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Exploring novel therapeutic strategies for treatment-resistant bladder cancer using miRNAs in exosomes as a starting point

Research Project

Project/Area Number 21K09430
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

YAMADA Yasutoshi  鹿児島大学, 医歯学域鹿児島大学病院, 准教授 (40437968)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords膀胱癌 / 治療抵抗 / エクソソーム / miRNA / 治療抵抗性
Outline of Research at the Start

細胞外小胞の一つであるエクソソームエクソソームの中にはmRNAやmiRNAといった核酸やタンパク質などが含まれ、癌においてはその分泌が増加し癌微小環境を構築することが明らかになりつつある。本研究では、治療抵抗性膀胱癌におけるエクソソーム中miRNAを起点とした耐性獲得機序を明らかにし、新規治療戦略や診断・予後予測マーカーの探索を提案する。エクソソーム中miRNAを起点とした膀胱癌研究の新たな展開により、耐性克服薬の開発や診断・予後予測マーカーの開発に繋がるデータを得ることが期待される。予後予測マーカーを提示できれば、患者の選別化にも繋がり膀胱癌の治療費抑制にも貢献できると考える。

Outline of Final Research Achievements

As a result of this study, we performed RNA sequencing analysis using patient-derived bladder urothelial carcinoma (n=3), bladder cancer CIS (n=3), and renal pelvis ureteral urothelial carcinoma (n=3) serum exosomal RNAs and confirmed that the aspect of exosome-containing nucleic acids was completely different in urothelial carcinoma compared with normal samples. Next, we focused on BYCRN1, one of the LncRNAs among the candidate nucleic acids, and investigated its expression in serum exosomal RNA, and found that its expression was significantly increased in patients with urothelial carcinoma compared to healthy controls. Furthermore, knockdown of BYCRN1 showed an antitumor effect, and when expression was examined in pre- and postoperative samples, expression decreased after surgery. These results are summarized in the paper.

Academic Significance and Societal Importance of the Research Achievements

現在、臨床的に感度・特異度ともに有用な尿路上皮癌(腎盂尿管癌および膀胱癌)の腫瘍マーカーは無く、患者は放射線被曝を伴うCT検査や侵襲の大きな尿管鏡検査や膀胱鏡検査が一般的に行われている。そこで、エクソソーム含有核酸を用いて尿路上皮癌に対する腫瘍マーカーとなる核酸を検出することを本研究の目的としたが、我々の研究成果は血清エクソソーム中のBCYRN1が尿路上皮癌患者で有意に高く、また術後に発現が低下した。更にBCYRN1をノックダウンすることで抗腫瘍効果が得られることを確認し、エクソソーム中RNAを起点とした治療抵抗性膀胱癌に対する新規治療戦略の一歩を踏み出したと考える。

Report

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

    (5 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (1 results)

  • [Journal Article] Potential therapeutic target secretogranin II might cooperate with hypoxia‐inducible factor 1α in sunitinib‐resistant renal cell carcinoma2023

    • Author(s)
      Fukumoto Wataru、Yoshino Hirofumi、Horike Shin‐Ichi、Kawakami Issei、Tamai Motoki、Arima Junya、Kawahara Ichiro、Mitsuke Akihiko、Sakaguchi Takashi、Inoguchi Satoru、Meguro‐Horike Makiko、Tatarano Shuichi、Enokida Hideki
    • Journal Title

      Cancer Science

      Volume: 114 Issue: 10 Pages: 3946-3956

    • DOI

      10.1111/cas.15914

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characterization and treatment of gemcitabine‐ and cisplatin‐resistant bladder cancer cells with a pan‐RAS inhibitor2023

    • Author(s)
      Yoshino Hirofumi、Yokoyama Seiya、Tamai Motoki、Okamura Shunsuke、Iizasa Sayaka、Sakaguchi Takashi、Osako Yoichi、Inoguchi Satoru、Matsushita Ryosuke、Yamada Yasutoshi、Nakagawa Masayuki、Tatarano Shuichi、Tanimoto Akihide、Enokida Hideki
    • Journal Title

      FEBS Open Bio

      Volume: 13 Issue: 6 Pages: 1056-1066

    • DOI

      10.1002/2211-5463.13616

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Exosomal microRNA-1 and MYO15A as a target for therapy and diagnosis in renal cell carcinoma2022

    • Author(s)
      Yoshino Hirofumi、Tatarano Shuichi、Tamai Motoki、Tsuruda Masafumi、Iizasa Sayaka、Arima Junya、Kawakami Issei、Fukumoto Wataru、Kawahara Ichiro、Li Gang、Sakaguchi Takashi、Inoguchi Satoru、Yamada Yasutoshi、Enokida Hideki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 630 Pages: 71-76

    • DOI

      10.1016/j.bbrc.2022.09.056

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Targeting of the glutamine transporter SLC1A5 induces cellular senescence in clear cell renal cell carcinoma2022

    • Author(s)
      Issei Kawakami, Hirofumi Yoshino, Wataru Fukumoto, Motoki Tamai, Shunsuke Okamura, Yoichi Osako, Takashi Sakaguchi, Satoru Inoguchi, Ryosuke Matsushita, Yasutoshi Yamada, Shuichi Tatarano, Masayuki Nakagawa, Hideki Enokida.
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: - Pages: 99-106

    • DOI

      10.1016/j.bbrc.2022.04.068

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Role of exosomal antitumor microRNA-1 in renal cell carcinoma2021

    • Author(s)
      Hirofumi Yoshino, Motoki Tamai, Issei Kawakami, Hideki Enokida.
    • Organizer
      第59回日本癌治療学会学術集会
    • Related Report
      2021 Research-status Report

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

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