マウスの肺幹細胞の微分化は,BMP4-NFATc1-thrombospondin-1軸を通じた内皮細胞によって導かれます
Joo-Hyeon Lee1, Dong Ha Bhang2, Alexander Beede1
1Stem Cell Program, Boston Children's Hospital, Boston, MA 02115, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
Cell
|February 4, 2014
まとめ
肺幹細胞は,特定の肺細胞タイプに分離する. 内皮細胞における新たに発見されたBMP4-NFATc1-TSP1シグナル伝達経路は,肺の修復と再生に不可欠なこのプロセスを指示します.
科学分野:
- 細胞生物学 細胞生物学
- 発達生物学 発達生物学について
- 再生医学は,再生医療である.
背景:
- 肺幹細胞の微分化は,マイクロ環境のシグナルによって制御されます.
- ブロンキオアルベオラ幹細胞 (BASC) は,多効力差異化可能性を備えています.
- 特定の指示メカニズムは,ほとんど不明のままです.
研究 の 目的:
- 肺幹細胞の微分化を制御する指導的メカニズムを調査する.
- BASC系統のコミットメントに関与するシグナル伝達経路を特定する.
- 肺幹細胞の運命を指揮する内皮細胞の役割を理解する.
主な方法:
- 内皮細胞と遠肺幹細胞 (BASCs) のクローン3D共同培養.
- 信号伝達経路を研究するための機能の獲得と喪失の実験.
- 遺伝子発現と細胞の微分化の分析 in vitro.
- 肺損傷の修復を評価するためにTsp1ゼロマウスを用いたin vivo研究.
主要な成果:
- 単一のBASCは,共同培養において,支支支管管と管管の両方の微分化の可能性を示した.
- BMP4-Bmpr1aは,内皮細胞のシグナル伝達にカルシヌーリンの活性化/NFATc1.
- この活性化により,トランボスポンディン-1 (Tsp1) の発現が起こり,アルベオラBASCの分化を引き起こした.
- Tsp1ゼロマウスは,胞損傷修復の障害を示し,この経路のインビヴォの重要性を強調した.
結論:
- BMP4-NFATc1-TSP1軸は,肺上皮質の分化と再生を調節する重要な経路です.
- この経路は,肺幹細胞のアルベオラ系特異的分化を指示する.
- この軸を理解することで,肺疾患の潜在的な治療目標と,呼吸器疾患の研究のツールが提供されます.
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