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Functional analysis of the cell initiating gastrulation process.

Research Project

Project/Area Number 21K19270
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 InstitutionThe University of Tokushima

Principal Investigator

TAKEMOTO Tatsuya  徳島大学, 先端酵素学研究所, 教授 (30443899)

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: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords原腸陥入
Outline of Research at the Start

本研究では、原腸陥入を開始させる細胞と、それに続く細胞集団がどのように異なるのか?を明らかにする。原腸陥入開始時に基底膜に穴をあけ、あるいは基底膜の間隙を広げて、胚の内側に潜り込む最初の細胞(1~数細胞)を同定するとともに、他の予定中・内胚葉の集団(多数の細胞集団)との違いを明らかにする。さらに、リーダー細胞を特徴付ける遺伝子の機能に介入することで、どういった仕組みで原腸陥入が開始されるのかを明らかにする。

Outline of Final Research Achievements

In this study, I tried to identify a cell that initiates gastrulation. I visualized cells in the epiblast of day 6 embryos at the onset of gastrulation and observed their behavior using live imaging. I succeeded in distinguishing and tracking the behavior of individual cells. This approach allowed us to identify the first cells migrating from the epiblast layer to the mesendoderm layer at the time of gastrulation. Furthermore, we succeeded in labeling the cells with PA-mCherry, which expresses fluorescence upon light stimulation. The labeled cells (assumed to be the leader cells) are now being isolated and analyzed for gene expression that differs from other cells.

Academic Significance and Societal Importance of the Research Achievements

初期胚発生には、体軸(前後軸・左右軸など)の決定や原腸陥入など「対称性の破れ」となる局面が多く存在する。いずれもが「わずかな数細胞の変化」が「大多数の細胞の変化」を引き起こす現象である。原腸陥入に関するこれまでの研究の多くは、後者の大多数の細胞の変化(移動)についてであり、その結果、原腸陥入する細胞に共通した仕組みが明らかになりつつある。一方で、それらを引き起こす最初の細胞に注目した例はほとんどない。
そこで本研究では、原腸陥入する最初の細胞を研究対象として、それに続く細胞との違いを明らかにする。本研究は、「わずかな数細胞」によって主導される生命現象を理解するための研究モデルとなる。

Report

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

    (5 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results)

  • [Journal Article] Intercellular exchange of Wnt ligands reduces cell population heterogeneity during embryogenesis2023

    • Author(s)
      Yudai Hatakeyama, Nen Saito, Yusuke Mii, Ritsuko Takada, Takuma Shinozuka, Tatsuya Takemoto, Honda Naoki, Shinji Takada
    • Journal Title

      Nature Communications

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Binding of LAG-3 to stable peptide-MHC class II limits T?cell function and suppresses autoimmunity and anti-cancer immunity2022

    • Author(s)
      Maruhashi Takumi、Sugiura Daisuke、Okazaki Il-mi、Shimizu Kenji、Maeda Takeo K.、Ikubo Jun、Yoshikawa Harunori、Maenaka Katsumi、Ishimaru Naozumi、Kosako Hidetaka、Takemoto Tatsuya、Okazaki Taku
    • Journal Title

      Immunity

      Volume: - Issue: 5 Pages: 912-924

    • DOI

      10.1016/j.immuni.2022.03.013

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] PD-1 agonism by anti-CD80 inhibits T cell activation and alleviates autoimmunity2022

    • Author(s)
      Sugiura Daisuke、Okazaki Il-mi、Maeda Takeo K.、Maruhashi Takumi、Shimizu Kenji、Arakaki Rieko、Takemoto Tatsuya、Ishimaru Naozumi、Okazaki Taku
    • Journal Title

      Nature Immunology

      Volume: 23 Issue: 3 Pages: 399-410

    • DOI

      10.1038/s41590-021-01125-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] PD-1 preferentially inhibits the activation of low-affinity T cells2021

    • Author(s)
      Shimizu Kenji、Sugiura Daisuke、Okazaki Il-mi、Maruhashi Takumi、Takemoto Tatsuya、Okazaki Taku
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 35

    • DOI

      10.1073/pnas.2107141118

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The nephric mesenchyme lineage of intermediate mesoderm is derived from Tbx6-expressing derivatives of neuro-mesodermal progenitors via BMP-dependent Osr1 function2021

    • Author(s)
      Hayashi Shinichi、Suzuki Hitomi、Takemoto Tatsuya
    • Journal Title

      Developmental Biology

      Volume: 478 Pages: 155-162

    • DOI

      10.1016/j.ydbio.2021.07.006

    • Related Report
      2021 Research-status Report
    • Peer Reviewed

URL: 

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

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