在低氧条件下,FGF2支持NANOG表达,通过依赖于酸盐脱酶的基因素乙化,在低氧条件下支持NANOG表达
Petr Fojtík1,2,3, Martin Senfluk1, Katerina Holomkova1
1Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czechia.
Frontiers in cell and developmental biology
|November 13, 2025
概括
酸盐脱酶 (PDH) 作为一种代谢开关,控制人体多能干细胞 (hPSC) 中的基因组乙化和多能性. 这个过程受到氧气水平和信号通路的调节,影响干细胞应用.
科学领域:
- 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.
- 代谢调节 代谢调节 代谢调节
背景情况:
- 人类多能干细胞 (hPSCs) 需要精确控制多能性和细胞命运,以确保安全应用.
- 多能性与高素乙化和有氧糖解有关,而差异化涉及代谢转变.
- 酸盐脱酶 (PDH) 起着至关重要的作用,将酸盐转化为乙-CoA,这是基因素乙化的一个关键基质.
研究的目的:
- 调查PDH活性如何影响hPSC中的基因素乙化和多能性维护.
- 探索氧气水平和信号通路在调节PDH活动及其下游影响中的作用.
主要方法:
- 评估了使用乙-甲前体的PDH抑制和救援实验.
- 暴露在hPSCs不同FGF2信号和反应性氧物种 (ROS) 使用H2O2.2.
- 分析了蛋白质水平,基因表达,代谢物度和ROS水平.
主要成果:
- 在低氧 (5% O2) 条件下,活性PDH增强了素H3乙化和NANOG表达.
- 确定了一种依赖氧气的FGF2-MEK1/2-ERK1/2-ROS信号轴,通过氧化还原机制调节PDH活性.
- 在大气氧 (21% O2) 下没有观察到这种途径.
结论:
- PDH 作为一种对氧化还原敏感的代谢开关,将细胞代谢与多能性的表观遗传控制联系起来.
- 强调了氧张力,ROS和生长因子信号在hPSC代谢-表观遗传调节中的重要性.
- 这些发现对优化hPSC培养和差异化协议有意义.
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