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English title

Research Project

Project/Area Number 17K00548
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Risk sciences of radiation and chemicals
Research InstitutionKyoto University

Principal Investigator

Motegi Akira  京都大学, 医学研究科, 助教 (80452332)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsDNA損傷トレランス / 複製後修復 / 相同組換え / ユビキチン
Outline of Final Research Achievements

In this study, I have addressed to the possible functional relationships between the replication fork reversal (RFR) pathway and the homology-dependent repair (HDR) pathway in vertebrate cells by generating and analyzing DT40 cell lines doubly deficient in one of the RFR genes 1)SHPRH, 2) RAD18, or 3)ZRANB3 along with the HDR gene BRCA1. I observed the enhanced sensitivity towards the PARP inhibitor Olaparib, defects in the gene targeting efficiencies, and reduced rates of the recombination in the substrate assay in double knock-out (KO) cells than BRCA1 single KO cells. All of those results suggests that RFR may have competitive roles with HDR in promoting the restoration of stalled replication forks.

Academic Significance and Societal Importance of the Research Achievements

複製ブロックの解除は生命にとって根源的な課題である遺伝情報の複製・維持において必須の仕組みである。本研究の対象であるRFR経路は、複製ブロックの解除において従来からよく知られている相同組換えと論理的に競合しうるが、それを逆遺伝的手法によって検証、実証した点に学術的意義がある。また、新しいタイプの抗がん剤として注目されているPARP阻害剤はBRCA1の機能を欠損したがんでより致死作用が強いが、その作用機序として複製再開の仕組みとの関連が考えられる。本研究の結果はPARP阻害剤をはじめとした新しいがん治療薬の作用機序についての基礎的知見を提供する点に社会的意義がある。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 2017

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (3 results) (of which Invited: 1 results)

  • [Journal Article] HDAC3 is required for XPC recruitment and nucleotide excision repair of DNA damage induced by UV irradiation2020

    • Author(s)
      1.Koji Nishimoto, Hiroyuki Niida, Chiharu Uchida, Tatsuya Ohhata, Kyoko Kitagawa, Akira Motegi, Takafumi Suda, and Masatoshi Kitagawa
    • Journal Title

      Mol. Cancer Res.

      Volume: 18 Issue: 9 Pages: 1367-1378

    • DOI

      10.1158/1541-7786.mcr-20-0214

    • NAID

      120007165672

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Aberrations in DNA repair pathways in cancer and therapeutic significances2019

    • Author(s)
      Akira Motegi, Mitsuko Masutani, Ken-ichi Yoshioka, and Tadashi Bessho
    • Journal Title

      Seminars in Cancer Biology

      Volume: 58 Pages: 29-46

    • DOI

      10.1016/j.semcancer.2019.02.005

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] PARI regulates stalled replication fork proessing to maintain genome stability upon replication stress in mice2017

    • Author(s)
      Ayako L. Mochizuki, Ami Katanaya, Eri Hayashi, Mihoko Hosokawa, Emiko Moribe, Akira Motegi, Masamichi Ishiai,Minoru Takata, Gen Kondoh, Hitomi Watanabe, Norio Nakatsuji, and Shinichiro Chuma
    • Journal Title

      Mol. Cell. Biol

      Volume: 37 (23) Issue: 23

    • DOI

      10.1128/mcb.00117-17

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phosphorylated HBO1 at UV irradiated sites is essential for nucleotide excision repair2017

    • Author(s)
      Niida, H., Matsunuma, R., Horiguchi, R., Uchida, C., Nakazawa, Y., Motegi, A., Nishimoto, K., Sakai, S., Ohhata, T., Kitagawa, K., Moriwaki, S., Nishitani, H., Ui, A., Ogi, T. and Kitagawa, M.
    • Journal Title

      Nature Communications

      Volume: 8 Issue: 1 Pages: 16102-16102

    • DOI

      10.1038/ncomms16102

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] HDAC3 induces translocation of XPC from active gene promoters to DNA lesions alter UV irradiation to promote nucleotide excision repair2019

    • Author(s)
      Hiroyuki Niida, Koji Nishimoto, Akira Motegi, Masatochi Kitagawa
    • Organizer
      第62回日本影響学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] ユビキチンリガーゼによるDNA損傷トレランスの制御機構2019

    • Author(s)
      Akira Motegi
    • Organizer
      日本核酸医薬学会 生物セッション第4回サテライトシンポジウム2019
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] PARI regulates stalled replication fork proessing to maintain genome stability upon replication stress in mice2017

    • Author(s)
      Ayako L. Mochizuki, Ami Katanaya, Eri Hayashi, Mihoko Hosokawa, Emiko Moribe, Akira Motegi, Masamichi Ishiai,Minoru Takata, Gen Kondoh, Hitomi Watanabe, Norio Nakatsuji, and Shinichiro Chuma
    • Organizer
      第89回日本遺伝学会大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2023-01-30  

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