非正規の炎症ホルモンの活性化は,カスパース-11を標的とする
Nobuhiko Kayagaki1, Søren Warming, Mohamed Lamkanfi
1Department of Physiological Chemistry, Genentech Inc., South San Francisco, California 94080, USA. kayagaki@gene.com
Nature
|October 18, 2011
まとめ
カスパース-11は,カスパース-1を活性化し,IL-1β.を生成することによって,細菌感染に対する先天性免疫応答を起動するために不可欠です. カスパース-11の喪失は,マウスを致命的なエンドトキシンショックから保護する.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
背景:
- NLRsとASCを含む炎症細胞の活性化は,先天的な免疫においてIL-1βとIL-18の生成に不可欠である.
- カスパース-1の活性化は,この炎症性サイトカイン生成に不可欠と考えられています.
研究 の 目的:
- バクテリア感染時の炎症体活性化とサイトカイン生成におけるカスパース-11の役割を調査する.
- 生まれながらの免疫反応におけるカスパース-1とカスパース-11の異なる役割を明らかにする.
主な方法:
- Casp11遺伝子標的マウス (Casp11(-/-) を含むC57BL/6および株129のマウスを利用しました.
- 様々な細菌種 (E. coli,C. rodentium,V. cholerae),ATP,単一ナトリウムウラートで刺激されたマクロファージのIL-1β産生を分析した.
- バクテリアの人工染色体トランスゲンを採用して,欠乏したマクロファージでカスパース11を発現させる.
主要な成果:
- カスパース-11は,E. coli,C. rodentium,V. choleraeに対する反応として,カスパース-1の活性化とIL-1βの生成に不可欠です.
- 株129のマウスはCasp11のロカスに欠陥があり,IL-1βの産生を阻害しています.
- カスパース1ではなく,カスパース11は,非正規の炎症性マクロファージ細胞死を媒介する.
- カスパース-11の喪失は,致死性のあるリポポリサッカライドに防御します.
結論:
- Caspase-11は,細菌感染症に対する先天的な免疫反応において,決定的な,非正規的な役割を果たします.
- カスパゼ""は,カスパゼ"に依存する炎症経路と独立する炎症経路の両方をオーケストラします.
- カスパース-11とカスパース-1には,非正規の炎症体活性化において,異なる活性化剤が存在する可能性が高い.
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