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转位元MERVL通过TET3调节氧化受损的小鼠植入前胚胎中的DNA脱甲基化

Lihong Liu¹, Siyao Ha², Dan Cao¹

¹Reproductive Center, The First Affiliated Hospital of Shantou University Medical College, Shantou University, Shantou, 515041, China.

Molecular medicine (Cambridge, Mass.)

|March 13, 2025

概括

可移植的MERVL元素对于早期胚胎发育和DNA甲基化重编程至关重要. 它的缺失会导致DNA损伤和亡,阻碍胚胎细胞的发育.

科学领域:

基因组学就是基因组学.
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.

背景情况:

可转移元素 (TE) 在真核基因组中丰富,影响基因组可塑性.
MERVL,一种特定的TE,在2细胞阶段表达,并与胚胎全能性有关.
在早期胚胎发育中MERVL的确切功能尚不清楚.

研究的目的:

研究MERVL在胚胎早期发育中的作用及其与氧化应激的潜在联系.
探索MERVL对胚胎发生过程中DNA甲基化重编程的影响.

主要方法:

使用DRUG-seq评估在氧化应激 (H2O2) 条件下的基因和TE表达.
反感性寡核酸 (ASO) 用于在早期胚胎中击败MERVL表达.
在MERVL-knockdown胚胎中分析了DNA损伤,亡和DNA甲基化水平.

主要成果:

由H2O2诱导的氧化损伤导致DNA损伤,亡和不完全的DNA脱甲基化,可能与MERVL.相关.
MERVL的淘汰导致了早期的DNA损伤和二细胞阶段的亡,损害了胚胎细胞形成.
缺乏MERVL抑制了十-十一转位3 (TET3) 活性,导致DNA脱甲基化受损.

结论:

在维持胚胎发育和预防DNA损伤和亡方面,MERVL起着至关重要的作用.
MERVL对于适当的胚胎DNA甲基化重编程至关重要,特别是通过调节TET3活性.
这项研究为MERVL在胚胎发生和表观遗传学中的功能提供了基础的见解.

关键词:

通过DNA甲基化.梅尔维尔 (MERVEL) 是一个氧化作用的损伤.在TET3的基础上.

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