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RIPK1はZBP1媒介による死滅を抑制し,炎症を抑制する.

  • 0Institute for Genetics, Centre for Molecular Medicine (CMMC), and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany.
Nature +

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2016年11月8日

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2016年11月8日

PubMedで要約を見る

まとめ

この要約は機械生成です。

受容体相互作用タンパク質キナーゼ1 (RIPK1) は,Z- DNA結合タンパク質1 (ZBP1) 誘発のネクロプトーシスを阻害することによって,皮膚の炎症と胚の致死性を防止します. この研究は,ZBP1媒介の細胞死と炎症を予防する上で,RIPK1の重要な役割を明らかにしています.

科学分野

  • 細胞生物学
  • 免疫学
  • 発達生物学

背景

  • 受容体相互作用タンパク質キナーゼ1 (RIPK1) は,細胞死と炎症を調節する二重の役割を持っています.
  • RIPK1のキナーゼ活動はアポトーシスと死滅を促進し,そのキナーゼ独立機能は発達とバリアの完全性にとって不可欠である.
  • RIPK1がRIPK3- MLKL媒介性死滅を抑制するメカニズムは以前は知られていなかった.

研究 の 目的

  • RIPK1がRIPK3-MLKL依存性死滅を防ぐメカニズムを解明する.
  • Z-DNA結合タンパク質1 (ZBP1) 媒介の皮膚炎と胚の発達におけるRIPK1の役割を調査する.

主な方法

  • 皮膚特異的なRIPK1ノックアウトマウスと変異したRIPK1 (RIPK1<sup>mRHIM</sup>) を利用した.
  • 遺伝子組み換えマウスモデルでのケラチノサイト死滅,皮膚炎,および胎内死亡率の評価.
  • RIPK1,RIPK3,ZBP1のタンパク質相互作用は,細胞アッセイを用いて調査された.

主要な成果

  • RIPK1は,ZBP1によるRIPK3とMLKLの活性化を阻害することで,皮膚の炎症を予防します.
  • RIPK1のRHIMドメインの変異は,RIPK3,MLKL,またはZBP1の欠陥によって救済された,胎児死亡および皮膚炎をもたらしました.
  • RIPK1のRHIMドメインは,ZBP1とRIPK3の結合を防ぐことがわかった.

結論

  • RIPK1はZBP1誘発の死滅を阻害し,それによって胎児死亡率と皮膚炎症を予防する.
  • ZBP1は炎症の重要な媒介体として特定され,抗ウイルス防御を超えてその既知の機能を拡張しています.
  • ZBP1の調節不良は,死滅に関連した炎症性疾患に寄与する可能性があります.

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