• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Application of the degradation system for ETV1 to prostate cancer therapy

Research Project

Project/Area Number 19K18613
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

WATANABE RYUTA  愛媛大学, 医学部附属病院, 助教 (00813635)

Project Period (FY) 2020-03-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords前立腺癌 / SPOP / TMPRSS-ERG融合遺伝子 / ETV1 / DNA修復 / TOP2A / TOP阻害剤 / TDP1/2 / SPOP遺伝子 / TMPRSS2-ERG融合遺伝子 / ゲノム不安定性 / 体細胞変異 / CUL3 / 遺伝子変異 / topoisomerase2 / PARP阻害剤 / エトポシド / 前立腺癌関連SPOP変異 / 蛋白質分解 / 分解制御剤
Outline of Research at the Start

前立腺癌患者では変異型ETV1のタンパク質発現が亢進し、細胞の癌化へと導く。しかし、ETV1のタンパク質量の制御機構は未解明のままである。申請者は最近、CUL3/SPOPユビキチンE3複合体の基質タンパク質探索の中で、ETV1がその候補分子である事を突き止めた。本研究では、CUL3/SPOP複合体によるETV1の詳細な分解制御機構を解明し、当該複合体を標的とした変異型ETV1の分解促進剤を導出する。具体的には、ETV1のCUL3/SPOPによる分解制御を細胞レベルで質量分析で実証する。更に、前立腺癌患者で検出されている変異型ETV1がSPOP認識部位を保持しているか否かを細胞レベルで検証する。

Outline of Final Research Achievements

SPOP is the most frequently mutated gene in prostate cancer patients (10-15%), and regulates ubiquitination and degradation of substrate proteins. More than 30 substrate proteins, represented by AR and ERG, have been identified.We detected ETV1, which forms a fusion gene with TMPRSS2 as in ERG, as a candidate substrate protein by alpha screen analysis. However, no evidence was obtained that ETV1 is a substrate protein of SPOP. On the other hand, we found that SPOP promotes prostate cancer progression by inducing genomic instability through TOP2A. Furthermore, we found that TOP inhibitors and PARP inhibitors may be effective for patients with SPOP-mutant prostate cancer.

Academic Significance and Societal Importance of the Research Achievements

SPOP変異はARを代表とする基質蛋白質の蓄積の結果、前立腺癌を進行に導くとされてきた。我々の研究により、SPOP変異はTOP2Aを介してゲノム不安定性を誘導することで前立腺癌を増悪させることを明らかにした。過去にTMPRSS2-ERG融合遺伝子がTOP2B-AR複合体によるゲノム不安定性にて形成されることが報告されており、今回SPOP変異経路とTMPRSS2-ERG融合遺伝子経路という相互排他的な2経路が前立腺癌において存在することを突き止めた。これらの経路を理解することで、今後TOP阻害剤、PARP阻害剤、SPOP阻害剤といった治療薬のプレシジョンメディシンにつながる可能性が期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Annual Research Report
  • Research Products

    (12 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] SPOP is essential for DNA-protein crosslink repair in prostate cancer cells: SPOP-dependent removal of topoisomerase 2A from the topoisomerase 2A-DNA cleavage complex.2020

    • Author(s)
      Watanabe R, Maekawa M, Hieda M, Taguchi T, Miura N, Kikugawa T, Saika T, Higashiyama S.
    • Journal Title

      Mol Biol Cell

      Volume: 31 Issue: 6 Pages: 478-490

    • DOI

      10.1091/mbc.e19-08-0456

    • Related Report
      2020 Research-status Report 2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Roles of SPOP in DNA Damage Response and DNA Replication2020

    • Author(s)
      Maekawa Masashi、Higashiyama Shigeki
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 21 Issue: 19 Pages: 7293-7293

    • DOI

      10.3390/ijms21197293

    • Related Report
      2020 Research-status Report
  • [Presentation] PSMA-positive membranes secreted from prostate cancer cells have potency to transform vascular endothelial cells into an angiogenic state2022

    • Author(s)
      Ryuta Watanabe
    • Organizer
      AARC 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of PSMA-positive membranes secreted from prostate cancer cells on vascular endothelial cells2022

    • Author(s)
      Ryuta Watanabe
    • Organizer
      ASCO-GU2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The novel role of SPOP in regulating topoisomerase 2A in prostate cancer cells as a potential therapeutic marker for DNA repair targeted therapy2021

    • Author(s)
      渡辺隆太
    • Organizer
      西日本泌尿器科学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] LNCaP cellsから放出されるPSMA陽性vesicleが 血管内皮細胞の血管新生能を亢進する2021

    • Author(s)
      渡辺隆太
    • Organizer
      泌尿器腫瘍学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 愛媛大学における神経内分泌前立腺癌の 治療経験と病理学的考察2021

    • Author(s)
      渡辺隆太
    • Organizer
      前立腺シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 前立腺癌細胞のtopoisomerase2A制御におけるSPOPの新規機能解明とDNA修復標的治療の治療マーカーとしての可能性2021

    • Author(s)
      渡辺隆太
    • Organizer
      泌尿器分子細胞研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] The novel role of SPOP in regulating topoisomerase 2A in prostate cancer cells as a potential therapeutic marker for DNA repair targeted therapy2020

    • Author(s)
      Ryuta Watanabe
    • Organizer
      2020 AUA annual meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 前立腺癌細胞のtopoisomerase2A制御における SPOPの新規機能解明と DNA修復標的治療の治療マーカーとしての可能性2020

    • Author(s)
      渡辺 隆太
    • Organizer
      第29回泌尿器科分子細胞研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 前立腺癌細胞のtopoisomerase2A制御における SPOPの新規機能解明と DNA修復標的治療の治療マーカーとしての可能性2020

    • Author(s)
      渡辺 隆太
    • Organizer
      第108回日本泌尿器科学会総会
    • Related Report
      2020 Research-status Report
  • [Presentation] A novel function of a prostate cancer-associated SPOP mutant in topoisomerase 2A-dependent DNA-protein crosslink repair2020

    • Author(s)
      前川 大志
    • Organizer
      第79回日本癌学会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi