机械过载导致冠状细胞退化和衰老,通过Zmpste24介导的核膜不稳定性
Keyu Kong1, Minghao Jin1, Chen Zhao1
1Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
iScience
|November 15, 2023
概括
骨关节炎 (OA) 患者的膝盖经历异常的压力,导致状细胞衰老. 减少的Zmpste24蛋白和核不稳定性有助于这一过程,提供潜在的治疗点.
科学领域:
- 生物医学工程 生物医学工程
- 细胞生物学 细胞生物学
- 整形外科 整形外科 整形外科
背景情况:
- 骨关节炎 (OA) 经常与膝关节的位对齐有关,造成异常的机械环境.
- 软骨细胞的机械过载有助于细胞衰老,这是OA病变发生的关键因素.
研究的目的:
- 为了研究状细胞衰老的分子机制,由机械应激诱导在 varus 膝盖.
- 阐明Zmpste24 (核膜蛋白) 在机械过载和冠状细胞衰老中的作用.
主要方法:
- 有限元分析,以识别高压力区域在 varus 膝盖.
- 免疫组织化学评估Zmpste24和p21在受影响的软骨中的表达.
- 在体外细胞伸展模型和体内动物研究中评估Zmpste24的功能.
- 反应性氧物种 (ROS) 清理试验.
主要成果:
- 前中高原经历了最大的机械应力在膝.
- 在高压力区域观察到较低的Zmpste24表达和较高的p21 (衰老标志物).
- 证实了Zmpste24水平与机械诱导衰老之间的反向关系.
- 过度表达Zmpste24通过清除ROS.减少了软骨退化和衰老.
结论:
- 在varus膝关节中,对骨前中高原的异常压力导致Zmpste24的降低调节和核不稳定性,促进状细胞衰老.
- Zmpste24和核膜稳定性是与膝关节异常对齐相关的骨关节炎的潜在治疗点.
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