骨质母细胞中FOXC1的调节和功能
Sarocha Suthon1, Jianjian Lin1, Rachel S Perkins1
1Department of Orthopaedic Surgery and Biomedical Engineering, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
Journal of developmental biology
|September 27, 2023
概括
雌激素受体α (ERα) 信号通过控制FOXC1表达来调节骨密度. GATA4和FOXC1转录因子相互作用,影响骨质母细胞分化和骨形成.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 骨生物学 骨生物学 骨生物学
背景情况:
- 雌激素对于维持骨矿物质密度至关重要.
- 更年期引起的雌激素下降导致骨质降低和骨折风险增加.
- 在骨质细胞中,雌激素受体α (ERα) 的结合位点在FOXC1基因附近被丰富.
研究的目的:
- 研究ERα,FOXC1和GATA4在骨质细胞分化中的作用.
- 阐明调节雌激素对FOXC1表达的分子机制.
- 了解GATA4和FOXC1在骨形成中的合作相互作用.
主要方法:
- 主要小鼠和人类骨质母细胞培养物.
- 定量实时PCR和西式斑点测量基因和蛋白质表达.
- 染色体免疫沉 (ChIP-reChIP) 和光酶测定用于评估蛋白质相互作用和转录调节.
- 在体外和体外的GATA4淘汰模式.
主要成果:
- 17β-雌二醇 (E2) 治疗增加了骨质母细胞中的FOXC1 mRNA和蛋白质水平.
- GATA4被招募到Foxc1基因附近的增强剂中,其淘汰/淘汰减少了Foxc1的表达.
- GATA4和FOXC1在物理上相互作用,并共同调节骨质母细胞分化基因,包括RUNX2.
- 在GATA4绑定站点中,FOXC1图案被高度丰富,表明了合作调节.
结论:
- 通过ERα传递雌激素信号,直接上调骨质母细胞中的FOXC1表达.
- 先驱因子GATA4在调解ERα对FOXC1.1的影响方面发挥着关键作用.
- GATA4和FOXC1形成一个调节综合体,对骨质母细胞分化和骨形成至关重要.
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