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在猪胚胎干细胞中,PIAS4调节多能性退出和细胞命运承诺

Wei Qin^1,2, Yu Wang^1,2, Hongfei Duan^1,2

¹Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China.

Fundamental research

|August 8, 2025

概括

激活STAT4 (PIAS4) 的蛋白抑制剂对于胚胎干细胞分化至关重要. 削弱PIAS4通过调节基因促进剂和与猪胚胎干细胞中的KDM5B相互作用,损害多能性退出.

科学领域:

细胞生物学细胞生物学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
发展生物学发展生物学

背景情况:

翻译后修饰 (PTMs) 动态调节细胞状态和蛋白质组多样性.
猪胚胎干细胞 (pESCs) 在多能性退出中PTMs的作用尚不清楚.

研究的目的:

系统地识别参与pESC中的多能性退出的E3泛素酶.
阐明PIAS4在pESC分化中的调控机制.

主要方法:

在CRISPR/Cas9组合选中,可以识别E3无素连接酶.
对PIAS4基因组占有率和与KDM5B的相互作用进行分析.
对H3K4me3修饰和SUMOylation的研究.

主要成果:

PIAS4被确定为多能性退出的关键调节剂,其耗尽显著损害了pESC分化.
PIAS4占据了多能性维护基因的促进器区域,并被招募到H3K4me3标记的促进器中.
通过SUMOylation,PIAS4与KDM5B相互作用,影响KDM5B的稳定性和H3K4me3介导的基因调节.

结论:

PIAS4通过与KDM5B的相互作用来调节发育基因上的H3K4me3修饰.
这种机制影响pESC中的多能性退出和细胞命运承诺.
在胚胎干细胞分化过程中,PIAS4在调节基因表达方面发挥着关键作用.

关键词:

通过CRISPR查进行查.在 PIAS4 中.多能性出口的出口.转录后的修改是转录后的修改.乌比基因结合酶的使用.猪的扩展潜力干细胞

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