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The development of a novel biomarker to early detect high grade serous carcinoma of ovary.

Research Project

Project/Area Number 22K20973
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 InstitutionOsaka University

Principal Investigator

Yamamoto Misa  大阪大学, 大学院医学系研究科, 招へい教員 (50962875)

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卵巣がん / 環状RNA / 高異型度漿液性癌 / バイオマーカー / circESRP1 / デジタルPCR / p53 / 高異型度漿液性卵巣癌 / 子宮内膜症関連卵巣癌 / 遊離DNA / TP53変異
Outline of Research at the Start

卵巣癌のような難治性癌の克服には、早期発見につながるバイオマーカーの確立が必要である。本研究では、卵巣癌の早期発見を目指し、血漿中に僅かに存在するがん由来の遊離 DNA (cell-free DNA (cfDNA)) のバイオマーカーとしての可能性を検証する。具体的には卵巣癌の約40%をしめる高異型度漿液性卵巣癌(HGSOC)の90%以上にTP53変異があることに着目し、デジタル PCR 法により、患者血漿におけるTP53 変異の同定を目指し、そのバイオマーカーとしての可能性を検証する。以上の検討を通じて、HGSOC患者に対する新たなリキッドバイオプシー法を確立したいと考えている。

Outline of Final Research Achievements

Our current research focused on identifying highly elevated circular RNAs (circRNA)s in high grade serous carcinoma of ovary (HGSOC) and elucidating their roles. CircRNA microarray analysis were performed using two HGSOC clinical samples. Their expression profiles were validated across 24 clinical HGSOC samples. To assess the functions of identified circRNAs in HGSOC, in-vitro analyses were executed following siRNA transfection. Further, proteosome analyses were performed and the mechanism how this circRNA works was identified.
CircESRP1 was identified as the most highly expressed circRNA. Significant upregulation was seen across HGSOC clinical samples and cell lines. Its suppression resulted in the inhibition of cell proliferation followed by apoptosis. Proteosome analyses revealed the suppression of circESRP1 inhibited CDK1 expression in cell lines, and in silico analyses showed circESRP1 works as a sponge of mir-182-5p, and thereby this miRNA negatively regulates CDK1 expression.

Academic Significance and Societal Importance of the Research Achievements

卵巣癌の組織型の中でも最多の約40%を占める高異型度漿液性卵巣癌(HGSOC)と対側の正常卵巣より RNA を抽出し、circular RNA microarray を行い、HGSOC 特異的に発現が亢進している環状 RNA であるcircESRP1を同定し、その役割を解明した。HGSOC における環状 RNA の新しい意義および治療標的としての可能性を証明し、早期発見につながる新たなリキッドバイオプシー法を確立するとともに、新たな分子標的治療の可能性を提示した。得られた成果は2024年の第76回日本産科婦人科学会学術講演会で口演発表した。今後論文作成予定である。

Report

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

    (1 results)

All 2024

All Presentation (1 results)

  • [Presentation] CircESRP1 promotes cell proliferation of high-grade serous ovarian cancers(HGSOC)via miR-142-3p/HMGA2 pathway2024

    • Author(s)
      Tadashi Oride, Kenjiro Sawada, Yukako Oi, Aska Toda, Koji Nakamura, Mahiru Kawano, Yasuto Kinose, Michiko Kodama, Kae Hashimoto, Tadashi Kimura
    • Organizer
      第76回日本産科婦人科学会学術講演会
    • Related Report
      2023 Annual Research Report

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

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