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Elucidation of the developmental mechanism of prostate neuroendocrine cancer using microRNA expression analysis

Research Project

Project/Area Number 20K09586
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56030:Urology-related
Research InstitutionTeikyo University

Principal Investigator

KOJIMA SATOKO  帝京大学, 医学部, 客員准教授 (10345019)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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去勢抵抗性前立腺癌 / マイクロRNA / IGFBP-3 / 神経内分泌癌 / マイクロRNA / 前立腺癌 / 新規ホルモン療法薬
Outline of Research at the Start

我々は、これまでmicroRNAを起点に、去勢抵抗性前立腺癌の発生機序や進展経路に関わる分子経路を探索し、その活性化経路を遮断することによりCRPCに対する新規治療戦略を研究してきた。CRPCの治療を継続すると、最終的にホルモン療法に抵抗性で難治性のCRPC, 場合によってはPSAの上昇を認ない状態で、内臓転移を生じる場合あがある。その病態のひとつとして注目されるのが、神経内分泌版である。本研究は、前立腺癌神経内分泌癌における診断マーカーの同定および新規治療標的となりうる分子を同定することを目的とする。

Outline of Final Research Achievements

Prostate cancer is usually a hormone-sensitive cancer that responds well to androgen deprivation therapy, but over time it becomes a hormone-resistant cancer, and its causes and mechanisms are still under investigation.In recent years, it has been found that among functional RNA molecules, microRNAs (microRNAs) play an important role as tumor suppressor genes even in prostate cancer.
So far, we have discovered that miR-455-5p suppresses the expression of tumor suppressor genes such as Pirin, IGFBP-3, and LRP8, and promotes prostate cancer proliferation and invasion. In this study, the expression of IGFBP-3 was examined by immunostaining in advanced prostate cancer, and it was shown that those with high expression were associated with poor prognosis. A tendency for IGHFB-3 expression to become stronger after castration-resistant prostate cancer was observed, suggesting a mechanism contributing to the progression of prostate cancer.

Academic Significance and Societal Importance of the Research Achievements

前立腺癌は早期癌であれば長期の予後が得られるが、再発再燃する場合がある。前立腺癌は通常ホルモン感受性癌で、アンドロゲン除去療法によく奏功するが、治療を長期に続けるにつれてホルモン抵抗性の癌になる。転移性前立腺癌の予後は、治療開始からホルモン再燃癌(去勢抵抗性前立腺癌)になるまで2年程度であったが、近年、新規ホルモン療法薬や抗癌剤の適応により、3~5年と以前に比べて再燃までの期間が延長され、長期の予後が期待されるようになった。しかし、いずれの治療も奏功せず、2~3年以内に死亡する症例も少なからず存在する。本研究で新たな分子学的アプローチが解明されればさらなる前立腺癌の予後の改善が期待できる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2023 2022 2021 2020

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (2 results)

  • [Journal Article] Efficacy and Safety of Tolvaptan for Patients with Autosomal Dominant Polycystic Kidney Disease in Real-world Practice: A Single Institution Retrospective Study2023

    • Author(s)
      Hiroshi Masuda 1, Nobuhiko Shimizu 2, Keita Sekine 2, Atsushi Okato 2, Kyokusin Hou 2, Takahito Suyama 2, Kazuhiro Araki 2, Satoko Kojima 2, Yukio Naya 2
    • Journal Title

      In Vivo

      Volume: 37 Issue: 2 Pages: 801

    • DOI

      10.21873/invivo.13144

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Laparoscopic redo pyeloplasty with a buccal mucosal graft2022

    • Author(s)
      Shimizu N, Naya Y, Sekine K, Hou K, Okato A, Suyama T, Araki K, Masuda H, Kojima S.
    • Journal Title

      IJU Case Rep.

      Volume: 6 Issue: 2 Pages: 124

    • DOI

      10.1002/iju5.12567

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The choice of therapeutic agent in female overactive bladder patients in real-world practice2022

    • Author(s)
      Masuda H, Mikami K, Otsuka K, Hou K, Suyama T, Araki K, Kojima S, Naya Y.
    • Journal Title

      .Arch Ital Urol Androl.

      Volume: 94 Issue: 4 Pages: 451

    • DOI

      10.4081/aiua.2022.4.451

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Outcomes of dutasteride discontinuation in patients with benign prostatic hypertrophy2022

    • Author(s)
      Masuda H, Mikami K, Otsuka K, Hou K, Suyama T, Araki K, Kojima S, Naya Y.
    • Journal Title

      Arch Ital Urol Androl.

      Volume: 94 Issue: 4 Pages: 521

    • DOI

      10.4081/aiua.2022.4.521

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adult Prepubertal-Type Teratoma Diagnosed Using Fish Analysis : A Case Report2021

    • Author(s)
      Mikami K, Kojima S, Shimizu N, Otsuka K, Hou K, Suyama T, Araki K, Masuda H, Fugo K, Yamazaki K, Naya Y.
    • Journal Title

      泌尿器科紀要

      Volume: 67 Issue: 10 Pages: 471-474

    • DOI

      10.14989/ActaUrolJap_67_10_471

    • NAID

      40022725190

    • ISSN
      0018-1994
    • Year and Date
      2021-10-31
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] High Serum Alkaline Phosphatase Flare after First-Line Androgen Deprivation Therapy Predicts Poor Prognosis in Metastatic Prostate Cancer Patients Treated with Second-Generation Androgen Receptor Targeted Therapy2021

    • Author(s)
      Satoko Kojima, Hiroshi Masuda, Takahito Suyama, Kyokushin Hou, Kousuke Mikami, Kazuhiro Araki, and Yukio Naya
    • Journal Title

      Prostate Cancer

      Volume: 2021 Pages: 1-6

    • DOI

      10.1155/2021/5574067

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] False-positive (123)I-metaiodobenzylguanidine scan in a patient with renal cell carcinoma: A case of chromophobe renal cell carcinoma oncocytic variant with a complicated clinical course2020

    • Author(s)
      Suyama, T. Kanesaka, M. Fujimoto, A. Otsuka, K. Hou, K. Araki, K. Masuda, H. Kojima, S. Yamazaki, K. Naya, Y.
    • Journal Title

      IJU Case Rep

      Volume: 4 Issue: 1 Pages: 39-42

    • DOI

      10.1002/iju5.12233

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Replisome genes regulation by antitumor miR-101-5p in clear cell renal cell carcinoma2020

    • Author(s)
      Yamada Yasutaka、Nohata Nijiro、Uchida Akifumi、Kato Mayuko、Arai Takayuki、Moriya Shogo、Mizuno Keiko、Kojima Satoko、Yamazaki Kazuto、Naya Yukio、Ichikawa Tomohiko、Seki Naohiko
    • Journal Title

      Cancer Science

      Volume: 111 Issue: 4 Pages: 1392

    • DOI

      10.1111/cas.14327

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ALP flareのmCRPC治療効果予測因子としての意義2021

    • Author(s)
      小島 聡子, 三神 功亮, 大塚 耕太郎, 清水 信彦, 芳生 旭辰, 巣山 貴仁, 荒木 千裕, 増田 広 , 納谷 幸男
    • Organizer
      第109回日本泌尿器科学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] Low-volumeの転移性前立腺癌に対する原発巣への放射線照射の有用性2020

    • Author(s)
      小島聡子、横川徳造、三神功亮、大塚耕太郎、芳生旭辰、巣山貴仁、荒木千裕、増田広、納谷幸男
    • Organizer
      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: 2025-01-30  

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