巨细胞的AMPKα1缺乏会通过TNF-α-FBP2信号破坏肌再生和肌干细胞功能
Lisha Zhu1,2,3,4, Yu Wang2,3, Xinmeng Shi2,3
1Central Laboratory, Peking University School and Hospital of Stomatology, Beijing 100081, China.
International journal of biological sciences
|February 16, 2026
概括
巨细胞AMP激活蛋白激酶 (AMPK) α1对于肌愈合至关重要. 其缺乏会通过TNF-α-FBP2通路损害干细胞功能和肌修复,突出FBP2的作用.
科学领域:
- 生物医学工程 生物医学工程
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
背景情况:
- 肌愈合受到再生不良的限制,往往导致痕组织.
- 巨细胞免疫代谢在肌修复中的作用尚不清楚.
- 了解巨细胞激活是改善肌再生的关键.
研究的目的:
- 在肌损伤中调查巨细胞AMP激活蛋白激酶 (AMPK) 激活.
- 确定巨细胞AMPKα1对肌干细胞/原生细胞 (TSPCs) 的影响.
- 阐明将巨细胞AMPKα1与肌修复联系起来的分子机制.
主要方法:
- 使用了骨髓细胞特异性AMPKα1淘汰小鼠 (LysM-Cre; Ampkα1fl/fl).
- 在新生儿和成人受伤模型中评估肌再生和修复能力.
- 分析了巨细胞的表型,TSPC的功能和分子信号通路 (TNF-α,FBP2,PI3K/AKT).
主要成果:
- 巨细胞AMPKα1的缺陷显著损害了肌的再生和修复.
- 缺乏AMPKα1会影响TSPCs的增殖,迁移和分化.
- 缺乏AMPKα1的巨细胞显示TNF-α的产生增加,通过PI3K/AKT信号传递调节FBP2.
- FBP2调节了线粒体生物发生和动力学,促进了组织修复.
结论:
- 巨细胞AMPKα1活动对于有效的肌愈合至关重要.
- 一个新的TNF-α-FBP2轴将巨细胞免疫代谢与肌损伤中的干细胞反应联系起来.
- 果糖二酸酶2 (FBP2) 在干细胞功能和组织再生中起着调节作用.
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