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Induction of Adhesion-dependent Signals Using Low-intensity Ultrasound
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信号伝達,転写,粘着の間のリンクは,上皮の芽の発達における
Colin Jamora1, Ramanuj DasGupta, Pawel Kocieniewski
1Howard Hughes Medical Institute, Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, New York 10021, USA.
Nature
|March 21, 2003
まとめ
2つの外部信号,WntとBMP阻害剤は,β-カテニンを安定させ,Lef1.1を生成することによって,毛皮の形成を誘発します. この複合体はE-カデリンをダウンレギュレーションし,幹細胞の形態変異と毛皮の発達を可能にします.
科学分野:
- 発達生物学 発達生物学について
- 幹細胞生物学 幹細胞生物学
- 分子生物学は分子生物学である.
背景:
- 毛囊の発達を含むオルガノゲネシスは,上皮の幹細胞の成長低下から始まります.
- 葉片形態変異は,幹細胞が極性を変化させ,細胞と細胞の接触により芽構造を形成することを含む.
研究 の 目的:
- 葉っぱの形態変異の基礎となる分子機構を解明する.
- 毛小胞の発達に関与するシグナル伝達経路と転写因子を特定する.
主な方法:
- Wntシグナル伝達と骨形態遺伝タンパク質 (BMP) の阻害が卵泡形態変異における役割を調査した.
- ヘアフォリクル形成中のβ-カタニン,Lef1,E-カデリンの相互作用を分析した.
- 細胞分裂と細胞骨格動態におけるE-カデリンの機能を研究するために,ドロソフィラモデルを使用した.
主要な成果:
- 同時に発生するWntシグナル伝達とBMP阻害は,β-カタニンを安定させ,Lef1.1を生成する.
- 活性化されたLef1複合体は,細胞の極性および粘着の重要な要因であるE-カデリンを低調化する.
- 信号伝達の障害やE-カデリン濃度の上昇は,卵泡の形態発生と陰化を妨げます.
結論:
- 分子プログラムは,WntとBMPのシグナル伝達経路を Lef1転写因子形成にリンクします.
- Lef1は,E-カデリンのダウンレギュレーションによって細胞の結節を再構成し,卵泡の形成を促進します.
- 細胞分裂と粘着におけるE-カデリンの役割は,毛皮の発達に不可欠です.
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