動く細胞における形状決定のメカニズム

Kinneret Keren¹, Zachary Pincus, Greg M Allen

¹Department of Biochemistry, Technion- Israel Institute of Technology, Haifa 32000, Israel.

Nature

|May 24, 2008

まとめ

細胞の形状は複雑ですが,魚のケラトサイトの多様性はシンプルなモデルを示しています. 膜袋の中のアクチンネットワークのトレッドミリングは,細胞形態学と速度を説明します.

科学分野:

細胞生物学細胞生物学
バイオフィジックス生物物理学
バイオケミストリーバイオケミストリー

背景:

細胞の形状は運動性にとって極めて重要ですが,複雑な相互作用のために理解することは困難です.
多くのダイナミックなプロセスは,様々な空間的,時間的なスケールで細胞形態学に影響を与えます.

研究の目的:

移動性細胞における細胞形状決定のメカニズムを調査する.
魚のケラトサイトにおける自然な現象的変異性を活かして,その基礎となる原理を明らかにする.

主な方法:

魚 (Hypsophrys nicaraguensis) の運動性表皮性ケラトサイトの大群を利用した.
細胞集団内の自然現象的変動性を分析した.
拡張不可能な膜内のアクチンネットワークのトレッドミリングの生体物理モデルを開発し,適用しました.

主要な成果:

ケラトサイトにおける機能的状態の低次元,高度に相関するスペクトルを特定した.
アクチンネットワークのトレッドミリングモデルが,観察されたスペクトルを定量的に再現することを実証しました.
細胞の形状と速度の両方を予測するモデルの能力を示しました.

結論:

伸縮不可能な膜袋のアクチンネットワークのトレッドミリングの単純なモデルは,機動細胞の形態学と行動の生化学的および生体物理的基礎を提供します.
自然現象的多様性は,複雑な生物システムを解剖するための強力なツールです.
この発見は,細胞の形状決定を理解するための簡素化された枠組みを提供する.

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