Jagged1作为RBP-J目标和反作用抑制TNF介导的炎症性骨质结晶发生
Courtney Ng1, Yongli Qin1,2, Yuhan Xia1
1Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY.
Journal of immunology (Baltimore, Md. : 1950)
|September 27, 2023
概括
瘤亡因子 (TNF) 在炎症性疾病中驱动骨质损失. 我们发现Jagged1,一个Notch连接体,抑制了TNF诱导的骨质细胞形成,为炎症性骨损失提供了潜在的治疗标.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 类风湿病学 类风湿病学
背景情况:
- 瘤亡因子 (TNF) 在诸如类风湿性关节炎 (RA) 这样的疾病中与炎症性骨质再吸收有关.
- 抑制TNF驱动骨质细胞生成的机制,特别是巨细胞分化成骨质细胞的机制,尚未完全理解.
- RBP-J是一种已知的TNF介导骨质结晶发生的抑制剂.
研究的目的:
- 为了确定抑制TNF诱导的骨质细胞形成的新机制.
- 调查Notch通路,特别是Jagged1在调节TNF介导的骨再吸收中的作用.
- 探索Jagged1作为炎症性骨损失的潜在治疗点.
主要方法:
- 研究了TNF,RBP-J和Jagged1表达在骨质细胞分化中的关系.
- 用小鼠模型和人类外周血液单细胞进行实验.
- 评估了复合Jagged1对炎症性骨质细胞形成的影响.
主要成果:
- 识别了Jagged1作为一个直接的RBP-J目标,由TNF诱导.
- 证明TNF诱导的Jagged1作为TNF介导骨质结晶生成的反抑制剂.
- 在RA患者中观察到Jagged1水平的降低,与骨质细胞形成的增加相关.
- 再组合的Jagged1抑制了人类的炎症性骨质细胞形成,而不会影响炎症性基因表达.
结论:
- Jagged1链接TNF和Notch信号,作为TNF诱导的骨质细胞形成的关键负调节器.
- 降低RA中的Jagged1水平可能会导致过度的骨再吸收.
- Jagged1代表了一种有前途的治疗标,用于减轻炎症性骨损失,对免疫反应的影响最小.
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