• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

形態的分節と上皮化誘導

Research Project

Project/Area Number 12145101
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionThe Institute of Physical and Chemical Research (2002-2004)
Nara Institute of Science and Technology (2000-2001)

Principal Investigator

高橋 淑子  独立行政法人理化学研究所, パターン形成研究チーム, チームリーダー (10183857)

Co-Investigator(Kenkyū-buntansha) 安田 國雄  国立大学法人奈良先端科学技術大学院大学, バイオサイエンス研究科, 副学長 (30025473)
赤坂 甲治  国立大学法人東京大学, 大学院・理学系研究科, 教授 (60150968)
丹羽 仁史  理化学研究所, 多能性幹細胞研究チーム, チームリーダー (80253730)
荻野 肇  奈良先端科学技術大学院大学, バイオサイエンス研究科, 助手 (10273856)
Project Period (FY) 2000 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥78,500,000 (Direct Cost: ¥78,500,000)
Fiscal Year 2004: ¥15,500,000 (Direct Cost: ¥15,500,000)
Fiscal Year 2003: ¥15,400,000 (Direct Cost: ¥15,400,000)
Fiscal Year 2002: ¥23,800,000 (Direct Cost: ¥23,800,000)
Fiscal Year 2001: ¥23,800,000 (Direct Cost: ¥23,800,000)
Keywords分節 / 体節 / Eph / ephrin / ニワトリ胚 / cMeso1 / 境界 / 誘導 / エレクトロポレーション法 / Rhoファミリー / Rac1 / Cdc42 / 細胞極性 / 細胞 / セグメンター / エレクトロポーション法 / 上皮細胞 / 間充織細胞 / Lunatic Fringe / Notch / 境界形成 / シグナル分子 / L-Fringe / 発生 / シグナルシークエンストラップ / 形態形成
Research Abstract

我々は一貫して、脊椎動物をもっとも特徴づける体の分節が生まれるしくみについて研究を行っている。これまでに独自の解析法を用いて、分節境界を誘導する活性を見出している(この活性はセグメンターと名付けられた)(Sato et al.,Development,2002)。今年度は、セグメンターの分子メカニズムについて解析した。まず、次分節部位に早くから発現を始めるcMeso1に注目し、セグメンターアッセイを行った。その結果、cMeso1は高い効率で分節境界の形成を誘導した。そこで、cMeso1の下流遺伝子を探索した。転写因子であるPax2,Sox9、接着分子PAPC、細胞間反発分子EphA4などが、cMeso1と同じ領域に発現し、かつcMeso1の強制発現により発現が上昇したことから、これらはcMeso1の下流分子だと思われた。それぞれの分子についてセグメンターアッセイを行った結果、EphA4が境界誘導活性を示した。また、cMeso1の下流でNotchシグナルが活性化され、このNotch活性によってEphA4が発現されることも確認した。興味深いのは、EphA4が作用すると思われる隣接細胞内で、ephrinからのReverse signalが入るだけで境界形成が起こることである。このことはEphA4のドミナントネガティブ型をエレクトロポレーションすることで見出された。これらの研究から、セグメンターの分子実体はephrinの活性化であることがほぼ明らかになった。分節境界を引き起こす分子メカニズムの全貌が見え始めてきた。

Report

(5 results)
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (18 results)

All 2005 2004 Other

All Journal Article (4 results) Publications (14 results)

  • [Journal Article] Shaping up of the chic chick : boundary formation shared between somitogenesis and brain development.2005

    • Author(s)
      Takahashi Y.
    • Journal Title

      International Journal of Developmental Biology (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Mesenchymal-to-epithelial transition during somitic segmentation : a novel approach to study the roles of Rho family GTPases in morphogenesis.2005

    • Author(s)
      Takahashi.Y., Sato, Y., Suetsugu, R., Nakaya Y.
    • Journal Title

      Cells Tissues Organs (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Somitogenesis in vertebrate development2004

    • Author(s)
      Takahashi Y.
    • Journal Title

      Encyclopedia of Life Sciences(Nature Publishing Group) (Web Publishing)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Mesenchymal-epithelial transition during somitic segmentation is regulated by differential roles of Cdc42 and Rac1.2004

    • Author(s)
      Nakaya, Y., Kuroda, S., Katagiri, Y., Kaibuchi, K., Takahashi, Y.
    • Journal Title

      Developmental Cell 7

      Pages: 425-438

    • Related Report
      2004 Annual Research Report
  • [Publications] Suetsugu, R., Sato, Y., Takahashi, Y.: "Pax 2 expression in mesodermal segmentation and its relationship with EphA4 and Lunatic fringe during chicken somitogenesis."Mechanisms of Development. 199S. 155-159 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Tonegawa, A., Kasai, T., Takahashi, Y.: "Systematic screening for signaling molecules expressed during somitogenesis by the signal sequence trap method."Developmental Biology. 262. 32-50 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Takahashi, Y.: "Somitogenesis in vertebrate development."Encyclopedia of Life Sciences(Nature Publishing Group). (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Takahashi, Y: "Shaping up of the chic chick : boundary formation shared between somitogenesis and brain development."International Journal of Developmental Biology. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Shiroi, A., Yoshikawa, M., Yokota, H., Fukui, H., Ishizaka, S., Tatsumi.K., Takahashi, Y.: "Identification of insulin producing cells derived from embryonic stem cells by zinc-chelating dithizone"STEM CELLS. 20. 284-292 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sato, Y., Yasuda, K., Takahashi, Y.: "Morphological boundary forms by a novel inductive event mediated by Lunatic-Fringe and Notch during somitic segmentation"Development. 129. 3633-3644 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Suetsugu, R., Sato, Y., Takahashi, Y.: "Pax 2 expression in mesodermal segmentation and its relationship with EphA4 and Lunatic fringe during chicken somitogenesis"Mechanisms of Development. 2. 157-161 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sudo H., Takahashi Y., Tonegawa A., Arase Y., Aoyama H., Mizutani-Koseki Y., Moriya H., Wilting J., Christ B., Koseki H.: "Inductive signals from the somatopleure mediated by bone morphogenetic proteins are essential for the formation of the stemal component of avian ribs"Dev. Biol.. 232. 284-300 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Takahashi Y., Osumi N., Patel N.: "Body Patterning"Proc. Natl. Acad. Sci. USA. 98. 12338-12339 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Takahashi,Y.,Kuro-o,M.and Ishikawa,F.: "Aging Mechanisms"Proc.Natl.Acad.Sci.USA. 97. 12407-12408 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yasuda,K.,Momose,T.and Takahashi,Y: "Applications of microelectroporation for studies of chick embryogenesis."Develp.Growth Differ.. 42. 203-206 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 利根川あかね,高橋淑子: "背腹軸に沿った中胚葉の部域化のしくみ"実験医学. 18. 1211-1217 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 磯崎行雄,高橋淑子: "日米若手科学者のドリームチーム対決"科学(岩波書店). 71. 191-196 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Sudo H.,Takahashi Y., et al.: "Inductive signals from the somatopleure mediated by bone morphogenetic proteins are essential for the formation of the sternal component of avian ribs."Dev.Biol.. (in press).

    • Related Report
      2000 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2018-03-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi