哺乳類の胚のサイズと細胞運命を水力的に制御する
Chii Jou Chan1, Maria Costanzo2, Teresa Ruiz-Herrero3
1European Molecular Biology Laboratory, Heidelberg, Germany. cchan@embl.de.
Nature
|June 14, 2019
まとめ
胚の大きさは 内液圧と組織力学によって制御されます 圧力の上昇は成長につながりますが 過剰な圧力は細胞破裂を引き起こし 細胞の運命に影響します
科学分野:
- 発達生物学
- バイオ物理学
- 細胞生物学
背景:
- 組織の発達とホメオスタシスは 精密なサイズ制御に依存しています
- 細胞増殖は研究されているが,胚のサイズ制御と細胞の運命への影響は不明である.
研究 の 目的:
- マウスブラストシストのサイズ制御と細胞運命の仕様における液体で満たされたルメンの役割を調査する.
- 光圧,組織力学,胚の発達を結びつけるメカニズムを理解する.
主な方法:
- マウスブラストシストをモデルシステムとして利用した.
- 生物物理学的,胚学的,薬学的,遺伝的混乱技術を使用した.
- 胚の大きさダイナミクスをモデル化するために,水力的にゲートされた振動の理論を開発した.
主要な成果:
- ブラストキスト発達の間における光圧の2倍増加は,トロフェクトダームの皮質の緊張と組織の硬化と相関する.
- 皮質の緊張が増加すると,ヴィンキュリンのメカニズム感知と緊密な交差点の成熟が促進され,光の成長のためのフィードバックループが形成されます.
- 皮質の緊張の臨界値を超えると, trofhectoderm が破裂し,ブラストシストが崩壊する.
- 狭い結節の障害や 組織の硬さが増加すると 胚のサイズが小さくなる.
- 光圧と大きさは,トロフェクトダームの細胞分裂パターンに影響し,細胞配分と運命に影響します.
結論:
- 光圧と組織力学は,組織スケールでの胚の大きさの重要な調節因子です.
- 細胞の位置と運命を 結びつけています
- この研究は,胚のサイズと細胞の運命を制御する,水力的にゲートされた振動の新しいメカニズムを明らかにしています.
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