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Identification of genomic elements that promote hormone-responsive transient expression of oncogenes

Research Project

Project/Area Number 21K07148
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionKyoto University

Principal Investigator

Shintaro Yamada  京都大学, 生命科学研究科, 特任講師 (20837869)

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: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords性ホルモン / DNAトポイソメラーゼ / DNA二重鎖切断 / DNA修復 / 乳癌
Outline of Research at the Start

性ホルモン受容体は、ホルモンに結合すると転写因子として様々な遺伝子の転写を制御する。性ホルモン刺激後の早期転写応答時に、標的遺伝子の転写制御配列で、ゲノム切断がしばしば発生する(既知)。応募者らは非相同末端結合がこの切断を再結合することを過去に見つけた。細胞が効率よく再結合できないと、性ホルモン刺激後の転写応答が大きく変わる(予備実験結果)。研究目的は3つである:(i) 非相同末端結合の前段階に関与する酵素の解明、(ii) この酵素が欠損した時の、転写応答の変化の解明、(iii) ゲノム切断部位をゲノム全体で決定。本研究は、ゲノム切断の修復と早期転写応答とのクロストークという新領域を開拓する。

Outline of Final Research Achievements

Receptors for sex hormones regulate transcription of various genes as transcription factors. During the transcriptional response after sex hormone stimulation, genomic breaks often occur at transcriptional regulatory sequences (promoters and enhancers) of target genes in a DNA topoisomerase II-dependent manner. If cells are unable to efficiently recombine these genomic breaks, the transcriptional response after sex hormone stimulation is greatly altered. In this study, we analyzed the early transcriptional response of prostate cancer cells exposed to the male hormone androgen. We found that mutants that accumulate refractory genomic truncations (TDP2) have enhanced early transcriptional responses, such as the c-MYC oncogene. Moreover, we identified enhancers whose activities correlate with those early transcriptional responses.

Academic Significance and Societal Importance of the Research Achievements

本研究では、ゲノム切断修復酵素が欠損した時の、外的刺激への転写応答変化を全ゲノムで解析した。その結果、TDP2と同様にゲノム切断の修復が異常になるATMやBRCA1、BRCA2の変異の保因者が前立腺癌を起こしやすい原因の一つが、アンドロゲン暴露時のエンハンサーの異常による発癌遺伝子の異常な転写応答である可能性が推察された。得られた成果は、ATM、BRCA1、BRCA2などのDNA損傷修復遺伝子の変異の保因者が、乳癌や卵巣癌、前立腺癌を発症しやすいか、その問いに答える分子メカニズムを解明するための基盤になる。

Report

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

    (14 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 7 results,  Invited: 3 results)

  • [Int'l Joint Research] Cedars-Sinai Medical Center(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] TDP2 is a regulator of estrogen-responsive oncogene expression2024

    • Author(s)
      Nicholas Manguso, Minhyung Kim, Neeraj Joshi, Rasel Al Mahmud, Juan Aldaco, Ryusuke Suzuki, Felipe Cortes-Ledesma, Xiaojiang Cui, Shintaro Yamada, Shunichi Takeda, Armando Giuliano, Sungyong You and Hisashi Tanaka
    • Journal Title

      NAR Cancer

      Volume: in press

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ATM suppresses c-Myc overexpression in the mammary epithelium in response to estrogen2023

    • Author(s)
      Najnin Rifat Ara、Al Mahmud Md Rasel、Rahman Md Maminur、Takeda Shunichi、Sasanuma Hiroyuki、Tanaka Hisashi、Murakawa Yasuhiro、Shimizu Naoto、Akter Salma、Takagi Masatoshi、Sunada Takuro、Akamatsu Shusuke、He Gang、Itou Junji、Toi Masakazu、Miyaji Mary、Tsutsui Kimiko M.、Keeney Scott、Yamada Shintaro
    • Journal Title

      Cell Reports

      Volume: 42 Issue: 1 Pages: 111909-111909

    • DOI

      10.1016/j.celrep.2022.111909

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Physiological concentrations of glucocorticoids induce pathological DNA double-strand breaks2022

    • Author(s)
      Akter Salma、Shimba Akihiro、Ikuta Koichi、Mahmud Md. Rasel Al、Yamada Shintaro、Sasanuma Hiroyuki、Tsuda Masataka、Sone Masakatsu、Ago Yukio、Murai Kenichi、Tanaka Hisashi、Takeda Shunichi
    • Journal Title

      Genes to Cells

      Volume: 28 Issue: 1 Pages: 53-67

    • DOI

      10.1111/gtc.12993

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ゲノム損傷修復の破綻による臓器特異的発癌機構2024

    • Author(s)
      山田真太郎
    • Organizer
      JSPS サンフランシスコ日本人研究者交流会
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A functional link between DNA double-strand break repair and the early transcriptional response to the sex hormone2023

    • Author(s)
      山田真太郎
    • Organizer
      Social DNAing
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ATM suppresses c-Myc overexpression in the mammary epithelium in response to estrogen2023

    • Author(s)
      Rifat Ara Najnin, Md Rasel Al Mahmud, Md Maminur Rahman, Shunichi Takeda, Hiroyuki Sasanuma, Hisashi Tanaka, Yasuhiro Murakawa, Naoto Shimizu, Salma Akter, Masatoshi Takagi, Takuro Sunada, Shusuke Akamatsu, Gang He, Junji Itou, Masakazu Toi, Mary Miyaji, Kimiko M. Tsutsui, Scott Keeney, and Shintaro Yamada
    • Organizer
      The 19th Ataxia-Telangiectasia workshop
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] ATM suppresses c-Myc overexpression in mammary epithelium in response to estrogens2022

    • Author(s)
      Rifat Najnin, Md Rasel Al Mahmud, Md Maminur Rahman, Hiroyuki Sasanuma, Naoto Shimizu, Salma Akter, Yasuhiro Murakawa, Scott Keeney, Shunichi Takeda, and Shintaro Yamada
    • Organizer
      86th Symposium: Genome Stability & Integrity
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] ATM Suppresses c-Myc Overexpression in the Mammary Epithelium in Response to Estrogens2022

    • Author(s)
      Rifat Najnin, Md Rasel Al Mahmud, Md Maminur Rahman, Shunichi Takeda, Hiroyuki Sasanuma, Naoto Shimizu, Salma Akter, Scott Keeney, and Shintaro Yamada
    • Organizer
      Genome Integrity Discussion Group
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] DNA損傷修復応答の破綻による臓器特異的発がん機構2022

    • Author(s)
      山田真太郎
    • Organizer
      第45回日本分子生物学会年会 日本生物物理学会 共催
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] ATM suppresses c-Myc overexpression in the mammary epithelium in response to estrogen2022

    • Author(s)
      Rifat Ara Najnin, Md Rasel Al Mahmud, Md Maminur Rahman, Shunichi Takeda, Hiroyuki Sasanuma, Hisashi Tanaka, Yasuhiro Murakawa, Naoto Shimizu, Salma Akter, Masatoshi Takagi, Takuro Sunada, Shusuke Akamatsu, Gang He, Junji Itou, Masakazu Toi, Mary Miyaji, Kimiko M. Tsutsui, Scott Keeney, Shintaro Yamada
    • Organizer
      第 40 回染色体ワークショップ 第 21 回核ダイナミクス研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] Genome-wide identification of androgyne-responsive enhancers and analysis of TOP2 function in enhancers2021

    • Author(s)
      山田真太郎
    • Organizer
      TOPO 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] TOP2-dependent DSBs at extracellular signal-specific enhancers and their effects on signal-induced transcription2021

    • Author(s)
      山田真太郎、Md Rasel Al Mahmud、村川泰裕、武田俊一
    • Organizer
      EMBO Workshop DNA Topology in genomic transactions
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 細胞外シグナル特異的エンハンサーにおける TOP2 依存的ゲノム切断と転写への影響2021

    • Author(s)
      山田真太郎、Md Rasel Al Mahmud、村川泰裕、武田俊一
    • Organizer
      第39回 染色体ワークショップ・ 第19回 核ダイナミクス研究会
    • Related Report
      2021 Research-status Report

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

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