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環境トポグラフィを用いた細胞移動
Anne Reversat1,2, Florian Gaertner3, Jack Merrin3
1Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria. anne.reversat@gmail.com.
Nature
|June 26, 2020
まとめ
白血球は,自己推進のために基板のトポグラフィを使用することで,細胞粘着なしに移動することができます. この粘着に依存しない細胞移動メカニズムは,アクチン細胞骨格の流れを環境の質感と結びつけます.
科学分野:
- 細胞生物学
- バイオ物理学
- 機械生物学
背景:
- ユカリオット細胞の移動は通常,インテグリンのようなトランスメブラン粘着受容体に依存し,細胞内の力を環境と結合させる.
- 白血球などのアミーボイド細胞は,粘着性が低いにもかかわらず,急速な移動を示し,代替メカニズムを示唆しています.
- 細胞の移動を理解することは,様々な生理学的および病理学的プロセスにとって極めて重要です.
研究 の 目的:
- 膜外力結合がない場合の白血球移動の仕組みを調査する.
- 白血球が粘着せずに移動できるかどうかを環境のシグナルを利用して判断する.
- 粘着依存と粘着依存の間の関係を探求する.
主な方法:
- 定義された地形的な特徴を持つ3次元環境の中に白血球を閉じ込めます.
- アクチン細胞骨格の逆流を基質の質感に関連して観察し,分析する.
- トランスメブランの力結合が全くない状態での力伝達を調査する.
主要な成果:
- 白血球は,外膜の力結合なしに力を伝達し,移動することができる.
- 細胞は,制限されたときに推進のために基板の地形特性を利用します.
- 逆行性のアクチン流は 基板の質感に従って 細胞の動きを駆動する 切断力を生み出します
- 粘着依存と粘着独立の移動は同じ原理の変形である.
結論:
- 白血球の移動は,逆行性アクチン流と基板のトポグラフィーを結合することによって,粘着とは独立して起こる.
- この粘着性のない移動メカニズムは 細胞の運動の自律性を可能にします
- この発見は,さまざまな環境で適用可能な多用途の細胞移動戦略を明らかにしています.
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