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Transcription profiling of regulatory T cells (Treg) and Effector CD4+ T cells in healthy B6 mice and sick mice with scurfy mutation - Foxp3-deficient Treg cells do not revert into conventional Effector CD4+ T cells but constitute a unique cell subset

ABSTRACT: Gene expression profiles were compared between regulatory T cells (Treg) and Effector CD4+ T cells in healthy B6 mice and sick mice with scurfy mutation. We used microarrays to elucidate the molecular mechanisms underlying the suppression function of the Treg cells. Experiment Overall Design: To identify candidate genes that might be related to the suppressive activity, the Treg cells expressing functional and mutant Foxp3 transcription factor were compared

ORGANISM(S): Mus musculus

SUBMITTER: Piotr Kraj

PROVIDER: E-GEOD-11775 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Foxp3-deficient Treg cells do not revert into conventional Effector CD4+ T cells but constitute a unique cell subset

Project description:Gene expression profiles were compared between regulatory T cells (Treg) and Effector CD4+ T cells in healthy B6 mice and sick mice with scurfy mutation. We used microarrays to elucidate the molecular mechanisms underlying the suppression function of the Treg cells. Keywords: Cell type comparison

2009-08-28 | GSE11775 | GEO

Regulatory T cells

Project description:Induced and activated regulatory CD4+ Foxp3+ cells compared Conventional naive CD4+ T cells were sorted and converted in vitro into adaptive Treg cells, activated Treg cells were generated in vitro from sorted Foxp3GFP+ cells

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Sequence analysis of CD4 Treg, CD8 Treg and CD8 effector

Project description:We show that Ly49+CD122+ CD8+ Treg have a distinct expression profie compared to conventional Foxp3+ CD4+ Treg and CD49 lo CD122+ CD8 effector like cells. RNA was extracted from sorted cells and sent for sequencing

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Sequence analysis of CD4 Treg, CD8 Treg and CD8 effector

Project description:Sequence analysis of CD4 Treg, CD8 Treg and CD8 effector

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Treg cells from human blood differentiate into non-lymphoid tissue-resident effector cells upon TNFR2 costimulation

Project description:Regulatory T (Treg) cells can facilitate transplant tolerance and attenuate autoimmune- and inflammatory diseases. Therefore, it is clinically relevant to stimulate Treg cell expansion and function in vivo and to create therapeutic Treg cell products in vitro. We report that TNF receptor 2 (TNFR2) is a unique costimulus for naïve, thymus-derived (t)Treg cells from human blood that promotes their differentiation into non-lymphoid tissue (NLT)-resident effector Treg cells, without Th-like polarization. In contrast, CD28 costimulation maintains a lymphoid tissue (LT)-resident Treg cell phenotype. We base this conclusion on transcriptome and proteome analysis of TNFR2- and CD28-costimulated CD4+ Treg cells and conventional T (Tconv) cells, followed by bioinformatic comparison with published transcriptomic Treg cell signatures from NLT and LT in health and disease, including autoimmunity and cancer. These analyses illuminate that TNFR2 costimulation promotes Treg cell capacity for survival, migration, immunosuppression and tissue regeneration. Functional studies confirmed improved migratory ability of TNFR2-costimulated tTreg cells. Flow cytometry validated the presence of the TNFR2-driven Treg cell signature in effector/memory Treg cells from the human placenta as opposed to blood. Thus, TNFR2 can be exploited as driver of NLT-resident Treg cell differentiation for adoptive cell therapy or antibody-based immunomodulation in human disease.

2024-01-24 | PXD048248 | Pride

Transcription profiling of human AICD resistent TReg vs. CD4+CD25high TReg cells

Project description:In this screen we compared cDNA from rTreg (AICD resistent TReg cells) against cDNA derived from all CD4+CD25hi Treg for further molecular characterization of rTreg Experiment Overall Design: Single comparison of rTReg vs. TReg. We pooled rTreg-cDNA derived from FACS-sorted CD4+CD25hi Treg of eight healthy blood donors and performed gene chip microarray analysis.

2008-06-12 | E-GEOD-4243 | biostudies-arrayexpress

Unveiling IRF4-steered regulation of context-dependent effector programs in CD4+ T cells under Th17- and Treg-skewing conditions

Project description:The transcription factor IRF4 is crucial for the fate determination of pro-inflammatory T helper (Th)17 and the functionally opposing group of immunomodulatory regulatory T (Treg) cells. However, molecular mechanisms of how IRF4 steers diverse transcriptional programs in Th17 and Treg cells are far from being definitive. To unveil IRF4-driven lineage determination, we integrated data derived from affinity-purification and full mass spectrometry-based proteome analysis with chromatin immune precipitation sequencing. This allowed the characterization of subtype-specific molecular programs and the identification of IRF4 interactors in the Th17/Treg context. Our data reveal that IRF4-interacting transcription factors are recruited to IRF composite elements for the regulation of cell type-specific transcriptional programs as exemplarily demonstrated for FLI1, which in cooperation with IRF4 promotes Th17-specific gene expression. Inhibition of FLI1 markedly impaired Th17-differentiation. The present ‘omics’ dataset provides a valuable resource for studying IRF4-mediated gene regulatory programs in pro- and anti-inflammatory immune responses.

2025-03-05 | PXD060137 | JPOST Repository

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Increased sensitivity of CD4+ T-effector cells to CD4+CD25+ Treg suppression compensates for reduced Treg number in asymptomatic HIV-1 infection.

Project description:BackgroundIn HIV infection, uncontrolled immune activation and disease progression is attributed to declining CD4+CD25+FoxP3+ regulatory T-cell (Treg) numbers. However, qualitative aspects of Treg function in HIV infection, specifically the balance between Treg cell suppressive potency versus suppressibility of effector cells, remain poorly understood. This report addresses this issue.Methodology/principal findingsA classic suppression assay to measure CD4+CD45RO+CD25hi Treg cells to suppress the proliferation of CD4+CD45RO+CD25- effectors cells (E) following CD3/CD28 polyclonal stimulation was employed to compare the suppressive ability of healthy volunteers (N = 27) and chronic, asymptomatic, treatment naïve, HIV-infected subjects (N = 14). HIV-infected subjects displayed significantly elevated Treg-mediated suppression compared to healthy volunteers (p = 0.0047). Cross-over studies comparing Treg cell potency from HIV-infected versus control subjects to suppress the proliferation of a given population of allogeneic effector cells demonstrated increased sensitivity of CD4+CD25- effector cells from HIV-infected subjects to be suppressed, associated with reduced production of the Treg counter-regulatory cytokine, IL-17, rather than an increase in the suppressive potential of their CD4+CD25+ Treg cells. However, compared to controls, HIV+ subjects had significantly fewer absolute numbers of circulating CD4+CD25+FoxP3+ Treg cells. In vitro studies highlighted that one mechanism for this loss could be the preferential infection of Treg cells by HIV.Conclusions/significanceTogether, novel data is provided to support the contention that elevated Treg-mediated suppression may be a natural host response to HIV infection.

| S-EPMC2822868 | biostudies-literature

Human Fetal and Adult Peripheral Naïve CD4+ T cells and CD4+CD25+ Treg cells

Project description:We compared differences in fetal and adult T cells by performing whole genome profiling on sort-purified T cells (naïve CD4+ and Treg cells) from human fetal specimens (18-22 gestational weeks) and adult specimens (age 25-40 years old). Fetal and Adult Naïve CD4+ T cells phenotype: CD3+CD4+CD45RA+CCR7+CD27+, Fetal and Adult CD4+CD25+ Treg phenotype: CD3+CD4+CD25bright Four different groups were analyzed: Fetal Naïve CD4+ T cells, Adult Naïve CD4+ T cells, Fetal Treg cells, Adult Treg cells. For each group three independent donors were analyzed.

2010-12-17 | E-GEOD-25087 | biostudies-arrayexpress

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