Zfp42323によるプレアディポサイト決定の転写制御
Rana K Gupta1, Zoltan Arany, Patrick Seale
1Department of Cancer Biology and Division of Metabolism and Chronic Disease, Dana-Farber Cancer Institute and Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|March 5, 2010
まとめ
研究者らは,亜鉛指タンパク質Zfp423を脂肪細胞発達の重要な調節因子として特定した. この発見は,プレアディポサイト決定を理解することによって,肥満とエネルギーバランスの新しい洞察を提供します.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- メタボリック研究
背景:
- 肥満は世界的な健康危機であり,エネルギーバランスと脂肪細胞 (脂肪細胞) の発達についてより深く理解する必要がある.
- プレアディポサイトがアディポサイトに差異化することはPPARgammaによって調節されるが,上流の分子メカニズムは不明である.
研究 の 目的:
- プレアディポサイト決定に関与する新しい転写因子を特定する.
- アディポゲネシスにおけるZfp423の役割とその調節メカニズムを解明する.
主な方法:
- プリアディポス・フィブロブラストの濃縮因子を特定するために,転写成分の定量分析.
- 細胞系 (NIH 3T3, 3T3-L1) でZfp423の子宮外発現とshRNA媒介によるノックダウン.
- Zfp423欠乏マウス胚における脂肪細胞の微分化の分析.
主要な成果:
- Zfp423は,プレアディポス線維芽細胞に濃縮された亜鉛指タンパク質として特定されました.
- エクトピックZfp423発現は,PPARgammaを活性化することで,NIH 3T3細胞におけるアディポサイト分化を引き起こした.
- 減少したZfp423レベルは,3T3-L1細胞とマウス胚におけるPparg発現とアディポゲネシスを低下させた.
- Zfp423は,Pparg.を調節するために,SMAD結合能力に依存するBMPシグナリングを増幅します.
結論:
- Zfp423は,プレアディポサイト決定の重要な転写調節体です.
- Zfp423は,白色と茶色の脂肪細胞の分化において重要な役割を果たします.
- この発見は,脂肪細胞の発達とエネルギーホメオスタシスを制御する分子経路の理解を前進させます.
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