COVID-19 中的失调性炎症特征:增强的中性粒细胞,但受损的单核细胞和树突状细胞的反应性。

Disharmonic Inflammatory Signatures in COVID-19: Augmented Neutrophils' but Impaired Monocytes' and Dendritic Cells' Responsiveness.

机构信息

Department of Immunology, 2nd Faculty of Medicine, Charles University in Prague and University Hospital in Motol, 15006 Prague, Czech Republic.

Department of Pediatrics, 1st Faculty of Medicine, Charles University in Prague and Thomayer's Hospital, 15006 Prague, Czech Republic.

出版信息

Cells. 2020 Sep 29;9(10):2206. doi: 10.3390/cells9102206.

Abstract

COVID-19, caused by SARS-CoV-2 virus, emerged as a pandemic disease posing a severe threat to global health. To date, sporadic studies have demonstrated that innate immune mechanisms, specifically neutrophilia, NETosis, and neutrophil-associated cytokine responses, are involved in COVID-19 pathogenesis; however, our understanding of the exact nature of this aspect of host-pathogen interaction is limited. Here, we present a detailed dissection of the features and functional profiles of neutrophils, dendritic cells, and monocytes in COVID-19. We portray the crucial role of neutrophils as drivers of hyperinflammation associated with COVID-19 disease via the shift towards their immature forms, enhanced degranulation, cytokine production, and augmented interferon responses. We demonstrate the impaired functionality of COVID-19 dendritic cells and monocytes, particularly their low expression of maturation markers, increased PD-L1 levels, and their inability to upregulate phenotype upon stimulation. In summary, our work highlights important data that prompt further research, as therapeutic targeting of neutrophils and their associated products may hold the potential to reduce the severity of COVID-19.

摘要

新型冠状病毒肺炎(COVID-19)是由严重急性呼吸综合征冠状病毒 2(SARS-CoV-2)病毒引起的一种大流行疾病,对全球健康构成严重威胁。迄今为止,一些零星研究表明,固有免疫机制,特别是中性粒细胞增多、细胞 NETosis 和中性粒细胞相关细胞因子反应,与 COVID-19 的发病机制有关;然而,我们对宿主-病原体相互作用这一方面的确切性质的理解是有限的。在这里,我们详细剖析了 COVID-19 中中性粒细胞、树突状细胞和单核细胞的特征和功能特征。我们通过中性粒细胞向不成熟状态的转变、脱颗粒增强、细胞因子产生和干扰素反应增强,描绘了中性粒细胞作为与 COVID-19 疾病相关的过度炎症驱动因素的关键作用。我们证明了 COVID-19 树突状细胞和单核细胞的功能受损,特别是其成熟标志物表达降低、程序性死亡配体 1(PD-L1)水平升高以及在刺激下无法上调表型。总之,我们的工作强调了重要的数据,这促使我们进一步研究,因为针对中性粒细胞及其相关产物的治疗靶向可能有潜力降低 COVID-19 的严重程度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a9a3/7600406/642e0755eaa3/cells-09-02206-g001.jpg

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