细胞身份的转录程序和p53诱导的应激反应与空间基因组组织的独特特征有关
Gony Shanel1, Tsung-Han S Hsieh2, Claudia Cattoglio2,3
1Department of Human Molecular Genetics and Biochemistry, Gray Faculty of Medical & Health Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
Nucleic acids research
|July 8, 2025
概括
空间基因组组织在细胞身份和应激反应之间存在差异. 细胞类型特异性相互作用与基因表达相关,但压力诱导的变化没有,支持接触独立机制.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 3D基因组组织研究通常侧重于差异化或组织特异性差异.
- 在细胞应激反应期间调查基因组组织变化不太常见.
- 细胞应激与差异化相比,涉及的转录模拟不那么普遍.
研究的目的:
- 检查空间染色体组织和基因表达之间的关联在两个背景下:细胞身份和应激反应.
- 使用p53激活来建模应激反应.
- 要区分定义细胞身份的染色质相互作用与那些对应激反应的染色质相互作用.
主要方法:
- 在10个不同的细胞系中利用了微C,RNA测序和p53ChIP测序.
- 在p53诱导前后进行分析,以研究应激反应.
- 细胞类型之间的基因组组织和基因表达模式的比较以及在压力下细胞类型内的基因表达模式.
主要成果:
- 鉴定了细胞类型标记基因的基因表达和空间基因组组织之间的显著相关性.
- 发现了数百个与细胞身份相关的活跃增强剂-促进剂循环.
- 没有观察到基因表达变化和空间基因组组织之间的相关性,用于p53诱导的细胞类型内的应激反应.
结论:
- 证明了建立细胞身份的染色质相互作用和那些对细胞应激反应的染色质相互作用之间的根本差异.
- 结果支持TF活动梯度模型,用于在压力时增强剂-促进剂通信.
- 表明接触独立的机制可能会调解压力诱导的转录变化.
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