在衰老过程中,HIF-1α通路通过质母乳化调节卫星细胞命运
Marco Piccoli1,2,3, Lorenzo Mornatti1,3, Ivana Lavota1,3
1Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Milan, Italy.
Aging cell
|February 14, 2026
概括
用roxadustat重新激活缺氧诱导因子-1α (HIF-1α) 会使老化的肌肉干细胞复原. 这种方法通过增强细胞代谢和促进卫星细胞的再生状态来逆转萨尔科佩尼亚.
科学领域:
- 细胞生物学 细胞生物学
- 肌肉生理学 肌肉生理学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 与衰老相关的肉症涉及肌肉纤维的损失和卫星细胞 (SC) 功能障碍.
- 缺氧诱导因子-1α (HIF-1α) 信号随着年龄的增长而下降,导致这些缺陷.
研究的目的:
- 调查HIF-1α的药理活性化是否可以使老年SCs恢复青春,并改善肉症.
- 阐明将HIF-1α,新陈代谢和SC功能联系在一起的分子机制.
主要方法:
- 老鼠前肌的SCs被用roxadustat治疗以重新激活HIF-1α.
- 分析包括基因表达,细胞内的乳酸盐水平,组织素乳化,细胞增殖,衰老标志物和分化能力.
- 评估了像IGF-1/PI3K-Akt-mTOR这样的关键信号通路.
主要成果:
- 罗克萨杜沙特治疗恢复了HIF-1α信号传递,增加了糖解酶和乳酸,并增强了基因素乳酸化.
- HIF-1α激活将老年SCs从衰老转移到静止,再生状态,减少p16Ink4a并增加Pax7.7.
- 预处理的SCs表现出更好的分化成具有更高ATP含量和激活肌源性通路的过度缩性髓管.
结论:
- 一个HIF-1α-乳酸盐-乳化轴使老化的卫星细胞恢复青春.
- 药理学HIF-1α重新激活有望通过提高肌性能的性能来治疗缩症.
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