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

Analyses of the mechanisms for DNA G-quadruplex resolution as a molecular basis of the treatment of breast and ovarian cancer.

Research Project

Project/Area Number 17H03585
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Tumor biology
Research InstitutionSt. Marianna University School of Medicine

Principal Investigator

Ohta Tomohiko  聖マリアンナ医科大学, 医学研究科, 教授 (60233136)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2017: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords乳癌 / 卵巣癌 / 相同組換修復 / グアニン4重鎖 / G4安定化剤
Outline of Final Research Achievements

We investigated mechanisms regulating a secondary DNA structure G-quadruplex (G4) to clarify the significance of G4 stabilizer in cancer treatments. We discovered an essential role of HERC2 in G4 resolution by mediating interaction between single-strand DNA binding protein RPA and DNA helicases BLM and WRN. HERC2 was also required for phosphorylation and ubiquitination of RPA2. This mechanism is critical because G4 accumulation as a result of HERC2 deficiency may provide a therapeutic target for G4 stabilizers.

Academic Significance and Societal Importance of the Research Achievements

乳がんや卵巣がんの中で特に予後の悪いがんの一部は、DNAの修復機能に異常があることがわかっており、これを標的とした治療が有効である。しかし、この治療法における耐性の獲得が問題となっている。本研究により、そのようながんの弱点としてDNAの二次構造であるグアニン四重鎖(G4)が蓄積するメカニズムの1つが解明された。

Report

(4 results)
  • 2020 Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (22 results)

All 2019 2018 2017 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 3 results) Book (8 results) Remarks (1 results)

  • [Journal Article] HERC2 regulates RPA2 by mediating ATR-induced Ser33 phosphorylation and ubiquitin-dependent degradation.2019

    • Author(s)
      Lai Y, Zhu M, Wu W, Rokutanda N, Togashi Y, Liang W, Ohta T.
    • Journal Title

      Sci Rep.

      Volume: 9 Issue: 1 Pages: 14257-14257

    • DOI

      10.1038/s41598-019-50812-x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] HERC2 facilitates BLM and WRN helicase complex interaction with RPA to suppress G-quadruplex DNA.2018

    • Author(s)
      Wu W, Rokutanda N, Takeuchi J, Lai Y, Maruyama R, Togashi Y, Nishikawa H, Arai N, Miyoshi Y,Suzuki N, Saeki Y, Tanaka K, Ohta T.
    • Journal Title

      Cancer Res.

      Volume: 78 Issue: 22 Pages: 6371-6385

    • DOI

      10.1158/0008-5472.can-18-1877

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Chromatin Regulation by HP1γ Contributes to Survival of 5-Azacytidine-Resistant Cells.2018

    • Author(s)
      Imanishi S, Umezu T, Kobayashi C, Ohta T, Ohyashiki K, Ohyashiki JH.
    • Journal Title

      Front Pharmacol.

      Volume: 9 Pages: 1166-1166

    • DOI

      10.3389/fphar.2018.01166

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fbxo22-mediated KDM4B degradation determines selective estrogen receptor modulator activity in breast cancer.2018

    • Author(s)
      Johmura Y, Maeda I, Suzuki N, Wu W, Goda A,Morita M, Yamaguchi K, Yamamoto M, Nagasawa S, Kojima Y, Tsugawa K, Inoue N, Miyoshi Y, Osako T Akiyama F, Maruyama R, Inoue JI, Fukukawa Y, Ohta T, Nkanishi M.
    • Journal Title

      J Clin Invest.

      Volume: 128 Issue: 12 Pages: 5603-5619

    • DOI

      10.1172/jci121679

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] SERM感受性決定因子Fbxo22によるLuminal乳がん高リスク群の同定2019

    • Author(s)
      太田智彦
    • Organizer
      第27回日本乳癌学会学術総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] PARP 阻害剤耐性とその克服戦略2019

    • Author(s)
      太田智彦
    • Organizer
      第17回日本臨床腫瘍学会学術集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] PARP阻害剤耐性獲得に対する治療戦略2019

    • Author(s)
      太田智彦, 朱明章, 呉文文
    • Organizer
      第78回日本癌学会学術総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] HERC2 ubiquitinates RPA2 in ATR dependent manner and promotes RPA to suppress G-quadruplex DNA.2019

    • Author(s)
      Yongqiang Lai, Mingzhang Zhu, Wenwen Wu, Yukiko Togashi, Tomohiko Ohta.
    • Organizer
      11th AACR-JCA Joint Conference on Breakthroughs in Cancer Research
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] HERC2はグアニン四重鎖(G4)の主要な制御因子としてG4安定化剤の感受性を左右する.2018

    • Author(s)
      呉文文, 竹内淳, 頼勇強, 三好康雄, 鈴木直, 佐伯泰, 田中啓二, 朱明章, 太田智彦.
    • Organizer
      第77回日本癌学会学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] HERC2 promotes BLM and WRN functions to suppress G-quadruplex DNA.2018

    • Author(s)
      Tomohiko Ohta.
    • Organizer
      EMBO Meeting Cellular signalling and cancer therapy 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A novel role of HERC2 in maintaining chromosomal stability.2017

    • Author(s)
      Tomohiko Ohta
    • Organizer
      6th US-Japan DNA Repair Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 乳癌におけるDNA損傷修復不全とPARP阻害剤感受性2017

    • Author(s)
      太田智彦
    • Organizer
      第25回日本乳癌学会学術総会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Resistance of Fbxo22 knockout cancer cells to poly(ADP-ribose)polymerase(PARP)inhibitor.2017

    • Author(s)
      頼勇強, 呉文文, 梁偉新, 太田智彦
    • Organizer
      第76回日本癌学会学術総会
    • Related Report
      2017 Annual Research Report
  • [Book] メディカル・サイエンス・ダイジェスト「DNA相同組換え修復とユビキチン」2019

    • Author(s)
      朱明章, 太田智彦
    • Total Pages
      4
    • Publisher
      ニュー・サイエンス社
    • Related Report
      2019 Annual Research Report
  • [Book] がん分子標的治療「がん治療分子標的としてのDNA相同組み換え修復異常」2019

    • Author(s)
      朱明章, 呉文文, 太田智彦
    • Total Pages
      8
    • Publisher
      メディカルレビュー社
    • Related Report
      2019 Annual Research Report
  • [Book] 臨床医のための乳腺基礎医学「乳癌におけるDNA損傷と修復不全」2018

    • Author(s)
      頼勇強, 太田智彦.
    • Total Pages
      5
    • Publisher
      メディカルレビュー社
    • Related Report
      2018 Annual Research Report
  • [Book] BRCA1/2の基礎とPARP阻害剤2018

    • Author(s)
      太田智彦.
    • Total Pages
      9
    • Publisher
      乳癌の臨床
    • Related Report
      2018 Annual Research Report
  • [Book] 臨床医のための乳腺基礎医学「乳癌におけるDNA損傷と修復不全」2018

    • Author(s)
      頼勇強, 太田智彦
    • Total Pages
      5
    • Publisher
      メディカルレビュー社
    • Related Report
      2017 Annual Research Report
  • [Book] BRCA1/2の基礎とPARP阻害剤2018

    • Author(s)
      太田智彦
    • Total Pages
      9
    • Publisher
      乳癌の臨床
    • Related Report
      2017 Annual Research Report
  • [Book] 乳癌学-最新の診断と治療- Ⅲ.乳癌の分子生物学と発症機序「DNA修復不全と乳癌2017

    • Author(s)
      太田智彦
    • Total Pages
      6
    • Publisher
      日本臨床
    • Related Report
      2017 Annual Research Report
  • [Book] 遺伝子診断・遺伝カウンセリング. 遺伝性乳癌卵巣癌症候群(HBOC)診療の手引き 2017年版2017

    • Author(s)
      櫻井晃洋, 赤木究, 和泉美希子, 太田智彦, 三木義男
    • Total Pages
      44
    • Publisher
      金原出版
    • Related Report
      2017 Annual Research Report
  • [Remarks] 聖マリアンナ医科大学大学院 医学研究科 応用分子腫瘍学

    • URL

      http://www.marianna-u.ac.jp/t-oncology/index.html

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report 2017 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi