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PDK1 is required for maintenance of CD4+ FoxP3+ regulatory T cell function [Hemizygous]

ABSTRACT: The goal of this study was to determine the effect of Treg-specific Pdpk1 (PDK1) deletion on the transcriptome of Treg cells. CD4+ YFP+ Treg cells from spleens and peripheral lymph nodes of hemizygous Foxp3 YFP-Cre/0 Pdpk1 +/+ (WT) and Foxp3 YFP-Cre/0 Pdpk1 FL/FL (KO) were sorted, RNA was isolated and RNA-seq libraries were constructed and sequenced by Hiseq2000. Note companion data set using Pdpk1-deleted Treg from Cre-heterozygous mice, which do not develop spontaneous inflammation.

ORGANISM(S): Mus musculus

PROVIDER: GSE163662 | GEO | 2021/02/11

REPOSITORIES: GEO

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PDK1 is required for maintenance of CD4+ FoxP3+ regulatory T cell function [heterozygous]

Project description:The goal of this study was to determine the effect of Treg-specific Pdpk1 (PDK1) deletion on the transcriptome of Treg cells in the absence of inflammatory conditions. CD4+ YFP+ Treg cells from spleens and peripheral lymph nodes of Cre-heterozygous Foxp3 YFP-Cre/+ Pdpk1 +/+ (WT) and Foxp3 YFP-Cre/+ Pdpk1 FL/FL (KO) were sorted, RNA was isolated and RNA-seq libraries were constructed and sequenced by Hiseq2500. Note companion data set using hemizygous Cre (induces spontaneous inflammation).

2021-02-11 | GSE163659 | GEO

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Project description:CD4+YFP+ Treg cells were sorted from the peripheral lymph nodes and spleens of Foxp3-Cre mice (8-10-weeks-old), Foxp3-Cre;Bim-fl/fl mice (8-10-weeks-old), or Foxp3-Cre mice (older than 18-months-old), respectively. Detailly, peripheral lymph nodes and spleens were harvested from mice, and grinded into single cells, then the CD4+-T cells were isolated by Mouse CD4 T Lymphocyte Enrichment Set-DM (BD Biosciences, 558131), followed with FACS sorting (SONY Cell Sorter, SH800S) to purify CD4+YFP+ Treg cells with purities >99%. RNA samples were prepared with the miRNeasy Mini Kit (Qiagen, 21704), then reverse transcribed, amplified, labeled (Affymetrix GeneChip pico kit, 703308), and hybridized to Clariom D Arrays, mouse (Affymetrix, 902931).

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Regulatory T cells require the phosphatase PTEN to restrain type 1 and follicular helper T-cell responses

Project description:The interplay between effector and regulatory T (Treg) cells is crucial for adaptive immunity, but how Treg control effector cell flexibility is elusive. We found that the phosphatase PTEN links Treg stability to the repression of TH1 and TFH (follicular helper) responses. Depletion of PTEN in Treg resulted in excessive TFH and germinal center responses and spontaneous inflammatory disease. These defects are considerably blocked by deletion of Interferon-γ, indicating coordinated control of TH1 and TFH responses. Mechanistically, PTEN maintains Treg stability and proper metabolic balance between glycolysis and mitochondrial fitness. Moreover, PTEN deficiency markedly upregulates mTORC2-Akt activity, and loss of this activity restores PTEN-deficient Treg function. Our studies establish a PTEN-mTORC2 axis that actively maintains Treg stability and coordinates Treg-mediated control of effector cell flexibility. We used microarrays to explore the gene expression profiles differentially expressed in CD4+CD25+Foxp3-YFP+ Treg cells from wild-type (WT; C57BL/6 crossed with Foxp3-Cre) and Ptenfl/flFoxp3-Cre (Ptenfl/fl mice crossed with Foxp3-Cre) mice

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Hydrogen Deuterium Exchange of PDK1

Project description:This project consisted of three HDX-MS experiments. First, we compared the dimeric PDK1(SKD-PIF) to monomeric PDK1(SKD) and mapped the differences in deuterium incorporation onto the dimer model. We then compared the deuterium incorporation kinetics for the kinase (PDK1(SKD)) and PH (PDK1(PH) domains of PDK1 with full-length PDK1 (PDK1(FL)) in pairwise experiments.

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Project description:LKB1 deficiency in Treg cells impairs their survival, metabolism and suppressive function. To exclude the impact of excessive inflammation on LKB1-deficient Treg cells, we generated mixed bone marrow (BM) chimeras using Foxp3-Cre WT and Foxp3-Cre Stk11 fl/fl BM cells, together with CD45.1+ BM cells. We used microarray to compare the global transcription profile of dornor-derived LKB1-deficient Tregs with WT counterparts.

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Gene expression analysis in murine lymphocyte subsets incubated with control or leukemia-derived extracellular vesicles

Project description:mRNA profiles of Treg, CD4+, CD8+, CD19+ splenic cells from 8-week-old Foxp3 YFP/cre mice incubated with control (WT) or leukemic (TCL1) extracellular vesicles (EV) were analyzed in triplicate.

2022-08-31 | GSE188898 | GEO

Treg specific Gata3 knock out array

Project description:The transcription factor Foxp3 is indispensible for the differentiation and function of regulatory T cells (Treg cells). To gain insights into the molecular mechanisms of Foxp3 mediated gene expression we purified Foxp3 complexes and explored their composition. Biochemical and mass-spectrometric analyses revealed that Foxp3 forms multi-protein complexes of 400-800 kDa or larger and identified 361 associated proteins ~30% of which are transcription-related. Foxp3 directly regulates expression of a large proportion of the genes encoding its co-factors. Reciprocally, some transcription factor partners of Foxp3 facilitate its expression. Functional analysis of Foxp3 cooperation with one such partner, Gata3, provided further evidence for a network of transcriptional regulation afforded by Foxp3 and its associates to control distinct aspects of Treg cell biology. Gene expression profile of Treg specific knock-out of Gata3 vs. their littermate controls were analyzed to gain insight into Gata3 dependendent genes in Treg cells. Treg cells (CD4+CD25+YFP+) sorted from Gata3F/FFoxp3YFP-Cre and Gata3F/+Foxp3YFP-Cre mice (three mice in each group) followed by microarray analyses.

2012-08-28 | E-GEOD-39864 | biostudies-arrayexpress

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