ロング・ノンコーディング・RNA MIAT 進行性動脈硬化損傷形成とプラークの不安定化を制御する
Francesca Fasolo1,2, Hong Jin3,4, Greg Winski3
1Department for Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technical University Munich, Germany (F.F., J. Pauli, H.W., N.G., S.B., S.M., Z.W., W.K., H.-H.E., V.P., L. Maegdefessel).
Circulation
|October 14, 2021
まとめ
心筋梗塞関連トランスクリプト (MIAT) のロング・ノンコーディングRNAは,動脈硬化で上位調節される. MIATは滑らかな筋肉細胞の機能とマクロファージの性質を調節し,進んだ動脈硬化病変の形成に寄与する.
科学分野:
- 血管生物学
- 分子生物学
- 遺伝学
背景:
- 長い非コーディングRNA (lncRNAs) は血管の恒常性および疾患において重要な役割を果たします.
- 心筋梗塞関連トランスクリプト (MIAT) は,生物学的プロセスに関与するlncRNAである.
研究 の 目的:
- 動脈硬化と動脈疾患における lncRNA MIAT の機能的役割を調査する.
- 血管の滑らかな筋肉細胞とマクロファージにおけるMIATの調節メカニズムを特定する.
主な方法:
- 人間の動脈のプラークと制御動脈のRNAトランスクリプトプロファイリング.
- 定量的なリアルタイムPCRとMIATの検証のためのin situハイブリッド化.
- マウスとミニブタモデルを用いたMIATの実験的なノックダウン in vitroおよびin vivo研究.
主要な成果:
- MIATは,対照群と比較して,動脈硬化性頸動脈プラークで有意に上昇した.
- 滑らかな筋肉細胞の増殖と移動を減らし,同時にアポトーシスを増加させた.
- MIATはEGR1- ELK1- ERKとKLF4経路を通じて,滑らかな筋肉細胞の分化とマクロファージのような移行を調節する.
結論:
- lncRNA MIATは 進行性動脈硬化症における新しい調節剤です
- MIATは,滑らかな筋肉細胞の増殖,アポトーシス,そしてフェノタイプの移行を含む重要な細胞プロセスを制御します.
- MIATはマクロファージの炎症性特性を影響し,動脈硬化病変の発生に寄与する.
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