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Novel roles for the transcription factor OTX2 in the epiblast that regulate head development

Research Project

Project/Area Number 21K06204
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 InstitutionJT Biohistory Research Hall

Principal Investigator

Kondoh Hisato  株式会社生命誌研究館, その他部局等, 顧問 (70127083)

Project Period (FY) 2021-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsOtx2 / 脳形成 / エピブラスト / ニワトリ胚培養 / Electroporation / Live imaging / トランスクリプトーム / 神経系ー中胚葉共通前駆体 / NMP / 脊髄形成 / 体節形成 / ニワトリ胚 / エレクトロポレーション / OTX2 / Wntシグナル / 神経系原基 / N2エンハンサー / 脳 / 脊髄 / 単一細胞トランスクリプトーム / エピブラスト幹細胞 / 中枢神経系 / 神経幹細胞 / 細胞移動 / Wnt シグナル / 胚 / 頭部形成
Outline of Research at the Start

OTX2は、頭部形成に必須の転写因子である。本研究では、エピブラストの前半の領域が頭部組織に発生する過程での、OTX2の新しい制御機能を解明する。私たちの予備研究によって、OTX2は、エピブラスト細胞の尾側への移動を制御し、エピブラスト内で頭部前駆体と体幹部前駆体のバランスをとる機能を持つ可能性が示された。本研究では、(1) OTX2がエピブラストの頭部領域から体幹部領域への移動を制御することを検証し、(2) その制御に関与するOTX2の下流遺伝子を同定し、(3) エピブラストの尾側領域でのOtx2遺伝子の発現抑制にWntシグナルが関与する可能性を検討する。

Outline of Final Research Achievements

Otx2 is a transcription factor essential for the development of embryonic head tissues, including the brain. However, Otx2 expressed in the neuroepithelium is not involved in the regional specification of the early-stage central nervous system (CNS). We addressed the possible roles of Otx2 in other aspects of CNS development. We focused on tissue regions where Otx2 expression is low, namely, the posterior epiblast and tissue belts along the bending of the neural plate. Filling these expression gaps via exogenous Otx2 expression resulted in pleiotropic developmental abnormalities. Analysis of these effects of pan-epiblast Otx2 expression via embryo live imaging and transcriptome analysis identified two essential activities of Otx2 during gastrulation: (1) Promotion of neuroepithelium development, which overrides the bipotential nature of NMPs. (2) The development of bending-refractory neural plate. Owing to these activities of Otx2, the brain develops quickly with a large tissue mass.

Academic Significance and Societal Importance of the Research Achievements

転写因子Otx2は、中枢神経系の初期発生過程で、神経系の領域化(前脳・中脳、非脊髄)に関わると考えられてきたが、本研究によって、それらの領域化には直接には関与しないことが示された。Otx2にはエピブラストから神経系への発生を強力に促進する活性があること、屈曲に抗する強靭な神経上皮を形成する活性があることが示された。これらのOtx2の活性によって、大きな神経組織としての脳が発生する。発生生物学の基礎として、また、多能性幹細胞を用いたオルガノイド研究の基盤情報として、重要な研究成果である。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (13 results)
  • Research Data

    (1 results)

All 2025 2024 2023 2022 Other

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (5 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results) Remarks (1 results)

  • [Journal Article] The potent neuroepithelium-promoting activity of Otx2 during gastrulation, as demonstrated by its exogenous epiblast-wide expression in chicken embryos2025

    • Author(s)
      Takami N, Kato K, Yoshihi K, Kawamura A, Iida H, Kondoh H.
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: Accepted

    • DOI

      10.3389/fcell.2025.1599287

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chicken embryo cultures in the dorsal-upward orientation for the manipulation of epiblasts.2024

    • Author(s)
      Konya K, Watanabe Y, Kawamura A, Nakamura K, Iida H, Yoshihi K, Kondoh H.
    • Journal Title

      Dev Growth Differ.

      Volume: 66 Issue: 8 Pages: 426-434

    • DOI

      10.1111/dgd.12943

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Wnt signal-dependent antero-posterior specification of early-stage CNS primordia modeled in EpiSC-derived neural stem cells2024

    • Author(s)
      Nakamura Kae、Watanabe Yusaku、Boitet Claire、Satake Sayaka、Iida Hideaki、Yoshihi Koya、Ishii Yasuo、Kato Kagayaki、Kondoh Hisato
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 11 Pages: 1260528-1260528

    • DOI

      10.3389/fcell.2023.1260528

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Origin and Regulation of Neuromesodermal Progenitors (NMPs) in Embryos2024

    • Author(s)
      Kondoh Hisato、Takemoto Tatsuya
    • Journal Title

      Cells

      Volume: 13 Issue: 6 Pages: 549-549

    • DOI

      10.3390/cells13060549

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Epiblast cells gather onto the anterior mesendoderm and initiate brain development without the direct involvement of the node in avian embryos: Insights from broad-field live imaging2022

    • Author(s)
      Yoshihi Koya、Iida Hideaki、Teramoto Machiko、Ishii Yasuo、Kato Kagayaki、Kondoh Hisato
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 10 Pages: 1019845-1019845

    • DOI

      10.3389/fcell.2022.1019845

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Live imaging of avian epiblast and anterior mesendoderm grafting reveals the complexity of cell dynamics during early brain development2022

    • Author(s)
      Yoshihi Koya、Kato Kagayaki、Iida Hideaki、Teramoto Machiko、Kawamura Akihito、Watanabe Yusaku、Nunome Mitsuo、Nakano Mikiharu、Matsuda Yoichi、Sato Yuki、Mizuno Hidenobu、Iwasato Takuji、Ishii Yasuo、Kondoh Hisato
    • Journal Title

      Development

      Volume: 149 Issue: 6

    • DOI

      10.1242/dev.199999

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The transition of the embryonic cell origin from neural-specific progenitors to neuromesodermal progenitors2024

    • Author(s)
      Hisato KOndoh
    • Organizer
      57th Annual meeting of JSDB
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The anteroposterior regionality of the CNS is determined by the Wnt signal input levels when neural stem cells develop from the epiblast2023

    • Author(s)
      Yusaku Watanabe, Kae Nakamura, Hisato Kondoh
    • Organizer
      56th Annual meeting of JSDB
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sox2 enhancers N2 and N1 pave the way to the understanding of embryonic neural development2023

    • Author(s)
      Hisato Kondoh
    • Organizer
      6th International Workshop on SOX transcription factors
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 脳発生の最初の大まかな領域特性は、Wntシグナル強度の緩やかな違いで与えられる2023

    • Author(s)
      近藤寿人
    • Organizer
      日本発生生物学会:Wnt研究会2023
    • Related Report
      2023 Research-status Report
  • [Presentation] Live imaging of avian epiblast and anterior mesendoderm grafting reveals the complexity of cell dynamics during early brain development2022

    • Author(s)
      Koya Yoshihi, Kagayaki Kato, Hideaki Iida, Machiko Teramoto, Yasuo Ishii, Hisato Kondoh
    • Organizer
      55th Annual Meeting of the Japanese Society of Developmental Biologists
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Book] Molecular Basis of Developmental and Stem Cell Regulation2024

    • Author(s)
      Hisato Kondoh
    • Total Pages
      252
    • Publisher
      Springer
    • ISBN
      9783031390265
    • Related Report
      2023 Research-status Report
  • [Remarks] 発生生物学の静かな革命 VOL. 1 実験発生学とオーガナイザー

    • URL

      https://www.brh.co.jp/research/hisato_kondo/

    • Related Report
      2021 Research-status Report

All 2026

  • Otx2強制発現ニワトリ胚のRNA-seqデータ2026

    • Funder
      • Funder Name
        Japan Society For The Promotion Of Science
      • e-Rad_funder
        1025
      • Identifier of Crossref Funder Registry

        https://doi.org/10.13039/501100001691

      • Japan Grant Number
        JP21K06204
      • Project Name
        頭部形成を制御する転写因子OTX2の、エピブラストでの新しい機能の解明
    • Title
      Otx2強制発現ニワトリ胚のRNA-seqデータ
    • Issued Date
      2026-04-06
    • Abstract
      胚組織ごとのOtx2の強制発現の効果を比較するためのRNA-seqデータ
    • Research Field
      ライフサイエンス
    • Data Type
      genomic data
    • Data Utilization and Provision Policy
      無償、但しクレジットを表記することを条件。
    • Access Rights Type
      open access
    • Repository Information
      NCBI Gene Expression Omnibus
    • URI

      https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE292068

    • Contributor
      • Contributor Type
        Data Manager
      • Contributor Name
        The GEO team
      • Contributor Type
        Hosting Institution
      • Contributor Name
        National Center for Biotechnology and Information (NCBI)
      • Contributor Type
        Contact Of Data Manager
      • Contributor Name
        geo*ncbi.mim.nih.gov (メールアドレスは「@」を「*」に置換しています。)
    • Data No.

      JP21K06204-2024-0001

    • Related Report
      2024 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2026-04-14  

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