单核酸分辨率 经转录形状分析揭示了动态 m6 在牛植入前发展中的规则
Rajan Iyyappan1, Yichi Niu2, Ming Hao1
1Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, 32610, USA.
bioRxiv : the preprint server for biology
|July 17, 2025
概括
RNA N6 - 甲基氨酸 (m6A) 对于早期胚胎发育至关重要. 这项研究揭示了RPL12上一个特定的m6位点,该位点对牛胚胎发育至关重要,影响转化和基因表达.
科学领域:
- 表观遗传学和发育生物学
- 哺乳动物胚胎发生
- 基因组RNA的修改 基因组RNA的修改
背景情况:
- RNA N6 - - 甲基氨酸 (m6A) 是基因表达的关键表观遗传调节器.
- 在早期哺乳动物发育中的动态和功能作用尚未完全理解.
- 之前的研究缺乏m6A在植入前发育过程中的单核酸分辨率.
研究的目的:
- 以单核酸分辨率绘制牛卵细胞和植入前胚胎的全面地图.
- 为了确定新的m6A修改对于早期胚胎发育至关重要.
- 在关键的发育调节器中阐明特定站点m6A的功能意义.
主要方法:
- 利用SAC-seq,一个单基分辨率,抗体独立的m6一个分析技术.
- 产生了第一个全面的m6牛卵细胞和植入前胚胎的景观.
- 研究了m6A修饰干扰对胚胎发育的功能影响.
主要成果:
- 确定了RPL12转录中一个以前未经表征的m6A位点,该位点对胚胎发育至关重要.
- 证明在这个部位失去m6A减少了蛋白质合成,并破坏了与翻译相关的基因表达.
- 在m6A中断时观察到受损的阴茎基因组激活和胚胎细胞形成.
- 表明野生类型的RPL12mRNA补充不能挽救发育停滞,突出显示了超出转录水平的m6A的作用.
结论:
- 提供了有价值的单核酸分辨率 m6 哺乳动物胚胎发生的景观资源.
- 揭示了一个关键机制,即特定于某个部位的m6A调节了早期胚胎的翻译和发育能力.
- 表明m6在早期发育过程中,对精确控制蛋白质合成至关重要的一种修改.
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