复杂的调节网络影响人类iPSC中的多能细胞状态过渡
Timothy D Arthur1,2, Jennifer P Nguyen2,3, Agnieszka D'Antonio-Chronowska4
1Biomedical Sciences Graduate Program, University of California, San Diego, La Jolla, CA, 92093, USA.
人类诱导多能干细胞 (hiPSCs) 由于复杂的基因调控网络,显示出不同的多能状态. 遗传因素影响这些细胞状态过渡,影响多能性调节.
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:
- 人类诱导的多能干细胞 (hiPSCs) 在体外存在着不同的,可相互转换的多能状态.
- 这些状态的比例在不同的hiPSC线上有很大的不同.
研究的目的:
- 调查基因和调控网络模块的基因和调控网络模块,这些模块是 hiPSCs 中多能性的基础.
- 探索遗传变异和表观遗传复杂性在调节hiPSC状态中的作用.
主要方法:
- 对来自不同个体的数百条hiPSC线的分析.
- 基因网络模块 (GNM) 和监管网络模块 (RNM) 的识别.
- 表观遗传和遗传分析,包括染色质可访问性和监管变异识别.
主要成果:
- 发现了13个高度相关的GNM和13个RNM,表明了协调的基因表达和调控元素的可访问性.
- 揭示了管理自我更新和多能性的监管网络比以前理解的更为复杂.
- 确定了与染色质可访问性相关的数千种调节变异,在NANOG-OCT4复杂网络中显著丰富.
结论:
- 多能和自我更新涉及复杂的监管网络.
- 遗传因素,特别是影响NANOG-OCT4复合体等关键调节者的变异,有助于hiPSC线内的多能状态的变异.
- 这些发现表明基因对hiPSCs细胞状态转换的贡献.
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