メセンキマ・エンドセリアの移行は,心臓の新血管化に寄与する
Eric Ubil1, Jinzhu Duan2, Indulekha C L Pillai2
1Department of Cell Biology &Physiology, School of Medicine, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
Nature
|October 16, 2014
まとめ
心臓の線維芽細胞は,心臓損傷後に内皮細胞に変容し,修復を助けることができます. p53タンパク質は,このプロセスに不可欠であり,心臓病の潜在的治療標的を提供します.
科学分野:
- 心血管生物学 心血管生物学
- 細胞生物学 細胞生物学
- 再生医学は,再生医療である.
背景:
- 内皮細胞は血管形成に不可欠です.
- 心臓の線維芽細胞は,内皮細胞 (内皮細胞からメゼンキマ細胞への移行) に分化することが知られている.
- 心筋線維芽細胞が内皮の運命を採用し,心筋損傷後の新血管化に寄与する可能性は未知のままです.
研究 の 目的:
- 心臓線維芽細胞が心臓損傷後に内皮細胞に移行できるかどうかを調査する.
- この過程における転写因子p53の役割を決定する.
- 心臓の修復のためのこの移行を調節する治療の可能性を評価する.
主な方法:
- 心臓損傷モデルで遺伝的運命マッピング技術を活用した.
- 繊維芽細胞由来内皮細胞の表型および機能的特性を分析した.
- 細胞の運命,血管化,心臓機能に対するp53調節 (損失と刺激) の影響を調査した.
主要な成果:
- 心臓線維芽細胞は,心筋梗塞性心損傷後の内皮細胞のようなフェノタイプを急速に採用することが観察されました.
- 線維芽細胞に由来する内皮細胞は,ネイティブの内皮細胞の特徴を示した.
- 線維芽細胞におけるp53の喪失は,内皮細胞の形成を阻害し,血管の密度を低下させ,心臓の機能を悪化させた.
- p53経路の刺激により,メゼンキマからエンドセリアへの移行が強化され,血管性が改善され,心臓機能が改善されました.
結論:
- 心臓の線維芽細胞によるメゼンキマから内皮細胞への移行は,損傷した心臓における新血管化に大きく貢献します.
- 転写因子p53は,この細胞の再プログラムにおいて重要な規制的役割を果たします.
- p53経路の調節は,心筋梗塞後の心臓の修復を促進し,血管性の強化のための有望な治療戦略です.
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