朱德编排了cis-调控元件的动态,以促进内皮细胞向血液构造细胞的过渡
Jiani Guo1, Mengyao Liu1, Feng Liu2
1State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China.
概括
转录因子 (TFs) 和 cis调节元件 (CREs) 控制细胞命运. 这项研究揭示了AP-1和Hoxa9a TFs如何协作调节斑马鱼的内皮转化为血液生成转变 (EHT).
科学领域:
- 发育生物学是发展生物学.
- 遗传学 遗传学 是一个
- 细胞生物学 细胞生物学
背景情况:
- 细胞命运的决定依赖于通过 cis 调节元件 (CREs) 和转录因子 (TFs) 精确的基因调节.
- 内皮细胞转化为造血细胞 (EHT) 是一个关键的过程,其中内皮细胞发展为造血细胞干细胞和祖细胞,但调节机制尚未完全理解.
研究的目的:
- 调查斑马鱼EHT期间CRE激活和TF结合的动态.
- 阐明在编排细胞命运过渡过程中无处不在和特定于血统的TFs的作用.
主要方法:
- 在斑马鱼EHT期间CRE动态和TF占用率的表征.
- 对TF删除对造血细胞特异性的功能影响的分析.
- 在特定的增强剂中研究TF介导的基因组修饰 (H3K27ac) 调节.
主要成果:
- 增强者-促进者合作对EHT至关重要.
- 无处不在的TF AP-1与特定的TF合作,修改增强器格局.
- 删除Jund,一个AP-1家族成员,通过在血源性内皮细胞 (HECs) 中保持内皮细胞的身份来破坏造血细胞的特异性.
- 朱德和Hoxa9a通过H3K27ac修饰合作抑制内皮基因*dll4*增强剂的活性.
结论:
- 无处不在和细胞类型特定的TFs之间的合作相互作用对于调节细胞命运过渡,如EHT至关重要.
- 了解这些调节网络可以了解发育过程和潜在的治疗点.
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