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CELL:重度COVID-19患者展现出髓细胞紊乱的特点

2020-08-07 MedSci原创 MedSci原创

在一项双中心、双队列研究中,研究人员结合全血和外周血单核细胞的单细胞RNA测序和单细胞蛋白质组学,确定了轻度与重度COVID-19(来自109人的242个样本)的免疫细胞组成和活化随时间的变化。

已有的研究显示,COVID-19的临床表现变化很大,虽然大多数患者会出现轻度到中度的症状,但也有10-20%的患者会出现肺炎和严重的疾病表型。呼吸衰竭和急性呼吸窘迫综合征(ARDS)通常在得病两周后出现。 这种动力学可能提示了继发性免疫反应在重症COVID-19的发展中的作用。

然而,至今为止,我们对于COVID-19不同病程的病理生理学的确切机制仍不清楚。

最近,在一项双中心、双队列研究中,研究人员结合全血和外周血单核细胞的单细胞RNA测序和单细胞蛋白质组学,确定了轻度与重度COVID-19(来自109人的242个样本)的免疫细胞组成和活化随时间的变化。

为了探究轻度与重度COVID-19患者免疫反应的不同,研究人员分析了德国两个大学医学中心从独立的患者队列中收集的血液样本。

对于来自柏林队列(队列1)的样本,研究人员使用基于液滴的单细胞平台(10x Chromium),通过质谱细胞仪(CyTOF)和单细胞RNA测序(scRNA-seq)进行分析,而对于来自波恩队列(队列2)的样本,研究人员则通过多色流式细胞仪(MCFC)和基于微孔的scRNA-seq系统(BD Rhapsody)进行分析。

研究人员通过蛋白标记物分析了总共2400万个细胞,通过scRNA-seq分析了53名COVID-19患者和56名对照的242个样本中的>328,000个细胞,其中包括8名FLI患者。

在轻度COVID-19中,具有干扰素刺激基因特征的HLA-DRhiCD11chi炎症单核细胞升高。相比之下,重度COVID-19的特点是中性粒细胞前体的出现,其可以作为紧急髓细胞、功能失调的成熟中性粒细胞和HLA-DRlo单核细胞的证据。

该研究提供了对SARS-CoV-2感染的系统免疫反应的详细见解,也揭示了与严重的COVID-19相关的髓细胞变化特点。

 

原始出处:

Jonas Schulte-Schrepping et al. Severe COVID-19 is marked by a dysregulated myeloid cell compartment, CELL (2020). DOI:https://doi.org/10.1016/j.cell.2020.08.001

 

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    2020-08-22 维他命
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