シリアは,左-右非対称性を指示するカルシウム媒介メカニカセンサとして機能する
Lydia Djenoune1, Mohammed Mahamdeh1, Thai V Truong2
1Cardiovascular Research Center, Cardiology Division, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02129, USA.
まとめ
左右のオーガナイザー (LRO) の不動性シリアは 機械的な力を感知し 細胞のレバーとして作用します この機械感覚は生体力学的な力をカルシウム信号に変換し,脊椎動物における左-右非対称性を確立するのに不可欠です.
科学分野:
- 発達生物学
- 細胞生物学
- バイオ物理学
背景:
- 脊椎動物の双面的対称性破裂は,左右のオーガナイザー (LRO) の運動性シリアに依存する.
- LROシリアが生成する液体の流れを感知するメカニズムは,ほとんど不明である.
- 毛皮のメカニカル感覚を理解することは 発達過程の解読に不可欠です
研究 の 目的:
- 胚の左右組織 (LRO) の不動性シリアの機械感覚的役割を調査する.
- 機械的な力が細胞内信号に変換される 分子機構を解明する.
- LROシリアの機械的な操作が,左-右非対称性の欠陥を救済できるかどうかを判断する.
主な方法:
- 光学ピンチ,光シート顕微鏡,およびゼブラフィッシュの深層学習を組み合わせた in vivo 分析パイプラインの開発.
- 光学ピンチを使用して,不動のLROシリアの機械的刺激.
- イントラシリアカルシウムトランジエントの分析と特定のイオンチャネルへの依存性
主要な成果:
- 運動不可能なLROシリアは 機械センサーとして機能し 切断力を検知します
- ポリシスティン2に依存する内視カルシウムトランジエントを誘発した不動性シリアの機械的操作
- LROのシリアに機械的な力を加えたことで,シリアが動かないゼブラフィッシュの心臓部欠陥を回復させました.
結論:
- 胚のLROシリアはメカニカルに敏感な細胞レバーです
- このシリアは生物力学的な力を カルシウム信号に変換して 左-右非対称性を導きます
- この研究は 脊椎動物の発達中の 機械的なシグナルを感知するための 新しいメカニズムを明らかにしています
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