A&R:通过在T细胞和外泌体中过表达嗜酸性粒细胞阳离子蛋白诱导干扰素-γ和组织炎症

2022-01-23 MedSci原创 MedSci原创

T 细胞或T细胞衍生的外泌体中嗜酸性粒细胞阳离子蛋白(ECP)过表达可能是与系统性红斑狼疮 (SLE)相关的肾炎、肝炎和关节炎的生物标志物和致病因素。

    目的:T细胞在系统性红斑狼疮 (SLE) 的发病机制中起关键作用。SLE患者血清来源的外泌体增加,并与疾病严重程度相关。本研究旨在调查T细胞衍生的外泌体蛋白是否在 SLE 发病机制中起作用

      方法:研究者通过MACSPlex外泌体分析和蛋白质组学对SLE患者和健康对照的 T 细胞衍生外泌体中的蛋白质进行了表征。为了研究鉴定的外泌体蛋白的潜在致病功能,研究者生成并表征了在T细胞中过度表达该蛋白的T细胞特异性转基因小鼠。

     结果:研究者鉴定出嗜酸性粒细胞阳离子蛋白(ECP,也称为人RNase III)在SLE T 细胞衍生的外泌体中过度表达 T 细胞特异性ECP转基因小鼠(每组 n = 5)表现出早期诱导血清干扰素-γ(IFNγ)(P = 0.062)和多种组织类型的炎症。老年T细胞特异性 ECP转基因小鼠(每组 n = 3)也显示出滤泡辅助T细胞和血浆B细胞数量以及自身抗体水平的增加(P < 0.01)。单细胞RNA测序显示在ECP转基因小鼠T细胞中诱导 IFNγ 信使 RNA (P = 2.2×10-13) 和炎症通路。值得注意的是,过继转移的含有ECP的外泌体刺激了受体小鼠的血清自身抗体水平(P < 0.01)和组织 IFNγ水平(每组 n = 3)。转移的外泌体渗入受体小鼠的多个组织,导致肝炎、肾炎和关节炎。

      结论:此研究结果表明,T 细胞或T细胞衍生的外泌体中ECP过表达可能是与SLE 相关的肾炎、肝炎和关节炎的生物标志物和致病因素。

 

出处:

Chuang, H.-C., Chen, M.-H., Chen, Y.-M., Ciou, Y.-R., Hsueh, C.-H., Tsai, C.-Y. and Tan, T.-H. (2022), Induction of Interferon-γ and Tissue Inflammation by Overexpression of Eosinophil Cationic Protein in T Cells and Exosomes. Arthritis Rheumatol, 74: 92-104. https://doi.org/10.1002/art.41920

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    2022-10-18 lq1767
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    2022-02-08 ms3000000637975859

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