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Published on: March 2, 2014
STAT6のSTINGによる活性化は,抗ウイルス性先天性免疫にとって極めて重要です
Huihui Chen1, Hui Sun, Fuping You
1State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China.
Cell
|October 18, 2011
まとめ
シグナルトランスデューサーとトランスクリプション6のアクティベーター (STAT6) は,ウイルス感染症中の先天性免疫に不可欠です. それは,免疫細胞の帰還を制御するために,エンドプラズマの網膜から信号を送り,適応免疫における既知の役割を補完します.
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.
- ウイルス学 ウイルス学 ウイルス学
背景:
- シグナルトランスデューサーおよびトランスクリプション6のアクティベーター (STAT6) は,主に適応免疫における役割で知られており,細胞外サイトカインからの信号を媒介します.
- 生まれつきの免疫反応,特にウイルス感染症に対するその機能は,まだあまり理解されていません.
研究 の 目的:
- ウイルス感染時の先天性免疫シグナル伝達におけるSTAT6の役割を調査する.
- STAT6活性化のメカニズムと,ウイルス刺激への反応におけるその下流効果を解明する.
主な方法:
- ウイルスの感染モデルとサイトプラズマ核酸を用いて,先天的な免疫経路を誘発した.
- エンドプラズマ網膜におけるSTAT6の徴募とリン酸化を研究した.
- STAT6二分化,核転位,標的遺伝子誘導を分析した.
- Stat6のノックアウトマウスを使って,ウイルス感染に対するインビヴォの感受性を評価した.
主要な成果:
- STAT6は,正規のサイトカインシグナル伝達経路とは独立して,ウイルス感染症への反応として,先天的な免疫シグナル伝達に不可欠です.
- ウイルスとサイトプラズマ核酸はSTINGを活性化させ,STAT6をTBK1.1によるリン酸化のためにエンドプラズマ網膜に勧誘する.
- 酸化されたSTAT6は二酸化し,核に転位し,免疫細胞のホームリングに関与する遺伝子を誘発する.
- ウイルスによるSTAT6の活性化は,細胞型のシグナル伝達における細胞型特異的な役割とは異なり,細胞タイプ全体で広く発生します.
- Stat6欠乏したマウスは,ウイルス感染症に対する感受性が高くなります.
結論:
- STAT6は免疫において二重の役割を果たし,サイトカインによる適応性免疫応答と,ウイルス感染症中の先天性免疫応答の両方を媒介する.
- エンドプラズマ網膜は,ウイルスの挑戦中にSTAT6の活性化のための重要なプラットフォームとして機能します.
- STAT6は,ウイルスに対する先天的な免疫応答の重要な調節体であり,免疫細胞の密輸と宿主防御に影響を与えます.
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