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

Study for mechanisms of tumor progression by identification of immunosuppressive factors secreted from cancer cells

Research Project

Project/Area Number 17K07219
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Tumor therapeutics
Research InstitutionKyushu University

Principal Investigator

Kano Arihiro  九州大学, 先導物質化学研究所, 准教授 (30403950)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywordsがん / IFN-γ / 免疫抑制 / M-CSF / G-CSF / マクロファージ / がん細胞 / 脾細胞 / TAM / 脾臓 / 腫瘍 / サイトカイン
Outline of Final Research Achievements

Many cancer cells suppress IFN-γ production in splenocytes. Based on this knowledge, identification of these suppressors from conditioned media was carried out. In the results, several proteins were identified as a candidate for a suppressor of IFN-γ production. Additionally, M-CSF: an identified suppressor, and G-CSF: reported as a cause of tumor progression were disrupted by a genome-editing technique. As a result of the comparison of the obtained each disrupted cell, the G-CSF-disrupted cells show a relatively slow growth rate. And the transplanted model in mice showed marked suppressed splenomegaly.

Academic Significance and Societal Importance of the Research Achievements

免疫ががんを監視し、その出現と増大を防ぐ一方、がんはその監視システムから様々な方法で逃れていると考えられている。本研究に先立ち、免疫によるがん排除の最前線を担うT細胞を活性化するIFN-γの産生抑制に関わるタンパク質を、がん細胞が分泌することを見いだした。そこで、がん細胞の培養上清からこの抑制因子の分離同定を行い、複数の候補タンパク質を見いだした。また、既に同定したM-CSF、および既報のG-CSFをゲノム編集技術によってがん細胞から欠損させ、がんの悪性化に及ぼす影響について検証した。本研究の成果は、がんが免疫監視を回避し、悪性化するメカニズムの一端を提案するものである。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] がん細胞分泌性免疫抑制因子の同定による腫瘍悪性化機構の解明2019

    • Author(s)
      狩野有宏
    • Journal Title

      メディカル・サイエンス・ダイジェスト

      Volume: 45 Pages: 16-19

    • Related Report
      2018 Research-status Report
  • [Journal Article] Macrophage Colony-Stimulating Factor mediates its Immunosuppressive Activity through the Emerging Myeloid Cells during Tumor Progression2017

    • Author(s)
      Moses Kamita, Mitsuru Shindo, Arihiro Kano
    • Journal Title

      EVERGREEN

      Volume: 4 Pages: 18-22

    • NAID

      120006466408

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 4T1細胞培養上清中の免疫抑制性因子の探索2019

    • Author(s)
      山下聖人、公せい、新藤充、狩野有宏
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 4T1移植担がんマウスの免疫抑制2018

    • Author(s)
      狩野 有宏、山下 聖人、公 せい、Moses K Kamita、新藤 充
    • Organizer
      日本分子生物学会 第41回日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Role of M-CSF expressed from 4T1 tumor cells in immune activation2018

    • Author(s)
      Jing Gong, Moses Kamita, Mitsuru Shindo, Arihiro Kano
    • Organizer
      2018 IMCE International Symposium
    • Related Report
      2017 Research-status Report
  • [Presentation] M-CSF suppresses IFN-γ secretion in splenocytes of tumor-bearing mice2017

    • Author(s)
      公 せい, Kamita Moses, 新藤 充, 狩野 有宏
    • Organizer
      2017年 生命科学系学会合同年次大会(ConBio2017)
    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi