H2AK119ub 动态控制 毛囊干细胞静止
Pooja Flora1,2, Meng Yen Li1, Yudong Zhou1,3
1Department of Stem Cell Biology and Regenerative Medicine, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Nature communications
|December 18, 2025
概括
基因素标记H2AK119ub作为一个分子开关,由纤维细胞生长因子 (FGF) 信号控制,以维持干细胞 (SC) 静止. 这种标记的丢失会导致关节筋疲劳和组织衰老.
科学领域:
- 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
- 分子生物学分子生物学
背景情况:
- 成人干细胞 (SCs) 必须平衡静止和激活,以实现组织平衡.
- 失调的SC状态与衰老,癌症和退行有关.
- 将外部信号与SC内在程序集成的分子机制尚不清楚.
研究的目的:
- 阐明控制干细胞静止的分子机制.
- 为了确定连接外部信号与SC命运的表观遗传调节者.
- 研究H2AK119ub在毛囊干细胞 (HFSC) 中的作用.
主要方法:
- 在HFSC中分析基因组修饰的分析.
- 调节纤维细胞生长因子 (FGF) 信号通路.
- 评估干细胞激活和静止状态.
- 跨不同干细胞系统的比较分析.
主要成果:
- H2AK119ub作为一个分子开关,将抑制FGF信号与HFSC中静止的转录程序联系起来.
- FGF信号调制改变了H2AK119ub水平,控制了HFSC静止和激活.
- H2AK119ub直接抑制了繁殖基因,维持了HFSC的静止状态.
- 失去H2AK119ub会导致静止时间缩短,反复激活和SC疲劳.
- H2AK119ub是各种干细胞类型中静止的保存标志.
结论:
- 一个涉及H2AK119ub和FGF的信号-表观遗传轴控制着SC静止.
- H2AK119ub对于维持组织平衡和防止过早衰老至关重要.
- 这种保存机制突显了H2AK119ub在干细胞调节中的基本作用.
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