OTX2控制着染色质的可访问性,以直接体相对生殖线分化
Elisa Barbieri1,2, Ian Chambers3,4
1Centre for Regenerative Medicine, Institute for Regeneration and Repair, 5 Little France Drive, Edinburgh, EH16 4UU, Scotland. Elisa.Barbieri@ed.ac.uk.
EMBO reports
|December 9, 2025
概括
转录因子OTX2控制着染色质的可访问性,以促进体细胞分化. OTX2通过在能够成为体细胞或生殖细胞的细胞中打开特定调节区域来增强体细胞命运.
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.
- 细胞命运的决定
背景情况:
- 胚胎表皮质细胞分化成体质或生殖系命运对于物种的生存至关重要.
- 转录因子OTX2在细胞命运决定中起着调节作用.
- 之前的研究表明,Otx2-null类表皮质细胞 (EpiLCs) 在形成原始生殖细胞类细胞 (PGCLCs) 中表现出更高的效率.
研究的目的:
- 阐明OTX2调节体和生殖细胞命运之间的选择的机制.
- 为了研究OTX2如何影响染色质可访问性直接细胞分化途径.
主要方法:
- 在野生型和Otx2-null胚胎干细胞和EpiLC中使用了CUT&RUN和ATAC-seq试验.
- 分析了OTX2结合部位及其对染色质可访问性的影响.
- 研究了强制OTX2表达在分化过程中对体相相关调节区域的影响.
主要成果:
- 发现OTX2结合能打开特定的染色质位点,促进体的分化.
- 强迫OTX2表达维持了染色质的可访问性,并诱导大约4000个体质相关区域的开放.
- 这些OTX2诱导的染色质可访问性的变化被观察到具有对体质和生殖系命运的双重能力的细胞中,并且一旦建立了生殖系身份,这些变化就不会持续下去.
结论:
- 在具有双重分化潜力的细胞中,OTX2的功能是增加细胞体调节区域的染色质可访问性.
- 这种OTX2的作用促进了体细胞命运的决定,而牺牲了生殖系的分化.
- 在调节染色质可访问性方面,OTX2的作用对于指导细胞发育早期命运决策至关重要.
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