血中激活中性粒细胞产生的可溶性CD16b的增加与IgA脏病的发病和进展有关
Youxia Liu1, Hongshan Chen1, Hongfen Li1
1Department of Nephrology, Tianjin Medical University General Hospital, Tianjin, PR China.
International immunopharmacology
|September 16, 2025
概括
可溶性CD16b是中性粒细胞上的IgG受体,显示出IgA脏病 (IgAN) 的生物标志物的潜力. 血和尿液中的高水平可能表明Igan患者的疾病严重程度和预后.
科学领域:
- 免疫学 免疫学 免疫学
- 腎臟病學 (nephrology) 是一種醫學.
- 生物标志物发现发现
背景情况:
- CD16b (FcγIIIB) 是一种在中性粒细胞表达的IgG受体,在激活后,中性粒细胞将其释放到循环中.
- 免疫球蛋白A脏病 (IgAN) 是一种脏疾病,进展变化且预后生物标志物有限.
- 中性粒细胞激活和免疫复合体沉积与IgAN病原发生有关.
研究的目的:
- 调查血和尿液中的CD16b水平作为IgA脏病 (IgAN) 的潜在生物标志物.
- 评估CD16b水平与IgAN敏感性,疾病严重程度和患者预后的相关性.
- 探索中性粒细胞激活在IGAN病变发生中的作用及其与CD16b的联系.
主要方法:
- 在两个独立的患者队列 (40和85名Igan患者) 和对照组中分析了血和尿液中的CD16b水平.
- 血液mRNA测序以识别Igan患者的基因表达变化.
- 在体外刺激IgAN患者的中性粒细胞,IgG含有IgG的免疫复合体 (IgG-ICs).
- 与外围血液单核细胞 (PBMC) 和活性中性粒细胞共同培养实验.
- 在患有新月IgAN的患者的细胞活检上,免疫组织化学.
主要成果:
- 与对照组相比,IgAN患者的血CD16b水平显著升高,与更快的GFR下降相关.
- 由IgG-ICs诱导的IgAN患者中性粒细胞激活导致表面CD16b的减少和可溶性CD16b,APRIL和BAFF的增加.
- 活性中性粒细胞促进了B细胞和血细胞分化以及PBMC中的IgA产生.
- 尿中的CD16b在Igan中升高,在炎症的淋巴细胞中发现了CD16/弹性酶.
- 血CD16b-IgG复合体水平降低与较高的IgG和eGFR以及较低的蛋白尿相关.
结论:
- 溶性CD16b是IgA脏病中具有临床意义的分子,作为疾病活动和进展的潜在生物标志物.
- 中性细胞激活,以CD16b释放和与免疫复合体相互作用为特征,在IgAN病变发生中起着至关重要的作用.
- CD16b水平和中性粒细胞的行为为IgAN的基础机制提供了洞察力,并可能指导治疗策略.
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