概要: The SARS-CoV-2 novel coronavirus global pandemic (COVID-19) has led to millions of cases and hundreds of thousands of deaths globally. While older adults appear at high risk for severe disease, hospitalizations and deaths due to SARS-CoV-2 among children have been relatively rare. Integrating single-cell RNA sequencing (scRNA-seq) of developing mouse lung with temporally-resolved immunofluorescence in mouse and human lung tissue, we found expression of SARS-CoV-2 Spike protein primer TMPRSS2 was highest in ciliated cells and type I alveolar epithelial cells (AT1), and TMPRSS2 expression increased with aging in mice and humans. Analysis of autopsy tissue from fatal COVID-19 cases detected SARS-CoV-2 RNA most frequently in ciliated and secretory cells in airway epithelium and AT1 cells in peripheral lung. SARS-CoV-2 RNA was highly colocalized in cells expressing TMPRSS2. Together, these data demonstrate the cellular spectrum infected by SARS-CoV-2 in lung epithelium and suggest that developmental regulation of TMPRSS2 may underlie the relative protection of infants and children from severe respiratory illness
项目整体设计: Single Cell RNAseq of dissociated mouse lungs at ages: E18, P0, P7, P14, and P64. Suspensions were enriched for cells that were CD45 negative, Ter119 negative, and viable
At the indicated timepoints, lung lobes were harvested, minced, and incubated for 30 minutes at 37°C in dissociation media (RPMI-1640 with 0.7 mg/ml collagenase XI and 30 mg/ml type IV bovine pancreatic DNase). After incubation, lobes were passed through a wide bore pipet tip and filtered through a 40 μm filter. Single cell lung suspension was then counted, aliquoted, and blocked with CD-32 Fc block (BD cat #553142) for 20 minutes on ice. After 2% FBS staining buffer wash, cells were incubated with the conjugated primary antibodies anti-CD45 (BD cat # 559864) and anti-Ter119 (BD cat# 116211). In the same manner, fluorescence minus one controls were blocked and stained with the appropriate antibody controls. Cells from individual mice were then incubated with identifiable hashtags, resuspended in staining buffer, and treated with PI viability dye. CD45 negative, Ter119 negative, viable cells were collected by fluorescence associated cell sorting using a 70 μm nozzle on a 4-laser FACSAria III Cell Sorter. Both single and fluorescence-minus-one controls were used for compensation.
建库方案:
ScRNA-seq libraries were generated using the 10X Chromium platform 5’ library preparation kits (10X Genomics) following the manufacturer's recommendations and targeting 10,000 - 20,000 cells per sample.
测序信息
分子类型:
Poly(A)+ RNA
库的片段类型:
PAIRED
库的链类型:
-
测序平台:
ILLUMINA
测序仪型号:
Illumina NovaSeq 6000
链特异性:
-
样本
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生物条件:
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数据来源
GEN样本编号
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物种
种族
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性别
来源名称
组织
细胞类型
细胞亚型
细胞系
疾病
疾病状态
发育阶段
突变/变异
表型
Condition Detail
生长方案
处理方案
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分子类型
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加标(Spike-In)
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多重比对率
覆盖度
文章
Age-determined expression of priming protease TMPRSS2 and localization of SARS-CoV-2 in lung epithelium.
The Journal of clinical investigation . 2021-01-01 [PMID:
33180746]