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Molecular profiling of the residual tumor of ovarian cancer after neoadjuvant chemotherapy

Research Project

Project/Area Number 20K18180
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionHoshi University (2022)
National Cancer Center Japan (2020-2021)

Principal Investigator

EBATA TAKAHIRO  星薬科大学, 薬学部, 特任助教 (80769620)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords卵巣がん / DNAメチル化 / LRCOL1 / BRCA1 / 治療抵抗性
Outline of Research at the Start

卵巣がんにおいて治療抵抗性は重要な問題であるが、その機序の大部分はいまだに不明である。本研究では、術前化学療法後の検体には抵抗性の細胞が優位に存在する可能性に着目し、予後及び治療抵抗性に関わる因子の同定とその抵抗性機序を明らかにすることを目的とする。申請者らは既に遺伝子変異、メチル化の網羅的解析を行い、治療抵抗性に関わる候補として5個の遺伝子のメチル化を同定した。本研究期間内にバリデーションを行い、目的遺伝子の抵抗性獲得機序の解明、合成致死をきたす標的を同定することで将来の新規治療開発につなげる。

Outline of Final Research Achievements

We performed comprehensive methylation microarray analysis in 30 high-grade serous ovarian cancer samples and identified candidate genes which could affect treatment response. For validation, we performed mutation and methylation analysis in an additional 45 samples and identifed LRCOL1 methylation as a prognostic marker (p= 0.0028). Accompanying with this research, we also focused on BRCA1 methylation and established new method for the evaluation of BRCA1 methylation level. As a result, BRCA1 methylation was an indepenedent prognostic factor in patients with high-grade serousovarian cancer.

Academic Significance and Societal Importance of the Research Achievements

高悪性度卵巣漿液性腺がんにおける治療効果予測因子の同定は、臨床において患者の予後、治療感受性を推定するうえで重要である。また、LRCOL1のメチル化が卵巣がんにおいてどのような役割を果たしているかを解明することで、新規治療標的の同定につながる可能性がある。また、BRCA1は遺伝子変異が既に確立された予後予測因子であり、既に実臨床で用いられている。遺伝子変異例だけでなくメチル化症例も加えることでより精度の高い予後推定を行える可能性がある。

Report

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

    (4 results)

All 2022 2021 2020

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

  • [Journal Article] DNA methylation of the immediate upstream region of BRCA1 major transcription start sites is an independent favorable prognostic factor in patients with high-grade serous ovarian cancer2022

    • Author(s)
      Ebata Takahiro、Yamashita Satoshi、Takeshima Hideyuki、Yoshida Hiroshi、Kawata Yoshiko、Kino Nao、Yasugi Toshiharu、Terao Yasuhisa、Yonemori Kan、Kato Tomoyasu、Ushijima Toshikazu
    • Journal Title

      Gynecologic Oncology

      Volume: 167 Issue: 3 Pages: 513-518

    • DOI

      10.1016/j.ygyno.2022.10.008

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] DNA methylation marker to estimate ovarian cancer cell fraction2022

    • Author(s)
      Ebata Takahiro、Yamashita Satoshi、Takeshima Hideyuki、Yoshida Hiroshi、Kawata Yoshiko、Kino Nao、Yasugi Toshiharu、Terao Yasuhisa、Yonemori Kan、Kato Tomoyasu、Ushijima Toshikazu
    • Journal Title

      Medical Oncology

      Volume: 39 Issue: 5 Pages: 78-78

    • DOI

      10.1007/s12032-022-01679-y

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] DNA methylation marker to estimate cancer cell fraction2021

    • Author(s)
      Ebata Takahiro
    • Organizer
      分子生物学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Identification of Enhancer Methylation Associated with Treatment Resistance of Ovarian Cancer after Neoadjuvant Chemotherapy2020

    • Author(s)
      江畑貴大
    • Organizer
      日本癌学会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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