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Does SLFN11 stratify medulloblastomas to determine the appropriate treatment intensity?

Research Project

Project/Area Number 22K20953
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0906:Surgery related to the biological and sensory functions and related fields
Research InstitutionGunma University

Principal Investigator

Nakata Satoshi  群馬大学, 医学部附属病院, 助教 (10817191)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords髄芽腫 / SLFN11 / 悪性脳腫瘍 / バイオマーカー
Outline of Research at the Start

髄芽腫は小児の小脳に好発する悪性脳腫瘍である. 近年の集学的治療の進歩により予後は改善してきたが, 強力な治療による脳機能低下, 二次癌の発生が新たな問題となっている. 予後良好例を治療前に見つけ出し, 症例ごとに治療強度を選択する個別化医療の必要性が高まっている.
近年, Schlafen (SLFN) ファミリーのメンバーの 1 つ, SLFN11がDNA傷害型抗がん剤の感受性増強因子として注目されている. 本研究では, SLFN11発現量が髄芽腫の治療反応性を予測するバイオマーカーとなり得るか, データベース検索, SLFN11免疫染色, 及び細胞株を用いた機能実験を組み合わせ検討する.

Outline of Final Research Achievements

We have shown in medulloblastoma through comprehensive database analysis and analysis of new samples from multiple centers that 1) SLFN11 alone has prognostic value significantly exceeding 33 existing prognostic factors, and 2) its expression is particularly strong in a group of patients with good prognosis with activation of the WNT signaling pathway. In addition, experiments using patient-derived cell lines and orthotopic xenograft models showed that 3) forced expression or knockout of SLFN11 increases or decreases sensitivity to DNA-disrupting anticancer drugs, respectively, and 4) upregulation of SLFN11 by HDAC inhibitors increases sensitivity to DNA-disrupting anticancer drugs. upregulation of SLFN11 by HDAC inhibitors increases sensitivity to DNA-disrupting anticancer drugs.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果は髄芽腫の実臨床において大きなインパクトがあるものと考えられる。SLFN11発現量は免疫染色で精度良く評価可能であり、今後は個々の髄芽腫症例で術後早期に化学療法の感受性を予測することができる。その上で、SLFN11陽性の化学療法感受例に対しては照射線量を減量し晩期合併症を軽減、SLFN11陰性の化学療法抵抗例に対してはHDAC阻害剤を併用することでDNA傷害型抗がん剤治療への感受性を回復させる、という新たな戦略をとることが可能となる。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (6 results)

All 2024 2023 2022 Other

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

  • [Int'l Joint Research] Johns Hopkins University/NIH/University of Alabama at Birmingham(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Ligue Nationale Contre le Cancer(フランス)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Epigenetic upregulation of Schlafen11 renders WNT- and SHH-activated medulloblastomas sensitive to cisplatin2022

    • Author(s)
      Nakata Satoshi、Murai Junko、Okada Masayasu,,,,,Tateishi Kensuke、Yamashita Shinji、Eberhart Charles G、Natsumeda Manabu
    • Journal Title

      Neuro-Oncology

      Volume: 25 Issue: 5 Pages: 899-912

    • DOI

      10.1093/neuonc/noac243

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] SLFN11 expression and ATR-CHK1 inhibition in medulloblastoma resistant to radiation and DNA damage.2024

    • Author(s)
      中田 聡
    • Organizer
      第13回国際放射線神経生物学会学術大会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Epigenetic upregulation of Schlafen11 renders WNT- and SHH-activated medulloblastomas sensitive to cisplatin2023

    • Author(s)
      中田 聡
    • Organizer
      第12回国際神経放射線生物学会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 髄芽腫におけるSLFN11発現および新たな治療戦略の検討2022

    • Author(s)
      中田 聡
    • Organizer
      第40回脳腫瘍学会
    • Related Report
      2022 Research-status Report

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Published: 2022-09-01   Modified: 2025-01-30  

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