Nr4a1依存型Ly6C (低) モノサイトは,内皮細胞をモニターし,その除去をオーケストラ化します
Leo M Carlin1, Efstathios G Stamatiades, Cedric Auffray
1Centre for Molecular and Cellular Biology of Inflammation, King's College London, London SE1 1UL, UK.
Cell
|April 16, 2013
まとめ
Ly6C (低) モノサイトは,血管内管家として機能する. 彼らは危険信号に反応して中性粒子を介して内皮細胞死をオーケストラ化し,細胞の残骸をクリアします.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 血管生物学 血管生物学
背景:
- 血管ホメオスタシスにおけるNr4a1依存型Ly6C (低) モノサイトの正確な役割は完全に理解されていません.
- これらの単細胞は通常,毛細血管に存在し,マイクロ粒子を拾い集める.
研究 の 目的:
- 炎症刺激に反応するLy6C (低) モノサイトの機能を解明する.
- これらのモノサイトが内皮細胞と中性粒子を相互作用するメカニズムを調査する.
主な方法:
- 遺伝子組み換えマウスモデルを使用した (Nr4a1(-/-),Itgal(-/-),Tlr7(ホスト-/-BM+/+),Cx3cr1(-/-)).
- 投与されたTLR7依存の危険信号は,腎臓の恒常性を乱す.
- 中性粒子の減少と,中性粒子の増殖を阻害する遺伝子操作を用いた.
主要な成果:
- Ly6C (低) モノサイトは,TLR7の活性化時に血管内保持され,中性粒子を募集します.
- この相互作用は,焦点内皮細胞の死滅を引き起こし,その後の残骸は単細胞によって除去されます.
- 単細胞の発達,保持,または中性粒子の募集の遺伝的または薬理学的ブロックは,内皮細胞死亡を無効化します.
結論:
- Ly6C (低) モノサイトは血管内管理者として機能し,危険信号に対する中性粒子の媒介による内皮細胞死反応を開始します.
- このプロセスは,TLR7のシグナル伝達によって緊密に制御され,モノサイトによって残骸の後に起こるファゴサイトスを含みます.
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