14-3-3ζ通过破坏TRAF6的稳定性来抑制RANKL信号
R Ayyasamy1, S Fan2, P Czernik3
1Department of Physiology & Pharmacology, College of Medicine & Life Sciences, University of Toledo, Toledo, Ohio, USA.
The Journal of biological chemistry
|June 22, 2024
概括
14-3-3ζ蛋白通过调节TRAF6水平来抑制骨损失,抑制核因子-κβ连接体 (RANKL) 信号和骨质细胞活性的炎症受体激活剂. 这项研究揭示了骨重塑的新机制.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 骨生物学 骨生物学 骨生物学
背景情况:
- 巨细胞是炎症和骨质损失的关键调节者.
- 核因子-κβ连接体 (RANKL) 的受体激活器驱动骨质细胞分化和骨质再吸收.
- 14-3-3ζ在RANKL信号传递和骨重塑中的作用以前是未知的.
研究的目的:
- 研究14-3-3ζ在调节RANKL信号和骨质细胞活动中的作用.
- 阐明14-3-3ζ影响骨质细胞生成的分子机制.
主要方法:
- 利用了缺乏14-3-3ζ的骨髓原发性巨细胞和RAW264.7细胞.
- 在RANKL刺激时评估骨质细胞分化,骨质再吸收和信号通路激活 (MAPK,AKT,NFATC1,p65).
- 研究的蛋白质与蛋白质相互作用 (14-3-3ζ-TRAF6,RANK-TRAF6) 和TRAF6的无处不在/降解.
主要成果:
- 14-3-3ζ缺乏增强了骨质细胞形成和骨质再吸收活动.
- 14-3-3ζ抑制了RANKL诱导的MAPK/AKT酸化和转录因子的核转位.
- 14-3-3ζ与TRAF6相互作用,促进其无处不在和降解,从而抑制RANKL信号.
结论:
- 14-3-3ζ通过控制TRAF6的稳定性,作为RANKL信号的负调节器.
- 14-3-3ζ抑制骨质细胞活动和骨再吸收.
- 这项研究确定了14-3-3ζ在调节骨重塑和炎症方面的新作用.
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