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Study of DNA damage and repair mechanism in porcine embryos obtained from vitrified oocytes and zygotes, and its relevance to genome editing

Research Project

Project/Area Number 21K05912
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 42010:Animal production science-related
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

Somfai Tamas  国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, 上級研究員 (90547720)

Co-Investigator(Kenkyū-buntansha) 原口 清輝  国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, 上級研究員 (10324576)
菊地 和弘  国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, グループ長補佐 (20360456)
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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsブタ卵子 / ブタ接合体 / ガラス化保存 / DNA二本鎖切断 / ゲノム編集 / OCT4 / CD46 / 胚盤胞発生 / DNA修復機能 / ブタ / 卵子 / DNA修復
Outline of Research at the Start

ブタ卵子や受精卵の超低温ガラス化保存技術は、改良増殖や遺伝子資源の保存の面から非
常に重要である。しかし、ブタ卵子をガラス化保存した場合の、発生能の低下やその原因については不明な点が多く残されており、医学研究において急速に重要性が高まっているゲノム編集技術の材料の提供手段として利用されるには至っていない。本研究では、ゲノム編集技術にも関連が深いDNA損傷修復機能に注目し、ガラス化保存がブタ卵子・受精卵にもたらすDNA 損傷とDNA修復機能が卵子のステージにどのように依存しているのかを明らかにし、ガラス化保存後のブタ卵子・受精卵を利用したゲノム編集胚を作出する。

Outline of Final Research Achievements

The purpose of this study was to correlate the degree of DNA damage and repair in vitrified porcine oocytes and fertilized eggs (zygotes) with embryonic developmental outcomes and, as feedback to the findings, to establish the technology to produce genome edited embryos from vitrified oocytes or zygotes for the first time. Vitrification significantly increased the level of DNA double-strand breaks in immature oocytes, but not in zygotes. This was highlighted with reduced embryo development in vitrified immature oocytes whereas the developmental competence of vitrified zygotes was not affected. Therefore, for the next experiments we used vitrified zygotes for the production of genome-edited porcine embryos. Genome editing was applied by knocking out the OCT4 or CD46 genes or both using CRISPRcas9 via electroporation. Over 20% of vitrified zygotes could develop to blastocyst after genome editing and the efficacy of genome editing was over 90% in all groups.

Academic Significance and Societal Importance of the Research Achievements

本研究は、卵子の超低温保存がその後の胚発生に及ぼすDNA損傷と修復のレベルに関する新たな知見を提供し、今後の家畜やヒトにおける遺伝子バンク技術の向上に貢献するものである。さらに、このプロジェクトで確立されたガラス化技術とゲノム編集技術は、ヒトの生物医学研究に使用されるゲノム編集モデルブタの生産を強化する事が可能となる。

Report

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

    (8 results)

All 2024 2023 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Vitrification of immature oocytes in pigs2024

    • Author(s)
      Somfai Tam?s
    • Journal Title

      Animal Science Journal

      Volume: 95 Issue: 1

    • DOI

      10.1111/asj.13943

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electroporation‐mediated genome editing in vitrified/warmed porcine zygotes obtained in vitro2023

    • Author(s)
      Haraguchi Seiki、Dang‐Nguyen Thanh Q.、Kikuchi Kazuhiro、Somfai Tam?s
    • Journal Title

      Molecular Reproduction and Development

      Volume: 91 Issue: 1

    • DOI

      10.1002/mrd.23712

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Vitrification of porcine immature oocytes and zygotes results in different levels of DNA damage which reflects developmental competence to the blastocyst stage2023

    • Author(s)
      Somfai Tam?s、Haraguchi Seiki、Dang-Nguyen Thanh Quang、Kaneko Hiroyuki、Kikuchi Kazuhiro
    • Journal Title

      PLOS ONE

      Volume: 18 Issue: 3 Pages: e0282959-e0282959

    • DOI

      10.1371/journal.pone.0282959

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dibutyryl‐cAMP and roscovitine differently affect premature meiotic resumption and embryo development of vitrified immature porcine oocytes2022

    • Author(s)
      Nguyen Hiep Thi、Somfai Tam?s、Hirao Yuji、Dang‐Nguyen Thanh Quang、Linh Nguyen Viet、Nguyen Bui Xuan、Nguyen Nhung Thi、Nguyen Hong Thi、Nguyen Van Hanh、Kaneko Hiroyuki、Takagi Mitsuhiro、Kikuchi Kazuhiro
    • Journal Title

      Animal Science Journal

      Volume: 93 Issue: 1

    • DOI

      10.1111/asj.13795

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Altered microfilament dynamics contribute to the formation of diploid metaphase spindles in porcine oocytes which fail to reach the metaphase-II stage during in vitro maturation.2022

    • Author(s)
      Somfai T, Dang-Nguyen TQ , Kikuchi K.
    • Journal Title

      Animal Science Journal

      Volume: 93 Issue: 1

    • DOI

      10.1111/asj.13690

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Vitrification of porcine immature oocytes and zygotes results in different levels of DNA damage in subsequently developing embryos.2022

    • Author(s)
      Somfai T, Haraguchi S, Dang-Nguyen T.Q., Kikuchi K.
    • Organizer
      International Congress on Animal Reproduction
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Application of Assisted Reproductive Techniques for the Preservation of Indigenous Pigs.2022

    • Author(s)
      Somfai T, Haraguchi H, Dang-Nguyen T, Kikuchi K.
    • Organizer
      The 6th Fatty Pig International Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Vitrification of porcine immature oocytes causes DNA double-strand breaks in subsequently developing embryos2021

    • Author(s)
      ソムファイ タマス, 原口 清輝, Dang-Nguyen TQ, 金子 浩之, 菊地 和弘
    • Organizer
      Cryopreservation Conference 2021 (Online)
    • Related Report
      2021 Research-status Report

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

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