CD8(+) ウイルスに感染した組織へのTリンパ球の動員には,CD4(+) T細胞の助けが必要です
Yusuke Nakanishi1, Bao Lu, Craig Gerard
1Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut 06520, USA.
Nature
|November 10, 2009
まとめ
CD4 ((+) Tヘルパー細胞は,エフェクター細胞毒性CD8 ((+) Tリンパ球 (CTL) 細胞が感染した組織に移動する際に極めて重要です. これらのCD4 ((+) T細胞は,IFN-ガンマとケモカインを介してCTLを間接的に誘導し,病原体のクリアランスを可能にします.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- T細胞免疫学について
背景:
- CD4 ((+) Tヘルパー細胞は,CD8 ((+) Tリンパ球 (CTL) 応答の開始と維持に不可欠です.
- CD4 ((+)) T細胞がCTL応答のエフェクタフェーズに役立つ役割は,まだほとんど研究されていない.
研究 の 目的:
- CD4 ((+)) Tヘルパー細胞が,組織レベルでのエフェクターCTL応答の制御における機能を調査する.
- CD4 ((+)) T細胞が感染中にCTL活動に影響を与えるメカニズムを解明する.
主な方法:
- T細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関するT細胞の活性化と移動に関する研究
- 感染した組織におけるサイトカイン (IFN-ガンマ) とケモカイン発現の分析.
- CD4 ((+)) T細胞の存在と欠如におけるエフェクターCTLの移動能力を調査する.
主要な成果:
- エフェクタCTLは,感染した周辺組織に効率的に侵入するためにCD4 (((+) T細胞の支援を必要とします.
- CD4 ((+) Tヘルパー細胞は,IFN-ガンマの分泌を通じて間接的にこの効果を媒介する.
- IFN-ガンマは,局所的なケモカインの産生を誘導し,それがCTLの感染部位への移行を誘導する.
結論:
- CD4 ((+) Tヘルパー細胞は,エフェクタCTL機能をオーケストラする上で,これまで認識されていない重要な役割を果たしています.
- CD4 ((+) T細胞由来信号は,外周感染部位にエフェクタCTLを動員するために不可欠です.
- このCD4 ((+) T細胞媒介の動員は,感染した細胞を効果的に排除するために不可欠です.
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