内皮のフォークヘッドボックスの転写因子P1は,成長因子-β1-内皮リン-1信号経路を変換することによって,病理的な心臓の改造を調節する
Jie Liu1, Tao Zhuang1, Jingjiang Pi2
1Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine (J.L., T.Z., X.C., Z.Y., L.Z., Z.L., Y.Z.), Tongji University School of Medicine, China.
Circulation
|June 11, 2019
まとめ
内皮細胞 (ECs) のフォークヘッドボックス転写因子P1 (Foxp1) は,病的な心臓の改造を防止する上で重要な役割を果たします. EC-Foxp1-TGF-β1-endothelin-1経路を標的とした治療は,心不全の新たな治療法となる可能性があります.
科学分野:
- 心血管生物学
- 分子心臓科
- 心臓 疾患 の 細胞 機構
背景:
- 病理性心筋線維症と高縮は 左心室改造の重要な特徴で,しばしば心不全につながる.
- 内皮細胞 (ECs) のフォークヘッドボックス転写因子P1 (Foxp1) は心臓の発達に不可欠ですが,病理的な再構成におけるその役割は不明です.
研究 の 目的:
- EC-Foxp1の病理的な心改造における役割を明らかにする.
- 心臓におけるEC-Foxp1の機能の分子メカニズムを調査する.
主な方法:
- EC特有のFoxp1機能喪失と機能獲得のマウスモデルを生成した.
- 心臓の改造を誘導するためにアニオテンシンII注入と横軸大動脈収縮モデルを使用した.
- 変換成長因子β1 (TGF-β1) が,ChIPとルシフェラーゼアッセイでFoxp1標的遺伝子として確認された.
- 薬理学的抑制と,TGF-β1- siRNAのECへの標的型納米粒子の配送を用いたTGF-β1阻害効果を調査した.
主要な成果:
- EC- Foxp1の消去は心臓の改造,線維症,高縮を悪化させ,心臓の機能不全を悪化させた.
- EC-Foxp1の機能増強は病理的な再構築から保護され,心臓の機能が改善されました.
- Foxp1はTGF-β1を直接標的にし,その消去はTGF-β1のシグナル伝達をアップレギュレーションし,エンドセリン-1経由で線維症と高縮を促進する.
- TGF-β1のシグナル伝達を阻害することで,EC-Foxp1の消去の有害な効果が正常化しました.
結論:
- EC-Foxp1はTGF-β1-エンドセリン-1経路を調節し,心臓線維症と高縮を制御する.
- この経路の調節不良は 心臓機能障害と心不全に繋がります
- EC-Foxp1-TGF-β1-endothelin-1経路を標的にすることは,心不全に対する有望な治療戦略です.
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