FOXO3-IRF7遺伝子の調節回路は,抗ウイルス反応の炎症的な続きを制限する
Vladimir Litvak1, Alexander V Ratushny, Aaron E Lampano
1Seattle Biomedical Research Institute, Seattle, Washington 98109, USA.
Nature
|September 18, 2012
まとめ
FOXO3は,IRF7の転写を制御することによって,抗ウイルス反応の負の調節剤として作用します. この発見は,免疫防衛のバランスと過剰な炎症の予防に不可欠な新しい調節回路を明らかにしています.
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.
- システム生物学 システム生物学
背景:
- 抗ウイルス反応には,感染と闘い,炎症を制限するために,正確な調節が必要です.
- 1型インターフェロン (IFN-I) は重要な抗ウイルス媒介体であり,転写はインターフェロン調節因子 (IRF) によって制御されます.
- 複雑なIRF遺伝子規制ネットワークには,複雑なフィードバックループが含まれています.
研究 の 目的:
- システム生物学を用いてインターフェロン反応を制御する複雑な相互作用を解明する.
- 抗ウイルス遺伝子発現の新たなレギュレータを特定する.
- インターフェロン経路におけるFOXO3の役割を調査する.
主な方法:
- 転写因子機能を予測するための偏らないシステム生物学のアプローチ.
- Foxo3-nullマウスのマクロファージを用いた検証.
- ゲノム全体の位置分析と遺伝子削除研究.
主要な成果:
- FOXO3は,抗ウイルス遺伝子のサブセットの負の調節体として特定されました.
- Irf7遺伝子はFOXO3.3の重要な標的として特定されました.
- FOXO3,IRF7,IFN-Iを含む一貫したフィードフォワード規制回路が実証されました.
結論:
- FOXO3は,Irf7の転写を否定的に調節し,新しい調節回路を形成する.
- このFOXO3-IRF7回路は,インターフェロン経路に適切なレベルを設定するのに役立ちます.
- この回路は,抗ウイルス反応の保護効果と潜在的なダメージのバランスをとります.
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