AblとCanoe/Afadinは三細胞結合におけるメカニカル伝達を媒介する
Huapeng H Yu1, Jennifer A Zallen2
1Howard Hughes Medical Institute and Developmental Biology Program, Sloan Kettering Institute, New York, NY, USA.
まとめ
科学者は,Ablチロシンキナーゼとカヌー/アファディンがフルーツフライの胚の緊張下での細胞結合を安定させる新しい経路を発見し,細胞が組織発達の過程で機械的な力にどのように反応するかを明らかにしました.
科学分野:
- 細胞生物学
- 発達生物学
- バイオ物理学
背景:
- 表面組織は機械的な力に反応して 細胞を動的に再構成します
- 細胞間の力の伝達には 重要な役割を果たします
- 細胞の力感知と反応のインビボメカニズムは,まだ完全に理解されていません.
研究 の 目的:
- 細胞が三細胞結合で機械的緊張を感知し,それに反応する分子機構を特定する.
- 甲状腺メカニカル伝達におけるAblチロシンキナーゼとCanoe/Afadinの役割を解明する.
主な方法:
- ドロソフィラ胚におけるメカニカル伝達が研究された.
- Ablキナーゼとカヌー/アファディンの役割を研究するために遺伝子操作を使用した.
- 三細胞結合におけるタンパク質の局所化とリン酸化のダイナミクスを調べた.
- 変化したカヌー機能の細胞結合と上皮再構成への影響を評価した.
主要な成果:
- Ablチロシンキナーゼとカヌー/アファディンが関与する経路を特定し,三細胞結合の緊張下での細胞結合を安定させる.
- 三細胞結合へのカヌー誘導は アクトミオシンの収縮性によって引き起こされる
- カヌー の Abl 依存性 リン酸化 が その 機械 感受性 に 決定 的 な もの で ある こと を 示し た.
- カヌーリン酸化は 三細胞結合を不安定にし 強制的な局所化は 細胞の再編成を阻害する
結論:
- エピテリアの改造中に三細胞結合の安定性を調節する新しい力反応機構を発見した.
- カヌーのアビ依存性リン酸化は,機械的緊張の鍵となるセンサーとトランスデューサとして機能する.
- この経路は,上皮の完全性を維持し,動的細胞の再編成を可能にするために不可欠です.
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