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RNA-seq expression profiling of humain MAIT cells in blood and liver as compared to mainstream TCD4+ and TCD8+ cells.

ABSTRACT: RNA-seq expression profiling of humain MAIT cells in blood and liver as compared to mainstream TCD4+ and TCD8+ cells.

PROVIDER: PRJEB28200 | ENA |

REPOSITORIES: ENA

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RNA-seq expression profiling of humain MAIT cells in blood and liver as compared to mainstream TCD4+ and TCD8+ cells.

Project description:At variance with what is observed in mice, no distinct MAIT1 or MAIT17 subsets exist in human blood, as all MAIT cells express a variety of transcription factors such as Rorgt, Tbet, Eomes and Helios. However, they are also found in tissues in which they have specific effector functions. To determine these tissue programs, we analyzed the transcription pattern of MAIT cells as compared to mainstream memory (CD45RA-CD27+) CD4+ and CD8+ T cells from human blood and liver. The paired samples of blood and liver cells were obtained from patients operated for metastatic uveal melanoma (liver samples from a “healthy” liver fragment), and from the blood of healthy controls.

2018-12-03 | E-MTAB-7143 | biostudies-arrayexpress

Microarray expression profiling of NKT and MAIT subsets in different organs of B6-MAIT/CAST mice.

Project description:MAIT cells (MAITs) represent an abundant T lymphocyte subset with unique specificity for microbial metabolites presented by the MHC-1b molecule, MR1. MAIT conservation along evolution indicates important, non-redundant functions, but their low frequency in mice has hampered their detailed characterization. Here, we performed a transcriptomic analysis of murine MAITs in comparison with NKT subsets and with mainstream T cells in spleen and peripheral organs of B6-MAIT/CAST mice expressing a Rorc-GFP transgene. MAIT and NKT cells have been FACS-sorted after tetramer staining (MR1:5-OP-RU Tet+ for MAIT, CD1d:PBS57Tet+ for NKT), and 1/17 subsetting based on the expression of Rorc.

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Project description:To show the similarity among MAIT-iPSCs, hiPSCs and hESCs and the gradual change of global gene expression of reMAIT cells along with differentiation, this experiment was designed. MAIT cells, MAIT-iPSCs, hiPSCs, hESCs, MAIT cells, and reMAIT cells at the several differerent stages of differentiation were collected. Then, they were applied in this experiment.

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Project description:In mice, contrary to conventional T cells, MAIT cells acquire a memory phenotype in the thymus in relation with Zbtb16 expression (Savage et al., 2008 ; Koay et al., 2016). To define phenotypic transcriptional signatures of MAIT subsets in the thymus, we analyzed by microarray the transcriptome of MAIT1 (MR1tet+RORgt+) and MAIT17 (MR1tet+RORgt+) as compared to conventional mature (TCRb+CD24lo) CD4+ and CD8+ single positive cells.

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RNA sequencing of periheral CD4+ T cells and Mucosal associated invariant T cells (MAIT) cells from periphery blood

Project description:MAIT cells and CD8+ T cells from periphery blood were analysed and revealed altered transcriptome of MAIT cells compared to CD4+ T cells

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Project description:Mucosal associated invariant T (MAIT) cells are an abundant population of innate T cells that recognize bacterial ligands and play a key role in host protection against bacterial and viral pathogens. Upon activation, MAIT cells undergo proliferative expansion and increase their production of effector molecules such as cytokines. In this study, we found that mRNA and protein the abundance of the key metabolism regulator and transcription factor MYC was increased in stimulated MAIT cells. Using quantitative mass spectrometry, we identified the activation of two MYC controlled metabolic pathways, amino acid transport and glycolysis, both of which were necessary for MAIT cell proliferation. Finally, we showed that MAIT cells isolated from people with obesity showed decreased MYC mRNA abundance upon activation, which was associated with defective MAIT cell proliferation and functional responses. Collectively, our data uncovers the importance of MYC-regulated metabolism for MAIT cell proliferation and provides additional insight into the molecular basis for the functional defects of MAIT cells in obesity.

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