RNA sequencing of CD57+ and CD57- effector memory CD8 T cells in patients with type 1 diabetes
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PROVIDER: PRJEB26462 | ENA |
REPOSITORIES: ENA
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Project description:Type 1 diabetes is an autoimmune disease in which insulin-secreting β cells of the pancreatic islets are selectively destroyed. CD8 T cells are regarded as critical players in mediating β cell destruction and as a result, considerable effort has been expended to define CD8 T cell behaviour in this disease. The overarching aim of the experiment is to characterize a recently identified autoreactive CD57-positive CD8 T cell subset which is associated with loss of function of islet beta cells in type 1 diabetes, to compare the phenotype of the CD57-positive effector memory CD8 T cells versus the CD57-negative compartment, and provide an insight into the function of these cells in the disease process. To that aim, HLA-A*24 positive patients with T1D -within 2 years of diagnosis- were asked to provide a blood, and following consent, and PBMC were isolated. CD57-positive and CD57-negative CD8 T cell populations were sorted by FACS, and finally, RNA was extracted. Amplified cDNA was obtained and used for the library preparation.
2018-08-03 | E-MTAB-6727 | biostudies-arrayexpress
Project description:In this work, we investigated the frequency and oligoclonal expansion of effector CD28-CD57+ memory cells in CD8+ T cell compartments and the T-cell Receptor (TCR) Vβ repertoire in acquired aplastic anemia (AA) to provide additional evidence to the immune hypothesis in AA pathophysiology. Using flow cytometry, deep sequencing, and computational methods, we examined the blood of 32 AA patients and 29 appropriate controls for Vβ usage; eight of these patients showing CD8+CD57+ expansion and three healthy subjects were subjected to TCR deep sequencing to confirm the clonality. We showed that CD8+CD57+ cells were frequently expanded with oligoclonal characteristics in AA, and patients and healthy donors shared CD8+ clonotypes by complementarity-determining region 3 sequences analysis.
2018-05-05 | GSE101660 | GEO
Project description:During a T cell response, naïve CD8 T cells differentiate into effector cells. Subsequently, a subset of effector cells termed memory precursor effector cells (MPECs) further differentiates into functionally mature memory CD8 T cells. The transcriptional network underlying this carefully scripted process is not well understood. Here, we report that the transcription factor FoxO1 plays an integral role in facilitating effector to memory transition and functional maturation of memory CD4 and CD8 T cells. We find that FoxO1 is not required for differentiation of effector cells, but in the absence of FoxO1, memory CD8 T cells displayed features of scenescence and progressive attrition in polyfunctionality, which in turn led to impared recall responses and poor protective immunity. These data suggest that FoxO1 is essential for active maintenance of functional CD8 T cell memory and protective immunity. Under competing conditions in bone marrow Single-cell suspensions from splenocytes of eight samples WT (control) and FoxO1-/- (experimental) LCMV-immune mice were prepared using standard procedures. CD8 T cells were then isoloated using Thy1.2 (CD90.2) (30-H12) microbeads (Miltenyi Biotec). Cells were then stained with anti-CD8, anti-CD44 and Db/NP396 MHC class I tetramer. Activated (CD8+CD44hi), naive (CD8+CD44lo), and virus-specific CD8 T cells were sorted using FACSAria II instrument (BD Biosciences). The purity of the cells was >95%. Total RNA was extracted from the sorted cells by Trizol Reagent. RNA samples were reverse transcribed and Cy3-labeled cDNAs were hyrbidized to Agilent whole Mouse Genome Oligo Microarrays. Fluorscence signals were detected using Agilent's Microarray Scanner system, data was analyzed using the Rosetta Resolver gene expression data analysis system and genes with a fold change < and p-values <0.01 were identified. Microarray data discussed in the paper is focused on virus-specific memory CD8 T cells from samples WT_Tet_2 vs KO_Tet_2.
2013-06-25 | E-GEOD-45673 | biostudies-arrayexpress
Project description:Memory T cells are heterogeneous in terms of their phenotype and functional properties. We investigated the molecular profiles of human CD8 naïve (TN), central memory (TCM), effector memory (TEM), and effector memory RA (TEMRA) T cells using gene expression microarrays and phospho-protein-specific intracellular flow cytometry. We demonstrate that TCM have a gene expression and cytokine signaling signature that lies between that of TN and TEM or TEMRA cells, whereas TEM and TEMRA are closely related. Our data define the molecular basis for the different functional properties of central and effector memory subsets. We show that TEM and TEMRA cells strongly express genes with known importance in CD8 T cell effector function. In contrast, TCM are characterized by high basal and cytokine-induced STAT5 phosphorylation, reflecting their capacity for self-renewal. Altogether, our results distinguish TCM and TEM/TEMRA at the molecular level and are consistent with the concept that TCM represent memory stem cells.
2005-01-01 | E-TABM-40 | biostudies-arrayexpress
Project description:Differentiation of CD8+ T lymphocytes into effector and memory cells is key for an adequate immune response and relies on complex interplay of pathways that convey signals from cell surface to nucleus. In this study, we fractionated four CD8+ T cell subtypes; naïve, recently activated effector, effector and memory cells into membrane, cytosol, soluble nucleus, chromatin-bound and cytoskeleton compartments. Using LC-MS/MS analysis, identified peptides were matched to human peptides/proteins (SwissProt). Compartment fractionation and gel-LC-MS separation identified 2399 proteins in total. Among these 735 were detected in all five, 241 in four, 257 in three, 368 in two and 798 found in only one fraction. Comparison between the two most different subsets, naïve and effector, yielded 146 significantly regulated proteins.
2016-02-29 | MSV000079540 | MassIVE
Project description:Gene Array Analysis of CD8+ CD57+ T cells in HIV Patients. Gene expression patterns of CD8+CD57+ T cells from healthy donors and HIV patients were compared. Gene expression patterns of CD8+CD57- T cells and CD8+CD57+ T cells were compared.
2005-07-30 | E-MEXP-393 | biostudies-arrayexpress
Project description:Expression profiles of in vitro generated CD8+ central memory (CM) and effector/effector memory (E/EM) T cells on Affymetrix GeneChip Murine Genome U74 Version 2 Set MG-U74A, MG-U74B, and MG-U74C. T cells were generated from female P14 T cell receptor transgenic mice on the C57Bl/6 genetic background.
2007-12-15 | E-GEOD-561 | biostudies-arrayexpress
Project description:The primary goal was to determine the phenotype of PD-1+CD57- CD8+ T cells compared to other CD8+ memory T cells based on single cell RNA sequencing. Peripheral blood mononuclear cells (PBMCs) from control and hypertensive samples were included. Secondary analyses include comparing gene expression changes in these cells between control and hypertensive individuals.
2023-05-02 | GSE212953 | GEO
Project description:Here we implemented a simple dendritic cell (DC)-mediated immunization approach to study the effects of commonly used adjuvants, Toll like receptor (TLR) ligands, on effector CD8 T cell differentiation and memory T cell development. To our surprise, we found that the TLR4 ligand LPS was far more superior to other TLR ligands in generating memory CD8 T cells upon immunization. LPS boosted clonal expansion similar to the other adjuvants, but fewer of the activated CD8 T cells died during contraction, generating a larger pool of memory cells. Intriguingly, monophosphoryl lipid A (MPLA), another TLR4 ligand, enhanced clonal expansion of effector CD8 T cells, but also promoted their terminal differentiation and contraction; thus, fewer memory CD8 T cells formed and MPLA-primed animals were less protected against secondary infection compared to those primed with LPS. Furthermore, gene expression profiling revealed that LPS-primed effector cells displayed a stronger pro-memory gene expression signature, whereas the gene expression profile of MPLA-primed effector cells had aligned closer with terminal effector CD8 T cells. Mice that contain small number of P14 CD8 T cells were immunized with DC-33 either alone or in combination with LPS or MPLA. KLRG1loIL-7Rhi MPECs were purified by FACS sort, and mRNA isolated from MPECs was subjected to whole-genome expression profiling using Illumina MouseWG-6 v2.0 Expression BeadChip.
2014-06-03 | E-GEOD-50764 | biostudies-arrayexpress
Project description:Memory CD8+ T cells are indispensable for maintaining long-term immunity against intracellular pathogens and tumors. Despite their presence in oxygen-deprived tissues of infection sites or tumors, the impact of local oxygen pressure on memory CD8+ T cells has remained largely unclear. We sought to elucidate how oxygen pressure impacted memory CD8+ T cells arising after infection with Listeria monocytogenes-OVA. Our data revealed that reduced oxygen pressure during in vitro culture switched CD8+ T cell metabolism from an OXPHOS to a glycolytic phenotype. Quantitative proteomic analysis showed that limiting oxygen conditions increased the expression of glucose transporters and components of the glycolytic pathway, while decreasing TCA cycle and mitochondrial respiratory chain proteins. The altered CD8+ T cell metabolism did not affect the expansion potential, but enhanced the granzyme B and IFN- production capacity. Memory CD8+ T cells cultured under low oxygen pressure were able to persist long-term in vivo and provided protection against bacterial rechallenge. Taken together, our study indicates that strategies of cellular immune therapy may benefit from reducing oxygen during culture to develop memory CD8+ T cells with superior effector functions .
2022-12-01 | PXD032236 | Pride