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Molecular targets to suppress microenvironment changes and invasive cancer recurrence after radiotherapy

Research Project

Project/Area Number 16K10380
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Nam JinMin  北海道大学, 国際連携研究教育局, 講師 (60414132)

Co-Investigator(Kenkyū-buntansha) 森岡 裕香  北海道大学, 遺伝子病制御研究所, 講師 (00360264)
Research Collaborator ONODERA Yasuhito  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords放射線 / 癌浸潤 / 小胞輸送 / インテグリン / がん微小環境 / がん細胞 / 浸潤 / 癌
Outline of Final Research Achievements

Integrins regulation and microenvironment changes are involved in cancer cell survival, invasion and metastasis. Radiation can remodel the microenvironment by secreted molecules which contribute to radioresistance and enhancing invasive activity in cancer cells. In this study, we focused on microenvironment after radiation treatment, and analyzed molecular mechanisms of invasive recurrence after radiotherapy. We found that intergrin-binding radiation sensitizer decreased cancer cell survival and invasive activity after radiation in breast cancer cells. In addition, our data suggest that lysosomes function and trafficking are involved in invasive activity after radiation treatment.

Academic Significance and Societal Importance of the Research Achievements

近年、多くの種類のがん治療に放射線が用いられており、放射線治療により予後が高くなることが報告されている。一方、副作用の軽減や治療効果の向上のために、治療に使用する照射線量を低くする目的での放射線増感剤の探索や、浸潤癌再発・転移の抑制を目指した分子メカニズム解明が必要とされ、放射線生物学的な基礎研究の発展が急務である。学術的意義:放射線照射後、細胞外微小環境の変化に関わる、細胞内の小胞輸送と浸潤性に関連した分子メカニズムの一端を見出した。社会的意義:がん細胞の放射線への耐性に関わる研究成果から、将来、放射線治療の発展に役立つ可能性が期待できる。

Report

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

    (8 results)

All 2018 2017 2016 Other

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

  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Targeting integrins with RGD-conjugated gold nanoparticles in radiotherapy decreases the invasive activity of breast cancer cells.2017

    • Author(s)
      Wu PH, Onodera Y, Ichikawa Y, Rankin EB, Giaccia AJ, Watanabe Y, Qian W, Hashimoto T, Shirato H, Nam JM.
    • Journal Title

      Int J Nanomedicine.

      Volume: 14 Pages: 5069-5085

    • DOI

      10.2147/ijn.s137833

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hypoxia: Signalingthe Metastatic Cascade2016

    • Author(s)
      Rankin EB, Nam JM, Giaccia AJ
    • Journal Title

      Trends in Cancer

      Volume: 2 Issue: 6 Pages: 295-304

    • DOI

      10.1016/j.trecan.2016.05.006

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 乳癌細胞における放射線照射後のリソソームのエキソサイトーシスと浸潤能亢進2018

    • Author(s)
      呉秉修、小野寺康仁、白土博樹、南ジンミン
    • Organizer
      第77回日本癌学会学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Radiation increases invasive activity of breast cancer cells via altering lysosome exocytosis2018

    • Author(s)
      Wu PH, Onodera Y, Giaccia AJ, Le QT, Shirato H, Nam JM
    • Organizer
      AACR Annual Meeting 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Targeting integrins with RGD-conjugated gold nanoparticles in radiation therapy2017

    • Author(s)
      Wu PH, Onodera Y, Ichikawa Y, Rankin EB, Giaccia AJ, Watanabe Y, Qian W, Hashimoto T, Shirato H, Nam JM
    • 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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