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STAT4 increases the phenotypic and functional heterogeneity of tissue-resident memory T cells

ABSTRACT: We identified STAT4 as a regulator of tissue-resident memory T cell differentiation after infection. Single cell RNA sequencing was used to define the heterogeneity in gene expression among T cells in the lamina proprian and more clearly identify populations that are lost in a STAT4-deficient setting.

ORGANISM(S): Mus musculus

PROVIDER: GSE185545 | GEO | 2023/04/05

REPOSITORIES: GEO

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STAT4 increases the phenotypic and functional heterogeneity of tissue-resident memory T cells

Project description:STAT4 increases the phenotypic and functional heterogeneity of tissue-resident memory T cells

| PRJNA769589 | ENA

Assessing chromatin accessibility in WT and STAT4-/- ILC1s

Project description:STAT4 dynamically interacts with the genomic landscape and functions in modulating chromatin accessibility to influence gene expression. We aimed to evaluate the impact of STAT4 on chromatin accessibility of colonic lamina propria ILC1s. To address this aim, we sorted ILC1s from the colonic LP of unmanipulated C57BL/6 and STAT4-/- mice and performed the assay for transposase-accessible chromatin using sequencing (ATAC-seq).

2019-06-17 | GSE132769 | GEO

STAT4 activation by leukemia inhibitory factor confers a therapeutic effect on intestinal inflammation [RNA-Seq]

Project description:We report that microbiota dysregulation promotes LIF secretion by intestinal epithelial cells (IECs) in a mouse colitis model. LIF greatly activates STAT4 phosphorylation on multiple SPXX elements within the C-terminal transcription regulation domain. STAT4 and STAT3 act reciprocally on both canonical cis-inducible elements (SIEs) and noncanonical “AGG” elements at different loci. In lamina propria lymphocytes (LPLs), STAT4 activation by LIF blocks STAT3-dependent Il-17a/Il-17f promoter activation, whereas in IECs, LIF bypasses the extraordinarily low level of STAT4 to induce YAP gene expression via STAT3 activation. In addition, we found that the administration of LIF is sufficient to restore microbiome homeostasis. Thus, LIF effectively inhibits Th17 accumulation and promotes repair of damaged intestinal epithelium in inflamed colon, and serves as a potential therapy for IBD.

2019-12-18 | GSE124077 | GEO

Targeting HDAC6-Mediated Deacetylation of STAT4 Is Critical for T helper Type 1 Cell Differentiation and Capability

Project description:We report that inhibition and knockout of HDAC6 enhanced Th1 cell differentiation, and decreased Listeria monocytogenes infection in mice. Mechanistically, HDAC6 directly deacetylated CBP-catalyzed acetylation on STAT4 lysine 667 via its enzymatic activity, which is required for IL-12-induced phosphorylation on STAT4. Stat4K667R mutant mice lost the ability to normally differentiate Th1 cell and developed sever L. monocytogenes infection. Our study identifies the STAT4 acetylation on K667 modified dynamically by CBP and HDAC6, as an essential signaling event for Th1 cell differentiation and defense of intracellular pathogen infections, highlighting the therapeutic potential of HDAC6 inhibition for controlling intracellular pathogen infections.

2022-12-15 | GSE146253 | GEO

STAT4 activation by leukemia inhibitory factor confers a therapeutic effect on intestinal inflammation [array]

Project description:T helper 17 (Th17) cell differentiation triggered by interleukin-6 (IL-6) via STAT3 activation promotes inflammation in inflammatory bowel disease (IBD) patients. However, leukemia inhibitory factor (LIF), an IL-6 family cytokine, restricts inflammation by blocking Th17 cell differentiation via an unknown mechanism. Here, we report that microbiota dysregulation promotes LIF secretion by intestinal epithelial cells (IECs) in a mouse colitis model. LIF greatly activates STAT4 phosphorylation on multiple SPXX elements within the C-terminal transcription regulation domain. STAT4 and STAT3 act reciprocally on both canonical cis-inducible elements (SIEs) and noncanonical “AGG” elements at different loci. In lamina propria lymphocytes (LPLs), STAT4 activation by LIF blocks STAT3-dependent Il-17a/Il-17f promoter activation, whereas in IECs, LIF bypasses the extraordinarily low level of STAT4 to induce YAP gene expression via STAT3 activation. In addition, we found that the administration of LIF is sufficient to restore microbiome homeostasis. Thus, LIF effectively inhibits Th17 accumulation and promotes repair of damaged intestinal epithelium in inflamed colon, and serves as a potential therapy for IBD.

2019-12-18 | GSE124078 | GEO

STAT4 ChIP-on-chip in IL12-Mediated T Helper 1 Cell Differentiation

Project description:The Signal Transducer and Activator of Transcription factor STAT4 is a critical component in the development of inflammatory adaptive immune responses. It has been extensively characterized as a lineage-determining factor in Th1 development. However, the genetic program activated by STAT4 that results in an inflammatory cell type is not well defined. In this report we use DNA isolated from STAT4-chromatin immunoprecipitation to perform ChIP-on-chip analysis of over 28,000 mouse gene promoters to identify STAT4 targets. We demonstrate that STAT4 binds multiple gene-sets that program distinct components of the Th1 lineage. While many STAT4 target genes display STAT4-dependent IL-12-inducible expression, other genes displayed IL-12-induced histone modifications but lack induction, possibly due to high relative basal expression. In the subset of genes that STAT4 programs for expression in Th1 cells, IL-12-induced mRNA levels remain increased for a longer time than mRNA from genes that are not programmed. This suggests that STAT4 binding to target genes, while critical, is not the only determinant for STAT4-dependent gene programming during Th1 differentiation. The supplementary bed file contains all 7504 Stat4 binding sites reported in the supplementary Analysis_results.xls Excel file.

2009-06-26 | GSE16845 | GEO

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

Regulating type 1 IFN effects in CD8 T cells during viral infections: changing STAT4 and STAT1 expression for function

Project description:Type 1 IFNs can conditionally activate all of the signal transducers and activators of transcription molecules (STATs), including STAT4. The best-characterized signaling pathways use STAT1, however, and type 1 IFN inhibition of cell proliferation is STAT1 dependent. We report that type 1 IFNs can basally stimulate STAT1- and STAT4- dependent effects in CD8 T cells, but that CD8 T cells responding to infections of mice with lymphocytic choriomenigitis virus have elevated STAT4 and lower STAT1 expression with significant consequences for modifying the effects of type 1 IFN exposure. The phenotype was associated with preferential type 1 IFN activation of STAT4 as compared to STAT1. Stimulation through the TCR induced elevated STAT4 expression, and STAT4 was required for peak expansion of antigen-specific CD8 T cells, low STAT1 levels, and resistance to type 1 IFN-mediated inhibition of proliferation. Thus, a mechanism is discovered for regulating the consequences of type 1 IFN exposure in CD8 T cells, with STAT4 acting as a key molecule in driving optimal antigen-specific responses and overcoming STAT1-dependent inhibition of proliferation. CD8 T cells were purified from uninfected WT, STAT1-deficient and STAT4-deficient mice or from D8 LCMV-infected WT mice and either control treated or treated with 1x104 U mouse IFNalpha for 90 minutes.

2012-09-07 | E-GEOD-40666 | biostudies-arrayexpress

Title: An IL-23-STAT4 Axis Regulates Classical Dendritic Cell Expansion and Function in Experimental Autoimmune Encephalomyelitis

Project description:The signal transducer and activator of transcription 4 (STAT4) promotes protective immunity and autoimmunity downstream of pro-inflammatory cytokines including IL-12 and IL-23. In experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS), Stat4-/- mice are resistant to the development of inflammation and paralysis. Here, we examined cell-type requirements and found that in addition to T cells, STAT4 is required in dendritic cells for development of EAE. Deficiency of STAT4 in CD11c-expressing cells resulted in decreased T cell priming and inflammation in the CNS. EAE susceptibility was recovered following adoptive transfer of wild type bone marrow-derived DC to mice with STAT4-deficient DCs, but not adoptive transfer of STAT4- or IL-23R-deficient DCs. Single cell RNA-seq identified STAT4-dependent genes in DC subsets that paralleled a signature in MS patient DCs. Together, these data define a novel IL-23/DC/STAT4 pathway in DCs that could be a key to novel therapeutic targets in MS.

2024-07-17 | GSE243202 | GEO

STAT4 promotes Bhlhe40 induction to drive protective IFN-g from natural killer cells during viral infection [STAT4 CUT&RUN]

Project description:NK cells represent a cellular component of the mammalian innate immune system, and mount rapid responses against viral infection, including the secretion of the potent anti-viral effector cytokine IFN-g. Following mouse cytomegalovirus (MCMV) infection, Bhlhe40 was the most highly induced transcription factor in NK cells among the basic helix-loop-helix family. Bhlhe40 upregulation in NK cells depended upon IL-12 and IL-18 signals, with the promoter of Bhlhe40 enriched for STAT4 and the permissive histone H3K4me3, and STAT4-deficient NK cells showing an impairment of Bhlhe40 induction and diminished H3K4me3. Transcriptomic and protein analysis of Bhlhe40-deficient NK cells revealed a defect in IFN-g production during MCMV infection, resulting in diminished protective immunity following viral challenge. Finally, we provide evidence that Bhlhe40 directly promotes IFN-g by binding throughout the Ifng loci in activated NK cells. Thus, our study reveals how STAT4-mediated control of Bhlhe40 drives protective IFN-g secretion by NK cells during viral infection.

2023-09-13 | GSE242911 | GEO

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