COVID-19 肺炎的空间转录组学特征分析确定了与组织损伤相关的免疫回路。
Spatial transcriptomic characterization of COVID-19 pneumonitis identifies immune circuits related to tissue injury.
机构信息
Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom.
Department of Pathology.
出版信息
JCI Insight. 2023 Jan 24;8(2):e157837. doi: 10.1172/jci.insight.157837.
Severe lung damage resulting from COVID-19 involves complex interactions between diverse populations of immune and stromal cells. In this study, we used a spatial transcriptomics approach to delineate the cells, pathways, and genes present across the spectrum of histopathological damage in COVID-19-affected lung tissue. We applied correlation network-based approaches to deconvolve gene expression data from 46 areas of interest covering more than 62,000 cells within well-preserved lung samples from 3 patients. Despite substantial interpatient heterogeneity, we discovered evidence for a common immune-cell signaling circuit in areas of severe tissue that involves crosstalk between cytotoxic lymphocytes and pro-inflammatory macrophages. Expression of IFNG by cytotoxic lymphocytes was associated with induction of chemokines, including CXCL9, CXCL10, and CXCL11, which are known to promote the recruitment of CXCR3+ immune cells. The TNF superfamily members BAFF (TNFSF13B) and TRAIL (TNFSF10) were consistently upregulated in the areas with severe tissue damage. We used published spatial and single-cell SARS-CoV-2 data sets to validate our findings in the lung tissue from additional cohorts of patients with COVID-19. The resulting model of severe COVID-19 immune-mediated tissue pathology may inform future therapeutic strategies.
严重的 COVID-19 肺损伤涉及免疫细胞和基质细胞等多种细胞群体之间的复杂相互作用。在这项研究中,我们使用空间转录组学方法描绘了 COVID-19 受累肺组织中各种组织病理学损伤的细胞、途径和基因。我们应用基于相关网络的方法对 3 名患者的 62000 多个保存完好的肺样本中 46 个感兴趣区域的基因表达数据进行反卷积。尽管存在很大的个体间异质性,但我们在严重组织损伤区域发现了涉及细胞毒性淋巴细胞和促炎巨噬细胞之间串扰的共同免疫细胞信号通路的证据。细胞毒性淋巴细胞表达 IFNG 与趋化因子(包括 CXCL9、CXCL10 和 CXCL11)的诱导有关,这些趋化因子已知可促进 CXCR3+免疫细胞的募集。TNF 超家族成员 BAFF(TNFSF13B)和 TRAIL(TNFSF10)在严重组织损伤区域持续上调。我们使用已发表的空间和单细胞 SARS-CoV-2 数据集来验证我们在 COVID-19 患者其他队列的肺组织中的发现。严重 COVID-19 免疫介导的组织病理学的最终模型可能为未来的治疗策略提供信息。