心筋梗塞は動脈硬化を加速する
Partha Dutta1, Gabriel Courties, Ying Wei
1Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA.
Nature
|July 6, 2012
まとめ
心筋梗塞と脳卒中は,幹細胞を動員してより多くの単細胞を生成することで,動脈硬化症を悪化させます. この発見は,心血管疾患の進行を治療するための新しい方法を提供します.
科学分野:
- 心血管科学 心血管科学
- 免疫学 免疫学とは
- 血液学 ヘマトロジ
背景:
- ミエロイド細胞は,動脈硬化性プラークの破裂に寄与し,心筋梗塞と脳卒中につながる.
- 再発性心血管疾患は,未知のメカニズムによる生存者の間で一般的です.
研究 の 目的:
- 慢性動脈硬化に,心筋梗塞や脳卒中などの不全性損傷に対する全身反応がどのように影響するかを調査する.
- 発血不全後の動脈硬化性プラークにおける単細胞増殖の源を特定する.
主な方法:
- 心筋梗塞または脳卒中を患ったApoe-/-マウスモデルを使用した.
- 動脈硬化病変のサイズと形状を分析した.
- 単細胞の募集と血液形成の幹細胞と祖先細胞の動員を研究した.
- 交感神経系の信号伝達の役割を調べました.
主要な成果:
- 缺血性損傷は動脈硬化を加速し,Apoe-/-マウスではより大きく,より進行した病変を引き起こした.
- 単細胞募集は,心筋梗塞または脳卒中後数週間でプラークに有意に増加しました.
- 心筋梗塞は,交感性神経系の信号伝達を通じて,骨髄から血液形成性幹細胞と原始細胞の放出を誘発した.
- これらの祖先は臓に移動し,持続的な高血圧単細胞生産につながった.
結論:
- 缺血性損傷に対する全身反応は,単細胞の産生を刺激することで,動脈硬化症を悪化させる.
- 交感性神経系の信号伝達は,心筋梗塞後の血液形成幹細胞と前身細胞を動員する上で重要な役割を果たします.
- この研究は,不全性イベントと加速性アテロゲネシスを結びつける新しいメカニズムを明らかにし,潜在的な治療目標を示唆しています.
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