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Elucidation of malignant transformation mechanism in IDH-wildtype glioma

Research Project

Project/Area Number 19K16823
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionAkita University

Principal Investigator

Ono Takahiro  秋田大学, 医学系研究科, 講師 (80620690)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsIDH-wild-type glioma / PI3K/MAPK pathway / EGFR amplification / TERT promoter mutation / Gain of chromosome 7 / Loss of chromosome 10 / gain of chromosome 7 / loss of chromosome 10 / IDH / 野生型 / 神経膠腫 / 低悪性度 / 細胞密度 / 乱雑性 / 遺伝子変異 / コピー数解析 / glioma / methylation / mutation / image analysis
Outline of Research at the Start

IDH-wildtype gliomaは最も頻度の高い脳実質内腫瘍で、病理分類上は悪性度が存在せず、須らく最悪性(Grade IV)のglioblastoma(GBM)として扱われる。一方、実臨床ではGBMの前駆状態といえる緩徐増大期の腫瘍(pre-GBM)が数多くみられる。Pre-GBMに何らかのdriver geneの異常が加わって悪性転化するものと推測されるが、GBMとpre-GBMとの組織学的・分子生物学的特徴の差異はこれまで不明であった。
本研究では病理画像のデジタル解析、および摘出検体の分子解析を行い、GBMとpre-GBMの間の決定的な違いを明らかにする。

Outline of Final Research Achievements

IDH-wildtype (IDHwt) gliomas are the most common intramedullary tumors and are classificated into glioblastoma (GBM) according to the current WHO classification. On the other hand, clinically, there are cases with indolent clinical course. In this study, we compared the molecular pathological findings of IDHwt indolent diffuse glioma and typical GBM to explore the clitical factors for malignant transformation. We found that the indolent type tumors lacked the molecular features of GBM, except for MAPK pathway alterations. Such differences were associated with the glioma malignant transformation.

Academic Significance and Societal Importance of the Research Achievements

IDH-wildtype gliomaではMAPK経路、TP53経路、RB経路の活性化のほか、EGFR増幅、TERTプロモーター変異、Chr.7+/10-といった様々な遺伝子異常が報告されている。一方、生物学的に、これらの遺伝子異常が同時多発的に生じるとは考えにくい。
本研究の結果において、IDHwt gliomaは少なくともMAPK経路の活性化単独では悪性化せず、その他のがん化経路の活性化や遺伝子異常との併存によって、悪性化を来すものと考えられた。本腫瘍群の悪性化の機序を解明するうえで、重要な結果であると言える。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Clinical, histopathological, and molecular features of IDH-wildtype indolent diffuse glioma: comparison with typical glioblastoma2022

    • Author(s)
      Suzuki Hayato、Ono Takahiro、Koyota Souichi、Takahashi Masataka、Sugai Tamotsu、Nanjo Hiroshi、Shimizu Hiroaki
    • Journal Title

      Journal of Neuro-Oncology

      Volume: 159 Issue: 2 Pages: 397-408

    • DOI

      10.1007/s11060-022-04074-9

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adult cerebellar glioblastoma categorized into a pediatric methylation class with a unique radiological and histological appearance: illustrative case2022

    • Author(s)
      Ono Takahiro、Hinz Felix、Tanaka Shogo、Takahashi Masataka、Nanjo Hiroshi、von Deimling Andreas、Shimizu Hiroaki
    • Journal Title

      Journal of Neurosurgery: Case Lessons

      Volume: 3 Issue: 14 Pages: 1-5

    • DOI

      10.3171/case2260

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Journal Article] Differentiating between Primary Central Nervous System Lymphoma and Glioblastoma: The Diagnostic Value of Combining <sup>18</sup>F-fluorodeoxyglucose Positron Emission Tomography with Arterial Spin Labeling2021

    • Author(s)
      HATAKEYAMA Junya、ONO Takahiro、TAKAHASHI Masataka、ODA Masaya、SHIMIZU Hiroaki
    • Journal Title

      Neurologia medico-chirurgica

      Volume: 61 Issue: 6 Pages: 367-375

    • DOI

      10.2176/nmc.oa.2020-0375

    • NAID

      130008036135

    • ISSN
      0470-8105, 1349-8029
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 緩徐な臨床経過を示すIDH野生型gliomaの分子生物学的特徴 -膠芽腫との比較-2022

    • Author(s)
      小野隆裕、鈴木隼士、小代田宗一、高橋和孝、菅井有、南條博、清水宏明
    • Organizer
      第81回日本脳神経外科学会学術総会
    • Related Report
      2022 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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