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Tregs from Bcl11b-deficient versus wild type Tregs (CD4Cre and Foxp3Cre systems)

ABSTRACT: expression profile in Bcl11b-deficient Treg cells versus wild type Treg cells Treg cells sorted from Bcl11bF/F/Cd4Cre/Foxp3-GFP+ mice and wild type Foxp3-GFP+ mice Treg cells sorted from Bcl11bF/F/Foxp3Cre mice and wild type mice RNA extracted from sorted Bcl11b-deficient Foxp3-GFP Treg cells form Bcl11bF/F/Cd4Cre/Foxp3-GFP+ mice and wild type Foxp3-GFP Treg cells; expression profile by microarray analysis RNA extracted from sorted Bcl11b-deficient Treg cells form Bcl11bF/F/Foxp3Cre mice and wild type Treg cells; expression profile by microarray analysis

ORGANISM(S): Mus musculus

SUBMITTER: dorina avram

PROVIDER: E-GEOD-30523 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Tregs from Bcl11b-deficient versus wild type Tregs (CD4Cre and Foxp3Cre systems)

Project description:expression profile in Bcl11b-deficient Treg cells versus wild type Treg cells Treg cells sorted from Bcl11bF/F/Cd4Cre/Foxp3-GFP+ mice and wild type Foxp3-GFP+ mice Treg cells sorted from Bcl11bF/F/Foxp3Cre mice and wild type mice

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Non-classical action of Ku70 promotes Treg suppressive function through a FOXP3-dependent mechanism in lung adenocarcinoma

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TIGIT+ Tregs

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2014-12-12 | E-GEOD-56299 | biostudies-arrayexpress

SMART-Seq analysis to understand the differences between WT and SRC-3-/- Tregs transcriptome

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MicroRNA profiling of mouse T regulatory cells (Tregs) reveals miRNA disruption in Tregs leads to uncontrolled autoimmunity

Project description:A new Treg-specific, FoxP3-GFP-hCre BAC transgenic was crossed to a conditional Dicer knock-out mouse strain to analyze the role of microRNAs (miRNA) in the development and function of regulatory T cells (Tregs). Although thymic Tregs developed normally in this setting, the cells showed evidence of altered differentiation and dysfunction in the periphery. Dicer-deficient Treg lineage cells failed to remain stable as a subset of cells down-regulated the Treg-specific transcription factor, FoxP3, while the majority expressed altered levels of multiple genes and proteins (including Neuropilin 1, GITR and CTLA-4) associated with the Treg fingerprint. In fact, a significant percentage of the Treg lineage cells took on a Th memory phenotype including increased levels of CD127, IL-4, and interferon-g. Importantly, Dicer-deficient Tregs lost suppression activity in vivo; the mice rapidly developed fatal systemic autoimmune disease resembling the FoxP3 knockout phenotype. These results support a central role for miRNAs in maintaining the stability of differentiated Treg function in vivo and homeostasis of the adaptive immune system. Experiment Overall Design: Lymph node CD4+YFP+ T cells from FoxP3-GFP-hCre x ROSA26R-YFP Dicerwt/lox (Het) and FoxP3-GFP-hCre x ROSA26R-YFP Dicerlox/lox (KO) mice were isolated by flow cytometry. Triplicate GeneChips were used for each T cell population.

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Bcl11b prevents catastrophic autoimmunity by controlling multiple aspects of regulatory T-cell gene expression program [ChIP-Seq]

Project description:In order to identify Bcl11b-bound sites in Treg cells(WT) and Tn cells and to determine Bcl11n and Foxp3 peak overlaps, we performed Bcl11b and Foxp3 ChIP-seq on respective cell populations. In order to understand whether Bcl11b recruitment to it's target sites is dependent on Foxp3 we performed Bcl111b ChIP-Seq in Tfn cells(derived from Foxp3GFPKO mice). Finally, to ask whether genome-wide occupancy of Foxp3 is affected in the absence of Bcl11b, we performed Foxp3 ChIP-seq in Bcl11b-deficient Treg cells(KO Treg).

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Project description:T-regulatory (Treg) cells are important to immune homeostasis, and Treg cell deficiency or dysfunction leads to autoimmune disease. An histone/protein acetyltransferase (HAT), p300, was recently found important for Treg function and stability, but further insights into the mechanisms by which p300 or other HATs affect Treg biology are needed. Here we show that CBP, a p300 paralog, is also important in controlling Treg function and stability. Thus, while mice with Treg-specific deletion of CBP or p300 developed minimal autoimmune disease, the combined deletion of CBP and p300 led to fatal autoimmunity by 3-4 weeks of age. The effects of CBP and p300 deletion on Treg development are dose-dependent, and involve multiple mechanisms. CBP and p300 cooperate with several key Treg transcription factors that act on the Foxp3 promoter to promote Foxp3 production. CBP and p300 also act on the Foxp3 CNS2 region to maintain Treg stability in inflammatory environments by regulating pCREB function and GATA3 expression, respectively. Lastly, CBP and p300 regulate the epigenetic status and function of Foxp3. Our findings provide insights into how HATs orchestrate multiple aspects of Treg development and function, and identify overlapping but also discrete activities for p300 and CBP in control of Treg cells. RNA from three independent samples from magnetically separated CD4+CD25+ Treg of fl-p300/Foxp3cre mice and fl-CBP/Foxp3cre, compared to wild type (Foxp3cre) control (all C57Bl/6 background).

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