在小鼠胚胎干细胞中,Lrif1调节了Trim28介导的Dux位点的抑制
bioRxiv : the preprint server for biology
|November 28, 2024
概括
面骨肌缩症2型 (FSHD2) 涉及表观遗传变化. 通过与TRIM28相互作用,LRIF1蛋白有助于抑制DUX4 (与FSHD2相关的基因),保持肌肉健康.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 2型面骨肌缩症 (FSHD2) 是一种表观遗传性疾病.
- 在SMCHD1,DNMT3B和LRIF1中的突变导致FSHD2.2.
- FSHD2涉及D4Z4重复异染色化失败和DUX4基因表达.
研究的目的:
- 在染色体组织中阐明SMCHD1,DNMT3B和LRIF1之间的功能关系.
- 研究LRIF1在调节小鼠DUX4同类DUX中的作用.
主要方法:
- 在小鼠胚胎干细胞 (mESCs) 中抑制LRIF1.
- 评估了DUX转录程序的升级调节.
- 研究了LRIF1与TRIM28的相互作用以及TRIM28在DUX位点的占用率.
主要成果:
- 而LRIF1 knockdown,而不是SMCHD1或DNMT3B,对mESC中的DUX转录程序进行了适度的调节.
- LRIF1与DUX抑制器TRIM28.8.1进行相互作用.
- LRIF1的淘汰降低了DUX地点的TRIM28占用率.
结论:
- 在老鼠和人类中,LRIF1在抑制早期胚胎基因组激活器 (包括DUX) 中起着保留作用.
- 研究结果表明,与FSHD2.2相关的表观遗传调节中存在LRIF1的机制.
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