暴露于颗粒的骨细胞通过Connexin 43抑制骨质细胞的分化
Hao Chai1, Qun Huang1, Zixue Jiao1
1Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China.
International journal of molecular sciences
|July 14, 2023
概括
颗粒在周围假肢骨解中增加骨细胞中的连接素43 (Cx43),抑制骨质细胞分化. 减少骨细胞中的Cx43促进骨质生成,这表明Cx43在这种并发症中的作用.
科学领域:
- 生物材料科学 生物材料科学
- 整形外科手术 整形外科手术
- 细胞生物学 细胞生物学
背景情况:
- 周围假肢骨解 (PPO) 是完全关节置换的主要并发症,由磨损颗粒驱动.
- 骨细胞被认为是磨损颗粒诱导的骨质溶解的关键参与者,但根本机制尚未完全理解.
- 连接素43 (Cx43) 是一种隙结蛋白,涉及到细胞通信和分化.
研究的目的:
- 调查连素43 (Cx43) 在 (Ti) 颗粒诱导的周围假肢骨解 (PPO) 期间骨质细胞与骨质母细胞分化中的作用.
- 在PPO的背景下阐明骨细胞中Cx43影响骨质母细胞功能和骨形成的机制.
主要方法:
- 在骨细胞选择性Cx43 (CKO) 缺陷和野生型 (WT) 小鼠中使用Ti粒子建立了小鼠骨骨解析模型.
- 使用了体外共培系统与骨细胞 (MLO-Y4) 和骨质细胞 (MC3T3-E1) 细胞系,操纵Cx43表达和细胞间通信.
- 分析了骨解,骨质生成标志物,Cx43和β-catenin表达,以及Wnt信号通路活动.
主要成果:
- 在CKO小鼠中,Ti粒子诱导的骨解部分减弱,β-catenin和骨质生成标志物增加.
- 在体外,Ti颗粒增加了骨细胞中的Cx43和降低了β-catenin;Cx43沉默促进了β-catenin和骨质细胞分化.
- 发现Cx43结合β-catenin,抑制其核转位并与Wnt通路活性负相关.
结论:
- 颗粒增加了骨细胞Cx43的表达,这抑制了骨质母细胞的分化,并促进了PPO.
- 骨细胞通过在PPO期间通过Cx43介导的β-catenin和Wnt信号通路的调节来调节骨质细胞功能.
- 在骨细胞中准Cx43可能提供一种治疗策略,以减轻PPO.
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