272-OTX2调控人类早期胚胎基因组激活和发育 episode artwork

EPISODE · Nov 27, 2025 · 17 MIN

272-OTX2调控人类早期胚胎基因组激活和发育

from 聊聊Sci

这篇研究文章重点介绍母源因子OTX2在调控人类胚胎基因组激活(EGA)和早期发育中的关键作用。研究人员通过敲低OTX2蛋白,发现它对于四细胞阶段的EGA和随后的早期发育至关重要,因为OTX2促进了关键EGA基因(如TPRX1和TPRX2)和重复元件的激活。通过进行CUT&RUN和ATAC-seq等实验,该研究直接证明了OTX2结合在EGA基因的调控元件上,并增强了染色质的可及性,特别是富含OTX2基序的Alu和MaLR重复元件。此外,研究还发现OTX2的功能可能与另一个母源转录因子TPRXL存在冗余,因为联合敲低OTX2和TPRXL会加剧八细胞阶段EGA和染色质可及性的缺陷。最终,这些发现确立了OTX2作为启动人类生命首次转录事件的关键母源转录因子,并揭示了EGA调控的层次结构和进化意义。References: Wang Q, Zhang C, Dang Y, et al. Maternal factor OTX2 regulates human embryonic genome activation and early development[J]. Nature Genetics, 2025: 1-13.前往小宇宙评论区与主播互动

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272-OTX2调控人类早期胚胎基因组激活和发育

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