自己生成の硬度グラデーションに沿った集団的硬度学 in vivo
Adam Shellard1, Roberto Mayor2
1Department of Cell and Developmental Biology, University College London, London, UK.
Nature
|December 9, 2021
まとめ
Xenopus laevisの胚細胞は自己生成し,以前は in vivo で証明されていないプロセスであるドロトキシスを介して硬度グラデーションに従います. この機械的な誘導は 効率的な集団的な細胞移動のための 化学信号で機能します
科学分野:
- 発達生物学
- 細胞生物学
- バイオ物理学
背景:
- 集団的な細胞移動は 発達や治癒や病気に不可欠です
- ケモタキシス (化学的梯度に従う) は,細胞移動を指示する確立されたメカニズムである.
- 硬度変形 (硬度グラデーション) は in vitro で観察されたが,その in vivo の関連性は不明であった.
研究 の 目的:
- ドゥロタキシスの存在とメカニズムを in vivo で調査する.
- 胚細胞が基板の硬度グラデーションを生成し,それに反応できるかどうかを判断する.
- 細胞の移動を制御する 機械的・化学的なシグナルを 理解する
主な方法:
- Xenopus laevisの胚を用いて 神経頂部細胞の移動を研究した.
- プレコダ組織におけるニューラル・クライスト細胞による自己生成の硬度グラデーションを調査した.
- 細胞マトリックス粘着,N-カデリン相互作用,および下流信号伝達経路 (Rac活性,アクトミオシン収縮性) を分析した.
主要な成果:
- クセノプスの神経の細胞が隣接する組織にダイナミックな硬度グラデントを生成することを示した.
- ニューラル・クライストの細胞は,この自己生成の硬度グラデーション (ドロタキシー) に従って方向的に移動することを示した.
- 協調されたアクトミオシン活動を通して集団的な細胞移動を強化します.
結論:
- ダイナミック基板の硬度グラデーションに関する最初の in vivo 証拠を提供した.
- N-カデリン相互作用と細胞マトリックス粘着がグラデーション感知と応答を媒介することが確認された.
- 化学的および機械的なシグナルが協力して効率的な方向性集団細胞移動を in vivo で誘導すると結論付けました.
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