自调节了通过MAP1LC3B介导的母性mRNA衰变来调节母性到卵巢的过渡
Doudou Liu1, Shimeng Guo1, Jing Hu1
1Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Chongqing Health Center for Women and Children, Women and Children's Hospital of Chongqing Medical University, Chongqing, China.
Autophagy
|November 13, 2025
概括
微管相关蛋白1轻链3β (LC3B) 通过一种自依赖的途径调解母体mRNA衰变,这对于哺乳动物胚胎发育和胚胎基因组激活 (ZGA) 至关重要. 这一过程对于防止发育停滞至关重要.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 孕产妇的mRNA清除在孕产妇转化为胚胎发育的过程中至关重要.
- 自在母体mRNA清除中的作用以及与自相关的蛋白质MAP1LC3B/LC3B在这个过程中的功能尚未得到充分理解.
研究的目的:
- 调查MAP1LC3B/LC3B在MZT期间母亲mRNA降解中的作用.
- 阐明LC3B介导的母体mRNA清除的机制及其对胚胎发育的影响.
主要方法:
- 综合性分析包括RNA-免疫沉降测序 (RIP-seq),RNA测序 (RNA-seq) 和早期胚胎中的CUT&Tag.
- 击败LC3B和抑制自.
- 对母体mRNA清除动力学和胚胎基因组激活 (ZGA) 的分析.
主要成果:
- 确定LC3B是一种对mRNA降解至关重要的母性mRNA结合蛋白,比BTG4-CCR4-NOT通路更快地起作用.
- 抑制LC3B淘汰或自抑制延迟了母亲的mRNA清除,损害了ZGA,并导致发育停止.
- 母亲的Suv39h2被确定为一个关键的LC3B基因,其异常持久性与发育失败有关.
结论:
- 通过LC3B介导的母体mRNA清除的新型自依赖途径被揭示出来.
- 在调节母体mRNA衰变方面,LC3B起着至关重要的作用,影响ZGA和胚胎发育.
- 这些发现为哺乳动物MZT期间的母乳mRNA周转提供了新的机制性见解.
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