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Neutrophil extracellular trap induced dendritic cell activation leads to Th1 polarization in type 1 diabetes

ABSTRACT: We performed a comparison of transcriptome between monocyte-derived dendritic cells (moDC) cultured with neutrophil extracellular traps (NETs) from healthy donors or type 1 diabetes (T1D) patients. The source of moDCs is healthy donors and T1D patients

ORGANISM(S): Homo sapiens

PROVIDER: GSE143143 | GEO | 2020/01/07

REPOSITORIES: GEO

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Dysregulated neutrophil responses and neutrophil extracellular trap formation and degradation in PAPA syndrome

Project description:Pyogenic arthritis, pyoderma gangrenosum and acne (PAPA) syndrome is characterized by flares of sterile arthritis with neutrophil infiltrate and the overproduction of Interleukin (IL)-1β. The purpose of this study was to elucidate the potential role of neutrophil subsets and neutrophil extracellular traps (NETs) in the pathogenesis of PAPA. The transcriptome of PAPA normal-dense neutrophils, autologous LDGs, and healthy control normal-dense neutrophils was characterized using RNASeq. The transcriptome of a PAPA skin biopsy and a healthy control skin sample was elucidated using RNASeq.

2018-10-23 | GSE117168 | GEO

Interferon-gamma critically determines dendritic cell function

Project description:A growing body of evidence suggests that inflammatory cytokines have a dualistic role in immunity. In this study, we sought to determine the direct effects IFN-gamma on the differentiation and maturation of human peripheral blood monocyte-derived dendritic cells (moDC). Here, we report that following differentiation of human peripheral-blood monocytes into moDCs with granulocyte-macrophage colony-stimulating factor (GM-CSF) and IL-4, interferon-gamma (IFN-gamma) induces moDC maturation and up-regulates the co-stimulatory markers CD80, CD86, CD95, and MHC Class I, enabling moDCs to effectively generate antigen-specific CD4+ and CD8+ T cell responses for multiple viral and tumor antigens. Interestingly, early exposure of monocytes to high concentrations of IFN-gamma promotes monocyte differentiation into macrophages, despite the presence of GM-CSF and IL-4. However, under low concentrations of IFN-gamma, monocytes continue to differentiate into dendritic cells possessing a unique gene-expression profile, resulting in impairments in subsequent maturation by IFN-gamma and an inability to generate effective antigen-specific CD4+ and CD8+ T cell responses compared to standard moDCs. Monocytes differentiated in the presence of low levels of IFN-gamma downregulate IFN-gamma receptor expression, impairing their response to an inflammatory rechallenge. These findings demonstrate the ability of IFN-gamma to impart differential programs on human moDCs which shape the antigen-specific T cell responses they induce. Timing and intensity of exposure to IFN-gamma can thus determine whether moDCs are tolerogenic or immunostimulating. Human monocyte-derived dendritic cells from 4 healthy donors were differentiated with either GM-CSF and IL-4 (n=4) or GM-CSF, IL-4, and IFN-gamma (n=4). These samples were subsequently hybridized to arrays as 4 biological repeats for each of the two treatment conditions.

2014-06-01 | E-GEOD-47621 | biostudies-arrayexpress

The miR-424(322)/503 gene cluster regulates pro- vs anti-inflammatory skin DC subset differentiation by modulating TGF-βsignaling

Project description:TGF-β family ligands are key regulators of dendritic cell (DC) differentiation and activation. Epidermal Langerhans cells (LCs) require TGF-β family signaling for their differentiation and canonical TGF-β1 signaling secures a non-activated LC state. LCs reportedly control skin inflammation and are replenished from peripheral blood monocytes, which also give rise to pro-inflammatory monocyte-derived DCs (moDCs). By studying mechanisms in inflammation, we previously screened LCs vs moDCs for differentially expressed miRNAs. miR-424/503 was the most strongly inversely regulated (moDCs > LCs). We found that miR-424/503 is induced during moDC differentiation and promotes moDC differentiation in human and mouse. Inversely, forced repression of miR-424 during moDC differentiation facilitated TGF-β1-dependent LC differentiation. Mechanistically, miR-424/503 deficiency in monocyte/DC precursors leads to the induction of TGF-β1-response genes critical for LC differentiation. Therefore, the miR-424/503 gene cluster plays a decisive role in anti-inflammatory LC vs pro-inflammatory moDC differentiation from monocytes.

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Next Generation Sequencing unveils the difference between human TR3-56 cells from healthy and T1D subjects

Project description:Purpose: The goal of this study was the transcriptome high-throughput data analysis of TR3-56 cells isolated from peripheral blood of healthy and T1D subjects Methods: total RNA profile of human TR3-56 cells from healthy and T1D subjects (1. Healthy Subject, 2.Healthy Subject, 3.Healthy Subject; 4. T1D subject, 5. T1D subject, 6. T1D subject; deeep sequencing, using Ovation SoLo RNA-seq Library Preparation KIt (NuGen), Library were prepared for sequencing on NextSeq 500 (llumina technology) Results: Principal component analysis and unsupervised clustering showed that TR3-56 cells from healthy donors are transcriptionally different from TR3-56 cells isolated from T1D subjects. Conclusions: Several genes are differently regulated between TR3-56 cells from T1D and healthy donors.

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Transcriptome profiling of dendritic cells during JEV infection

Project description:Characterization of transcriptional signature of innate immune response and metabolic pathways in monocytes derived dendritic cells (MoDCs) of healthy donors during JEV infection.

2021-07-07 | GSE160178 | GEO

Human lupus netting neutrophils induce endothelial damage, infiltrate tissues and expose immunostimulatory molecules

Project description:Our group has proposed that low-density granulocytes (LDGs) play an important role in lupus pathogenesis, as they can damage endothelial cells and synthesize increased levels of proinflammatory cytokines and type I interferons. LDGs have a heightened capacity to synthesize neutrophil extracellular traps (NETs). NETs from LDGs display increased levels of bactericidal and immunostimulatory proteins, such as the cathelicidin LL37 and externalize double-stranded DNA (dsDNA). Lupus netting LDGs have increased capacity to kill endothelial cells and expose IL-17. Through NETosis, lupus neutrophils stimulate plasmacytoid DCs to synthesize IFN-?. Our results further expand the potential pathogenic role of aberrant lupus neutrophils through a NET-mediated effect. We used microarrays to analyze the gene expression of neutrophils in healthy and lupus patients, and of low-density granulocytes in lupus patients. Human neutrophils and LDGs were isolated from PBMCs. RNA from healthy neutrophils, lupus neutrophils and lupus LDGs was extracted and processed for hybridization on Affymetrix microarrays.

2011-06-22 | E-GEOD-26975 | biostudies-arrayexpress

RNA-Seq to investigate the effect of small molecular compounds on the maturation capacity of monocyte-derived dendritic cells

Project description:Modulating beta-catenin signaling has attractive therapeutic potential in cancer immunotherapy. Various studies have found that beta-catenin can mediate immune evasion in cancer and promote anti-inflammatory features of antigen-presenting dendritic cells. Multiple small-molecule compounds that inhibit Wnt/beta-catenin signaling are currently in clinical development, but none have reached routine clinical use. Thus, new inhibitors of beta-catenin signaling are desirable. This dataset is the result of an investigation of the effect of small molecular compounds axitinib, ICG-001, nitazoxanide, orlistat, and XAV-939 on the maturation capacity of monocyte-derived dendritic cells (moDC). Treatment of immature moDC was done in combination with the beta-catenin activator 6-BIO. Immature moDCs were obtained by isolating monocytes from PBMC using magnetic beads, which were then differentiated into moDCs using GM-CSF and IL-4 for four days. Compounds were added during the maturation of the moDCs, which was done by adding LPS to the cell culture. After the maturation period of 24 hours, the mature moDCs were collected and processed for RNA sequencing.

2021-08-06 | E-MTAB-10757 | biostudies-arrayexpress

Characterization of neutrophil extracellular trap-associated RNA, a novel DAMP acting in concert with the antimicrobial peptide LL37 as intentional but self-limiting drivers of inflammation

Project description:Neutrophil extracellular traps (NETs) are a key antimicrobial feature of cellular innate immunity mediated by polymorphonuclear neutrophils (PMNs). NETs trap and kill microbes but have also been linked to inflammation in atherosclerosis, arthritis, or psoriasis by unknown mechanisms. We here report that NET-associated RNA (naRNA, which was RNA-sequenced from human primary neutrophil NETs here) stimulated further NET formation in naïve PMNs via a unique TLR8-NLRP3-caspase-1-gasdermin D-dependent inflammasome pathway. Keratinocytes also responded to naRNA with expression of psoriasis-related genes (e.g. IL17, IL36) via atypical NOD2-RIPK signaling. In vivo naRNA drove skin inflammation, which was drastically ameliorated by genetic ablation of RNA sensing. The naRNA-LL37 ‘composite DAMP’ was pre-stored in resting neutrophil granules, defining sterile NETs as intentionally inflammatory webs that amplify neutrophil activation. However, the activity of the naRNA-LL37 DAMP was transient and hence supposedly self-limiting under physiological conditions. Only upon dysregulated NET release like psoriasis, TLR-NLRP3-mediated naRNA sensing may represent both potential cause of disease and new intervention target.

2024-05-06 | GSE253440 | GEO

Data in support of Circulating neutrophil extracellular trap components including cell-free DNA are associated with neonatal sepsis and necrotizing enterocolitis in newborn, immature infants, pigs and mice

Project description:Preterm infants are highly susceptible to late-onset sepsis (LOS) and necrotizing enterocolitis (NEC) but specific biomarkers for diagnosis and effective treatment are lacking. Neutrophil extracellular traps (NETs) are related to sepsis in adults but not investigated in infant conditions. This is the first proteome study to document that circulating NETs are involved in neonatal LOS and NEC. cfDNA and NET proteins may provide new potential diagnostic markers for these diseases.

2018-03-05 | PXD004082 | Pride

Neutrophil extracellular traps mediate articular cartilage damage and enhance the immunogenicity of cartilage components in rheumatoid arthritis

Project description:This study invesigates the effects of neutrophil extracellular traps (NETs) on articular cartilage degredation and resulting autoimmune responses in rheumatoid arthritis.

2020-08-10 | GSE150466 | GEO

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