血管内エフェクターCD8 (((+) T細胞による肝臓の免疫監視
Luca G Guidotti1, Donato Inverso2, Laura Sironi3
1Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy; Department of Immunology and Microbial Sciences, The Scripps Research Institute, La Jolla, CA 92037, USA.
Cell
|April 21, 2015
まとめ
エフェクタ CD8(+) T細胞 (CD8 TE) は,血小板を使用して,肝臓のシヌソイドにドッキングし,その後,B型肝炎ウイルス感染中に肝細胞をウイルス抗原のために探査するためにクロールします. 肝繊維症は,この重要な免疫監視メカニズムを損なう.
科学分野:
- 免疫学 免疫学とは
- 肝臓病理学 肝臓病理学
- ウイルス学 ウイルス学 ウイルス学
背景:
- エフェクターCD8 (((+)) T細胞 (CD8 TE) は,肝臓におけるウイルス感染症の制御に不可欠です.
- B型肝炎ウイルス (HBV) などの肝炎型ウイルス感染症は,健康に重大な問題を抱えています.
研究 の 目的:
- 肝臓におけるCD8 TEホーミング,抗原認識,およびエフェクタ機能展開のメカニズムを明らかにする.HBV病原性中に.
- 肝繊維症がCD8 TE免疫監視に与える影響を調査する.
主な方法:
- 先進的なインビボ画像技術がHBV病原性のマウスモデルで使用されました.
- 分析は,肝臓シヌソイド内および肝細胞とのCD8 TEのダイナミックな相互作用に焦点を当てた.
主要な成果:
- CD44経由で血小板にドッキングすることで,肝臓のシヌソイドでCD8 TEを抑える.
- CD8 TEはシヌソイドに沿って活発に移動し,突起を広げて,肝細胞を抗原探査します.
- 抗原認識は,ダイアペデシスとは独立してエフェクター機能を誘発する.
- シヌソイド防衛と毛細血管の特徴である肝繊維症は,CD8 TEエフェクタ機能を阻害する.
結論:
- CD8 TEは,血小板の相互作用と肝細胞の直接検出を含む,肝臓における病原体制御のためのダイナミックな行動を示す.
- 肝繊維症はCD8 TEの免疫監視を著しく低下させ,感染または変異した肝細胞の制御を阻害する可能性があります.
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