作为能量代谢调节器的细胞外基质刚性驱动介质干细胞的骨质分化
Jing Na1, Zhijie Yang1, Qiusheng Shi1
1Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China.
Bioactive materials
|March 4, 2024
概括
刚性生物材料通过增强能量代谢和线粒体功能来促进干细胞分化. 这项研究强调了YES相关蛋白 (YAP) 在整合机械线索和代谢信号的作用,用于骨组织工程.
科学领域:
- 生物材料科学 生物材料科学
- 干细胞生物学 干细胞生物学
- 机械生物学 机械生物学
背景情况:
- 生物材料的刚性会影响干细胞的分化,而能量代谢在血统的承诺中起着关键作用.
- 在调节干细胞命运方面,细胞外矩阵 (ECM) 刚性和能量代谢之间的相互作用仍然不完全理解.
研究的目的:
- 研究细胞外矩阵 (ECM) 刚性如何调节能量代谢和随后的干细胞分化.
- 阐明YES相关蛋白 (YAP) 在这个过程中作为机械传感器的作用.
主要方法:
- 在不同硬度的基板上培养的介质干细胞 (MSCs).
- 细胞能量代谢的分析,包括糖解和氧化酸化.
- 评估线粒体动力学和抗氧化剂防御系统.
- 对YES相关蛋白 (YAP) 信号通路的研究.
主要成果:
- 刚性ECM在MSCs的骨质分化过程中显著促进糖解,氧化酸化和抗氧化剂防御.
- 在硬基质上观察到线粒体融合的增加,由增强的线粒素1和2表达和抑制的胺相关蛋白1活性介导.
- 鉴定出YAP是葡萄糖分解,谷氨酸代谢,线粒体动力学和生物合成的关键调节者,是对ECM刚性的反应.
- 发现甘油分解通过细胞骨张力诱导的核变形来调节YAP活动.
结论:
- YAP充当一个关键的机械传感器,将ECM机械信号与细胞能量代谢相结合,将MSC的命运指向骨质生成.
- 通过考虑机械特性和代谢调节,研究结果为设计改善的骨组织工程支架提供了宝贵的见解.
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