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通过稳定PPARγ,LRP1通过抑制内质网膜应激来缓解椎间盘退化

Dengbo Yao^1,2, Ming Li¹, Weike Zeng³

¹Department of Orthopedics Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.

Journal of orthopaedic translation

|February 3, 2025

概括

针对低密度脂蛋白受体相关蛋白1 (LRP1) 显示出治疗椎间盘退化症 (IDD) 的前景. 激活LRP1通过抑制内质网膜应激来减少细胞死亡和基质分解,为IDD提供了一种新的治疗策略.

科学领域:

生物医学研究的研究.
细胞生物学细胞生物学
分子医学是分子医学.

背景情况:

椎间盘退化 (IDD) 是腰部疼痛的主要原因,涉及细胞衰老,细胞亡和细胞外基质 (ECM) 分解.
低密度脂蛋白受体相关蛋白1 (LRP1) 与ECM调节和细胞命运有关,但其在IDD中的具体作用尚不清楚.

研究的目的:

研究LRP1在IDD进展中的功能和潜在机制.
探索LRP1在调节核脉 (NP) 细胞亡,ECM新陈代谢和内质网膜 (ER) 压力中的作用.

主要方法:

在人类IDD组织和大鼠IDD模型中评估LRP1表达.
分析了LRP1倒置和激活 (使用SP16) 对NP细胞的影响.
研究了LRP1和氧酶增殖器激活受体玛 (PPARγ) 之间的相互作用及其对ER压力的影响.
在鼠尾IDD模型中评估了SP16的体内治疗潜力.

主要成果:

在IDD中,LRP1的表达显著减少.
在NP细胞中LRP1的淘汰会增加细胞亡和ECM重塑,与ER应激激活相关.
LRP1稳定了PPARγ,减轻了ER的压力.
通过SP16激活LRP1,减少了ER压力,矩阵降解和亡在体外和体内.

结论:

通过通过LRP1/PPARγ/ER应力轴抑制ER应力,LRP1在IDD中起着保护作用.
准LRP1代表了治疗IDD的潜在新疗法策略.

关键词:

细胞灭亡 (apoptosis) 是一种死亡的过程.细胞内膜网膜应激压力细胞外矩阵是细胞外矩阵.椎间盘退化椎间盘退化一个LRP1的LRP1 细胞的核是脉细胞.

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