
      Masao Nakayama, Hiroaki Akasaka, Chiaki Ogino, Moshi Geso, Ryohei Sasaki
    • Organizer
      Engineering Physical Sciences in Medicine (EPSM) conference 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effectiveness of titanium peroxide nanoparticles as radiosensitizers compared to gold nanoparticles2017

    • Author(s)
      中山雅央、赤坂浩亮、椋本成俊、荻野千秋、西村勇哉、森田健太、佐々木良平
    • Organizer
      日本放射線腫瘍学会 第30回学術大会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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