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Targeting the Serine Synthesis Pathway as a Potential Novel Bladder Cancer Therapy and the elucidation of its Expression Mechanism

Research Project

Project/Area Number 20K18146
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56030:Urology-related
Research InstitutionKagoshima University

Principal Investigator

OSAKO Yoichi  鹿児島大学, 医歯学総合研究科, 客員研究員 (60793354)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords膀胱癌 / PHGDH / 治療抵抗性 / セリン / メチル化
Outline of Research at the Start

PHGDHは解糖系の基質をセリン合成経路へ変換するが、膀胱癌の臨床統計解析で、PHGDHの発現は悪性度に相関し、更にPHGDHは独立した予後不良因子であることが分かった。一方、PHGDHの遺伝子発現の変化やその制御に関して殆ど知られていない。そこで、膀胱癌におけるPHGDHを標的とした新規治療法の可能性の探索と同時に、PHGDHの発現機序の解明を本研究の目的とした。

Outline of Final Research Achievements

We previously identified that PHGDH, which converts glycolytic substrates to the serine synthesis pathway, is activated in treatment-resistant cancers, and we reported that metabolic reprogramming contributes to the acquisition of treatment resistance. On the other hand, in a clinical statistical analysis of bladder cancer, PHGDH expression was correlated with malignancy, and PHGDH was found to be an independent poor prognostic factor. Therefore, the purpose of this study was to elucidate the mechanism of PHGDH expression as well as to explore the possibility of novel therapeutic strategies targeting PHGDH in bladder cancer.

Academic Significance and Societal Importance of the Research Achievements

我々は、膀胱癌細胞株を用いて、PHGDHのsi-RNAや阻害剤を投与したところアポトーシスを介した腫瘍抑制効果をin vitro並びにin vivoにおいて示した。更にPHGDHの発現にメチル化が関係していることを初めて示した。これらの結果より、膀胱癌におけるPHGDHを標的とした新規治療の可能性とPHGDHの発現機序の一端を報告することができた。更に、当科で樹立したgemcitabine並びにcisplatin耐性膀胱癌細胞株を調べたところ、それらの耐性細胞においてPHGDHの発現が亢進していることが確認され、膀胱癌の治療抵抗性獲得に代謝リプログラミングが寄与することが示唆された。

Report

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

    (7 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (4 results)

  • [Journal Article] microRNA-99a-5p induces cellular senescence in gemcitabine-resistant bladder cancer by targeting SMARCD1.2022

    • Author(s)
      Motoki Tamai, Shuichi Tatarano, Shunsuke Okamura, Wataru Fukumoto, Issei Kawakami, Yoichi Osako, Takashi Sakaguchi, Satoshi Sugita, Masaya Yonemori, Yasutoshi Yamada, Masayuki Nakagawa, Hideki Enokida, Hirofumi Yoshino.
    • Journal Title

      Molecular Oncology

      Volume: 16 Issue: 6 Pages: 1329-1346

    • DOI

      10.1002/1878-0261.13192

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] EHHADH contributes to cisplatin resistance through regulation by tumor-suppressive microRNAs in bladder cancer2021

    • Author(s)
      Okamura Shunsuke、Yoshino Hirofumi、Kuroshima Kazuki、Tsuruda Masafumi、Osako Yoichi、Sakaguchi Takashi、Yonemori Masaya、Yamada Yasutoshi、Tatarano Shuichi、Nakagawa Masayuki、Enokida Hideki
    • Journal Title

      BMC Cancer

      Volume: 21 Issue: 1 Pages: 48-48

    • DOI

      10.1186/s12885-020-07717-0

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characterization of PHGDH expression in bladder cancer: potential targeting therapy with gemcitabine/cisplatin and the contribution of promoter DNA hypomethylation2020

    • Author(s)
      Hirofumi Yoshino, Hideki Enokida, Yoichi Osako, Nijiro Nohata, Masaya Yonemori, Satoshi Sugita, Kazuki Kuroshima, Masafumi Tsuruda, Shuichi Tatarano, Masayuki Nakagawa.
    • Journal Title

      Molecular Oncology

      Volume: 54 Issue: 9 Pages: 2190-2202

    • DOI

      10.1002/1878-0261.12697

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] PHGDHを標的とした新規膀胱癌治療の可能性とその発現機構の解明2021

    • Author(s)
      吉野裕史、大迫洋一、鶴田雅史、黒島和樹、岡村俊介、榎田英樹、中川昌之
    • Organizer
      第109回日本泌尿器科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] PHGDHを標的とした新規膀胱癌治療の可能性とその発現機構の解明2021

    • Author(s)
      吉野裕史, 大迫洋一, 鶴田雅史, 黒島和樹, 岡村俊介, 榎田英樹, 中川昌之.
    • Organizer
      第30回泌尿器科分子・細胞研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 膀胱癌におけるmicroRNA-486-5pの発現低下は脂肪酸代謝を介してシスプラチン耐性へ誘導する2020

    • Author(s)
      岡村 俊介, 吉野 裕史, 榎田 英樹, 中川 昌之.
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] シスプラチン耐性膀胱癌に対する治療標的型microRNAと標的遺伝子の探索2020

    • Author(s)
      岡村 俊介, 吉野 裕史, 大迫 洋一, 黒島 和樹, 鶴田 雅史, 榎田 英樹, 中川 昌之.
    • Organizer
      第108回日本泌尿器科学会総会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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