在心肌细胞中调节线粒体动态的无异型微/纳米拓学
Yan Liu1,2, Bingcheng Yi3, Liangliang Yang4
1Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao 266021, People's Republic of China.
Research (Washington, D.C.)
|September 18, 2025
概括
生物材料表面地形学影响心肌细胞线粒体. 特定的微/纳米纹表面破坏线粒体平衡和能量代谢,为心血管疾病治疗提供了洞察力.
科学领域:
- 生物材料科学 生物材料科学
- 细胞生物学 细胞生物学
- 心血管研究研究心血管研究
背景情况:
- 生物材料支架上的地形线索通过整合素结合和机械传导影响细胞行为.
- 地形线索对有机体行为,特别是心肌细胞中的线粒体的影响还不太清楚.
研究的目的:
- 研究不同波长和振幅的面向微/纳米纹表面对心肌细胞线粒体功能的影响.
- 阐明地形学对线粒体动力学和恒温的基础影响的机制.
主要方法:
- 使用了在微/纳米纹表面培养的鼠胚胎心肌细胞系H9c2 (0.525.0μm波长,0.054.30μm振幅).
- 评估了细胞形态,线粒体分裂,能量代谢,活性氧物种 (ROS) 生产和AMPK通路激活.
- 进行了转录基因分析,以确定涉及的关键信号通路.
主要成果:
- 表面地形引发了心肌细胞行为和线粒体平衡的非线性反应.
- 一个3μm波长/0.7μm振幅的表面促进了细胞的延长和方向.
- 一个0.5μm波长/0.05μm振幅的表面通过细胞骨架重塑诱导显著的线粒体分裂,破坏能量代谢,增加ROS,并激活AMPK通路.
- 转录组分析显示了p53,FoxO,mTOR,HIF-1和AMPK信号通路的参与.
结论:
- 对齐的微/纳米地形刺激显著影响心肌细胞中的线粒体动力学和恒常性.
- 特定的地形特征可以破坏线粒体功能,为心血管疾病提供潜在的治疗点.
- 了解这些调节机制对于开发用于心血管疾病诊断和治疗的基于生物材料的先进策略至关重要.
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