NIK-SIX信号軸は,非正規のNF-κBを標的として静止することによって炎症を制御する
Zixu Liu1, Katrina B Mar1, Natasha W Hanners2
1Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Nature
|March 22, 2019
まとめ
非正規のNF-κB経路は免疫と発達を調節する. 研究者らは,NIKによって再活性化されたSIX1およびSIX2転写因子が,炎症性遺伝子発現とこの経路へのフィードバックを制御することを発見しました.
科学分野:
- 免疫学
- 分子生物学
- 細胞シグナリング
背景:
- 非正規のNF-κB経路は免疫反応と発達に不可欠ですが,その転写的調節は十分に理解されていません.
- NF-κB誘導キナーゼ (NIK) は,この経路における速度制限酵素である.
- 調節不良は免疫疾患や癌と関連しています
研究 の 目的:
- 非正規のNF-κB経路の転写調節メカニズムを調査する.
- このシグナリングカスケードの新しいコンポーネントとレギュレータを特定する.
- SIX1とSIX2の免疫反応と疾患における役割を調査する.
主な方法:
- 非正規のNF-κB経路におけるSIX1とSIX2の役割を調査した.
- SIXタンパク質を再活性化するために,ユビキチンプロテアソーム経路のNIK媒介抑制を利用した.
- 炎症性遺伝子プロモーターのSIX1およびSIX2ターゲティングとRELA/RELBとの相互作用を分析した.
- エンド毒性ショックとがんのマウスモデルでのSIX1の効果を評価した.
主要な成果:
- SIX1とSIX2は,非正規のNF- kB経路の不可欠な構成要素として特定されました.
- NIKは,ユビキチンプロテアソーム経路を抑制することによって,マクロファージのSIXタンパク質を再活性化します.
- SIX1とSIX2はRELAとRELBを直接抑制し,ネガティブなフィードバックループを形成する.
- SIX1は炎症を抑制し,マウスの回復を助長した.
- SIX1とSIX2は,化学療法による死から肺がん細胞を保護しました.
結論:
- 新しいNIK-SIX信号軸が 炎症遺伝子の発現を調整します
- この軸は生理的な免疫と 癌のような病理的な状態の両方で 重要な役割を果たします
- SIXタンパク質は炎症性疾患や癌の治療対象となる可能性があります.
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