炎症ゾームは,サイトゾール微生物と宿主DNAを認識し,先天的な免疫反応を誘発します
Daniel A Muruve1, Virginie Pétrilli, Anne K Zaiss
1Department of Medicine, University of Calgary, Alberta T2N 4N1, Canada.
Nature
|February 22, 2008
まとめ
インフラマソームは,先天的な免疫複合体であり,ウイルスやバクテリアの細胞質DNAを検出します. この感知は,Tollのような受容体とは独立して,炎症性反応を誘発し,炎症ソームを強調します.
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.
- 感染症 感染症とは
背景:
- 生まれながらの免疫系は,核酸のような病原体関連分子パターン (PAMP) を検出します.
- ウイルスのRNAとDNAは,トール型受容体 (TLR) と細胞質センサーによって認識されます.
- TLRシグナル伝達以外のウイルスに対する炎症反応は完全に理解されていません.
研究 の 目的:
- 内部化されたアデノウイルスDNAを感知する炎症体の役割を調査する.
- DNA誘発の炎症性サイトカイン生成のメカニズムを解明する.
主な方法:
- 内部化されたアデノウイルスDNAによるマクロファージ刺激.
- プロインターリューキン-1β成熟の評価.
- NALP3とASC欠乏したマウスと細胞を用いた研究.
- 感染した細菌,ウイルス,宿主DNAの分析.
主要な成果:
- 内化されたアデノウイルスDNAは,NALP3とASC経由でマクロファージのプロインタールユーキン-1β成熟を誘導する.
- NALP3およびASC欠乏したマウスは,アデノウイルスに対する先天性炎症反応の減少を示しています.
- インフラマソームによる細胞塩基DNA感知はASCに依存するが,感染したDNAにはNALP3に依存しない.
- このDNAセンシング経路は,TLRやインターフェロン調節因子とは独立して動作する.
結論:
- インフラマソームは,ウイルスおよび宿主DNAを含む潜在的に危険な細胞質DNAを感知します.
- この経路は,ウイルス感染症に対する先天的な免疫反応に大きく貢献します.
- インフラマソームは,PAMPを超えて様々な危険信号を認識する上で重要な役割を果たします.
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