暂时的化学介导表观遗传调制赋予人类原始化的多能干细胞不受限制的血统潜力
Shi Chen1, Yuanyuan He2, Lejun Lv3
1Department of Cell Biology, School of Basic Medical Sciences, Peking University Stem Cell Research Center, Peking University Health Science Center, Peking University, Beijing, 100191, China.
Science China. Life sciences
|January 17, 2025
概括
科学家们使用表观遗传调节器增强了人类干细胞的潜力. 这种治疗使得多能干细胞能够产生对胎盘发育至关重要的皮系,同时保持它们的胚胎潜力.
科学领域:
- 发展生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 人类原始多能干细胞 (PSC) 可以分化成所有胚胎血统.
- 然而,它们形成胚外 trofhectoderm (TE) 血统的潜力是有限的.
- 需要方法来扩大人类PSC中的TE潜力.
研究的目的:
- 调查过渡性表观遗传调制是否可以为人类原始化PSC赋予TE潜力.
- 描述由此产生的细胞,并了解潜在的表观遗传机制.
- 建立改善的胎盘发育体外模型.
主要方法:
- 用小分子表观遗传调节器尾酒治疗人类原始化PSC.
- 差异化测试用于评估血统潜力.
- 转录组 (RNA-seq) 和CUT&Tag分析以描述表观遗传修饰和基因表达.
- 涉及特定表观遗传修饰物的机制研究.
主要成果:
- 过渡性表观遗传调制成功地将TE血统潜力传递给人类原始化PSC,从而保留了胚胎潜力.
- 经过化学处理的细胞产生了象皮状细胞和象皮细胞干细胞,分化为同聚性象皮细胞和外性象皮细胞.
- 诱导细胞的转录和表观遗传特征在体内类似于TE和细胞原体,在特洛夫细胞特定位置减少H3K27me3.
- 鉴定出表观遗传修饰剂HDAC2,EZH1/2和KDM5s对于激活热原体潜能至关重要.
结论:
- 暂时的表观遗传重置可以在人类原始化PSC中释放不受限制的血统潜力.
- 这种方法为人类热囊细胞规范提供了新的机制性见解.
- 提供先进的体外模型来研究胎盘发育和相关疾病.
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