USP17L通过对H2AK119ub1和ZSCAN4进行二氧化化促进了类似于2细胞的程序
Panpan Shi1,2, Xukun Lu3,4,5,6,7, Kairang Jin1,2
1State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China.
Nature communications
|August 1, 2025
概括
USP17L基因家族,特别是USP17LE,通过二基因化H2AK119ub1来调节小鼠胚胎干细胞中的2C类状态,从而促进对囊基因组激活的关键基因表达.
科学领域:
- 发展生物学 发展生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 干细胞生物学 干细胞生物学
背景情况:
- 紫毒基因组激活 (ZGA) 对于小鼠的胚胎发育至关重要,在双细胞 (2C) 胚胎中,小ZGA先于大ZGA.
- ZGA基因的一个子集,称为2C基因,也表达在一种罕见的小鼠胚胎干细胞 (mESCs) 群体中,称为2C类细胞.
- 这些2C基因在调节2C类状态方面的精确功能仍然不完全理解.
研究的目的:
- 调查Usp17l基因家族,一种已知的2C基因在调节mESCs中的2C类状态中的作用.
- 阐明USP17L家族成员影响关键发育基因和表观遗传标记表达的分子机制.
主要方法:
- 在mESCs中分析Usp17l基因家族功能.
- 调查USP17LE对基因素H2AK119ub1.1.的双化活性.
- 评估Usp17le过度表达对Dux,2C基因,逆转移子和ZSCAN4表达的影响.
- 在小鼠植入前胚胎中检查Dux表达和H2AK119ub1水平.
主要成果:
- 作为USP17l家族成员的USP17LE,二基因素H2AK119ub1,这是与基因抑制相关的标记.
- USP17LE促进了Dux,下游2C基因和逆转移体的表达,这对2C类状态至关重要.
- 此外,USP17LE还能使ZSCAN4脱和稳定,这是早期胚胎发育的另一个关键因素.
- 在mESC中Usp17le的过度表达导致H2AK119ub1水平降低,并增强Dux和2C基因的激活.
结论:
- Usp17l基因家族,特别是USP17LE,在调节mESCs2C类状态的转录和后翻译格局方面发挥着关键作用.
- USP17L通过调节H2AK119ub1水平而起作用,从而影响Dux和ZSCAN4等关键发育调节者的表达.
- USP17L被确定为早期胚胎发育必不可少的2C基因程序的潜在关键调节者.
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