T-ベットとエオメソダーミン欠乏したCD8+T細胞によるウイルス感染に対する異常型17型反応
Andrew M Intlekofer1, Arnob Banerjee, Naofumi Takemoto
1Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, PA 19104, USA.
まとめ
転写因子T-betとエオメソドルミン (Eomes) は,CD8+T細胞が細胞内病原体に対する細胞毒殺菌剤になるために極めて重要です. それらなしで,CD8+T細胞は,効果的なウイルス防御の代わりに有害な炎症を促進します.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- ウイルス学 ウイルス学 ウイルス学
背景:
- CD8+T細胞は,細胞内病原体感染症の制御に不可欠です.
- 細胞毒性CD8+T細胞は,感染した細胞を排除し,サイトカインを分泌する.
- CD8+T細胞の分化経路は,宿主防御の鍵となる.
研究 の 目的:
- ウイルス感染症中のCD8+T細胞の分化における転写因子T-betとエオメソダーミン (Eomes) の役割を調査する.
- 免疫反応と宿主病理に対するT-betとEomesの欠如の影響を決定する.
主な方法:
- T-betとEomesが欠けているマウスにおけるCD8+T細胞の微分化の分析.
- リンパ球性膜炎ウイルス (LCMV) を用いた感染モデル.
- T細胞系統のコミットメントと宿主の炎症反応の評価.
主要な成果:
- T-betとEomesに欠けているCD8+T細胞は,細胞毒キラーに発展することができません.
- これらの細胞は,Tヘルパーのような,インタールイキン17を分泌する系統に微分化します.
- T細胞にT-betとEomesが欠けているマウスは,中性粒子の浸透によって特徴づけられる重度の炎症性シンドロームを発症します.
結論:
- T-betとEomesは,CD8+T細胞を細胞内病原体に対する効果的な細胞毒性エフェクタ機能に誘導するために不可欠です.
- これらの因子の欠如は,異常なCD8+T細胞の分化につながり,有害な炎症と自己免疫性病理を促します.
- これらの転写因子は,ウイルス感染症の際にCD8+T細胞のヘルパー型ではなく,適切な細胞毒性の運命を保証する.
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