来自抗MDA5+ CADM患者的IgG通过RP-ILD中的CD16损害了RP细胞功能
Yiying Yang1, Ke Liu2, Muyuan Li2
1Department of Rheumatology and Immunology, Xiangya Hospital, Department of Pathophysiology, Xiangya School of Basic Medicine Science, Central South University, Changsha, Hunan, China; Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, Hunan, China; Postdoctoral Research Station of Biology, Xiangya School of Basic Medicine Science, Central South University, Changsha, Hunan, China.
自然杀手 (NK) 细胞功能障碍和巨细胞活化增加发生在抗MDA5皮质神经炎患者的间歇性肺部疾病. 这涉及改变IgG细胞相互作用和信号通路,导致严重的炎症.
科学领域:
- 免疫学 免疫学 免疫学
- 类风湿病学 类风湿病学
- 肺部病理学 肺部病理学
背景情况:
- 抗MDA5自身抗体阳性临床 Amyopathic Dermatomyositis (CADM) 可能导致快速进展的间歇性肺病 (RP-ILD).
- 自然杀手 (NK) 细胞功能在免疫反应中至关重要,其功能障碍与自身免疫性疾病有关.
研究的目的:
- 为了研究抗MDA5+CADM患者与RP-ILD的NK细胞功能障碍.
- 探索巨细胞激活的作用和这种情况的潜在机制.
主要方法:
- 从抗MDA5+和抗Jo-1+皮肤肌炎患者的外周血液单核细胞 (PBMC) 的基因表达概况.
- 细胞因子分析,NK细胞细胞毒性和信号通路 (PLC-γ2,MAPK) 的流细胞计.
- 使用患者IgG和THP-1巨细胞对抗体依赖的细胞毒性 (ADCC) 和细胞化 (ADCP) 的评估.
主要成果:
- 抗MDA5+患者的NK细胞激活标志物减少,sCD163/ferritin增加.
- 在抗MDA5+ CADM中,RP-ILD的NK细胞百分比,细胞毒性和脱粒度都降低了.
- 患者通过CD16增强IgG巨细胞ADCC/ADCP,从而改变PLCγ2-MAPK信号传递.
结论:
- NK细胞功能障碍和巨细胞活化升高与抗MDA5+CADM与RP-ILD中的CD16依赖性IgG细胞相互作用失调有关.
- 由FcγR介导的免疫失调可能会导致RP-ILD的严重炎症表型.
- 在PLCγ2-MAPK信号中出现的乱与这些免疫变化有关.
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