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ARD:系统性红斑狼疮的抗RNP抗体与干扰素基因特征相关,与降低的补体水平无关

2022-02-24 MedSci原创 MedSci原创

自身抗体与IGS之间存在复杂的关系,抗RNP与AA相关,而抗dsDNA和RNP与EA相关。此外,抗dsDNA(而非抗RBP)与补体水平之间的关系存在差异。

     目的:免疫复合物 (IC)中的抗核核糖核蛋白(RNP)和抗双链DNA(dsDNA)自身抗体诱导干扰素。干扰素反应通常通过分析评估外周血细胞基因表达,可显示 IFN 基因特征 (IGS)。抗 dsDNA IC 沉积在狼疮肾脏,通过固定和激活补体促进肾脏病理变化。这篇研究目的在于阐明特异性抗核抗体 (ANA)、补体和干扰素基因特征 (IGS) 在系统性红斑狼疮 (SLE) 发病机制中的相互关系。

    方法:对来自 Illuminate 试验的数据分析 dsDNA 以及 RNA 结合蛋白 (RBP) 的抗体、C3C4 和各种 IGS 的水平。采用统计假设检验、线性回归分析以及分类和回归树分析来评估 SLE 实验室特征之间的关系。

    结果ANA、补体和 IGS 的相互关系在非洲血统 (AA) 和欧洲血统 (EA) 患者之间存在差异; RNP 和多种自身抗体在 AA 患者中更为常见,尽管两者都与 IGS 的存在有关,但自身抗体和补体之间的关系不同。然而, dsDNAC3C4呈负相关,而抗 RNP的水平与这些标志物无关。IGS仅与EA SLE中的抗dsDNA 相关,而补体与AA SLE 中的IGS更相关。最后,在存在和不存在IGS的情况下会出现自身抗体,而IGS在抗dsDNA/RBP阴性SLE患者中并不常见。

     结论:自身抗体与IGS之间存在复杂的关系,RNPAA相关,而抗dsDNARNPEA相关。此外,dsDNA(而非抗RBP)与补体水平之间的关系存在差异。缺乏抗 RNPC3C4的关系表明抗 RNP 免疫复合物 (IC) 可能在没有补体固定的情况下驱动IGS,而抗 dsDNA IC 涉及补体消耗。未来需要开发更精确的检测方法识别致病性 IC 的存在并确定IGS发生的基本机制。 

    出处:Hubbard EL, et al. Ann Rheum Dis 2022;0:1–12. doi:10.1136/annrheumdis-2021-221662

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    2022-03-06 lucky-sara

    菜啊.&喀你zhierzhier

    0

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    2022-02-25 zhouqu_8

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