Foxp3は,AML1/Runx1と相互作用することで,T細胞の調節機能を制御する
Masahiro Ono1, Hiroko Yaguchi, Naganari Ohkura
1Department of Experimental Pathology, Institute for Frontier Medical Sciences, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan.
Nature
|March 23, 2007
まとめ
調節性T細胞 (T・R細胞) は免疫のバランスを維持する. 転写因子Foxp3はAML1と相互作用してIL-2とIFN-ガンマを抑制し,T(R) 細胞機能と免疫反応を制御する.
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.
- トランスクリプション・ファクターの機能
背景:
- 自然に発生するCD25+CD4+調節性T細胞 (T・R細胞) は,免疫的自己耐性および免疫ホメオスタシスの維持に不可欠です.
- T (R) 細胞は異常な免疫反応を抑制し,自己免疫疾患やアレルギーを予防します.
- 転写因子Foxp3はT(R) 細胞の発達と機能の重要な調節因子であり,子宮外の発現は抑制活性を与える.
研究 の 目的:
- Foxp3がT(R) 細胞の機能を制御する分子機構を明らかにし,その中には,サイトカインの産生とT(R) 細胞に関連した分子の発現を含む.
- 転写因子AML1 (急性骨髄性白血病1) /Runx1がT(R) 細胞関連遺伝子発現を調節する役割を調査する.
- T細胞媒介免疫応答を制御するためにFoxp3-AML1相互作用を標的とする可能性を調査する.
主な方法:
- 天然T (R) 細胞におけるFoxp3とAML1の相互作用を調査した.
- この相互作用がIL-2とIFN-ガンマの遺伝子発現に与える影響を分析した.
- T(R) 細胞関連分子と全体的な抑制活性に対する上昇調節への影響を評価した.
主要な成果:
- AML1/Runx1が,従来のCD4+T細胞におけるIL-2およびIFN-ガンマ遺伝子発現を活性化することを示した.
- Foxp3が自然T (R) 細胞におけるAML1と物理的に相互作用することを示した.
- このFoxp3-AML1相互作用がIL-2およびIFN-ガンマ生成を抑制し,T(R) 細胞分子を上調し,抑制活性を与えるという証拠を提供した.
結論:
- Foxp3とAML1の相互作用は,T(R) 細胞の機能と抑制活動を制御する重要なメカニズムです.
- Foxp3とAML1によるこの転写制御は,免疫ホメオスタシスの維持に不可欠である.
- Foxp3-AML1相互作用を標的にすることは,生理学的および病理学的条件下でT細胞媒介免疫反応を調節するための潜在的な戦略を提供します.
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