Human and murine studies showed that granulocyte macrophage colony-stimulating factor (GM-CSF) exerts beneficial effects in intestinal inflammation. To explore whether GM-CSF mediates its effects via monocytes, we analyzed effects of GM-CSF on monocytes in vitro and assessed the immunomodulatory potential of GM-CSF-activated monocytes (GMaM). We used microarray technology and functional assays to characterize GMaM in vitro and used a mouse model of colitis to study GMaM functions in vivo.
Reprogramming of monocytes by GM-CSF contributes to regulatory immune functions during intestinal inflammation.
Specimen part
View SamplesSulforaphane (SFN), an isothiocyanate, is part of an important group of naturally occurring small molecules with antiinflammatory properties. Even though the published reports are vague, most are best conceivable with an inhibition of T cell functions. We therefore analyzed the effect of SFN on T cell-mediated autoimmune disease. Feeding mice with SFN protected from severe experimental autoimmune encephalomyelitis (EAE). Disease amelioration was associated with reduced interleukin (IL)-17 and IFN-gamma expression in draining lymph nodes. In vitro, SFN treatment of T cells did not directly alter T cell cytokine secretion. In contrast, SFN treatment of dendritic cells (DC) inhibited TLR4-induced IL-12 and IL-23 production and the cytokine profile of T cells stimulated by SFN-treated DC. SFN suppressed TLR4-induced nuclear factor kappa B (NFB) activity, without affecting the degradation of its inhibitor (IB). Instead, SFN treatment of DC resulted in strong expression of the stress response protein heme oxygenase-1 (HO-1), which interacts with NFB p65 and inhibits its activity. Consistent with these findings, HO-1 bound to p65 and subsequently inhibited the p65 promoter activity within the IL23a and IL12b promoter region. Importantly, SFN suppressed Il23a and Il12b expression in vivo and silenced Th17/Th1 responses within the CNS . Our data show that SFN improves Th17/Th1-mediated autoimmune disease by inducing HO-1 and inhibiting p65-regulated IL-23 and IL-12 expression.
Sulforaphane protects from T cell-mediated autoimmune disease by inhibition of IL-23 and IL-12 in dendritic cells.
Specimen part, Treatment
View SamplesMultiple sclerosis is a chronic inflammatory demyelinating disease of the central nervous system with marked heterogeneity in several aspects including pathological processes. Four histopathological patterns of MS have been described. Pattern II is characterized by infiltrating macrophages and T-cells and by antibody and complement deposition. Transcriptome analysis of three patern II demyelinating brain lesions from a multiple sclerosis patient using RNA sequencing demonstrated the presence of mRNA transcripts for genes specific of activated macrophages, T and B cells as well as genes coding for immunoglobulins, complement proteins and some pattern II associated proteins, providing additional evidence supporting pattern II demyelination. Overall design: Examination of 3 different demyelinating lesions identified by Immunohistopathology.
Central role of Th2/Tc2 lymphocytes in pattern II multiple sclerosis lesions.
No sample metadata fields
View SamplesPurpose: Next-generation sequencing (NGS) has revolutionized systems-based analysis of cellular pathways. The goal of this study is to compare the transcriptome of OT-1 cells during priming (3 days after infection) and during effector phase ( 7 days after infection) in ODC-OVA mice after LCMV-OVA and Lm-OVA infection Overall design: OT-1 mRNA profiles of 7-weeks old ODC-OVA mice adoptively transfered with 10^5 OT-1 CD45.1 cells 3 and 7 days after i.v. infection with LCMV-OVA and Lm-OVA (deep sequencing, in triplicate, using Illumina).
Expression of the DNA-Binding Factor TOX Promotes the Encephalitogenic Potential of Microbe-Induced Autoreactive CD8<sup>+</sup> T Cells.
Cell line, Subject
View SamplesPurpose: Next-generation sequencing (NGS) has revolutionized systems-based analysis of cellular pathways. The goal of this study is to compare the transcriptome of CNS-infiltrating OT-1 WT and Tox-deficient cells during effector phase (7 days after infection with LCMV-OVA) Overall design: OT-1 mRNA profiles of 7-weeks old ODC-OVA mice adoptively transfered with 10^5 OT-1 CD45.1 cells (WT and Tox-deficient) 7 days after i.v. infection with LCMV-OVA (deep sequencing, in triplicate, using Illumina).
Expression of the DNA-Binding Factor TOX Promotes the Encephalitogenic Potential of Microbe-Induced Autoreactive CD8<sup>+</sup> T Cells.
Cell line, Subject
View SamplesArgonaute (Ago) proteins, which act in post-transcriptional gene regulation directed by small RNAs, are vital for normal stem cell biology. Here we report the genomic characterization of stable Ago-deficient mouse embryonic stem cells (mESC) and determine the direct, primary and system level response to loss of Ago-mediated regulation. We find mESCs lacking all four Ago proteins are viable, do not repress microRNA (miRNA)-targeted cellular RNAs, and show distinctive gene network signatures. Profiling of RNA expression and epigenetic activity in an Ago mutant genetic series indicates that early responses to Ago loss are driven by transcriptional regulatory networks, in particular the Tgf-ß/Smad transcriptional network. This finding is confirmed using a time course analysis of Ago depletion and Ago rescue experiments. Detailed analysis places Tgf-ß/Smad activation upstream of cell cycle regulator activation, such as Cdkn1a, and repression of the c-Myc transcriptional network. The Tgf-ß/Smad pathway is directly controlled by multiple low-affinity miRNA interactions with Tgf-ß/Activin receptor mRNAs and receptor-mediated activation is required for Tgf-ß/Smad target induction with Ago loss. Our characterization reveals the interplay of post-transcriptional regulatory pathways with transcriptional networks in maintaining cell state and likely coordinating cell state transitions. Overall design: mRNA seq from stable genetic Dicer and Dgcr8 mutant mouse embryonic stem cells.
Temporal Control of the TGF-β Signaling Network by Mouse ESC MicroRNA Targets of Different Affinities.
Specimen part, Cell line, Subject
View SamplesBy using high-density DNA microarrays, we analyzed the gene-expression profile of SHSY5Y neuroblastoma cells after treatment with cobalt chloride
Investigation of Endogenous Retrovirus Sequences in the Neighborhood of Genes Up-regulated in a Neuroblastoma Model after Treatment with Hypoxia-Mimetic Cobalt Chloride.
Specimen part, Cell line
View SamplesPrimary human macrophages with a HIF-1alpha or HIF-2alpha knockdown were pretreated with IL-10 for 16h and afterwards for 4h additionaly under hypoxi (1% O2), RNA was isolated usind the Qiagen RNAeasy Kit and cDNA synthesis wos done using Ambion WT Expression Kit. Expression was compared to si control under control conditions.
Genome-wide identification of hypoxia-inducible factor-1 and -2 binding sites in hypoxic human macrophages alternatively activated by IL-10.
Specimen part
View SamplesThe goal of the experiment was to assay the role of the glucocorticoid receptor (GR) in development of mesenchynmal cells of the lung occuring between the 16 and 18 day of embryonal development.
Glucocorticoid activity during lung maturation is essential in mesenchymal and less in alveolar epithelial cells.
Specimen part
View SamplesAnalysis of newborn mouse epidermis lacking the expression of Insulin receptor (IR) and Insulin like growth factor 1 receptor (IGF-1R). Results show that IR/IGF-1R signalling control epidermal morphogenesis.
Insulin/IGF-1 controls epidermal morphogenesis via regulation of FoxO-mediated p63 inhibition.
No sample metadata fields
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