血类树突细胞调节IgA粘膜IgA在IgA脏病中的产生
Yusuke Fukao1, Hitoshi Suzuki1,2, Yoshihito Nihei1
1Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan.
概括
粘膜等离子细胞状树突细胞 (pDCs) 通过托尔类受体9 (TLR9) 信号传递促进IgA脏病 (IgAN) 中免疫球蛋白A (IgA) 的异常糖化. 降低pDCs降低异常IgA的产生,这表明pDCs是IgAN的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 腎臟病學 (nephrology) 是一種醫學專業.
- 细胞生物学 细胞生物学
背景情况:
- 异常甘油化IgA是免疫球蛋白A脏病 (IgAN) 发病的核心.
- 收费类受体 (TLR) 9的激活诱导异常的IgA糖化通过一种诱导扩散的配体 (APRIL) 介导的途径.
- 虽然TLR9在B细胞中的作用已知,但它对Igan中的血细胞 dendritic细胞 (pDCs) 的作用尚不清楚.
研究的目的:
- 研究粘膜pDCs在异常甘油化IgA在IgAN患者的合成中的作用.
- 通过TLR9信号来澄清pDCs对Igan病原性的贡献.
主要方法:
- 从IGAN患者的桃体单核细胞 (MNC) 中评估了DC子集分布.
- 在pDC和没有pDC的多国企业中分析异常IgA合成.
- 评估pDC耗尽对异常IgA产生的影响,在用TLR9配体 (CpG-oligonucleotide) 免疫的小鼠IgAN模型 (ddY小鼠) 中.
主要成果:
- 与对照组相比,pDC在Igan palatine桃体中显著更多.
- 在IGAN桃体MNC中,pDC丰度与APRIL和TLR9表达相关.
- 在体外,pDCs增加了异常IgA水平,而pDC耗尽在体内减少了异常IgA.
结论:
- 粘膜pDCs通过通过TLR9信号来增强异常IgA的产生,从而促进IgAN的发病.
- pDCs代表了IgAN的一个潜在的新疗法标.
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