Foxp3ロカスにあるcis要素によって,T細胞同一性の遺伝を制御する
Yongqiang Feng1, Aaron Arvey1, Takatoshi Chinen1
1Howard Hughes Medical Institute and Immunology Program, Ludwig Center at Memorial Sloan-Kettering Cancer Center, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
Cell
|August 16, 2014
まとめ
特定のDNA要素であるCNS2は,IL-2とSTAT5.5を感知することで,調節性T (Treg) 細胞の同一性を維持する. これは,慢性炎症を抑制し,Treg細胞の損失を防ぐために不可欠なFoxp3発現を保証します.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- 多細胞生物は,特異な機能のために特化した細胞タイプに依存しています.
- ストレス下での細胞のアイデンティティと機能の維持は不可欠ですが,よく理解されていません.
- Foxp3によって定義される調節性T (Treg) 細胞は,自己免疫を防ぐ.
研究 の 目的:
- トレグ細胞系統の遺伝のメカニズムを解明する.
- トレグ細胞の安定性におけるFoxp3内在元素CNS2の役割を調査する.
主な方法:
- Foxp3イントロニック要素 CNS2.2.の分析
- CNS2,IL-2,STAT5シグナル伝達との相互作用を調査する.
- CNS2がFoxp3発現とTreg細胞機能に与える影響を評価する.
主要な成果:
- CNS2は,成長因子IL-2とその下流ターゲットSTAT5.5のセンサーとして機能する.
- CNS2は,特にIL-2が制限されている場合,分裂するTreg細胞のFoxp3発現を維持します.
- CNS2は,炎症誘発性サイトカインとTreg細胞のエフェクター細胞への分化によって誘発されるFoxp3の損失を防ぐ.
結論:
- CNS2は,安定したFoxp3遺伝とTreg細胞系統のアイデンティティに不可欠です.
- このメカニズムは,慢性炎症の効果的な抑制を保証します.
- この発見は,分化細胞状態を維持するための一般的な原理を示唆しています.
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