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Chromatin accessibility analysis of MIAT sufficient and MIAT deficient Th17 cells by ATAC-seq

ABSTRACT: T helper 17 (Th17) cells protect against fungal and bacterial infections and are implicated in autoimmunity. Several long intergenic noncoding RNAs (lincRNA) are induced during Th17 differentiation, however, their contribution to Th17 differentiation is poorly understood. We discovered a lincRNA myocardial infarction associated transcript (MIAT) to be upregulated early after induction of human Th17 cell differentiation along with an increase in the chromatin accessibility at the gene locus. We found that MIAT deficiency leads to chromatin accessibility at several loci including IL17A promoter.

ORGANISM(S): Homo sapiens

PROVIDER: GSE183918 | GEO | 2022/05/25

REPOSITORIES: GEO

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Long Intergenic Noncoding RNA MIAT Contributes to Human Th17 Cell Differentiation

Project description:T helper 17 (Th17) cells protect against fungal and bacterial infections and are implicated in autoimmunity. Several long intergenic noncoding RNAs (lincRNA) are induced during Th17 differentiation, however, their contribution to Th17 differentiation is poorly understood. We discovered a lincRNA myocardial infarction associated transcript (MIAT) to be upregulated early after induction of human Th17 cell differentiation along with an increase in the chromatin accessibility at the gene locus. RNA-seq analysis identified genes implicated in Th17 differentiation and functions as MIAT targets. Our data suggests that MIAT contributes to human Th17 differentiation by upregulating several genes implicated in Th17 differentiation.

2022-05-25 | GSE183664 | GEO

Chromatin accessibility analysis of MIAT sufficient and MIAT deficient Th17 cells by ATAC-seq

Project description:Chromatin accessibility analysis of MIAT sufficient and MIAT deficient Th17 cells by ATAC-seq

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Long Intergenic Noncoding RNA MIAT Contributes to Human Th17 Cell Differentiation

Project description:Long Intergenic Noncoding RNA MIAT Contributes to Human Th17 Cell Differentiation

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PP2A is essential for Th17 differentiaiton

Project description:Phosphatase PP2A expression level is positively correlated to the clinical severity of systemic lupus erythematosus (SLE) and IL17A cytokine overproduction, indicating a potential role of PP2A in controlling TH17 differentiation and inflammation. By generating a mouse strain with the ablation of the catalytic subunit α of PP2A in peripheral mature T cells (PP2A cKO), we provide evidence here that PP2A complex is essential in TH17 differentiation. Hence, PP2A cKO mice exhibited a selective reduction of TH17 cell numbers and an attenuated disease severity in an experimental autoimmune encephalomyelitis (EAE) model. Importantly, PP2A deficiency ablated c-terminal phosphorylation of SMAD2 whereas increased c-terminal phosphorylation of SMAD3. Through direct binding to and regulating the activity of RORγt, the phosphorylational changes of these R-SMADs subsequently reduced Il17a transcription. Finally, PP2A inhibitors recapitulated the phenotype of PP2A cKO mice, i.e., inhibiting TH17 differentiation and protecting mice from EAE. Together, the current study proves that phosphatase PP2A is essential for TH17 differentiation, and inhibition of PP2A could be a possible therapeutic approach for the controlling of TH17-driven autoimmune diseases.

2018-09-13 | GSE119836 | GEO

Human Th17 Cell differentiation

Project description:The early stages of human Th17 Cell differentiation were studied using label free proteomics to compare Th17 polarized CD4+ human T cells at 24 h and 72 h with activated cells (72 and 24 h) and Thp cells.

2019-01-28 | PXD008973 | Pride

Transcriptome profiling of left ventricles from systemic MIAT knockout mice

Project description:Genome-wide transcriptomic analyses in left ventricles (LVs) from systemic MIAT knockout (KO) mice were performed to identify novel MIAT targets in the heart.

2022-01-10 | GSE185396 | GEO

Enhanced Pathogenicity of Th17 cells Generated in the Absence of Transforming Growth Factor-β Signaling

Project description:CD4+ T cells that selectively produce interleukin (IL)-17, are critical for host defense and autoimmunity1-4. Crucial for T helper17 (Th17) cells in vivo5,6, IL-23 has been thought to be incapable of driving initial differentiation. Rather, IL-6 and transforming growth factor (TGF)-β1 have been argued to be the factors responsible for initiating specification7-10. Herein, we show that Th17 differentiation occurs in the absence of TGF-β signaling. Neither IL-6 nor IL-23 alone efficiently generated Th17 cells; however, these cytokines in combination with IL-1β effectively induced IL-17 production in naïve precursors, independently of TGF-β. Epigenetic modification of the Il17a/Il17f and Rorc promoters proceeded without TGF-β1, allowing the generation of cells that co-expressed Rorγt and T-bet. T-bet+Rorγt+ Th17 cells are generated in vivo during experimental allergic encephalomyelitis (EAE), and adoptively transferred Th17 cells generated with IL-23 in the absence of TGF-β1 were more pathogenic in this experimental disease. These data suggest a new model for Th17 differentiation. Consistent with genetic data linking the IL23R with autoimmunity, our findings re-emphasize the role of IL-23 and therefore have important implications for the development of new therapies. Mouse T helper 17 cell differentiation with or without TGFB

2010-08-31 | E-GEOD-23505 | biostudies-arrayexpress

Transcriptional signature of Th17 cells expressing ICOS-based CARs

Project description:Analysis of TH17 cells redirected with chimeric antigen receptors (CAR) expressing various signaling domains (including CD28, 4-1BB and ICOS) after surrogate antigen stimulation. Our results showed that T cells redirected with an ICOS-based CAR specifically retained a genotype of TH17 cells with expression of Il17a, Il17f, Il1r1, Ccl20, Rorc, and in the absence of Foxp3 CAR-redirected TH17 cells from three different human normal donors were stimulated with immobilized recombinant mesothelin. Gene expression levels were determined prior to stimulation (day 0) and 4, 8, 24 and 96 hours upon antigen recognition.

2014-06-26 | E-GEOD-58867 | biostudies-arrayexpress

REV-ERBa regulates TH17 cell development and autoimmunity

Project description:RORγt is well recognized as the lineage defining transcription factor for TH17 cell development. However, the cell-intrinsic mechanisms that negatively regulate TH17 cell development and autoimmunity remain poorly understood. Here we demonstrate that the transcriptional repressor REV-ERBa is exclusively expressed in TH17 cells, competes with RORγt for their shared DNA consensus sequence, and negatively regulates TH17 cell development via repression of genes traditionally characterized as RORγt-dependent, including Il17a. Deletion of REV-ERBa enhanced TH17-mediated pro-inflammatory cytokine expression, exacerbating experimental autoimmune encephalomyelitis (EAE) and colitis. Treatment with REV-ERB-specific synthetic ligands, which have similar phenotypic properties as RORγ modulators, suppressed TH17 cell development, was effective in colitis intervention studies, and significantly decreased the onset, severity, and relapse rate in several models of EAE without affecting thymic cellularity. Our results establish that REV-ERBa negatively regulates pro-inflammatory TH17 responses in vivo and identifies the REV-ERBs as potential targets for the treatment of TH17-mediated autoimmune diseases.

2018-12-19 | GSE122726 | GEO

Enhanced Pathogenicity of Th17 cells Generated in the Absence of Transforming Growth Factor-β Signaling: ChIPSeq

Project description:CD4+ T cells that selectively produce interleukin (IL)-17, are critical for host defense and autoimmunity. Crucial for T helper17 (Th17) cells in vivo, IL-23 has been thought to be incapable of driving initial differentiation. Rather, IL-6 and transforming growth factor (TGF)-β1 have been argued to be the factors responsible for initiating specification. Herein, we show that Th17 differentiation occurs in the absence of TGF-β signaling. Neither IL-6 nor IL-23 alone efficiently generated Th17 cells; however, these cytokines in combination with IL-1β effectively induced IL-17 production in naïve precursors, independently of TGF-β. Epigenetic modification of the Il17a/Il17f and Rorc promoters proceeded without TGF-β1, allowing the generation of cells that co-expressed Rorγt and T-bet. T-bet+Rorγt+ Th17 cells are generated in vivo during experimental allergic encephalomyelitis (EAE), and adoptively transferred Th17 cells generated with IL-23 in the absence of TGF-β1 were more pathogenic in this experimental disease. These data suggest a new model for Th17 differentiation. Consistent with genetic data linking the IL23R with autoimmunity, our findings re-emphasize the role of IL-23 and therefore have important implications for the development of new therapies. Examination of Stat3 binding and H3K4me and H3Ac in helper T cells.

2010-08-31 | E-GEOD-23681 | biostudies-arrayexpress

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