ARD: 保护性和促炎性滑膜组织T细胞多功能性之间失去平衡早于类风湿性关节炎的临床发作

2022-01-18 MedSci原创 MedSci原创

本研究调查类风湿性关节炎 (RA)、高危个体 (IAR) 和健康对照 (HC) 滑膜组织活检中的T细胞,发现从潜在保护性T细胞转变为致病性T细胞早于RA临床炎症的发作。

      目的:本研究调查类风湿性关节炎 (RA)、高危个体 (IAR) 和健康对照 (HC) 滑膜组织活检中的致病性和保护性多功能T细胞反应,并确定在临床炎症发展之前在RA关节中富集的新的致病性多功能T细胞群的存在。      方法:对先前获得的来自RA (n=118)IAR (n=20)HC (n=44)的滑膜活检的RNAseq 数据进行通路富集分析。来自RA (n = 10)IAR (n = 7)HC (n = 7)的单细胞滑膜组织悬液和配对的外周血单核细胞 (PBMC) 在体外被刺激并通过流式细胞仪分析多功能滑膜T细胞亚群、极其复杂评估的简化表示 (SPICE) FlowSom聚类。流式成像用于确认特定的 T细胞簇识别。荧光寿命成像显微镜 (FLIM) 用于可视化分选T细胞群的代谢状态。

     结果:在RA患者滑膜组织中证实了Tfh细胞的可塑性增加和CD4 T细胞多功能性与丰富的记忆Treg细胞反应。滑膜组织RNAseq分析表明,T细胞活化和分化途径的富集早于RA的发病IARRA患者滑膜组织中,从潜在的保护性IL-4和粒细胞巨噬细胞集落刺激因子(GMCSF)主导的多功能CD4 T细胞向致病性多功能反应转变是明显的。聚类分析揭示了IARRA而非HC滑膜组织中高度多功能CD4+ CD8dim T 细胞的积累CD4+ CD8dim T细胞显示出对氧化磷酸化的利用增加,这是代谢引发的记忆T细胞的一个特征。滑膜CD4+ CD8dim T 细胞的百分比与RA疾病活动相关。

结论:从潜在保护性T细胞转变为致病性T细胞多功能性早于RA临床炎症的发作,为RA的治疗干预提供了机会。

出处:

Floudas A, Neto N, Orr C, et al.Loss of balance between protective and pro-inflammatory synovial tissue T-cell polyfunctionality predates clinical onset of rheumatoid arthritis.Annals of the Rheumatic Diseases 2022;81:193-205.

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    2022-01-26 ms5000001649854049

    每次指南更新到全中文版有点慢,大部分是截取其中一部分

    0

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