動脈壁の細胞の多系統化の可能性
Yin Tintut1, Zeni Alfonso, Trishal Saini
1Department of Medicine, David Geffen School of Medicine, UCLA, 10833 LeConte Ave, Los Angeles, Calif 90095-1679, USA. ytintut@mednet.ucla.edu
Circulation
|October 29, 2003
まとめ
血管細胞は,メゼンキマ幹細胞に似た複数の細胞タイプに微分化することができます. これらの細胞は,骨,軟骨,および滑らかな筋肉の発達の可能性を示し,動脈疾患の洞察を提供します.
科学分野:
- 血管生物学 血管生物学
- 幹細胞生物学 幹細胞生物学
- 組織工学は,組織工学である.
背景:
- 動脈内の子宮外組織 (骨,脂肪,軟骨,髄) の形成は,糖尿病や動脈硬化などの疾患において一般的です.
- 動脈における子宮外組織形成を駆動する根本的なメカニズムは,依然としてほとんど不明である.
- 牛の大動脈中枢細胞から派生した,加熱性血管細胞 (CVCs) と呼ばれる血管細胞の特定の亜集団は,以前,骨質芽細胞の分化と鉱化能力を示していた.
研究 の 目的:
- カルシフィケーション血管細胞 (CVCs) の多系統差異化可能性を調査する.
- CVCがメゼンキマ幹細胞に類似する特徴を持っているかどうかを判断する.
- 動脈内の子宮外組織形成の理解におけるCVCの潜在能力を探求する.
主な方法:
- 複数のメゼンキマ系 (コンドロゲン系,レオミオゲン系,ストロモゲン系,アディポゲン系) の分子および機能マーカーの評価.
- 細胞化学染色 (アルシアン青) とコラーゲンII型とIX型の遺伝子発現分析を用いた.
- 評価された滑らかな筋肉特異的遺伝子発現 (アルファアクチン,カルポニン,カルデスモン,ミオシン重鎖) と血液生成原始細胞のサポート能力.
主要な成果:
- CVCは,コラーゲンII/IX発現とアルシアンブルー染色を通じてコンドロゲン性潜在性を示した.
- CVCは,滑らかな筋肉に特異的なマーカーを表現する,レオミオジェニックの可能性を示した.
- CVCは,血球形成の原始細胞の成長を支えており,ストロモゲン性の可能性を示しており,複数の経路で多重性を保持しています.
結論:
- 動脈壁には,メゼンキマ幹細胞に似た,多能分化能力を持つ細胞が宿っている.
- これらの血管系由来細胞は,典型的なメゼンキマ幹細胞とは異なるユニークな分化レパートリーを持っています.
- 発見は,血管疾患における子宮外組織形成に寄与する新しい細胞メカニズムを示唆しています.
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