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Isolation of Pulmonary Artery Smooth Muscle Cells from Neonatal Mice
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Gタンパク質結合受容体キナーゼ相互作用タンパク質-1は,肺血管の発達に必須です
Jinjiang Pang1, Ryan Hoefen, Gloria S Pryhuber
1Aab Cardiovascular Research Institute and the Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.
Circulation
|March 11, 2009
まとめ
Gタンパク質結合受容体キナーゼ相互作用タンパク質-1 (GIT1) は,肺の発達に不可欠です. GIT1のノックアウトマウスは,肺血管の発達障害を示し,血管内皮成長因子 (VEGF) 信号伝達におけるその役割を強調しています.
科学分野:
- 細胞生物学 細胞生物学
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
背景:
- Gタンパク質結合受容体キナーゼ相互作用タンパク質-1 (GIT1) は,様々な細胞プロセスに関与する多領域の支架タンパク質です.
- 以前の研究では,GIT1が受容体内化,焦点粘着再構築,信号伝達経路における役割を強調した.
- この研究の前に,GIT1の機能を調査した in vivo 研究はありませんでした.
研究 の 目的:
- GIT1.1の重要なインビボ機能を調査する.
- 肺血管の発達と血管新生におけるGIT1の役割を決定する.
- 血管内皮成長因子 (VEGF) 信号伝達におけるGIT1のメカニズムを解明する.
主な方法:
- 伝統的なGIT1ノックアウトマウスモデルの生成.
- GIT1ノックアウトマウスの病理学的検査で,肺の発達に焦点を当てました.
- ノックアウトマウスの培養内皮細胞と肺組織におけるVEGFシグナル伝達経路の調査.
- フォスフォリファーゼ-ガンマ (PLCgamma) と細胞外信号調節キナーゼ1/2 (ERK1/2) のリン酸化と活性に関する評価.
主要な成果:
- GIT1ノックアウトマウスは,有意な生後死亡率 (約60%) を示した.
- 観察された主な異常は,肺血管の縮小とアルベオラ空間の増加による肺発達障害でした.
- 内皮細胞におけるGIT1のノックダウンは,PLCgammaとERK1/2.2.のVEGF媒介のリン酸化を減少させた.
- 産後GIT1ノックアウトマウスの肺にPLCgammaとERK1/2の活性低下が観察されました.
結論:
- GIT1は,肺血管の発達において重要な役割を果たします.
- GIT1は,PLCgammaとERK1/2信号伝達経路のVEGF誘発活性化を調節する.
- これらの発見は,血管新生におけるGIT1の新しいin vivo機能を確立しています.
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