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Genome-wide profiling of target genes for the systemic lupus erythematosus-associated transcription factors IRF5 and STAT4

ABSTRACT: IRF5 and STAT4 are strongly associated with human systemic lupus erythematosus (SLE). By performing chromatin immunoprecipitation-sequencing (ChIP-Seq) in human peripheral blood mononuclear cells (PBMCs), we identified more than 7000 target genes for IRF5 and STAT4 in stimulated PBMCs. Contrarily, without stimulation IRF5 seemed to be inactive, and STAT4 only showed low levels of transcriptional regulatory activity.

ORGANISM(S): Homo sapiens

PROVIDER: GSE38567 | GEO | 2012/06/08

SECONDARY ACCESSION(S): PRJNA168219

REPOSITORIES: GEO

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Genome-wide profiling of target genes for the systemic lupus erythematosus-associated transcription factors IRF5 and STAT4

Project description:IRF5 and STAT4 are strongly associated with human systemic lupus erythematosus (SLE). By performing chromatin immunoprecipitation-sequencing (ChIP-Seq) in human peripheral blood mononuclear cells (PBMCs), we identified more than 7000 target genes for IRF5 and STAT4 in stimulated PBMCs. Contrarily, without stimulation IRF5 seemed to be inactive, and STAT4 only showed low levels of transcriptional regulatory activity. Target genes of IRF5 and STAT4 were identified in human PBMCs with or without stimulation using ChIP-Seq.

2012-06-08 | E-GEOD-38567 | biostudies-arrayexpress

Transcriptome analysis of peripheral blood from Lyn-deficient mouse SLE model lacking Ifnar1 or Irf5

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RNA-sequencing of IRF5+ and IRF5- circulating monocytes from patients with Type-2 Diabetes

Project description:Purpose: To characterise the transcriptomic landscape in monocytes associated with IRF5 expression Methods: RNA sequencing from FACS sorted IRF5+ and IRF5- CD14+ monocytes Results: Differential expression based on IRF5 postiivity provides insight into its roles in monocyte function and in type-2 diabetes Conclusions: This study represents the first analyses of IRF5-dependent transcriptome in circulating monocytes from patients with Type-2 diabetes

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Expression analysis of murine splenic B-cells after retroviral transduction with a constitutively active variant of IRF5 (IRF5-4D)

Project description:Genome-wide gene expression analysis of murine splenic B-cells following retroviral transduction with a constitutively active IRF5 (IRF5-4D) Illumina WG-6 v2.0 arrays were hybridized to determine the gene expression profile of murine splenic B-cells following retroviral transduction with i) control virus (MSCV-IRES-CFP) or ii) IRF5-4D virus (MSCV-IRF5-4D-CFP). All hybridizations were done in biological triplicates.

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Expression analysis of murine splenic B-cells after retroviral transduction with a constitutively active variant of IRF5 (IRF5-4D)

Project description:Genome-wide gene expression analysis of murine splenic B-cells following retroviral transduction with a constitutively active IRF5 (IRF5-4D)

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TASL is the SLC15A4-associated adaptor for IRF5 activation by TLR7–9

Project description:Toll-like receptors (TLRs) have a crucial role in the recognition of pathogens and initiation of immune responses. Here we show that a previously uncharacterized protein encoded by CXorf21—a gene that is associated with systemic lupus erythematosus—interacts with the endolysosomal transporter SLC15A4, an essential but poorly understood component of the endolysosomal TLR machinery also linked to autoimmune disease. Loss of this type-I-interferon-inducible protein, which we refer to as ‘TLR adaptor interacting with SLC15A4 on the lysosome’ (TASL), abrogated responses to endolysosomal TLR agonists in both primary and transformed human immune cells. Deletion of SLC15A4 or TASL specifically impaired the activation of the IRF pathway without affecting NF-κB and MAPK signalling, which indicates that ligand recognition and TLR engagement in the endolysosome occurred normally. Extensive mutagenesis of TASL demonstrated that its localization and function relies on the interaction with SLC15A4. TASL contains a conserved pLxIS motif (in which p denotes a hydrophilic residue and x denotes any residue) that mediates the recruitment and activation of IRF5. This finding shows that TASL is an innate immune adaptor for TLR7, TLR8 and TLR9 signalling, revealing a clear mechanistic analogy with the IRF3 adaptors STING, MAVS and TRIF. The identification of TASL as the component that links endolysosomal TLRs to the IRF5 transcription factor via SLC15A4 provides a mechanistic explanation for the involvement of these proteins in systemic lupus erythematosus.

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