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Functional analysis of Ripply3 in the migration of thymus from pharyngeal pouch

Research Project

Project/Area Number 19K07274
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48010:Anatomy-related
Research InstitutionKitasato University

Principal Investigator

Okubo Tadashi  北里大学, 医学部, 准教授 (10450719)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords咽頭弓分節 / 胸腺形成 / 心臓形成 / Ripply3 / 内胚葉 / WRPWモチーフ / 心臓流出路 / 咽頭弓 / 胸腺の移動 / RIpply3 / アミノ酸モチーフ / ゲノム編集 / FPVQモチーフ / 咽頭嚢
Outline of Research at the Start

胎仔期に現れる咽頭弓は心臓や胸腺の形成に重要である。申請者は、咽頭弓で特異的に発現するRipply3の欠損マウスの解析から、Ripply3が咽頭弓や胸腺の形成に必須であり、また培養細胞を用いた解析から、Ripply3はアダプター分子として転写調節だけでなく細胞接着に関わることを見出した。そこで本研究は、Ripply3の進化的に保存されたアミノ酸モチーフに変異を導入したノックインマウスや胚葉特異的Ripply3欠損マウスの解析により、Ripply3が異なるタンパク質との相互作用を介して咽頭弓から胸腺の分離移動をどのように制御しているか解明し、ヒトの先天性心臓免疫疾患の病態解明に貢献する。

Outline of Final Research Achievements

Ripply3 is a gene expressed in the endoderm and ectoderm of the pharyngeal arch during development and is suggested to be involved in pharyngeal arch segmentation and thymus formation. To elucidate the functions of amino acid sequences WRPW and FPVQ, which are evolutionarily conserved in Ripply3, in thymus formation, we analyzed mice with mutations of these sequences. We found that both WRPW and FRVQ mutant mice had dysplastic thymus, but there was a marked difference in the degree of separation and migration of the thymus from pharynx. Furthermore, in the endoderm-specific Ripply3-deficient mice, the frequency of thymus malformation varied greatly depending on the timing of the deletion. These results suggest that the WRPW and FPVQ sequences of Ripply3 are essential for thymus formation and that the timing of Ripply3 expression in the endoderm of the pharyngeal arch is also important for thymus formation.

Academic Significance and Societal Importance of the Research Achievements

胸腺や心臓の形成不全を伴うヒトのDiGeorge症候群は、その欠失領域に存在するTbx1が主な原因だが、Ripply3はTbx1に対する転写抑制因子で、その転写抑制活性はRipply3がもつアミノ酸配列FPVQとWRPWに依存することが培養細胞を用いた解析により示唆されていた。本研究では、これらの配列に変異を導入したマウスを解析し、両配列の胸腺形成における重要性が個体レベルで証明された。また咽頭弓内胚葉と外胚葉に発現するRipply3のうち、内胚葉のRipply3は胸腺の咽頭からの分離・移動に必須なことを示した。これらはヒト先天性疾患の病態解明に大きく貢献すると期待される。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (3 results)

  • [Journal Article] Effect of retinoic acid signaling on Ripply3 expression and pharyngeal arch morphogenesis in mouse embryos2021

    • Author(s)
      Tadashi Okubo, Keiko Hara, Sadahiro Azuma, Shinji Takada
    • Journal Title

      Developmental Dynamics

      Volume: 250 Issue: 7 Pages: 1036-1050

    • DOI

      10.1002/dvdy.301

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] TGF-β regulates nerve growth factor expression in a mouse intervertebral disc injury model2021

    • Author(s)
      Yokozeki Y, Uchida K, Kawakubo A, Nakawaki M, Okubo T, Miaygi M, Inoue G, Itakura M, Sekiguchi H, Takaso M
    • Journal Title

      BMC Musculoskelet Disord

      Volume: 22 Issue: 1 Pages: 634-634

    • DOI

      10.1186/s12891-021-04509-w

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Regulation of tumor necrosis factor-alpha by peptide Lv in bone marrow macrophage and synovium2021

    • Author(s)
      3.Mukai M, Uchida K. Okubo T, Takano S, Matsumoto T, Satoh M, Inoue G, Takaso M
    • Journal Title

      Frontiers in Medicine Rheumatology

      Volume: 8 Pages: 701216-701216

    • DOI

      10.3389/fmed.2021.702126

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Phenotypic analysis of mouse embryos with mutations in two evolutionarily conserved amino acid motifs in Ripply32023

    • Author(s)
      Daisuke Narita, Ryusuke Ishizuka, Yosuke Kajiyama, Yudai Yabe, Shinji Takada, Tadashi Okubo
    • Organizer
      The 56th Annual Meeting of the Japanese Society of Developmental Biologists. Sendai, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] Phenotypic analysis of mouse embryos with mutations in two evolutionarily conserved amino acid motifs in Ripply32022

    • Author(s)
      Ryusuke Ishizuka, Yosuke Kajiyama, Yudai Yabe, Daisuke Narita, Shinji Takada, Tadashi Okubo
    • Organizer
      第45回 日本分子生物学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] The effect of retinoic acid signaling on the expression of Ripply3 gene in pharyngeal arch development2019

    • Author(s)
      Tadashi Okubo, Keiko Hara, Sadahiro Azuma, Shinji Takada
    • Organizer
      第52回 日本発生生物学会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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