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Time course experiment of dendritic cells exposed to curdlan

ABSTRACT: Human monocyte derived dendritic cells were exposed to the pure Dectin-1 agonist Curdlan to analyze the early transcriptional activation of DCs. This experiment is related to E-MTAB-750.

ORGANISM(S): Homo sapiens

SUBMITTER: Luca Beltrame

PROVIDER: E-MTAB-1213 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

The modular nature of dendritic cell responses to commensal and pathogenic fungi.

Rizzetto Lisa L Buschow Sonja I SI Beltrame Luca L Figdor Carl G CG Schierer Stephan S Schuler Gerold G Cavalieri Duccio D

PloS one 20120803 8

The type of adaptive immune response following host-fungi interaction is largely determined at the level of the antigen-presenting cells, and in particular by dendritic cells (DCs). The extent to which transcriptional regulatory events determine the decision making process in DCs is still an open question. By applying the highly structured DC-ATLAS pathways to analyze DC responses, we classified the various stimuli by revealing the modular nature of the different transcriptional programs governi ...[more]

PMID: 22879980

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Stimulation of dendritic cells with cell wall components

Project description:In order to dissect the response from different fungal cell wall components, monocyte-derived dendritic cells obtained from healthy donors were collected and either left untreated, or treated for four hours with either mannan, zymosan, curdlan, whole yeast, or yeast spores. This experiment is related to E-MTAB-1213.

2012-08-28 | E-MTAB-750 | biostudies-arrayexpress

Synergism between curdlan and GM-CSF in mouse dendritic cells

Project description:A simultaneous engagement of different pathogen recognition receptors provides a tailor made adaptive immunity for an efficient defence against distinct pathogens. For example, cross talk of TLR and c-type lectin signalling effectively shapes distinct gene expression patterns by integrating the signals at the level of NF-κB. Here, we extend this principle to a strong synergism between the Dectin-1 agonist, curdlan, and an inflammatory growth factor, GM-CSF. Both together act in synergy in inducing a strong inflammatory signature which converts immature DCs to potent effector DCs. A variety of cytokines (IL-1β, IL-6, TNF-α, IL-2 and IL-12p70), costimulatory molecules (CD80, CD86, CD40 and CD70), chemokines (CxCl1, CxCl2, CxCl3, CCl12, CCl17) as well as receptors and molecules involved in fugal recognition and immunity such as Mincle, Dectin-1, Dectin-2 and Pentraxin 3 are strongly up-regulated in DC treated simultaneously with curdlan and GM-CSF. The synergistic effect of both stimuli resulted in strong IKBα phosphorylation, in its rapid degradation and in enhanced nuclear translocation of all NF-κB subunits. We further identified MAPK ERK, as one possible integration site of both signals, since its phosphorylation was clearly augmented when curdlan was co-applied with GM-CSF. Our data demonstrate that the immunomodulatory activity of curdlan requires an additional signal provided by GM-CSF to successfully initiate a robust β-glucan specific cytokine and chemokine response. The integration of both signals clearly prime and tailor a more effective innate and adaptive response against invading microbes and fungi. CD11b+ fraction of FLT3L generated BM DCs (3-4 x106) were stimulated for 4 hours with 100 or 1 μg/ml curdlan in presence or absence of 5 ng/ml GM-CSF in triplicates.

2011-10-14 | E-GEOD-32986 | biostudies-arrayexpress

Gene expression profiling of dectin-1 and NFAT responsive genes in dendritic cells

Project description:This study provides the dectin-1 and NFAT responsive genes for 2h and 4h of curdlan treatment. Affymetrix Mouse Gene 1.0ST Arrays were used to profile gene expression in curdlan-stimulated D1 cells (2h or 4h exposure) that had been treated or not with FK506 for the duration of culture. Dendritic cell line D1 was treated with curdlan for 2h and 4h, and curdlan + Fk506 for 2h and 4h in three replicate.

2015-02-04 | E-GEOD-59896 | biostudies-arrayexpress

Transcription profiling of human monocyte-derived dendritic cells exposed to pathogenic and harmless fungi

Project description:To ditinguish different immune response and investigate the rule of proper recognition of fungi, a transcriptional analysis on moDCs exposed to a pathogenic and a harmless fungi was performed. Monocyte-derived dendritic cells were treated with Candida albicans, two different forms of Saccaromyces cerevisiae (whole organism and spore ascum) or untreated.

2010-03-22 | E-MTAB-135 | biostudies-arrayexpress

Microarray analysis of CurDC versus BMDC

Project description:We found that dendritic cells (DCs) activated by dectin-1 agonists Curdlan potently promoted naïve CD4+ T cells to differentiate into Th9 cells. To clarify the underlying mechanisms, we examine the gene expression profiles of Curdlan-activated DCs (CurDCs) and regular DCs matured by TNFalpha and IL1beta. We identified 42 upregulated genes of cytokines, chemokines and costimulatory molecules, especially the TNF/Receptor members. Subsequent studies proved that the TNF family members TNFSF15 and OX40L play a major role in mediating CurDC-induced Th9 differentiation.

2016-05-05 | GSE81111 | GEO

Dendritic cell-derived IL-2 promotes apoptosis of terminally mature cells via a novel autocrine signaling pathway

Project description:Dendritic cells (DCs) are crucial for sensing pathogens and triggering immune response. GM-CSF myeloid dendritic cells (GM-DCs) secrete several cytokines including IL-2 upon activation by pathogen associated molecular pattern (PAMP) ligands. DC IL-2 has been shown to be important for innate and adaptive immune responses, however its importance in DC physiology has never been demonstrated. This is due to ambiguity in expression of the CD122 subunit of the IL-2 trimeric receptor complex crucial for signaling. We show here that autocrine IL-2 signaling is functional in GM-DCs in early time window of stimulation with PAMPs. IL-2 signaling selectively activates the JAK/STAT5 pathway by assembling holo-receptor complexs at the cell surface. Autocrine IL-2 signaling inhibits survival of PAMP matured GM-DCs which is crucial for maintaining immune tolerance and preventing autoimmunity. Our findings suggest immune regulation by a novel autocrine signaling pathway that can potentially be exploited in DC immunotherapy. Microarray technology was used to understand the role of IL-2 signaling in DC. Microarray was performed to investigate the role of IL-2 signaling in DC physiology. Hence Wt or IL-2-/- BMDCs were either treated or not with curdlan for 6h and taken for microarray.

2015-05-21 | E-GEOD-58120 | biostudies-arrayexpress

Transcription profiling by array of human dendritic cells exposed to mesenchymal stem cells

Project description:All experiments are performed on human dendritic cells (DCs) differentiated in GM-CSF and IL-4 from CD14+ cells and bone marrow mesenchimal stem cells (MSCs). We found that MSCs impair active immune synapse formation and we evidenced at electron microscopy two types of contact between MSCs and DCs: gap and adherent junctions. In the same experiments we show that MSC contacts induce a reorganization of DC cytoskeleton by the formation of actin podosomes, structures typical of an immature, tolerogenic state of DCs. These results suggest that MSCs exert a tolerogenic effect on DCs by mechanism mediated by cell-cell contact. This induces DC cytoskeleton reorganization with formation of actin podosomes.

2010-12-31 | E-MTAB-286 | biostudies-arrayexpress

Synergism between curdlan and GM-CSF in mouse dendritic cells

2011-10-15 | GSE32986 | GEO

Genome-wide analysis of the CARD9/Dectin-1 transcriptional program in neutrophils and macrophages by RNA-seq

Project description:Purpose: To characterize Card9-dependent and Card9-independent Dectin-1 mediated gene expression changes in neutrophils and to compare response to Dectin-1 stimulation in neutrophils and macrophages. Method: BM neutrophils from WT and Card9-/- mice were isolated by MACS column purification and treated with or without the Dectin-1 agonist, curdlan for 3 hrs. WT BM-derived macrophages were also treated with or without curdlan for 3hrs before sample collection. Results: We identified both Card9-dependent and Card9-independent gene expression changes with Dectin-1 stimulation in neutrophils. We also identified cell-type specific differences in the response to Dectin-1 stimulation in neutrophils and macrophages. Conclusions: Dectin-1 stimulation induces significant gene expression changes regulated by either canonical Card9-dependent or non-canonical Card9-independent mechanisms.

2021-02-26 | GSE148850 | GEO

Dectin-1-mediated signaling leads to characteristic gene expressions in rat mast cells

Project description:Rat mast cell line RBL-2H3 was analyzed to investigate the molecular mechanism of Dectin-1-mediated activation and responses of mast cells. Dectin-1-mediated signaling stimulated characteristic gene expression, such as MCP-1, IL-4, IL-13, TNF-αand Nfkbiz. RBL-2H3 cell line stably expressing Dectin-1 was established. Non-stimulated cells (control) compared to Dectin-1-stimulated (Curdlan) cells in order to comfirm Dectin-1-mediated signaling-inducible genes. Dectin-1-stimulated cells compared to Syk inhibitor R406-pretreated cells in order to examine the importance of Syk for Dectin-1-mediated gene up-regulations.

2014-03-27 | E-GEOD-56246 | biostudies-arrayexpress

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