药理 HIF-PH 抑制通过持续的 HIF-1α 稳定抑制肌细胞分化
Yuya Miki1, Akinobu Ochi1, Hideki Uedono1
1Department of Metabolism, Endocrinology and Molecular Medicine, Osaka Metropolitan University Graduate School of Medicine, Osaka 545-8585, Japan.
International journal of molecular sciences
|June 13, 2025
概括
缺氧诱导因子酸酶 (HIF-PH) 抑制剂稳定缺氧诱导因子-1α (HIF-1α),但可以抑制骨肌肉的分化. 这项研究表明,持续的HIF-1α稳定在体外和体内抑制肌细胞分化.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 生理学 生理学 生理学
背景情况:
- 催氧诱导因子基酶 (HIF-PH) 抑制剂稳定催氧诱导因子-1α (HIF-1α).
- 这些抑制剂在临床上用于治疗贫血.
- 持续的HIF-1α稳定对骨肌肉分化的影响尚不清楚.
研究的目的:
- 研究连续HIF-1α稳定对骨肌肉分化的影响.
- 检查HIF-PH抑制剂在肌细胞分化中的作用.
- 阐明HIF-1α对肌肉发育影响的分子机制.
主要方法:
- 试验室内:培养小鼠C2C12核细胞,并诱导它们与FG-4592 (一种HIF-PH抑制剂) 或不使用FG-4592进行分化.
- 在体内:九周大的雄性C57BL/6小鼠被用FG-4592或载体治疗了四周.
- 分子分析包括MyoD,myogenin,myosin重链 (MHC) 和myostatin的基因和蛋白质表达;HIF-1α敲击也进行了.
主要成果:
- 在FG-4592治疗过程中,HIF-1α在体外持续稳定.
- 在体外,FG-4592抑制了C2C12肌细胞分化,降低了MyoD和肌原蛋白表达,降低了MHC,并增加了肌.
- HIF-1α的淘汰部分地挽救了MHC表达的下降. 在体内,FG-4592增加了HIF-1α,并降低了胃肌中的MyoD,myogenin和MHC.
结论:
- 药理上的HIF-PH抑制抑制了肌细胞分化.
- 持续的HIF-1α稳定是这种抑制的关键机制.
- 这些发现突显了HIF-PH抑制剂对骨肌肉健康的潜在副作用.
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