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Establishment of stable somatic haploid cells through engineering of centrosome duplication "checkpoint"

Research Project

Project/Area Number 21K19244
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionHokkaido University

Principal Investigator

Uehara Ryota  北海道大学, 先端生命科学研究院, 准教授 (20580020)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords倍数性 / 中心体 / 一倍体 / ゲノム不安定性 / 細胞分裂 / 人工遺伝子回路 / 合成生物学
Outline of Research at the Start

動物の一倍体細胞は次世代型生命工学の発展の鍵となる技術であるが、その著しいゲノム不安定性が汎用性の妨げとなる。申請者は最近、一倍体特異的に起こる慢性的な中心体複製遅延が、ゲノム不安定性の原因であることを突き止めた。本研究では、中心体複製の遅延を検知するセンサと、複製遅延が修正されるまで細胞周期進行を一時停止させるアクチュエータを組み込んだ人工遺伝子回路を創出することで、天然に存在しない「中心体複製チェックポイント機構」を構築する。これにより、慢性的な中心体複製不全を自己修正してゲノム安定性を保持する一倍体細胞の樹立を目指す。

Outline of Final Research Achievements

In this study, we attempted to resolve the genomic instability of animal haploid cells caused by chronic centrosome loss using two approaches: i) designing a new molecular circuit to resolve centrosome replication defects and ii) establishing a genetic background that allows stable mitotic control in the absence of a centrosome. Regarding i), we examined and optimized the structure of the artificial circuit component genes and produced synthetic genes that minimize interference with the endogenous centrosome regulatory system. We will evaluate their functions in the future. For ii), we found haploidy-linked insufficiency in gene products for acentrosomal mitotic control. By the replenishment of these factors, we succeeded in establishing a stable haploid cell line that could maintain their haploid state for more than one month in continuous culture.

Academic Significance and Societal Importance of the Research Achievements

全遺伝子を1コピー保有する一倍体細胞は、遺伝子機能改変が容易で、遺伝学や細胞工学ツールとして高い利便性をもつ。しかし、動物一倍体は著しいゲノム不安定性で短期間に二倍体化することが汎用性の妨げている。本研究では、二つの独立したアプローチのうちの1つにより高い安定性をもつ一倍体ヒト細胞の樹立に成功した。この過程で、一倍体不安定性の原因となる具体的な遺伝子群を特定した点に高い学術的意義がある。また、本研究で確立した一倍体安定化法は、多くの動物種の一倍体制御に適用可能と考えられ、安定一倍体技術の発達を通して、生命工学および農水産資源開発の分野に波及性が期待できる点に社会的意義がある。

Report

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

    (8 results)

All 2023 2022 2021 Other

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

  • [Int'l Joint Research] Semmelwies University(ハンガリー)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Tata Institute of Fundamental Research(インド)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Tetraploidy-linked sensitization to CENP-E inhibition in human cells.2023

    • Author(s)
      Yoshizawa Koya、Matsura Akira、Shimada Masaya、Ishida‐Ishihara Sumire、Sato Fuyu、Yamamoto Takahiro、Yaguchi Kan、Kawamoto Eiji、Kuroda Taruho、Matsuo Kazuya、Tamaoki Nobuyuki、Sakai Ryuichi、Shimada Yasuhito、Mishra Mithilesh、Uehara Ryota
    • Journal Title

      Molecular Oncology

      Volume: 10 Issue: 6 Pages: 13379-13379

    • DOI

      10.1002/1878-0261.13379

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Centrosome Loss And Cell Proliferation Defects Underlie Developmental Failure In Haploid Zebrafish Larvae2022

    • Author(s)
      Yaguchi Kan、Saito Daiki、Menon Triveni、Matsura Akira、Mizutani Takeomi、Kotani Tomoya、Nair Sreelaja、Uehara Ryota
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2022.05.12.491746

    • Related Report
      2022 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Ultrastructural Characteristics of Finger-Like Membrane Protrusions in Cell Competition2022

    • Author(s)
      Kamasaki Tomoko、Uehara Ryota、Fujita Yasuyuki
    • Journal Title

      Microscopy

      Volume: in press Issue: 4 Pages: 195-205

    • DOI

      10.1093/jmicro/dfac017

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 染色体倍加に伴う中心体の量的変化の作用2022

    • Author(s)
      上原亮太
    • Organizer
      第45回 日本分子生物学会年会ワークショップ
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 染色体倍加に伴う中心体活性亢進の原理と意義2022

    • Author(s)
      上原亮太
    • Organizer
      第95回 日本生化学会大会 シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 動物生活環を特徴づける“倍数性・中心体リンク”2021

    • Author(s)
      上原亮太
    • Organizer
      第94回日本生化学会大会  シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2021-07-13   Modified: 2024-01-30  

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