WDR5重塑NANOG凝聚剂以驱动转录程序并维持干细胞身份
Duo Wang1,2, Xianle Shi3, Jiaying Xie1,4
1State Key Laboratory of Systems Medicine for Cancer, Shanghai Cancer Institute, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Nature communications
|January 21, 2026
概括
研究人员发现,WDR5蛋白与NANOG蛋白的相互作用对于维持干细胞多能性至关重要. 这种相互作用调节基因激活,并影响胚胎干细胞身份和白血病干细胞生长.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 干细胞生物学 干细胞生物学
背景情况:
- 干细胞多能性是通过转录因子和表观遗传调节者之间的复杂相互作用来维持的.
- NANOG是多能性的关键转录因子,而WDR5是关键的染色体调节剂.
研究的目的:
- 调查NANOG和WDR5.5之间的直接相互作用.
- 阐明这种相互作用在调节干细胞身份和基因表达中的作用.
- 探索针对WDR5-NANOG相互作用的治疗潜力.
主要方法:
- 确定NANOG和WDR5.5之间的直接蛋白质与蛋白质相互作用.
- 结构分析以确定交互界面.
- 评估NANOG凝聚物形成和染色质占用率.
- 在体内研究使用药理抑制在白血病干细胞.
主要成果:
- WDR5与NANOG直接相互作用,将其聚合物重塑为目标基因促进器的动态凝聚物.
- NANOG R153A突变破坏了WDR5的相互作用,损害了凝结物形成,染色体结合和活性基因素标记.
- 在体内抑制WDR5-NANOG相互作用抑制了白血病干细胞扩张.
结论:
- 通过WDR5调节NANOG凝聚体动力学对于转录控制干细胞身份至关重要.
- WDR5-NANOG相互作用代表了潜在的治疗点,用于涉及干细胞功能障碍的疾病,如白血病.
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