全基因组沉声器查揭示了关键沉声器调节重编程效率在老鼠诱导的多能干细胞的干细胞
Xiusheng Zhu1, Lei Huang1, Guoli Li1
1Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 20, 2025
概括
研究人员在老鼠基因组中发现了数千种新型基因沉默器. 这些对基因抑制至关重要的调节元素是细胞特异的,影响细胞重编程和多能性.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因规则 基因规则
背景情况:
- 小鼠基因组的非编码区域包含调节序列.
- 激活基因表达的增强剂得到了充分的研究,但基因沉默剂的探索较少.
研究的目的:
- 首次在小鼠基因组中进行全基因组范围的沉声器识别.
- 描述这些沉声器的基因组分布,相关基因和功能性质.
主要方法:
- 在小鼠胚胎纤维细胞 (MEFs) 和胚胎干细胞 (mESCs) 中全基因组识别沉声器.
- 静音器分布的分析,与基因表达水平的关联,以及转录因子 (TF) 的结合.
- 研究与静音器相关的基因组修饰 (H3K9me3) 和表观遗传变化的研究.
主要成果:
- 在MEF中识别了89,596个沉声器,在mESC中确定了115,165个沉声器.
- 沉声剂分布无处不在,与低表达基因相关,并且细胞特异.
- 沉声器结合压制性TF,为H3K9me3进行丰富,并且可以根据TF水平切换到增强器功能.
- 沉声器会影响MEF的诱导效率和mESC的多能性.
结论:
- 这项研究介绍了鼠标基因组中第一个全面的沉声器景观.
- 沉声器在调节基因表达和细胞过程中发挥着重要作用,例如重编程和多能性.
- 已识别的沉声器提供了对基因调节和诱导多能干细胞 (iPSCs) 的发展的洞察.
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