依赖MMP12的肌纤维细胞形成有助于核脉纤维化
Yi Sun1, Wai-Kit Tam2, Manyu Zhu2
1Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen, China.
JCI insight
|March 4, 2025
概括
矩阵金属蛋白酶12 (MMP12) 在椎间盘退化 (IDD) 中驱动核脉纤维化. 抑制MMP12可以减少纤维化,促进软骨矩阵重塑,为腰部疼痛提供潜在的治疗点.
科学领域:
- 生物化学 生物化学
- 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:
- 椎间盘退化 (IDD) 是腰部疼痛的主要原因之一,其特点是核脉 (NP) 纤维化和肌纤维细胞积累.
- 矩阵金属蛋白酶12 (MMP12) 表达在IDD中升高,但其在NP纤维化中的特定作用尚不清楚.
研究的目的:
- 研究MMP12在TGF-β1诱导的肌纤维细胞分化和IDD中的NP纤维化中的作用.
- 探索在IDD中准MMP12的治疗潜力.
主要方法:
- 人类NP细胞被TGF-β1治疗以诱导肌纤维细胞分化,有或没有MMP12敲击.
- 进行了转录组分析,以确定受MMP12影响的信号通路.
- 使用MMP12淘汰赛 (KO) 鼠标来建模IDD,并评估NP纤维化和矩阵组成.
主要成果:
- 在人类NP细胞中,TGF-β1诱导了MMP12表达和肌纤维细胞分化.
- MMP12倒置逆转了肌纤维细胞表型,并增强了原体标记物的表达.
- 在MMP12-KO小鼠中,NP纤维化减少,I/III原蛋白减少,II/aggrecan原蛋白增加,细胞群发生变化 (更多的SOX9+/CNMD+,少的αSMA+).
- 通过MMP12介导的肌纤维细胞表型获取涉及纤维细胞激活,骨质生成,MAPK和Wnt信号通路.
结论:
- 在IDD中,MMP12在促进肌纤维细胞生成和细胞核纤维化方面发挥着关键作用.
- 准MMP12可能是一个有希望的策略来抑制NP纤维化和恢复IDD中的软骨基质.
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