CD95/CD95リガンドの相互作用は,宿主に対する防衛における上皮細胞に起因し,Pseudomonas aeruginosaに感染する
H Grassmé1, S Kirschnek, J Riethmueller
1Department of Physiology, University of Tuebingen, Gmelinstrasse 5, 72076 Tuebingen, Germany.
まとめ
Pseudomonas aeruginosaの肺感染症は,CD95/CD95リガンド経路経由で細胞死を誘発する. このシステムをブロックすると,肺細胞が保護され,マウスのセプシスが予防され,感染における重要な役割が強調されます.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 微生物学 微生物学とは
背景:
- Pseudomonas aeruginosaは,重症で生命を脅かす肺感染症を引き起こす重要な病原体です.
- 肺上皮細胞は,呼吸器の健康と病原体に対する防御に不可欠です.
研究 の 目的:
- Pseudomonas aeruginosaによって誘発される肺上皮細胞アポトシスにおけるCD95/CD95リガンドシステムの役割を調査する.
- P. aeruginosa感染中の肺上皮細胞に対するCD95/CD95リガンド欠乏のインビボおよびインビトロ効果を決定する.
主な方法:
- ネズミと肺の上皮細胞に Pseudomonas aeruginosa が感染する.
- CD95およびCD95リガンド欠乏モデルを使用してアポトーシスの評価.
- セプシスの発達の評価 in vivo.
主要な成果:
- P. aeruginosaの感染は,肺上皮細胞の内生的なCD95/CD95リガンドシステムを活性化し,アポトーシスを誘発する.
- 皮質細胞のCD95またはCD95リガンドの欠乏は,in vitroおよびin vivoモデルにおいて,アポトーシスを著しく減少させた.
- CD95またはCD95リガンド欠乏したマウスは,正常なマウスとは異なり,P. aeruginosaの感染後に急速な敗血症を発症した.
結論:
- CD95/CD95リガンド系は,P. aeruginosaによって引き起こされる肺上皮細胞アポトーシスにおいて重要な役割を果たします.
- CD95/CD95リガンド経路を標的とした治療は,重度のP. aeruginosa肺感染症を緩和し,敗血症を予防するための治療戦略である可能性があります.
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