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Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
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デウビキチナゼUSP10は,内皮におけるノッチ信号を調節する
1Angiogenesis and Metabolism Laboratory, Max Planck Institute for Heart and Lung Research, D-61231 Bad Nauheim, Germany.
まとめ
ウビキチン特異ペプチダゼ10 (USP10) は,内皮細胞におけるNOTCH1細胞内領域 (NICD1) を安定させることで,ノッチ信号伝達を調節する. USP10 デウビキチナゼの活性がノッチ反応を微調整し,血管の発達と血管新生発芽に影響する.
科学分野:
- 分子生物学
- 発達生物学
- 細胞生物学
背景:
- ノッチ・シグナリングは血管形態形成と内皮細胞 (EC) の発芽に不可欠です.
- 血管の発達にはノッチ活動の正確な調節が不可欠ですが,ECの制御は不明です.
研究 の 目的:
- 内皮細胞内でのノッチ信号伝達の調節におけるユビキチン特異ペプチダゼ10 (USP10) の役割を調査する.
- USP10がNOTCH1細胞内領域 (NICD1) の安定性と活性に影響を与えるメカニズムを解明する.
主な方法:
- USP10とNICD1の相互作用を評価するための共免疫プレシピテーション.
- NICD1タンパク質の濃度と安定性を決定するウェスタン・ブロッティング
- ノッチ標的遺伝子発現を測定する定量的リアルタイムPCR
- 内皮特異的な Usp10 欠損を有するマウスモデルを用いた in vivo 研究.
主要な成果:
- USP10はNICD1と直接相互作用し,そのユビキチン依存性分解を遅らせます.
- ECにおけるUSP10の喪失は,NICD1の多量性と安定性を低下させ,その結果,Notch標的遺伝子発現を減少させます.
- ネズミにおけるUsp10の内皮切除は,血管の芽生えを促進し,過剰なNICD1によって引き起こされたパターンの欠陥を修正する.
結論:
- USP10はNICD1のデウビキチナゼとして作用し,内皮細胞の活性化されたNOTCH1受容体を安定させる.
- USP10は,血管新生発芽中の内皮ノッチ信号の微調整に重要な役割を果たします.
- USP10をターゲットにすることで,血管の発達と修復を調節する戦略を提供できます.
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