外部信号通路与胚胎干细胞中核心转录网络的整合
1Gene Regulation Laboratory, Genome Institute of Singapore, Singapore 138672.
Cell
|June 17, 2008
概括
这项研究绘制了胚胎干细胞中转录因子结合部位的地图,以了解基因调节. 综合映射揭示了定义干细胞身份的监管网络的关键特征.
科学领域:
- 干细胞生物学 干细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因组学就是基因组学.
背景情况:
- 转录因子 (TFs) 编排基因表达程序.
- 了解转录性调节网络对于干细胞生物学至关重要.
- 研究了涉及LIF/BMP信号,自我更新和重编程的关键因素.
研究的目的:
- 在胚胎干细胞 (ES) 中绘制13个序列特异性TF和2个转录调节者的基因组位置.
- 为了深入了解管理ES细胞身份的转录性调节网络.
- 了解信号通路在ES细胞特异性转录中的整合.
主要方法:
- 染色体免疫沉与超高通量DNA测序 (ChIP-seq) 相结合.
- 对Nanog,Oct4,STAT3,Smad1,Sox2,Zfx,c-Myc,n-Myc,Klf4,Esrrb,Tcfcp2l1,E2f1,CTCF,p300和Suz12的结合位点进行映射,这些结合位点包括:
主要成果:
- 在ES细胞中生成的TF结合位点的全面地图.
- 确定由多个TF广泛共同准的特定基因组区域.
- 洞察ES细胞转录中的信号通路的整合.
结论:
- 这项研究为了解ES细胞转录调节提供了全面的资源.
- 识别的TF绑定模式突出了定义ES细胞身份的监管网络的关键特征.
- 这项工作促进了我们对干细胞多能性和分化背后的分子机制的理解.
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