天真多能性的退出包含一个代谢诱导的对端粒恒常的检查点
Roshni A de Souza1, David Barneda1, Donja Karimlou1
1Department of Metabolism, Digestion, and Reproduction, Institute of Reproductive and Developmental Biology, Faculty of Medicine, Imperial College London, London W12 0NN, UK.
Cell reports
|December 12, 2025
概括
一个新的端粒长度检查点将代谢变化与早期胚胎发育期间的基因组完整性联系起来. 代谢变化引发端粒缩短,激活ZSCAN4进行保护并确保端粒恒温.
科学领域:
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
- 细胞的新陈代谢
背景情况:
- 早期胚胎发育涉及多能组织的显著细胞和生化重编程.
- 在这些关键的转变过程中保持基因组完整性是必不可少的,但人们对其了解甚少.
- 在多能性转换期间代谢转变和基因组稳定性之间的协调需要进一步研究.
研究的目的:
- 揭示了机制协调基因组完整性与代谢重塑在过渡期间从天真到形成性的多能性.
- 在早期发育过程中,确定将新陈代谢状态与端粒平衡联系起来的调节途径.
主要方法:
- 利用小鼠胚胎干细胞 (ESC) 来建模从天真到形成性多能性的过渡.
- 分析了包括线粒体呼吸和de novo脂质生成在内的代谢变化.
- 评估了端粒长度动态和ZSCAN4.4的作用.
主要成果:
- 从天真的多能性退出与线粒体呼吸和脂质生成的增加有关,导致脂质滴积累.
- 这些代谢变化会诱导短暂的端粒缩短.
- ZSCAN4是一种多能性调节剂,由端粒应激激活,随后促进端粒重新延长,因为细胞转向糖解代谢.
结论:
- 一个端粒长度检查点是通过代谢重塑在天真到形成性的多能性过渡期间被激活.
- 代谢诱导的端粒应激会使ZSCAN4作为一种保护机制.
- 这项研究揭示了一种反循环,将新陈代谢状态与端粒平衡联系起来,这对早期胚胎发育至关重要.
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