Gene Expression Nebulas
A data portal of transcriptomic profiles analyzed by a unified pipeline across multiple species

Gene Expression Nebulas

A data portal of transcriptome profiles across multiple species

PRJNA706022: Fatal cytokine release syndrome by an aberrant FLIP/STAT3 axis

Source: NCBI / GSE168098
Submission Date: Mar 02 2021
Release Date:
Update Date: Sep 15 2021

Summary: Inflammatory responses rapidly detect pathogen invasion and mount a regulated reaction. However, dysregulated anti-pathogen immune responses can provoke life-threatening inflammatory pathologies collectively known as cytokine release syndrome (CRS), exemplified by key clinical phenotypes unearthed during the SARS-Cov-2 pandemic. The underlying pathophysiology of CRS remains elusive. We found that FLIP, a protein that controls caspase-8 death pathways, was highly expressed in myeloid cells of COVID-19 lungs. FLIP controlled CRS by fueling a STAT3-dependent inflammatory program. Indeed, constitutive expression of a viral FLIP homologue in myeloid cells triggered a STAT3-linked, progressive and fatal inflammatory syndrome in mice, characterized by elevated cytokine output, lymphopenia, lung injury and multiple organ dysfunctions that mimicked human CRS. As STAT3-targeting approaches relieved inflammation, immune disorders, and organ failures in these mice, targeted intervention towards this pathway could suppress the lethal CRS inflammatory state.

Overall Design: Characterization of the lung immune landscape of vFLIP and wild type (WT) mice using Chromium 10x single-cell RNA-seq (scRNA-seq) data.

GEN Datasets:
GEND000366
Strategy:
Species:
Tissue:
Healthy Condition:
Cell Type:
Protocol
Growth Protocol: -
Treatment Protocol: -
Extract Protocol: Mice were euthanized by CO2 inhalation and lungs were immediately perfused with 20 mL ice-cold PBS. Lungs were cut in small pieces with scissors, enzymatically digested at 37°C for 45 minutes with a solution containing collagenase IV (1mg/ml), hyaluronidase (0.1mg/ml) and DNase (4.5mg/ml) (Sigma-Aldrich). Cells were then collected, filtered and red blood cells were lysed at RT for 5 minutes with ACK Lysing Buffer (Lonza). Cells were then collected, filtered and pooled as follows: 3 untreated-chimera, 3 silibinin-treated, 3 baricitinib-treated and 3 vFLIP-tg mice. The cells were washed with PBS 1x, re-suspended in RPMI 1640 medium supplemented with 5% bovine serum albumin and counted. Cell viability was determined by Trypan blue exclusion. For each sample, cells were resuspended in RPMI supplemented with 5% FBS to a final concentration of 106 /ml for single cell analysis.; Mice were euthanized by CO2 inhalation and lungs were immediately perfused with 20 mL ice-cold PBS. Lungs were cut in small pieces with scissors, enzymatically digested at 37°C for 45 minutes with a solution containing collagenase IV (1mg/ml), hyaluronidase (0.1mg/ml) and DNase (4.5mg/ml) (Sigma-Aldrich). Cells were then collected, filtered and red blood cells were lysed at RT for 5 minutes with ACK Lysing Buffer (Lonza). Cells were then collected, filtered and pooled as follows: 3 WT mice, 3 untreated-chimera, 3 silibinin-treated, 3 baricitinib-treated and 3 vFLIP-tg mice. The cells were washed with PBS 1x, re-suspended in RPMI 1640 medium supplemented with 5% bovine serum albumin and counted. Cell viability was determined by Trypan blue exclusion. For each sample, cells were resuspended in RPMI supplemented with 5% FBS to a final concentration of 106 /ml for single cell analysis.
Library Construction Protocol: Cell suspension were processed using the 10x Genomics Chromium Controller and the Chromium NextGEM Single Cell 3′ GEM, Library& Gel Bead kit v3.1 (Pleasanton, California, United States) following the stand-ard manufacturer’s instructions. In brief, 10,000 live cells were loaded onto the Chromium controller to recover 4,000 single cell GEMs per inlet uniquely barcoded. After synthesis of cDNA, sequencing libraries were generated. Final 10X library quality was assessed using the Fragment Analyzer High Sensitivity NGS kit (Agilent Technologies, Santa Clara, CA, USA) and then sequenced on the Illu-mina NextSeq500 (Illumina, San Diego CA, USA). After synthesis of cDNA, sequencing libraries were generated. Final 10X library quality was assessed using the Fragment Analyzer High Sensitivity NGS kit (Agilent Technologies, Santa Clara, CA, USA) and then sequenced on the Illu-mina NextSeq500 (Illumina, San Diego CA, USA).; Cell suspension were processed using the 10x Genomics Chromium Controller and the Chromium NextGEM Single Cell 3′ GEM, Library& Gel Bead kit v3.1 (Pleasanton, California, United States) following the standard manufacturer’s instructions. In brief, 10,000 live cells were loaded into the Chromium controller to recover 4,000 single cell GEMs per inlet uniquely barcoded. After synthesis of cDNA, sequencing libraries were generated. Final 10X library quality was assessed using the Fragment Analyzer High Sensitivity NGS kit (Agilent Technologies, Santa Clara, CA, USA) and then sequenced on the Illumina NextSeq500 (Illumina, San Diego CA, USA).
Sequencing
Molecule Type: polyA(+) RNA
Library Source:
Library Layout: PAIRED
Library Strand: -
Platform: ILLUMINA
Instrument Model: Illumina NextSeq 500
Strand-Specific: -
Samples
Basic Information:
Sample Characteristic:
Biological Condition:
Experimental Variables:
Protocol:
Sequencing:
Assessing Quality:
Analysis:
Data Resource GEN Sample ID GEN Dataset ID Project ID BioProject ID Sample ID Sample Name BioSample ID Sample Accession Experiment Accession Release Date Submission Date Update Date Species Race Ethnicity Age Age Unit Gender Source Name Tissue Cell Type Cell Subtype Cell Line Disease Disease State Development Stage Mutation Phenotype Case Detail Control Detail Growth Protocol Treatment Protocol Extract Protocol Library Construction Protocol Molecule Type Library Layout Strand-Specific Library Strand Spike-In Strategy Platform Instrument Model Cell Number Reads Number Gbases AvgSpotLen1 AvgSpotLen2 Uniq Mapping Rate Multiple Mapping Rate Coverage Rate
Publications
Fatal cytokine release syndrome by an aberrant FLIP/STAT3 axis.
Cell death and differentiation . 2021-09-13 [PMID: 34518653]