免疫复合体驱动的中性粒细胞激活和BAFF释放:与SLE中B细胞反应的联系
Ting Wang1, Andrew Vasconcellos2,3, John Marken2
1Department of Medicine, Division of Rheumatology, University of Washington, Seattle, Washington, USA tw65@uw.edu giltiayn@uw.edu.
Lupus science & medicine
|November 8, 2023
概括
免疫复合体激活中性粒细胞,导致它们释放BAFF,B细胞生存因子. 这促进了B细胞的激活和分化,为系统性红斑狼 (SLE) 提供了一个新的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 类风湿病学 类风湿病学
背景情况:
- 中性粒细胞在系统性红斑狼 (SLE) 发病过程中的作用尚不清楚.
- 研究免疫复合体 (IC) 驱动的中性粒细胞激活,B细胞存活因子BAFF和SLE中B细胞激活之间的联系.
研究的目的:
- 探索中性粒细胞在驱动SLE病原性B细胞反应中的作用.
- 了解IC驱动的中性粒细胞激活和BAFF释放的机制.
- 评估中性粒细胞介导的B细胞激活和分化.
主要方法:
- 使用ELISA分析了SLE患者 (n=60) 和健康对照组 (n=20) 的BAFF水平.
- 与疾病活动标志物,中性粒细胞激活和循环ICs相关的BAFF水平.
- 刺激中性粒细胞与RNP/IgGICs在体外研究BAFF释放,NET形成和B细胞反应.
主要成果:
- 在SLE患者中,BAFF水平与抗dsDNA抗体,C3水平和ICs等疾病活动标志物相关.
- 用RNP-ICs诱导中性粒细胞刺激导致BAFF释放和中性粒细胞外细胞陷 (NET) 的形成.
- 中性粒细胞在体外促进了B细胞的存活,增殖和血细胞分化.
结论:
- 通过NET形成,免疫复合体触发中性粒细胞释放BAFF,促进B细胞的生存和激活.
- 中性粒细胞直接增强B细胞的激活和分化.
- 向中性粒细胞-B细胞相互作用可能会抑制SLE的致病性B细胞反应.
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