抗髓氧化酶抗体调节炎症反应,并激活人体单细胞中的益纤维细胞通路
Fernanda Flórez-Barrós1, Siobhan Bearder1, Polychronis Pavlidis1
1School of Immunology and Microbial Sciences, King's College London, UK.
Journal of autoimmunity
|June 18, 2023
概括
抗髓氧化酶 (抗MPO) IgG,与抗蛋白酶3 (抗PR3) IgG不同,在抗中性质细胞质抗体相关血管炎 (AAV) 中显著影响人类单细胞功能和存活率. 这些效应通过CD32a受体进行介导,影响基因表达和潜在的疾病表型.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 抗中性粒细胞质抗体相关性血管炎 (AAV) 的特点是自身抗体,如抗髓氧化酶 (anti-MPO) 和抗蛋白酶3 (anti-PR3).
- 单细胞在AAV的发病过程中起着至关重要的作用,但抗MPO和抗PR3IgG对这些细胞的特定作用尚未完全理解.
研究的目的:
- 研究抗MPO和抗PR3IgG对人类单细胞功能和基因表达的不同影响.
- 阐明Fc受体,特别是CD32a在调解这些效应中的作用.
主要方法:
- 人类周围血液单细胞被培养成托尔类受体 (TLR) 激动剂,抗MPO IgG和抗PR3 IgG.
- 在6小时和24小时后进行了全转录组概况 (RNA测序) 分析.
- 评估了细胞表面标记物表达,IL-10分泌和单细胞存活率.
- 研究了Fc受体的参与,特别是CD32a.
主要成果:
- 反MPO IgG,但不是反PR3 IgG,在TLR刺激时减少IL-10分泌和改变细胞表面标记物表达.
- 抗MPOIgG增强了单细胞存活率,独立于TLR刺激,这种影响取决于CD32a.
- 转录分析显示了对抗MPO IgG的明显反应,包括在24小时没有TLR刺激的情况下丰富细胞外基因基因.
- 对抗分析证实了关键发现和CD32a.的作用.
结论:
- 抗MPOIgG对人体单细胞具有显著的CD32a依赖作用,与抗PR3IgG显著不同.
- 这些发现表明,抗MPOIgG激活益纤维细胞转录程序可能会导致不同的AAV疾病表型.
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