Homo sapiens
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PROVIDER: PRJNA124511 | ENA |
REPOSITORIES: ENA
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Project description:Gene expression profiles of subsets of CD4+ T cells according to their expression of FoxP3 and CD45RA were compared. Abstract: FoxP3 is a key transcription factor for the development and function of natural CD4+ regulatory T cells (Tregs). Here we show that human FoxP3+CD4+ T cells are composed of three phenotypically and functionally distinct subpopulations: CD45RA+FoxP3low resting Tregs (rTregs) and CD45RA-FoxP3high activated Tregs (aTregs), both of which are suppressive in vitro, and cytokine-secreting CD45RA-FoxP3low non-suppressive T cells. The proportion of the three subpopulations characteristically altered in cord blood, aged individuals, and patients with immunological diseases. Terminally differentiated aTregs rapidly die while rTregs proliferate and convert into aTregs in vitro and in vivo as shown by the transfer of rTregs into NOD-scid-common gamma-chain-knockout mice and by TCR sequence-based T cell clonotype tracing in peripheral blood of normal individuals. Taken together, the dissection of FoxP3+ cells into subsets enables one to analyze Treg differentiation dynamics and interactions in normal and disease states, and to control immune responses through manipulating particular FoxP3+ subpopulations. RNA was extracted from freshly obtained peripheral blood lymphocytes from a healthy donor that were separated according to their expression of CD25, CD127 and CD45RA after surface staining.
2009-05-21 | E-GEOD-15659 | biostudies-arrayexpress
Project description:The transcription factor (TF) Forkhead Box P3 (FOXP3) is constitutively expressed in high levels in natural occurring CD4+CD25+ regulatory T cells (nTreg) and is not only the most accepted marker for that cell population, but is considered lineage determinative. Chromatin immunoprecipitation (ChIP) of transcription factors in combination with genomic tiling microarray analysis (ChIP-on-Chip) has been shown to be an appropriate tool to identify FOXP3 transcription factor binding sites (TFBS) on a genome-wide scale. In combination with microarray expression analysis the ChIP-on-Chip technique allows to identify direct FOXP3 target genes. This dataset shows expression data of resting and mitogen stimulated (PMA / ionomycin) retrovirally transduced Jurkat T cells either expressing FOXP3(M-NM-^T2) (J-FOXP3) or an empty vector control (J-GFP). Expression profile of resting and PMA/ionomycin stimulated J-GFP and J-FOXP3 cells was analyzed (one microarray per condition).
2012-11-26 | E-GEOD-37253 | biostudies-arrayexpress
Project description:Regulatory T (Treg) cells are involved in self tolerance, immune homeostasis, prevention of autoimmunity, and suppression of immunity to pathogens or tumours. The forkhead transcription factor FOXP3 is essential for Treg cell development and function as mutations in FOXP3 cause severe autoimmunity in mice and humans. However, the FOXP3-dependent molecular mechanisms leading to this severe phenotype are not well understood. Here we introduce the chromatin remodelling enzyme SATB1 (special AT-rich sequence-binding protein-1) as an important target gene of FOXP3. So far, SATB1 has been associated with normal thymic T-cell development, peripheral T-cell homeostasis, TH1/TH2 polarization, and reprogramming of gene expression. In natural and induced murine and human FOXP3+ Treg cells SATB1 expression is significantly reduced. While there is no differential epigenetic regulation of the SATB1 locus between Treg and Teffector cells, FOXP3 reduces SATB1 expression directly as a transcriptional repressor at the SATB1 locus and indirectly via miR-155 induction, which specifically binds to the 3’UTR of the SATB1 mRNA. Reduced SATB1 expression in FOXP3+ cells achieved either by overexpression or induction of FOXP3 is linked to significant reduction in TH1 and TH2 cytokines, while loss of FOXP3 function either by knock down or genetic mutation leads to significant upregulation of SATB1 and subsequent cytokine production. Alltogether, these findings demonstrate that reduced SATB1 expression in Treg cells is necessary for maintenance of a Treg-cell phenotype in vitro and in vivo and places SATB1-mediated T cell-specific modulation of global chromatin remodelling central during the decision process between effector and regulatory T-cell function. Gene expression profiling of freshly isolated CD4+ T cells, separated into CD25 negative and positive subpopulations, from three different donors. FOXP3 is stably and constitutively expressed at a high level in CD4+CD25+ regulatory T cells and at a low level in CD4+CD25- cells.
2011-08-13 | E-GEOD-15390 | biostudies-arrayexpress
Project description:The transcription factor (TF) Forkhead Box P3 (FOXP3) is constitutively expressed in high levels in natural occurring CD4+CD25+ regulatory T cells (nTreg) and is not only the most accepted marker for that cell population, but is considered lineage determinative. Chromatin immunoprecipitation (ChIP) of transcription factors in combination with genomic tiling microarray analysis (ChIP-on-Chip) has been shown to be an appropriate tool to identify FOXP3 transcription factor binding sites (TFBS) on a genome-wide scale. In combination with microarray expression analysis the ChIP-on-Chip technique allows to identify direct FOXP3 target genes. This dataset shows expression data of resting and mitogen stimulated (PMA / ionomycin) retrovirally transduced Jurkat T cells either expressing FOXP3(Δ2) (J-FOXP3) or an empty vector control (J-GFP).
2012-11-26 | GSE37253 | GEO
Project description:The gene expression profile of peripheral Foxp3+ natural regulatory T cells isolated from Foxp3/EGFP bicistronic mice was compared to that of in vitro-induced regulatory T cells and to CD4+ conventional (Foxp3-) T cells. The role of the regulatory T cell transcription factor Foxp3 in shaping the transcriptosomes of natural and induced regulatory T cells was analyzed using mice expressing a mutant FOXP3-EGFP fusion protein (Foxp3deltaEGFP). We used gene expression microarrays to examine the transcriptional programs of natural and induced regulatory T cells and the function of Foxp3 in organizing the transcriptosomes of the respective cell type Experiment Overall Design: Conventional T cells and natural and induced regulatory T cells were derived from Foxp3/EGFP bicistronic mice and analyzed for their gene expression profile. Conventional T cells, regulatory T cell precursors (CD4+Foxp3deltaEGFP+) and induced regulatory T cell precursors (CD4+Foxp3deltaEGFP+) cells were deriv ed from Foxp3deltaEGFP mice
2009-03-07 | E-GEOD-14415 | biostudies-arrayexpress
Project description:The transcription factor (TF) Forkhead Box P3 (FOXP3) is constitutively expressed in high levels in natural occurring CD4+CD25+ regulatory T cells (nTreg) and is not only the most accepted marker for that cell population, but is considered lineage determinative. Chromatin immunoprecipitation (ChIP) of transcription factors in combination with genomic tiling microarray analysis (ChIP-on-Chip) has been shown to be an appropriate tool to identify FOXP3 transcription factor binding sites (TFBS) on a genome-wide scale. In combination with microarray expression analysis the ChIP-on-Chip technique allows to identify direct FOXP3 target genes. ChIP-on-Chip analysis of human FOXP3M-NM-^T2 isoform expressed in resting and PMA / ionomycin stimulated Jurkat T cells revealed several thousand putative FOXP3 binding sites and importance of intronic regions for FOXP3 binding. Knowledge of general distribution patterns of FOXP3 TFBS in the human genome under resting and activated conditions contributes to a better understanding of this TF and its influence on direct target genes with importance for Treg cell phenotype and function. ChIP-DNA from FOXP3(M-NM-^T2) expressing Jurkat T cells under resting and PMA / ionomycin stimulated conditions from duplicate experiments was analyzed. FOXP3-specific tiling array data were analyzed in reference to an individual isotype control dataset (J-FOXP3 ChIP'd with FOXP3 antibody vs. J-FOXP3 ChIP'd with isotype control antibody). In total 8 tiling array analyses were performed (2x resting J-FOXP3 with FOXP3-IP, 2x resting J-FOXP3 with isotype-IP, 2x PMA/iono J-FOXP3 with FOXP3-IP, 2x PMA/iono J-FOXP3 with isotype-IP)
2012-11-26 | E-GEOD-37252 | biostudies-arrayexpress
Project description:The concept of immune regulation/suppression has been well-established. With thymus-derived CD4 CD25 regulatory T (TR) cells, it became clear that a variety of additional peripherally induced TR cells play vital roles in protection from many harmful immune responses including intestinal inflammation. In the present study, we have analyzed in vivo-induced Ag-specific CD4 TR cells with respect to their molecular and functional phenotype. By comparative genomics we could show that these Ag-specific TR cells induced by chronic Ag stimulation in vivo clearly differ in their genetic program from naturally occurring thymus-derived CD4 CD25 TR cells. This distinct population of induced TR cells express neither CD25 nor the TR-associated transcription factor Foxp3. Strikingly, CD25 is not even up-regulated upon stimulation. Despite the lack in Foxp3 expression, these in vivo-induced CD25 TR cells are able to interfere with an Ag-specific CD8 T cell-mediated intestinal inflammation without significant increase in CD25 and Foxp3 expression. Thus, our results demonstrate that in vivo-induced Ag-specific TR cells represent a distinct population of Foxp3 CD25 TR cells with regulatory capacity both in vitro and in vivo. Keywords: cell type comparison
2008-08-21 | GSE12506 | GEO
Project description:The transcription factor (TF) Forkhead Box P3 (FOXP3) is constitutively expressed in high levels in natural occurring CD4+CD25+ regulatory T cells (nTreg) and is not only the most accepted marker for that cell population, but is considered lineage determinative. Chromatin immunoprecipitation (ChIP) of transcription factors in combination with genomic tiling microarray analysis (ChIP-on-Chip) has been shown to be an appropriate tool to identify FOXP3 transcription factor binding sites (TFBS) on a genome-wide scale. In combination with microarray expression analysis the ChIP-on-Chip technique allows to identify direct FOXP3 target genes. ChIP-on-Chip analysis of human FOXP3Δ2 isoform expressed in resting and PMA / ionomycin stimulated Jurkat T cells revealed several thousand putative FOXP3 binding sites and importance of intronic regions for FOXP3 binding. Knowledge of general distribution patterns of FOXP3 TFBS in the human genome under resting and activated conditions contributes to a better understanding of this TF and its influence on direct target genes with importance for Treg cell phenotype and function.
2012-11-26 | GSE37252 | GEO
Project description:The objective of the present study was to characterize the phenotype of CD4+CD25+Foxp3+ regulatory T cells (Tregs) in the course of parasitic Plasmodium yoelii (P .yoelii) infection of BALB/c mice. Therefore we performed microarray expression analysis of CD4+CD25+Foxp3+ Tregs isolated by FACS from spleens of non-infected mice and from spleens of mice infected with P. yoelii 3 days and 5 days post infection. By comparing the gene expression profiles, we were able to identify molecules which were differentially expressed by Tregs during parasitic infection and thereby might be involved in their immune-suppressive function. Moreover, we included CD4+CD25-Foxp3- T cells from spleens of non-infected and P. yoelii-infected mice in our analysis. It was proposed that immune-suppressive CD4+CD25-Foxp3- T cells might be induced during Plasmodium infection of mice. Thus, detailed gene expression data of these cells in comparison to CD4+CD25+Foxp3+ Tregs would contribute a better understanding in the phenotype. FACS sorted CD4+CD25+Foxp3+ Tregs and CD4+CD25-Foxp3- T cells from pooled spleens of non-infected Foxp3/ eGFP mice (served as reference) and from pooled spleens of P. yoelii infected Foxp3/ eGFP mice 3 days and 5 days post infection were analyzed as single probes.
2012-04-15 | E-GEOD-34621 | biostudies-arrayexpress
Project description:The concept of immune regulation/suppression has been well-established. With thymus-derived CD4 CD25 regulatory T (TR) cells, it became clear that a variety of additional peripherally induced TR cells play vital roles in protection from many harmful immune responses including intestinal inflammation. In the present study, we have analyzed in vivo-induced Ag-specific CD4 TR cells with respect to their molecular and functional phenotype. By comparative genomics we could show that these Ag-specific TR cells induced by chronic Ag stimulation in vivo clearly differ in their genetic program from naturally occurring thymus-derived CD4 CD25 TR cells. This distinct population of induced TR cells express neither CD25 nor the TR-associated transcription factor Foxp3. Strikingly, CD25 is not even up-regulated upon stimulation. Despite the lack in Foxp3 expression, these in vivo-induced CD25 TR cells are able to interfere with an Ag-specific CD8 T cell-mediated intestinal inflammation without significant increase in CD25 and Foxp3 expression. Thus, our results demonstrate that in vivo-induced Ag-specific TR cells represent a distinct population of Foxp3 CD25 TR cells with regulatory capacity both in vitro and in vivo. Experiment Overall Design: To define the molecular signature of Ag-specific in vivo-induced dtg CD25 TR cells in comparison to naturally occurring CD25 TR cells, we performed comparative gene expression profiling by Affymetrix microarray analysis. Sorted splenic wild-type (WT) TR cells, stg TR cells, dtg CD25- TR cells, dtg CD25+ TR cells, in vitro-stimulated stg 16h TA cells, stg 3d TA cells as well as stg TN cells, were included in the experiment and analyses were performed in triplicates.
2008-10-25 | E-GEOD-12506 | biostudies-arrayexpress