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Development of a novel method for diagnosis and therapy of bladder cancer using miRNA-146a-5p and its functional analysis

Research Project

Project/Area Number 21K16759
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56030:Urology-related
Research InstitutionSt. Marianna University School of Medicine

Principal Investigator

Usuba Wataru  聖マリアンナ医科大学, 医学部, 助教 (90867649)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsmiR-146a-5p / 膀胱癌 / エクソソーム / TET2 / 膀胱腔内注入療法 / 血管新生 / 診断マーカー / miRNA-146a-5p
Outline of Research at the Start

再発・病期進展の可能性が高い筋層非浸潤性膀胱癌に対する新規診断法と膀胱内注入療法の確立を目指し、尿中エクソソームに内包されているmiR-146a-5pを新規バイオマーカーとして確立するとともに、膀胱癌組織における血管新生やサイトカインとの関連を検証する。また、網羅的発現解析により膀胱癌における血管新生に関連するmiR-146a-5p の標的遺伝子を同定する。さらにin vivo研究にてmiR-146a-5pが膀胱癌の増殖を制御するメカニズムを解明し、癌の進展や悪性化への寄与を明らかにする。最終的にはmiR-146a-5pおよびその標的遺伝子を用いて新規の膀胱癌治療法の確立を目指す。

Outline of Final Research Achievements

Focusing on miR-146a-5p, which is upregulated in the urine of bladder cancer patients, we conducted research to elucidate the mechanism of action of miR-146a-5p on bladder cancer and to apply it to novel therapeutic methods.
As a target gene of miR-146a-5p, TET2 was identified by microarray gene expression analysis. In vitro experiments using bladder cancer cells and vascular endothelial cells showed that TET2 promotes angiogenesis of bladder cancer via c-Myc. Suppression of TET2 by miR-146a-5p in a mouse model promotes tumor growth and angiogenic potential of bladder cancer. Kaplan-Meier survival analysis of bladder cancer patients showed that low TET2 expression and/or high c-Myc expression were poor prognostic factors.
These results suggest that miR-146a-5 may be useful as a therapeutic target for bladder cancer.

Academic Significance and Societal Importance of the Research Achievements

miRNAは1種類で同じパスウェイに存在する複数の遺伝子を標的とすることができる。よって強固な機能抑制が期待できるため、miRNAはsiRNAと比べ新規治療標的として効果的である。今回の研究ではmiR-146a-5pが膀胱癌の成長を促進することが示された。この結果を用いてmiR-146a-5pの膀胱内注入療法を確立し発現制御が可能となれば、これまでにない新規・再発治療法の早期実現に繋がり、さらにmiR-146a-5pにより制御を受ける他癌腫に対しての効果も期待できる。

Report

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

    (4 results)

All 2023 2022

All 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: 1 results)

  • [Journal Article] High‐grade bladder cancer cells secrete extracellular vesicles containing miRNA‐146a‐5p and promotes angiogenesis2022

    • Author(s)
      Prieto‐Vila Marta、Usuba Wataru、Yoshioka Yusuke、Takeshita Fumitaka、Yoshiike Miki、Sasaki Hideo、Yamamoto Yusuke、Kikuchi Eiji、Ochiya Takahiro
    • Journal Title

      Journal of Extracellular Biology

      Volume: 1 Issue: 8

    • DOI

      10.1002/jex2.47

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 尿中CD55/CD9共陽性エクソソームは膀胱癌の新規診断バイオマーカーかつ予後進展に関与する2023

    • Author(s)
      薄場渉, 吉池美紀, 荒武里衣, 吉岡祐亮, 山田龍治, 早川望, 落谷孝広, 菊地栄次
    • Organizer
      第110回日本泌尿器科学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 膀胱がんにおける尿中エクソソームの表面抗原CD55・CD9と内包物質miR-146a-5pのバイオマーカーとしての検討.2023

    • Author(s)
      薄場渉, 吉池美紀, 荒武里衣, 吉岡祐亮, 山田龍治, 早川望, 落谷孝弘, 菊地栄次.
    • Organizer
      第32回泌尿器科分子・細胞研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] CD55 positive exosomes as a novel urinary biomarker for bladder cancer.2022

    • Author(s)
      Hayakawa Nozomi, Yamada Ryuji, Aratake Satoe, Yoshiike Miki, Usuba Wataru, Yoshioka Yusuke, Ochiya Takahiro, Kikuchi Eiji.
    • Organizer
      19th Urological Association of Asia Congress
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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