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Molecular characterization of CD8+ T cell with suppressive capacities

ABSTRACT: In the VILLIN-HA/CL4-TCR transgenic mouse model a population of CD8 T cells with suppressive capacities was indentified. For the molecular characterisation of CD8 regulatory T cells gene comparative expression profiles of naive, activated and regulatory CD8 T cells were performed.

ORGANISM(S): Mus musculus

PROVIDER: GSE14706 | GEO | 2009/07/01

SECONDARY ACCESSION(S): PRJNA112089

REPOSITORIES: GEO

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Molecular characterization of CD8+ T cell with suppressive capacities

Project description:In the VILLIN-HA/CL4-TCR transgenic mouse model a population of CD8 T cells with suppressive capacities was indentified. For the molecular characterisation of CD8 regulatory T cells gene comparative expression profiles of naive, activated and regulatory CD8 T cells were performed. Three population of CD8 T cells are included in the analysis. 1. CD8 T cells 2. in vivo activated CD8 T cells 3. in vivo generated CD8 regulatory T cells

2009-07-01 | E-GEOD-14706 | biostudies-arrayexpress

IL-12-induced immune suppressive deficit during CD8+ T-cell differentiation

Project description:Autoimmune diseases are characterized by regulatory deficit in both the CD4+ and CD8+ T-cell compartments. We have shown that CD8+ T-cells associated with acute relapse of multiple sclerosis are significantly deficient in their immune suppressive ability. We hypothesized that distinct CD8+ cytotoxic T-cell (Tc) lineages, determined by cytokine milieu during naïve T-cell differentiation, may harbor differential ability to suppress effector CD4+ T-cells. We differentiated purified human naïve CD8+ T-cells in vitro toward Tc0 (media control), Tc1 and Tc17 lineages. Using in vitro flow cytometric suppression assays, we observed that Tc0 and Tc17 cells had similar suppressive ability. In contrast, Tc1 cells showed significant loss of suppressive ability against ex vivo CD4+ T-cells and in vitro-differentiated Th0, Th1 and Th17 cells. Of note, Tc1 cells were also suboptimal in suppressing CD4-induced acute xenogeneic graft versus host disease (xGVHD) in vivo. Tc subtypes derived under various cytokine combinations revealed that IL-12-containing conditions resulted in less suppressive cells exhibiting dysregulated cytotoxic degranulation. RNASeq transcriptome analyses indicated differential regulation of inflammatory genes and enrichment in GM-CSF-associated pathways. These studies provide insights into the role of T-cell differentiation in CD8 suppressive biology and may reveal therapeutically targetable pathways to reverse suppressive deficit during immune-mediated disease.

2020-11-18 | GSE151204 | 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

Mus musculus

Project description:Molecular characterization of CD8+ T cell with suppressive capacities

| PRJNA112089 | ENA

Heterogeneous maintenance of human tissue resident memory T cells based on efflux capacities

Project description:Tissue-resident memory T cells (TRM) accelerate pathogen clearance through rapid and enhanced functional responses in situ. In humans, TRM cells are prevalent in diverse anatomic sites throughout the human lifespan, yet mechanisms for long-term maintenance are unknown. Here, we identify subpopulations of human TRM in mucosal and lymphoid sites based on differential efflux of mitochondrial dyes, with distinct transcriptional profiles, turnover, and functional capacities. TRM are enriched in efflux(+) populations compared with circulating memory CD8+T cells. Compared to efflux- TRM, efflux(+) TRM showed transcriptional and phenotypic features of quiescence including reduced turnover, decreased expression of exhaustion markers, and increased proliferative capacity and signaling to homeostatic cytokines. Moreover, efflux(+) and efflux(-) TRM subsets both maintain TRM characteristics when activated, while efflux(+) TRM produce IL-17 and efflux(-) produce higher levels of IFN-γ and IL-2. Our results suggest a model for cooperative maintenance of T cell immunity in tissues through interplay of subsets with complementary capacities for longevity and effector function.

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Anti-CD4 treatment increases tumor-suppressive IL18Rαhi CD8+ T cells

Project description:Anti-CD4 treatment increases tumor-suppressive IL18Rαhi CD8+ T cells

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RNA sequencing of in vitro generated suppressive myeloid cells using parental and Sialidase expressing A549 cancer cell lines

Project description:Fresh peripheral blood mononuclear cells of four human donors were cultured together with either lung adenocarcinoma A549 cancer cells or A549-expressing H1N1 Sialidase cancer cells. These treatments induced the differentiation of donor cells into immunosuppressive MDSC-like cells, which were further subjected to bulk RNA sequencing. Computational analysis of RNA-Seq profiles of these cells was applied to understand the differences in their suppressive capacities.

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Foxp3 enhancers synergize to maximize regulatory T cell suppressive capacity

Project description:Foxp3 enhancers synergize to maximize regulatory T cell suppressive capacity

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

2015-05-06 | GSE65650 | GEO

IL-12-induced immune suppressive deficit during CD8+ T-cell differentiation

Project description:IL-12-induced immune suppressive deficit during CD8+ T-cell differentiation

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