T細胞の枯渇,共刺激,自己免疫と感染症における臨床結果
Eoin F McKinney1, James C Lee1, David R W Jayne2
11] Department of Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's Hospital, Hills Road, Cambridge CB2 0QQ, UK [2] Cambridge Institute for Medical Research, University of Cambridge, Cambridge Biomedical Campus, Cambridge CB2 0XY, UK.
Nature
|July 1, 2015
まとめ
慢性感染症中に免疫反応を損なう状態であるT細胞の枯渇は,驚くべきことに,自己免疫疾患のより良い結果を予測します. この免疫細胞の行動を理解することで,自己免疫性および炎症性疾患に対する新しい治療目標が提供されます.
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.
- 翻訳医学は翻訳医学である.
背景:
- 自身免疫疾患および感染症における臨床的アウトカムには,患者から患者への有意な変動が見られます.
- T細胞の枯渇は,慢性感染症中に免疫反応を抑制し,病原体の持続性を促進する既知のメカニズムです.
研究 の 目的:
- 慢性感染症と自己免疫疾患における臨床結果の異質性におけるCD8 T細胞枯渇シグネチャーの役割を調査する.
- T細胞枯渇の分子要因と,治療目標としての可能性を探求する.
主な方法:
- 慢性ウイルス感染症および自己免疫疾患を有する患者のCD8T細胞枯渇に関連した転写シグネチャの分析.
- 人間のCD8T細胞におけるT細胞抗原受容体刺激とCD2共刺激を操作するIn vitro実験.
- 同刺激/疲労シグネチャーの独立したデータセットと代理マーカーを用いた検証.
主要な成果:
- CD8T細胞の枯渇シグネチャーは,慢性感染症のウイルスのクリアランスの低下と相関しているが,自己免疫疾患のより良い予後を予測する.
- 自己免疫では,強固なCD4 T細胞共刺激は,CD8 T細胞枯渇と逆に関連しています.
- インビトロモデルでは,抗原受容体刺激とCD2共刺激がT細胞疲労に及ぼす影響が確認され,PD-1シグナリングは非疲労状態を減少させた.
結論:
- T細胞の枯渇は,様々な免疫媒介疾患における臨床結果の決定において重要な役割を果たします.
- T細胞の枯渇経路をターゲットにすることは,自己免疫性および炎症性疾患に対する有望な治療戦略です.
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