調節性T細胞の安定した抑制活動には,転写因子Heliosが必要である
Hye-Jung Kim1, R Anthony Barnitz2, Taras Kreslavsky1
1Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Microbiology and Immunobiology, Division of Immunology, Harvard Medical School, Boston MA.
Science (New York, N.Y.)
|October 17, 2015
まとめ
ヘリオスは,自己免疫を防ぐために,調節性T細胞 (Tregs) を安定させる. Tregsのヘリオスの障害は,マウスの不安定な表型,機能低下,自己免疫疾患につながる.
科学分野:
- 免疫学
- 分子生物学
- 自己免疫性
背景:
- 免疫ホメオスタシスは,自己免疫を防ぐために,調節性T細胞 (Tregs) に依存する.
- Tregsは自己反応性があるため,安定した抑制性フェノタイプを維持しなければなりません.
研究 の 目的:
- Tregの安定性と機能における転写因子Heliosの役割を調査する.
- Treg媒介の免疫調節と自己免疫に対するヘリオス発現障害の影響を決定する.
主な方法:
- FoxP3 ((+)) CD4およびQa-1-制限されたCD8Tregsにおけるヘリオス発現の分析
- ヘリオス欠乏マウスにおけるTregフェノタイプ,調節活動,STAT5経路の活性化に関する評価.
- トレグ機能障害の文脈における自己免疫症状の評価
主要な成果:
- Tregsにおけるヘリオス発現の障害は,異常な調節活動と自己免疫を引き起こす.
- ヘリオス欠乏症は,FoxP3が減少し,エフェクターサイトカインが増加した不安定なTregフェノタイプにつながる.
- ヘリオスはSTAT5経路の活性化,Tregの生存,そしてCD8Tregの末端分化防止に不可欠です.
結論:
- ヘリオスは,炎症反応中のTregsの安定化に不可欠な重要な転写因子です.
- ヘリオス欠乏症は,Tregの不安定性とそれに関連する自己免疫状態の遺伝的説明を提供します.
- ヘリオスをターゲットにすることで 自己免疫疾患の治療戦略を提案できます
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