クリオピリンは,毒素とATPへの反応として炎症体を活性化します
Sanjeev Mariathasan1, David S Weiss, Kim Newton
1Molecular Oncology Department, Genentech Inc, 1 DNA Way, South San Francisco, California 94080, USA.
Nature
|January 13, 2006
まとめ
クリオピリンは,ATPやバクテリアの成分のような特定のトリガーによる炎症体の活性化に不可欠です. この先天的な免疫経路は,重要な炎症性サイトカインであるインタールイキン-1βおよびインタールイキン-18.0を処理するために,クリオピリンを必要とします.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
背景:
- インフラマソームは先天性免疫に不可欠であり,カスパゼ-1を活性化してIL-1βとIL-18を処理する.
- アダプタータンパク質ASCは,炎症ゾームの組み立てとカスペーゼ-1の活性化に不可欠です.
- クリオピリン (NALP3/CIAS1) 変異は,過剰なIL-1β産生による自己炎症性疾患を引き起こす.
研究 の 目的:
- 様々な刺激によって炎症細胞の活性化におけるクライオピリンの役割を調査する.
- カスパゼ-1の活性化のためにクリオピリンを必要とするトリガーを明らかにする.
主な方法:
- クリオピリン欠乏症 (Cias1-/-) とASC欠乏症 (Asc-/-) のマクロファージを使用した.
- トール型受容体アゴニスト,ATP,ニジェリシン,マイトトキシン,および細菌病原体 (グラム陰性およびグラム陽性) による刺激されたマクロファージ.
- カスパース-1の活性化とIL-1βとIL-18の分泌を評価した.
主要な成果:
- クリオピリン欠乏マクロファージは,ATP,ニジェリシン,マイトトキシンに反応してカスパゼ-1を活性化することができなかった.
- IL-1βの放出は,ATP,ニジェリシン,マイトトキシン刺激に対するクリオピリン依存であった.
- クリオピリンは,グラム陰性細菌による炎症体の活性化には欠かせないものであったが,グラム陽性細菌 (S. aureus,L. monocytogenes) による活性化にはASCと共に必要であった.
結論:
- クリオピリンは,ATP,ニゲリシン,マイトトキシン,およびグラム陽性細菌によって誘発される炎症体の活性化に不可欠です.
- クリオピリンへの要求は,特定の炎症性の刺激によって異なります.
- これらの発見は,先天的な免疫信号伝達経路におけるASCとクリオピリンが果たす役割の違いを明らかにしています.
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