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Long term maintenance of pluripotenst stem cells by GAP junction in planarian

Research Project

Project/Area Number 20K06677
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionTsuyama National College of Technology

Principal Investigator

SHIBATA Norito  津山工業高等専門学校, 総合理工学科, 教授 (60402781)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords全能性幹細胞 / MTA / 再生 / プラナリア / ギャップ結合 / 分化全能性幹細胞 / 分化多能性幹細胞
Outline of Research at the Start

プラナリアは体のどの部分で切断されても、すべての断片が再生し固体になる驚異的な再生能力を持つ。この再生能力は新生細胞と呼ばれる分化多能性の幹細胞によって遂行される。本研究ではプラナリアがどのようなメカニズムで成体内で分化多能性の幹細胞を維持し続けているのか、について細胞同士の接着に着目して明らかにすることを目的としている。さらに細胞接着を介して新生細胞を維持する多能性因子の同定も試みる。

Outline of Final Research Achievements

Although planarians maintain pluripotent stem cells named neoblasts widely distributed throughout mesenchymal space, the molecular mechanism for the neoblast maintenance is still unknown. In this study, I aimed to reveal the mechanism for the neoblast maintenance. Dysfunction of planarian MTA homolog genes, MTA-A and MTA-B, by RNAi caused alternation of distribution pattern of neoblasts and regenerative defect simultaneously. This suggest that distribution pattern seemed in MTA knockdown planarians might be involved in maintenance of neoblasts. Double knockdown of MTA-A and a planarian innexin gene, inx-B, that is used in GAP junction could rescue the phenotype observed in MTA-A single knockdown planarians. In contrast to this, simultaneous knockdown of MTA-B and inx-B could not affect phenotype of MTA-B single knockdown planarians, suggesting that there are two mechanisms for neoblast maintenance using different MTA genes in planarians.

Academic Significance and Societal Importance of the Research Achievements

ヒトでは不可能な、生体内で長期にわたって分化全能性幹細胞を維持しているプラナリアから、その機構を学ぶことを本研究の目的とした。その結果、プラナリアはMTA遺伝子の発現を制御することで、幹細胞の接着性を変化させ、その結果、幹細胞の維持を行っている可能性を示唆できた。
in vitroにおいても長期間の維持の困難な全能性幹細胞を、良い状態で維持できる内在的な仕組みの一端を示すことができた本研究は、基礎的な再生研究に対して学術的な意義があり、さらに今後の再生医療の発展に寄与できる社会的意義を持つ。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2022 2020

All Journal Article (3 results) (of which Peer Reviewed: 1 results) Presentation (2 results) Book (1 results)

  • [Journal Article] Loss of plac8 expression rapidly leads pluripotent stem cells to enter active state during planarian regeneration2022

    • Author(s)
      Lee H, Hikasa K, Umesono Y, Hayashi T, Agata K, Shibata N.
    • Journal Title

      Development

      Volume: 149 Issue: 3 Pages: 1-13

    • DOI

      10.1242/dev.199449

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Migratory regulation by <i>MTA</i> homologous genes is essential for the uniform distribution of planarian adult pluripotent stem cells2022

    • Author(s)
      Sato Yuki、Shibata Norito、Hashimoto Chikara、Agata Kiyokazu
    • Journal Title

      Development, Growth &amp; Differentiation

      Volume: 64 Issue: 3 Pages: 150-162

    • DOI

      10.1111/dgd.12773

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Journal Article] What is the role of PIWI family proteins in adult pluripotent stem cells? Insights from asexually reproducing animals, planarians2020

    • Author(s)
      Kashima Makoto、Agata Kiyokazu、Shibata Norito
    • Journal Title

      Development, Growth & Differentiation

      Volume: 62 Issue: 6 Pages: 407-422

    • DOI

      10.1111/dgd.12688

    • Related Report
      2020 Research-status Report
  • [Presentation] プラナリアの繊毛に起因する水流の変化の計測及び解析2022

    • Author(s)
      江見悠多、井原彩智、前澤孝信、柴田典人
    • Organizer
      日本動物学会 第93回大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] プラナリアの繊毛が引き起こす水流の計測法の開発~再生断片を用いて~2022

    • Author(s)
      井原彩智、江見悠多、柴田典人、前澤孝信
    • Organizer
      日本動物学会 第93回大会
    • Related Report
      2022 Annual Research Report
  • [Book] Methods in molecular biology. piRNA. Planarian PIWI-piRNA Interaction Analysis Using Immunoprecipitation and piRNA Sequencing2022

    • Author(s)
      M Kashima, A Miyata, N Shibata
    • Total Pages
      278
    • Publisher
      Clifton, N.J.
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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