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Retinoic acid signaling constrains the plasticity of Th1 cells and prevents development of pathogenic Th17 cells [ChIP-Seq experiments]

ABSTRACT: CD4+ T cells differentiate into phenotypically distinct T-helper cells upon antigenic stimulation. Regulation of plasticity between these CD4+ T-cell lineages is critical for immune homeostasis and prevention of autoimmune diseases. However, the factors that regulate lineage stability are largely unknown. Here we investigate a role for retinoic acid (RA) in the regulation of lineage stability using T helper 1 (Th1) cells, traditionally considered the most phenotypically stable Th subset. We found that RA, through its receptor RARa, sustains stable expression of Th1 lineage specifying genes as well as repressing genes that instruct Th17 cell fate. RA signaling is essential for limiting Th1 cell conversion into Th17 effectors and for preventing pathogenic Th17 responses in vivo. Our studies identify RA-RARa as a key component of the regulatory network governing Th1 cell fate and define a new paradigm for the development of pathogenic Th17 cells. These findings have important implications for autoimmune diseases in which dysregulated Th1-Th17 responses are observed. Identification of RARa binding in wild-type Th1 cells and mapping of enhancers using chromatin IP against p300, H3k4me1, H3k4me3, and H3k27ac in wild-type and dnRara Th1 cells.

ORGANISM(S): Mus musculus

SUBMITTER: Venu Pullabhatla

PROVIDER: E-GEOD-60353 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Retinoic acid signaling constrains the plasticity of Th1 cells and prevents development of pathogenic Th17 cells [Affymetrix experiments]

Project description:CD4+ T cells differentiate into phenotypically distinct T-helper cells upon antigenic stimulation. Regulation of plasticity between these CD4+ T-cell lineages is critical for immune homeostasis and prevention of autoimmune diseases. However, the factors that regulate lineage stability are largely unknown. Here we investigate a role for retinoic acid (RA) in the regulation of lineage stability using T helper 1 (Th1) cells, traditionally considered the most phenotypically stable Th subset. We found that RA, through its receptor RARa, sustains stable expression of Th1 lineage specifying genes as well as repressing genes that instruct Th17 cell fate. RA signaling is essential for limiting Th1 cell conversion into Th17 effectors and for preventing pathogenic Th17 responses in vivo. Our studies identify RA-RARa as a key component of the regulatory network governing Th1 cell fate and define a new paradigm for the development of pathogenic Th17 cells. These findings have important implications for autoimmune diseases in which dysregulated Th1-Th17 responses are observed. IFN-gamma+ Th1 cells from IFNgeYFP reporter mouse; comparing dnRARa to WT

2015-03-10 | E-GEOD-60354 | biostudies-arrayexpress

Retinoic acid signaling constrains the plasticity of Th1 cells and prevents development of pathogenic Th17 cells [Agilent experiments]

2015-03-10 | GSE60355 | GEO

Retinoic acid signaling constrains the plasticity of Th1 cells and prevents development of pathogenic Th17 cells [Affymetrix experiments]

2015-03-10 | GSE60354 | GEO

Retinoic acid signaling constrains the plasticity of Th1 cells and prevents development of pathogenic Th17 cells [ChIP-Seq experiments]

2015-03-10 | GSE60353 | GEO

Genome-wide regulatory analysis reveals T-bet controls Th17 lineage differentiation through direct suppression of IRF4

Project description:The complex relationship between Th1 and Th17 cells is incompletely understood. The transcription factor T-bet is best known as the master regulator of Th1 lineage commitment. However, attention is now focused on the repression of alternate T cell subsets mediated by T-bet, particularly the Th17 lineage. Specifically it has recently been suggested that pathogenic Th17 cells express T-bet and are dependent on IL-23. However, T-bet has previously been shown to be a negative regulator of Th17 cells. We have taken an unbiased approach to determine the functional impact of T-bet on Th17 lineage commitment. Genome-wide analysis of functional T-bet binding sites provides an improved understanding of the transcriptional regulation mediated by T-bet, and suggests novel mechanisms by which T-bet regulates T helper cell differentiation. Specifically, we show that T-bet negatively regulates Th17 lineage commitment via direct repression of the transcription factor interferon regulatory factor-4 (IRF4). An in vivo analysis of the pathogenicity of T-bet deficient T cells demonstrated that Th17 responses were augmented in the absence of T-bet, and we have defined a critical temporal window for T-bet function. The interaction of the two key transcription factors T-bet and IRF4 during the determination of T cell fate choice significantly advances our understanding of the mechanisms underlying the development of pathogenic T cells. ChIP-seq analysis of T-bet in WT and Tbet -/- mice.

2013-12-03 | E-GEOD-40623 | biostudies-arrayexpress

miRNA-seq study between Th0 and Th17 cells

Project description:To explore the differences in miRNA profiles, naive CD4+CD62L+ helper T cells were sorted by magnetic cell sorting from spleens of female C57BL/6 mice and were induced to differentiate into Th1 or Th17 cells, then total RNA was extracted and miRNA-seq were conducted. The results showed that many microTNAs presented a different expression pattern between Th1 and Th17 cells, which prompted us to further study their roles in Th117 differenciation. miRNA profiles of Th0 and Th17 cells were generated by deep sequencing, in triplicate, using Illumina HiSeq 2500

2016-07-30 | E-GEOD-80834 | biostudies-arrayexpress

Compare gene expression profiles of TCR transgenic CD4+ T helper type 1 (Th1) vs. type 17 (Th17) cells optimally stimulated by antigen and differentiated under Th1 or Th17 conditions.

Project description:The comparison of Th1 vs. Th17 cell expression profile has been plagued by 1) rarely use of physiologically relevant antigen-driven T helper cell differentiation; and 2) cell lineage tracking system to enrich highly pure Th subsets. We began our attempt to produce large numbers of antigen-specific T helper subsets for expression profiling, when Foxp3GFP knockin mice were first made by our laboratory in 2005. We crossed this line with syngeneic TEa TCR transgenic mice in C57BL/6 background, and use FACS to sort optimally stimulated, highly pure GFP(Foxp3)-negative populations for Th1 vs. Th17 expression profile comparison.

2019-03-15 | E-MTAB-7661 | biostudies-arrayexpress

Cytokine receptor modulation by interleukin-2 broadly regulates T helper cell lineage differentiation

Project description:T helper (Th) cells control host defense to pathogens. IL 12R expression is required for Th1, IL-4RM-NM-1 for Th2, and IL-6RM-NM-1/gp130 for Th17 differentiation to allow responsiveness to IL-12, IL-4, and IL-6, respectively. IL-2 via STAT5 controls Th2 differentiation by regulating the Th2 cytokine gene cluster and Il4ra expression. Here we show that IL-2 regulates Th1 differentiation, inducing STAT5-dependent IL-12RM-NM-22 and T-bet expression, with impaired human Th1 differentiation when IL-2 was blocked. Th1 differentiation was also impaired in mouse Il2-/- T cells but restored by IL-12RM-NM-22 expression. Consistent with IL-2M-bM-^@M-^Ys inhibition of Th17 differentiation, IL-2 decreased Il6ra and Il6st/gp130 expression, and Il6st augmented Th17 differentiation even when IL-2 was present. Thus, IL-2 influences T-cell differentiation by modulating cytokine receptor expression to help specify/maintain differentiated states. Genome-wide mapping of STAT1,STAT4,STAT5A,STAT5B binding to their target genes in Th1 or human CD4+ cells was conducted

2011-04-24 | E-GEOD-27158 | biostudies-arrayexpress

Functional and epigenetic studies reveal multistep differentiation and plasticity of in vitro and in vivo follicular T helper cells

Project description:Follicular T helper cells (Tfh) provide critical help to B cells for germinal center (GC) formation. Mutations affecting SLAM-associated Protein (SAP) prevent GC formation due to defective T-B cell interactions, yet effects on Tfh cell differentiation remain unclear. We describe the in vitro differentiation of functionally-competent “Tfh-like” cells that expressed Interleukin-21, Tfh markers, and Bcl6, and rescued GC formation in SAP-deficient hosts better than other T helper (Th) cells. SAP-deficient Tfh-like cells appeared virtually indistinguishable from wildtype, yet failed to support GCs in vivo. Interestingly, both Tfh-like and in vivo-derived Tfh cells could produce effector cytokines in response to polarizing conditions. Moreover, Th1, Th2 and Th17 cells could be reprogrammed to obtain Tfh characteristics. ChIP-Seq analyses revealed positive epigenetic markings on Tbx21, Gata3 and Rorc in Tfh-like and ex vivo Tfh cells, and Bcl6 in other Th cell populations, supporting the concept of plasticity between Tfh and other Th cells. Epigenetic modifications were evaluated in ChIP-Seq studies by profiling histone H3K4 and H3K27 trimethylation marks between Th1, Th2, Th17, Tfh-like, and CXCR5+PD-1+ sorted Tfh-like in vitro generated T helper cell populations and ex vivo derived Tfh cells.

2012-01-05 | E-GEOD-32864 | biostudies-arrayexpress

Combinatorial flexibility of cytokine during Human T helper cells differentiation

Project description:Transcriptional analysis of human T cells differentiated in 4 T Helper context ( Th0, Th1, Th2 and Th17) in the presence or not of Interferon alpha We analyzed the transcriptomic profiles of 4 human naives T cells diferentiated in Th0, Th1, Th2 and Th17 in the presence or not of Interferon Alpha. Microarray analyses were performed in 2 time points : 1/ after Day 5 of polarization (= Day5); 2/ after Day 5+ four hours of re-stimulation (=Day 5+ 4H restim) in 3 different donors.

2014-05-29 | E-GEOD-54627 | biostudies-arrayexpress

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