Single cell transcriptomic studies of mouse colonic lamina propria cells from wildtype or RORgtS182A mutant mice
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE173887 | GEO | 2022/02/15
REPOSITORIES: GEO
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Project description:TH17 cells play a critical role in mucosal immunity and also in multiple autoimmune diseases. The differentiation of TH17 cells is dictated by a master transcription factor, RORγt; however, the mechanism by which RORγt controls target genes is poorly understood. Here we identify the Swi/Snf chromatin remodeling complex as an essential regulator of TH17 cell differentiation. Loss of the expression of SRG3/mBAF155, a core subunit of the Swi/Snf complex, results in a specific downregulation of RORγt target genes such as IL-17A, IL-17F and IL-23R. Importantly, the comparative transcriptional analysis reveals a high similarity between RORγt and the Swi/Snf complex in the control of TH17-related gene expression. Mechanistically, the Swi/Snf complex partners with RORγt and coordinates a variety of RORγt–mediated epigenetic modifications, including both permissive and repressive ones. These results provide a basis for the understanding of how a master transcription factor RORγt cooperates with the Swi/Snf complex to govern the Th17 cell differentiation.
2020-05-06 | GSE129132 | GEO
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
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
Project description:CD4+ T helper lymphocytes that express interleukin-17 (Th17 cells) have critical roles in mouse models of autoimmunity, and there is mounting evidence that they also influence inflammatory processes in humans. Genome-wide association studies in humans have linked genes involved in Th17 cell differentiation and function with susceptibility to Crohn’s disease, rheumatoid arthritis, and psoriasis1-3. Thus, the pathway towards differentiation of Th17 cells and, perhaps, of related innate lymphoid cells with similar effector functions4, 5, is an attractive target for therapeutic applications. Mouse and human Th17 cells are distinguished by expression of the retinoic acid receptor-related orphan nuclear receptor RORγt, which is required for induction of IL-17 transcription and for the manifestation of Th17-dependent autoimmune disease in mice6. By performing a chemical screen with an insect cell-based reporter system, we identified the cardiac glycoside digoxin as a specific inhibitor of RORγt transcriptional activity. Digoxin inhibited murine Th17 cell differentiation without affecting differentiation of other T cell lineages and was effective in delaying the onset and reducing the severity of autoimmune disease in mice. At high concentrations, digoxin is toxic for human cells, but non-toxic synthetic derivatives, 20,22-dihydrodigoxin-21,23-diol (Dig(dhd)) and digoxin-21-salicylidene (Dig(sal)), specifically inhibited induction of IL-17 in human CD4+ T cells. Using these small molecule compounds, we demonstrated that RORγt is imporant for the maintenance of IL-17 expression in mouse and human effector T cells. These data suggest that derivatives of digoxin can be used as chemical probes for development of RORγt-targeted therapeutic agents that attenuate inflammatory lymphocyte function and autoimmune disease. We performed gene expression profiling with total RNA samples isolated from DMSO- or digoxin-treated wildtype or RORγt-deficient cells cultured in Th17 conditions. Total RNA was extracted with TRIzol. RNA was labeled and hybridized to GeneChip Mouse Genome 430 2.0 arrays following the Affymetrix protocols. Data were analyzed in GeneSpring GX11.5.
2011-03-28 | E-GEOD-27241 | biostudies-arrayexpress
Project description:Dysregulated IL-23/IL-17 responses have been linked to psoriatic arthritis and other forms of spondyloarthritides (SpA). RORγt, the key Thelper17 (Th17) cell transcriptional regulator, is also expressed by subsets of innate-like T cells, including invariant natural killer T (iNKT) and γδ-T cells, but how they contribute to disorders such as SpA is still unclear. Here we describe the presence of particular RORγt+T-betloPLZF- iNKT and γδ-hi T cell subsets in healthy peripheral blood. RORγt+ iNKT and γδ-hi T cells showed profound IL-23 mediated Th17-like immune responses and were clearly enriched within inflamed joints of SpA patients where they act as major IL-17 secretors. SpA derived iNKT and γδ-T cells showed a unique Th17 skewed phenotype and gene expression profile. Strikingly, RORγt inhibition blocked γδ17 and iNKT17 cell function while selectively sparing IL-22+ subsets. Overall, these findings highlight a unique diversity of human RORγt+ T cells and underscore the potential of RORγt antagonism to modulate aberrant type 17 responses.
2018-11-17 | GSE122624 | GEO
Project description:Interleukin 2 (IL-2), a cytokine linked to human autoimmune diseases, limits IL-17 production. We show that deletion of Stat3 in T cells abrogates IL-17 production and attenuates autoimmunity associated with IL-2 deficiency. While STAT3 induces IL-17 and RORγt and inhibits Foxp3, IL-2 inhibited IL-17 independently of Foxp3 and RORγt. We found that STAT3 and STAT5 bound to multiple common sites across the Il17 genetic locus. The induction of STAT5 binding by IL-2 was associated with a reduction in STAT3 binding at these sites and the inhibition of associated active epigenetic marks. Titrating the relative activation of STAT3 and STAT5 modulated TH17 cell specification. Thus, the balance rather than the absolute magnitude of these signals determines the propensity of cells to make a key inflammatory cytokine. The genome-wide binding of STAT3 and STAT5 under Th17 conditions was investigated by CHIP-seq.
2011-02-09 | E-GEOD-26552 | biostudies-arrayexpress
Project description:RORγt is the lineage-specific transcription factor for T helper 17 (Th17) cells and an attractive drug target for treating Th17-associated diseases. Though the critical role of RORγt in early Th17 cell differentiation has been well recognized, whether it maintains mature Th17 cell phenotypes remains largely unexplored. Here, we show that genetic deletion of Rorc in mature Th17 cells inhibited their pathogenic functions. Mechanistically, loss of RORγt led to a closed chromatin structure at key Th17-specific gene loci, particularly at those so called “super enhancer” regions. Furthermore, RORc deletion in effector Th17 cells resulted in a strongly Th2-biased cell phenotype at both epigenetic and transcriptional levels, in an IL-4-dependent manner. Our results thus reveal a crucial function of RORγt in effector Th17 cells in maintaining Th17 cell program and constraining Th2 cell conversion, offering new considerations in therapeutic targeting of RORγt.
2022-07-12 | GSE190425 | GEO
Project description:RORγt is the lineage-specific transcription factor for T helper 17 (Th17) cells and an attractive drug target for treating Th17-associated diseases. Though the critical role of RORγt in early Th17 cell differentiation has been well recognized, whether it maintains mature Th17 cell phenotypes remains largely unexplored. Here, we show that genetic deletion of Rorc in mature Th17 cells inhibited their pathogenic functions. Mechanistically, loss of RORγt led to a closed chromatin structure at key Th17-specific gene loci, particularly at those so called “super enhancer” regions. Furthermore, RORc deletion in effector Th17 cells resulted in a strongly Th2-biased cell phenotype at both epigenetic and transcriptional levels, in an IL-4-dependent manner. Our results thus reveal a crucial function of RORγt in effector Th17 cells in maintaining Th17 cell program and constraining Th2 cell conversion, offering new considerations in therapeutic targeting of RORγt.
2022-07-12 | GSE190538 | GEO
Project description:RORγt is a transcription factor required for T helper 17 (Th17) cell development. We identified three RORγt-specific inhibitors that suppress Th17 cell responses including Th17 cell-mediated autoimmune disease. We systemically characterized RORγt binding data in the presence and absence of drug with corresponding whole-transcriptome sequencing for wild-type and RORγt-deficient cells. RORγt is central in a densely interconnected regulatory network, acting both as a direct activator of genes important for Th17 cell differentiation and as a direct repressor of genes from other T-cell lineages. The three inhibitors identified here reversed both of these modes of action, but to varying extents and through distinct mechanisms. Whereas one inhibitor displaced RORγt from its target-loci, the two more potent inhibitors affected transcription predominantly without removing DNA-binding. Our work illustrates the power of a system-scale analysis of transcriptional regulation to characterize potential therapeutic compounds that inhibit pathogenic Th17 cells and suppress autoimmunity. DNA binding of RORγt in WT Th17 cells and under chemical perturbations of RORγt; Additional data is included for epitope-tagged exogenous RORγt in EL4 cells (a murine lymphoma cell line)
2014-04-17 | E-GEOD-56019 | biostudies-arrayexpress
Project description:RORγt is a transcription factor required for T helper 17 (Th17) cell development. We identified three RORγt-specific inhibitors that suppress Th17 cell responses including Th17 cell-mediated autoimmune disease. We systemically characterized RORγt binding data in the presence and absence of drug with corresponding whole-transcriptome sequencing for wild-type and RORγt-deficient cells. RORγt is central in a densely interconnected regulatory network, acting both as a direct activator of genes important for Th17 cell differentiation and as a direct repressor of genes from other T-cell lineages. The three inhibitors identified here reversed both of these modes of action, but to varying extents and through distinct mechanisms. Whereas one inhibitor displaced RORγt from its target-loci, the two more potent inhibitors affected transcription predominantly without removing DNA-binding. Our work illustrates the power of a system-scale analysis of transcriptional regulation to characterize potential therapeutic compounds that inhibit pathogenic Th17 cells and suppress autoimmunity. Transcriptional profiling of Th17 cells under chemical perturbations of RORγt, DMSO, and knockout of RORγt. It includes repeats for all the data in GSE56018, plus one additional condition.
2014-04-17 | E-GEOD-56240 | biostudies-arrayexpress