PFKM控制了整个骨肌肉分化过程中的代谢变化
Melissa Campos1, Steven T Nguyen2, Xiangduo Kong3
1Department of Developmental and Cell Biology, Charlie Dunlop School of Biological Sciences, University of California, Irvine, Irvine, CA, USA.
Nature metabolism
|February 24, 2026
概括
细胞代谢影响细胞的身份. 这项研究揭示了果酸酶1 (PFK1) 水平如何通过Wnt信号和溶酶体降解调节骨肌肉分化,影响葡萄糖代谢和细胞命运.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 代谢调节 代谢调节 代谢调节
背景情况:
- 代谢显著影响细胞的身份,但精确的机制尚未完全理解.
- 骨肌的分化是一个复杂的过程,涉及基因表达和代谢活动的协调变化.
研究的目的:
- 阐明果酸酶1 (PFK1) 是一种关键的糖解酶,在骨肌肉细胞命运决定中的作用.
- 在肌肉分化过程中研究PFKM的时空动力学和调节机制,PFK1的肌肉异型.
主要方法:
- 在肌肉干细胞和分化过程中分析PFKM表达水平.
- 研究Wnt信号诱导的降解途径,涉及蛋白质氨酸甲基转移酶1 (PRMT1) 和溶解体微自.
- 评估糖解和酸路径之间的代谢转移.
- 使用下游代谢物进行PFKM表达 (过度表达和淘汰) 的实验操纵和救援实验.
主要成果:
- PFKM表达在肌肉干细胞中较低,并在分化后增加.
- 通过甲基化氨酸降解动机和微自,Wnt信号触发了PFKM的快速溶酶体降解.
- PFKM的降解将葡萄糖代谢从糖解转向酸路径.
- 过度表达PFKM增强了糖解,并促进了终端分化成肌纤维.
- 通过PFKM的淘汰,差异化会受到损害,而3-糖酸盐补充剂可以部分挽救这种差异化.
结论:
- 分区代谢调节,特别是PFKM,对于骨肌肉细胞命运决定至关重要.
- 由Wnt信号控制的溶酶体降解途径在分化过程中调节细胞代谢起着关键作用.
- PFK1的活动直接影响葡萄糖代谢的平衡,并驱动终端肌肉分化.
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