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Exploring for the novel treatment targeting the immune function of glioma stem cell

Research Project

Project/Area Number 17K16665
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Neurosurgery
Research InstitutionNihon University

Principal Investigator

YAMAMURO Shun  日本大学, 医学部, 兼任講師 (30790886)

Research Collaborator YOSHINO Atsuo  
OZAWA Yoshinari  
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords膠芽腫 / 免疫療法 / グリオーマ幹細胞 / IDO1 / 悪性神経膠腫 / 神経膠腫幹細胞 / 脳腫瘍 / グリオーマ / 免疫抑制能
Outline of Final Research Achievements

We evaluate the immune function of glioma stem cells, which strongly related to the malignancy of glioblastoma (GBM), via analyzing of Indoleamine 2,3-dioxygenase 1 (IDO1) expression. IDO1, the enzyme for Tryptophan metabolism, is involved in the ability of GBM to escape from immune surveillance, and show immunosuppressive function. We investigated the difference of IDO1 expression between glioma stem cells and normal GBM cells to search a new therapeutic target for GBM. We used human GBM cell lines U251, U87 and patient derived cell lines, and established glioma stem cell like cell lines by culturing those cell lines in serum-free media for 2 weeks. The expression levels of IDO1 in glioma stem cell like cell lines were significantly elevated compared to those in normal GBM cell line. These results indicate that glioma stem cells strongly escape from immune surveillance while producing more IDO1 compared to normal GBM cells, and this system could be a target of the novel GBM treatment.

Academic Significance and Societal Importance of the Research Achievements

膠芽腫は脳腫瘍の中で最も悪性度の高い腫瘍であり、現在の標準治療に加え様々な新規治療が研究開発されているにも関わらず、その予後はいまだに極めて不良である。膠芽腫の悪性度にグリオーマ幹細胞が強く関与していることが知られているが、その性質や治療抵抗性を示すメカニズムに関しては分かっていないことが多い。本研究により、グリオーマ幹細胞が通常の膠芽腫細胞よりもIDO1を多く発現することにより、自己免疫をより強く抑制していることが明らかとなった。このことは、グリオーマ幹細胞の自己免疫抑制能が新たな治療標的になり得ることを示唆しており、膠芽腫の新規治療法を考えるうえで重要な突破口のひとつになると期待される。

Report

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

    (4 results)

All 2020 2018

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

  • [Journal Article] Indolcaminc 2, 3-dioxygcnasc 1 is Highly Exprcsscd in Glioma Stcm Cclls.2020

    • Author(s)
      Yoshinari Ozawa, Shun Yamamuro, Emiko Sano, Juri Tatsuoka, Yuya Hanashima, Sodai Yoshimura, Koichiro Sumi, Hiroyuki Hara, Tomohiro Nakayama, Yutaka Suzuki, Atsuo Yoshino.
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 524 Issue: 3 Pages: 723-729

    • DOI

      10.1016/j.bbrc.2020.01.148

    • Related Report
      Products Report
    • Peer Reviewed / Open Access
  • [Presentation] The alteration of immunosuppressive function in glioblastoma with undifferentiated transformation.2018

    • Author(s)
      Shun Yamamuro, Yuya Hanashima, Sodai Yoshimura, Emiko Sano, Takuya Ueda, Atsuo Yoshino
    • Organizer
      SNO 2018 annual meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 未分化状態のヒト悪性神経膠腫細胞株はindoleamine 2,3-dioxygenaseを高発現している.2018

    • Author(s)
      山室 俊、小澤 祥成、八木 千裕、龍岡 樹里、花島 裕也、吉村 相大、角 光一郎、 佐野 惠海子、上田 卓也、吉野 篤緒
    • Organizer
      第36回日本脳腫瘍学会学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 膠芽腫における未分化性再獲得にともなう自己免疫抑制能の変化.2018

    • Author(s)
      山室 俊、花島 裕也、吉村 相大、角 光一郎、吉野 篤緒
    • Organizer
      第13回脳腫瘍の基礎シンポジウム
    • Related Report
      2018 Annual Research Report

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Published: 2017-04-28   Modified: 2021-07-06  

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