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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from sorted Treg cells from WT or motheaten mice

ABSTRACT: The importance of regulatory T cells (Treg) for immune tolerance is well recognized, yet the signaling molecules influencing their suppressive activity are relatively poorly understood. We identified the cytoplasmic tyrosine phosphatase SHP-1 as a novel ‘endogenous brake’ and modifier of the suppressive ability of Treg cells; consistent with this notion, loss of SHP-1 expression strongly augments the ability of Treg cells to suppress inflammation in a mouse model. Specific harmacological inhibition of SHP-1 enzymatic activity via the cancer drug sodium stibogluconate (SSG) potently augmented Treg cell suppressor activity both in vivo and ex vivo. We evaluated the gene expression profiles of sorted T reg cells (CD4+CD25+) from wild type (wt) mice and mice that were heterozygous (he) or homozygous (me) for SHP-1 knockout (motheaten phenotype). T reg (CD4+CD25+) cells were isolated form wild type (WT) mice and that were heterozygous (he) or homozygous (me) for SHP-1 knockout (motheaten phenotype); totalRNA was isolated using Arcturus reagents; aRNA was generated and amplified using Arcturus reagents; and labeled product was hybridized to Affymetrix chips to asses gene expression patterns.

ORGANISM(S): Mus musculus

SUBMITTER: David Mullins

PROVIDER: E-GEOD-23600 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Expression data from sorted Treg cells from WT or motheaten mice

Project description:The importance of regulatory T cells (Treg) for immune tolerance is well recognized, yet the signaling molecules influencing their suppressive activity are relatively poorly understood. We identified the cytoplasmic tyrosine phosphatase SHP-1 as a novel ‘endogenous brake’ and modifier of the suppressive ability of Treg cells; consistent with this notion, loss of SHP-1 expression strongly augments the ability of Treg cells to suppress inflammation in a mouse model. Specific harmacological inhibition of SHP-1 enzymatic activity via the cancer drug sodium stibogluconate (SSG) potently augmented Treg cell suppressor activity both in vivo and ex vivo. We evaluated the gene expression profiles of sorted T reg cells (CD4+CD25+) from wild type (wt) mice and mice that were heterozygous (he) or homozygous (me) for SHP-1 knockout (motheaten phenotype).

2010-08-13 | GSE23600 | GEO

Themis1-mediated repression of SHP-1 activity promotes regulatory T cell suppressive functions through a Vav1-RelA signaling axis

Project description:Regulatory T cells (Tregs) expressing the transcription factor Foxp3 constitute a unique T cell lineage committed to suppressive functions and are crucial for suppressing aberrant immune responses in autoimmunity and allergy. Treg transcriptional landscape is tightly controlled by Foxp3-binding partners, including RelA. Although those DNA-binding complexes have been well characterized, the TCR signaling events that coordinate those dynamic molecular assembly are still poorly understood. Using a combination of genetic models, we show that the suppressive function of Tregs is controlled by a tri-molecular interplay between the signaling proteins Themis1, Vav1 and SHP-1. We identify the tyrosine phosphatase SHP-1 as a central component of an inhibitory circuit, which leads to the dephosphorylation of Vav1, which in turn is associated with a dramatic reduction of RelA activity and Treg suppressive function. Themis1 disconnects this circuit by blocking SHP-1 catalytic activity. Collectively, our results reveal a previously unappreciated pathway, whereby Themis1-mediated repression of SHP-1 activity promotes Tregs suppressive functions through a Vav1-RelA signaling axis.

2021-06-01 | GSE165882 | GEO

Expression profiling of WT and p110delta D910A Treg

Project description:The PI3K pathway has emerged as a key regulator of regulatory T cell (Treg) development and homeostasis and is required for full Treg-mediated suppression. To identify new genes involved in PI3K-dependent suppression we compared the transcriptome of WT and p110delta D910A Tregs. Among the genes that were differentially expressed was CD38. Here we show that CD38 is expressed mainly by a subset of Foxp3+CD25+CD4+ T cells originating in the thymus and on Tregs in the spleen. CD38high WT Tregs showed superior suppressive activity and CD38low Tregs failed to upregulate CD73, a surface protein which is important for suppression. However, Tregs from heterozygous CD38+/- mice were unimpaired despite their lower levels of CD38 expression. Therefore, CD38 can be used as a marker for Tregs with high suppressive activity and the impaired Treg function in p110delta D910A mice can in part be explained by the failure of CD38high cells to develop.

2011-04-01 | E-MEXP-2955 | biostudies-arrayexpress

Integrin alpha-6 (CD49f) defines a novel and distinct subset of CD4+ regulatory T cells with potent suppression activity.

Project description:A common method used both in vitro and in vivo, to identify Tregs in CD4+ T cells is through the characterization of surface marker CD25. Although CD25 expression is well correlated with regulatory activity in vitro, CD4+CD25+ T cells are not the only regulatory CD4+ T cells in vivo. Studies suggest that in many situations, CD4+CD25M-bM-^@M-^S T cells are as effective as CD4+CD25+ T cells in controlling T cell mediated disease. Therefore, CD25 is not a uniquely specific cell surface marker for the identification of Tregs. CD49f is an M-NM-16-integrin subunit which dimerizes with either the M-NM-2 1 or M-NM-2 4 subunit to form receptors for various laminin isoforms. We found that CD4+ T cells from NOD mice express CD49f, and old non-diabetic NOD mice had an increase of CD4+CD49f+ T cells in the spleen and peripheral lymph node when compared to both young and diabetic mice. This study was conducted to further characterize CD4+CD49f+ Treg cell subpopulation in NOD mice. It was found that CD4+CD49f+T cells possess suppressive ability and only one third of CD4+CD49f+ T cells expressing CD25. Based on the expression of CD49f and CD25, CD4+ T cells was divided into four populations , CD25+CD49f+ ,CD25+CD49f- ,CD25-CD49f+ but CD25-CD49f- are of suppressive ability, and we further found that Foxp3 expression was highly correlated with the suppressive ability of these three Treg populations. In conclusion our data indicate that CD49f marks a CD4+ CD25+ Treg subset with more potent suppression activity and identifies a CD25-CD4+ T cell population with suppression function in a Foxp3+ expression dependent manner. We divided CD4+ T cells into four populations: CD25+CD49f+, CD25+CD49f-, CD25-CD49f+, CD25-CD49f-; Microarray technology was used to determine gene expression differences among these four groups.

2012-05-09 | E-GEOD-30503 | biostudies-arrayexpress

Non-classical CD4+CD49b+ regulatory T cells as a better alternative to conventional CD4+CD25+ T cells to dampen arthritis severity

Project description:Regulatory T (Treg) cells actively control pathological immune responses and immunotherapeutic strategies triggering an increase in the number and/or the function of endogenous Treg cells emerge as a promising therapeutic strategy in autoimmune diseases to restore tolerance. A remarkable heterogeneity in peripheral Treg cells has been evidenced and underscored the need to better characterize them and compare their suppressive function to determine which Treg subset will be optimally suitable for a given clinical situation. We demonstrated that repetitive injections of immature dendritic cells (DC) expand FoxP3-negative CD49b+ Treg cells that display an effector memory phenotype. Transcriptome analysis of ex-vivo isolated Treg-expanded by DC injections contains multiple transcripts of the canonical Treg signature shared mainly by CD25+ but also by other Treg subphenotypes. We provided an in-depth characterization of the CD49b+ Treg cells phenotype underscoring their similarities with CD25+ Treg cells and highlighting some specific expression pattern for several markers including LAG3, KLRG1, CD103, ICOS, CTLA-4 and GZB. Comparison of their suppressive mechanism in vitro and in vivo with that of FoxP3-positive Treg cells provide evidence of their potent suppressive activity in vivo, partly dependent on IL-10 secretion. Altogether our results underscore the therapeutic potential of IL-10 secreting CD49b+ Treg cells in arthritis and strongly suggest that expression of several canonical markers and suppressive function could be FoxP3-independent All gene expression profiles were obtained from highly purified T cell populations sorted by flow cytometry. To reduce variability, cells from multiple mice were pooled for sorting, and two to three replicates were generated for all groups. RNA from 2.5-10 x 105 cells was amplified, labeled, and hybridized to Affymetrix M430v2 microarrays.

2015-12-10 | E-GEOD-68621 | biostudies-arrayexpress

Murine CD4+ T cells from DEREG mice expressing GFP under the control of the FoxP3 promotor

Project description:Naturally occurring CD25+CD4+ regulatory T cells (T reg cells) are currently intensively characterized because of their major importance in modulating host responses to tumors and infections, in preventing transplant rejection, and in inhibiting the development of autoimmunity and allergy. Originally, CD4+ T reg cells were identified exclusively by the constitutive expression of CD25, and many in vivo experiments have been performed using depleting antibodies directed against CD25. However, both the existence of CD25– T reg cells, especially within peripheral tissues, as well as the expression of CD25 on activated conventional T cells, which precludes discrimination between T reg cells and activated conventional T cells, limits the interpretation of data obtained by the use of anti-CD25 depleting antibodies. The most specific T reg cell marker currently known is the forkhead box transcription factor Foxp3, which has been shown to be expressed specifically in mouse CD4+ T reg cells and acts as a master switch in the regulation of their development and function. To address the question of the in vivo role of T reg cells in immunopathology, we have generated bacterial artificial chromosome (BAC)–transgenic mice termed depletion of regulatory T cell (DEREG) mice, which express a diphtheria toxin receptor (DTR) enhanced GFP (eGFP) fusion protein under the control of the foxp3 locus, allowing both detection and inducible depletion of Foxp3+ T reg cells. The gene expression profile of both CD4+eGFP+FoxP3+ and CD4+eGFPnegFoxP3neg cells isolated from DEREG mice was here analyzed by micro array. Keywords: DEREG, FoxP3, FoxP3-EGFP, mouse, regulatory T cell, CD4

2009-10-03 | GSE18387 | GEO

Transcriptional correlates of FOXP3 expression in suppressive and non-suppressive primary human Treg cell clones.

Project description:Analysis of the transcriptional correlates of FOXP3 expression in suppressive and non-suppressive primary human Treg cell clones. Individual CD4+CD25High or Cd4+CD25- T cells were isolated from human PBMCs and expanded in vitro. After 3 weeks of expansion, individual clones were analysed for FOXP3 expression and in vitro suppressive activity against freshly sorted allogeneic effector T cells. This study analyses the total RNA isolated from FOXP3+ clones with suppressive potency to their non-suppressive counterparts. The resutls of this study should provide insights into the molecular pathways linking FOXP3 expression to distinct aspects of Treg phenotype and function. Total RNA obtained from individual clones of primary human regulatory and effector CD4+T cells.

2015-05-06 | E-GEOD-65650 | biostudies-arrayexpress

Integrin alpha-6 (CD49f) defines a novel and distinct subset of CD4+ regulatory T cells with potent suppression activity.

Project description:A common method used both in vitro and in vivo, to identify Tregs in CD4+ T cells is through the characterization of surface marker CD25. Although CD25 expression is well correlated with regulatory activity in vitro, CD4+CD25+ T cells are not the only regulatory CD4+ T cells in vivo. Studies suggest that in many situations, CD4+CD25– T cells are as effective as CD4+CD25+ T cells in controlling T cell mediated disease. Therefore, CD25 is not a uniquely specific cell surface marker for the identification of Tregs. CD49f is an α6-integrin subunit which dimerizes with either the β 1 or β 4 subunit to form receptors for various laminin isoforms. We found that CD4+ T cells from NOD mice express CD49f, and old non-diabetic NOD mice had an increase of CD4+CD49f+ T cells in the spleen and peripheral lymph node when compared to both young and diabetic mice. This study was conducted to further characterize CD4+CD49f+ Treg cell subpopulation in NOD mice. It was found that CD4+CD49f+T cells possess suppressive ability and only one third of CD4+CD49f+ T cells expressing CD25. Based on the expression of CD49f and CD25, CD4+ T cells was divided into four populations , CD25+CD49f+ ,CD25+CD49f- ,CD25-CD49f+ but CD25-CD49f- are of suppressive ability, and we further found that Foxp3 expression was highly correlated with the suppressive ability of these three Treg populations. In conclusion our data indicate that CD49f marks a CD4+ CD25+ Treg subset with more potent suppression activity and identifies a CD25-CD4+ T cell population with suppression function in a Foxp3+ expression dependent manner.

2012-05-10 | GSE30503 | GEO

Non-classical CD4+CD49b+ regulatory T cells as a better alternative to conventional CD4+CD25+ T cells to dampen arthritis severity

2015-12-10 | GSE68621 | GEO

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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