Cdc42,MRCK,ミオシン,アクチン流によって調節される核の動きは,移動する細胞でMTOCの偏分を確立します
Edgar R Gomes1, Shantanu Jani, Gregg G Gundersen
1Department of Anatomy and Cell Biology, Columbia University, New York, NY 10032, USA.
Cell
|May 11, 2005
まとめ
細胞移動には,微小管組織センター (MTOC) の方向転換が伴う. この研究は,核が細胞の縁から離れ,MTOCの位置を変え,細胞の移動を誘導することを明らかにしています.
科学分野:
- 細胞生物学 細胞生物学
- 細胞骨格のダイナミクス
- 細胞移動 細胞移動
背景:
- マイクロチューブル組織センター (MTOC) の方向転換は,方向性細胞移動に不可欠です.
- 以前のモデルでは,方向転換時にMTOCの動きを提案していました.
研究 の 目的:
- 移動する線維芽細胞におけるMTOC再方向化のメカニズムを調査する.
- MTOCの再定位における核定位と細胞骨格の構成要素の役割を決定する.
主な方法:
- 傷の縁の線維芽細胞の生細胞からの直接イメージング.
- 溶性因子を用いてMTOCの方向転換を刺激する.
- 特定の分子経路の乱れ (Cdc42,ミオシン,アクチン,ダイネイン,Par6,PKCzeta).
主要な成果:
- 核は先端から離れるが,MTOCは方向転換中に静止している.
- 後方核の動きは,アクチン逆行流と関連しており,Cdc42,MRCK,ミオシン,アクチンによって調節されます.
- ダイネイン,Par6,PKCzetaは核の移動には必要ではなく,細胞の中心部にMTOCの位置を維持するために不可欠です.
結論:
- 核の位置変更は,移動する細胞におけるMTOCの方向転換を先行し,促進する.
- 核とMTOCの位置付けは,異なる分子経路によって調節されます.
- この研究は,移動中の細胞の偏極化の初期イベントを再定義します.
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