Expression data from mouse dendritic cells
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE28340 | GEO | 2011/04/05
SECONDARY ACCESSION(S): PRJNA139463
REPOSITORIES: GEO
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Project description:Dendritic cells (DCs) are pivotal for both recognition of antigens and control of an array of immune responses by recognizing microbes through distinct pattern recognition receptors (PRRs). The first microbial component to be studied in detail and known to cause septic shock is endotoxin (LPS). DCs recognize LPS via Toll-like receptor TLR-47. LPS causes many changes in the DCs, but the elicitation of cytokine production is perhaps the one with clear biologic relevance. We used microarrays to detail the global programme of gene expression underlying regulation of TLR 4 signaling and identified the upregulated and downregulated genes in response to LPS treatment in mouse dendritic cells. We use microarray to determine the conserved hematopoietic miRNAs to study their potential contribution to regulating many different immunological cellular processes and contexts. To obtain overall gene expression profile, we extracted bone marrow cells from at least 3 mice for each experiment. Purified ( 97~98% purity) mouse dendritic cells, treated with LPS or control diluent, were used for RNA extraction and hybridization on Affymetrix microarrays. To obtain overall miRNA expression profile, we extracted bone marrow cells from at least 3 mice (C57BL/6) for each experiment. Purified ( 97~98% purity for CD11C+ ) mouse dendritic cells were used for RNA extraction and hybridization on Exiqon miRCURY LNATM microRNA array.
2011-04-05 | E-GEOD-28340 | biostudies-arrayexpress
Project description:Dendritic cells (DCs) are a special class of leukocytes able to activate both innate and adaptive immune responses. They interact with microbes through germline-encoded pattern-recognition receptors (PRRs), which recognize molecular patterns expressed by various microorganisms. Upon antigen binding, PRRs instruct DCs for the appropriate priming of natural killer cells, followed by specific T-cell responses. Once completed the effector phase, DCs reach the terminal differentiation stage and eventually die by apoptosis. We have observed that following lipopolysaccharide (LPS)-stimulation the initiation of the apoptotic pathway in DCs is due the activation of NFAT proteins. Indeed, LPS induces Src-family kinase and phospholipase C (PLC)γ2 activation, influx of extracellular Ca2+ and calcineurin-dependent nuclear NFAT translocation. The initiation of this pathway is independent of TLR4 engagement, and dependent exclusively on CD14. According with this observation CD14-deficient DCs do not die following LPS stimulation. Nevertheless, CD14-deficient DC death following LPS activation can be restored by co-stimulating DCs with LPS and thapsigargin. Thapsigargin empties the intracellular calcium stores by blocking calcium pumping into the sarcoplasmic and endoplasmic reticulum and thereby activates plasma membrane calcium channels. This, in turn, allows an influx of calcium into the cytosol and NFAT activation. To identify the NFAT controlled apoptosis genes in LPS activated DCs we have performed a kinetic microarray analysis (0, 48 and 60 h) in conditions allowing or inhibiting NFAT activation. Four genes have been selected: Nur77, Gadd45g, Ddit3/Gadd153/Chop-10 and Tia1. To identify apoptosis genes selectively modulated by NFAT, a comparative kinetic (time points 0, 48 and 60 h) microarray analysis was performed in the following conditions: 1) wild type bone marrow derived DCs (wtBMDCs) stimulated with LPS; 2) CD14-deficient BMDCs stimulated with LPS; 3) wtBMDCs stimulated with LPS in presence of thapsigargin; 4) CD14-deficient BMDCs stimulated with LPS in presence of thapsigargin.
2010-03-03 | E-GEOD-15720 | biostudies-arrayexpress
Project description:Macrophages and dendritic cells (DCs) differently contribute to the generation of coordinated immune system responses against infectious agents. They interact with microbes through germline-encoded pattern-recognition receptors (PRRs), which recognize molecular patterns expressed by various microorganisms. Upon antigen binding, PRRs instruct DCs for the appropriate priming of natural killer cells, followed by specific T-cell responses. Once completed the effector phase, DCs reach the terminal differentiation stage and eventually die by apoptosis. By contrast, following antigen recognition, macrophages initiate first the inflammatory process and then switch to an anti-inflammatory phenotype for the restoration of tissue homeostasis. Following lipopolysaccharide (LPS)-stimulation the initiation of the apoptotic pathway in DCs is due the activation of NFAT proteins. DC stimulation with lipopolysaccharide (LPS) induces Src-family kinase and phospholipase C (PLC)γ2 activation, influx of extracellular Ca2+ and calcineurin-dependent nuclear NFAT translocation. The initiation of this pathway is independent of TLR4 engagement, and dependent exclusively on CD14. We asked whether macrophage survival after LPS encounter was due to their inability to activate the Ca2+ pathway. As matter of fact, bone marrow-derived macrophages were unable to mobilize Ca2+ and to translocate NFAT to the. To further investigate whether the Ca2+-NFAT pathway played any role in LPS-stimulated macrophages, we performed a comparative kinetic microarray analysis in conditions allowing or inhibiting NFAT activation. We show here that no modulation of gene expression can be attributed to NFAT. Gene expression analyses were performed using Affymetrix GeneChips in the following groups of murine macrophaghes: 1) CD14-deficient macrophages stimulated with LPS; 2) wt macrophages stimulated with LPS in presence of EGTA; 3) wt macrophages stimulated with LPS. The following kinetic time points were examined: 0, 6 and 24 hours following LPS activation. This experimental setting allowed us to select for effects due to Ca2+ fluxes and exclude the effects due to other causes, particularly the block of TRIF recruitment in CD14-deficient cells and the EGTA effects unrelated to Ca2+ chelation.
2010-03-04 | E-GEOD-15721 | biostudies-arrayexpress
Project description:Dendritic cells (DCs) are a special class of leukocytes able to activate both innate and adaptive immune responses. They interact with microbes through germline-encoded pattern-recognition receptors (PRRs), which recognize molecular patterns expressed by various microorganisms. Upon antigen binding, PRRs instruct DCs for the appropriate priming of natural killer cells, followed by specific T-cell responses. Once completed the effector phase, DCs reach the terminal differentiation stage and eventually die by apoptosis. We have observed that following lipopolysaccharide (LPS)-stimulation the initiation of the apoptotic pathway in DCs is due the activation of NFAT proteins. Indeed, LPS induces Src-family kinase and phospholipase C (PLC)γ2 activation, influx of extracellular Ca2+ and calcineurin-dependent nuclear NFAT translocation. The initiation of this pathway is independent of TLR4 engagement, and dependent exclusively on CD14. According with this observation CD14-deficient DCs do not die following LPS stimulation. Nevertheless, CD14-deficient DC death following LPS activation can be restored by co-stimulating DCs with LPS and thapsigargin. Thapsigargin empties the intracellular calcium stores by blocking calcium pumping into the sarcoplasmic and endoplasmic reticulum and thereby activates plasma membrane calcium channels. This, in turn, allows an influx of calcium into the cytosol and NFAT activation. To identify the NFAT controlled apoptosis genes in LPS activated DCs we have performed a kinetic microarray analysis (0, 48 and 60 h) in conditions allowing or inhibiting NFAT activation. Four genes have been selected: Nur77, Gadd45g, Ddit3/Gadd153/Chop-10 and Tia1.
2009-06-17 | GSE15720 | GEO
Project description:Macrophages and dendritic cells (DCs) differently contribute to the generation of coordinated immune system responses against infectious agents. They interact with microbes through germline-encoded pattern-recognition receptors (PRRs), which recognize molecular patterns expressed by various microorganisms. Upon antigen binding, PRRs instruct DCs for the appropriate priming of natural killer cells, followed by specific T-cell responses. Once completed the effector phase, DCs reach the terminal differentiation stage and eventually die by apoptosis. By contrast, following antigen recognition, macrophages initiate first the inflammatory process and then switch to an anti-inflammatory phenotype for the restoration of tissue homeostasis. Following lipopolysaccharide (LPS)-stimulation the initiation of the apoptotic pathway in DCs is due the activation of NFAT proteins. DC stimulation with lipopolysaccharide (LPS) induces Src-family kinase and phospholipase C (PLC)γ2 activation, influx of extracellular Ca2+ and calcineurin-dependent nuclear NFAT translocation. The initiation of this pathway is independent of TLR4 engagement, and dependent exclusively on CD14. We asked whether macrophage survival after LPS encounter was due to their inability to activate the Ca2+ pathway. As matter of fact, bone marrow-derived macrophages were unable to mobilize Ca2+ and to translocate NFAT to the. To further investigate whether the Ca2+-NFAT pathway played any role in LPS-stimulated macrophages, we performed a comparative kinetic microarray analysis in conditions allowing or inhibiting NFAT activation. We show here that no modulation of gene expression can be attributed to NFAT.
2009-06-17 | GSE15721 | GEO
Project description:Upon toll-like receptor (TLR) ligation, dendritic cells (DCs) undergo an activation process referred to as maturation. Over the course of maturation, global DC gene expression is severely altered, resulting in phenotypic changes including DC morphology, migration, immune stimulatory and inhibitory receptor expression, cytokine production, etc. We performed microarray analysis to investigate changes in gene expression patterns between wild type and MK2-deleted murine splenic DCs over time (0 - 24 hours) following TLR stimulation by LPS.
2017-11-01 | GSE96628 | GEO
Project description:This study aims at identifying genes that are NIK/NF-kappaB2 responsive in murine dendritic cells matured in vivo. Experiment Overall Design: This study isolated dendritic cells from the spleens of Alymphoplasia or heterozygeous littlermates (wild type). Mice were eiter not treated as a reference or treated I.P. with 25 micrograms of LPS and 100 micrograms of agonistic anti-CD40 antibody. DCs were isolated 6 hours after treatment allowing in vivo maturation via both TLR and CD40 signals. DCs from 3 mice per group were pooled. Experiment was performed in triplicate.
2008-04-06 | E-GEOD-7219 | biostudies-arrayexpress
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