通过降低M-CSF和RANKL信号的调节,DCIR可以抑制骨质细胞的扩散和再吸收
Tomonori Kaifu1, Takumi Maruhashi2, Soo-Hyun Chung3
1Division of Immunology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi, Japan.
Frontiers in immunology
|June 2, 2023
概括
树突细胞免疫受体 (DCIR) 缺陷通过增加增殖和分化来增强骨质细胞生成. DCIR-NA2相互作用通过降低M-CSF和RANKL信号通路的调节来抑制骨质细胞形成.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 骨的新陈代谢 骨的新陈代谢
背景情况:
- 树突细胞免疫受体 (DCIR) 是一种抑制性C型乳素受体,调节免疫反应和骨代谢.
- 缺少DCIR可以增强骨质细胞生成和树突细胞抗原呈现.
- 亚洲双年生N-甘氨酸 (NA2) 是DCIR的配体,可以抑制骨质细胞生成.
研究的目的:
- 阐明DCIR-NA2轴调节骨质细胞生成的机制.
- 调查DCIR缺乏对骨髓衍生的巨细胞和骨质细胞功能的影响.
- 探索受DCIR-NA2相互作用影响的信号通路.
主要方法:
- 野生类型 (WT) 和Dcir淘汰赛 (Dcir) 骨髓衍生的巨细胞 (BMM) 和骨质细胞 (OCs) 的比较.
- 在对M-CSF和RANKL的反应中评估BMM的扩散和分化.
- 对骨质细胞吸收活性,细胞融合和基因表达的分析.
- 对M-CSF和RANKL.L.的反应中Akt酸化的评估.
主要成果:
- 与WT相比,BMMs对M-CSF和RANKL表现出增强的增殖和差异化反应.
- Dcir-/-OCs表现出增加的吸收活性和细胞融合.
- 神经氨基酶4的表达在Dcir-/-OCs中升高.
- 在WT BMMs中DCIR-NA2相互作用降低了Akt酸化,与Dcir BMMs不同.
结论:
- 通过降低M-CSF和RANKL信号的调节,DCIR可以负面调节骨质细胞形成.
- 通过DCIR介导的信号影响骨质细胞末端的分化和功能.
- DCIR-NA2轴在维持骨质平衡中发挥着至关重要的作用.
- 通过DCIR信号,可以通过糖化酶表达来控制寡糖糖类的修饰.
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