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Global chromatin accessibility of gene locus in CD4+ T cells activated with or without OX40 costimulation

ABSTRACT: Global chromatin accessibility of gene locus in CD4+ T cells activated with or without OX40 costimulation

PROVIDER: PRJNA471813 | ENA |

REPOSITORIES: ENA

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Global chromatin accessibility of gene locus in CD4+ T cells activated with or without OX40 costimulation

Project description:OX40 is a T cell costimulatory molecule in the tumor necrosis factor receptor (TNFR) superfamily. Unlike other costimulatory molecules, OX40 is not expressed by naive T cells, but its expression is rapidly induced following T cell activation, and OX40 costimulation plays a critical role in cell survival, proliferation, and generation of memory cells. We used ATAC-seq to detail the chromatin accessibility of gene locus of activated CD4 T cells with or without OX40 costimulation in the presence of TGF-β1 and IL-2 and identified distinct classes of genes after OX40 costimulation.

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Expression data from C57/Bl6 Wt mice CD4+ T cells after activation with anti-CD3 plus Wt APC or OX40L-Tg APC

Project description:OX40 is a T cell costimulatory molecule in the tumor necrosis factor receptor (TNFR) superfamily. Unlike other costimulatory molecules, OX40 is not expressed by naive T cells, but its expression is rapidly induced following T cell activation, and OX40 costimulation plays a critical role in cell survival, proliferation, and generation of memory cells. We used microarrays to detail the global programme of gene expression of activated CD4 T cells underlying OX40 costimulation and identified distinct classes of up-regulated genes after OX40 costimulation.

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Project description:microRNA transcriptional profiling of human naïve CD4 T cells comparing cells that saw no activation, only anti-CD3 or anti-CD3 and anti-CD28 to identify microRNAs specifically upregulated by CD28-mediated costimulation. Three conditions experiment. PBS, anti-CD3, anti-CD3 + anti-CD28 all compared to a reference sample. Biological triplicates, independently extracted and activated.

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Project description:We determined differentially regulated gene expression profile in CD4 naïve T cells cultured in presence or absence of Th17 inducing cytokines (IL23+IL1β) and anti-CD28. We reported that CD28 costimulation induced Th17-suppressive gene signature.

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Expression data from CD4+ and CD11c+ cells from DO11.10 RAG2-/- mice

Project description:Abatacept is a recombinant CTLA-4 moleculed fused to a mutated human IgG molecule, which is clinically used in rheumatoid arthritis by inhibiting CD28-costimulation. This study aimed to inverstigate the ability of abatacept -mediated costimulation blockade to induce antigen-specific tolerance during primary immune responses. This is important as some studies have suggested that costimulation blockade can lead to CD4+ T cell anergy which could be beneficial for early therapy of autoimmune diseases such as rheumatoid arthritis. In addition we also investigated the effect that abatacept has on CD11c+ antigen presenting cells. This is important as costimulation blocakde can affect the biderectional interaction between CD4+ T cells and CD11c+ cells influencing the immunological outcome. We used microarrays to identify if abatacept treatment leads to antigen specific anergy using transgenic animals and models of priming and oral tolerance that established a synchronised monoclonal response. In addition this magnified the effect on the CD11c+ antigen presenting cells. This study included 5 experimental groups. DO11.10 RAG2-/- mice have CD4+ T cells specific for the ovalbumin (OVA) peptide OVA323-339. These mice were immunised with CFA/OVA s.c. (primed group) or tolerised by feeding with OVA (50mg/kg) in the drinking water. CD4+ cells were isolated 10 days post immunisation from draining lymph nodes (LNs) of unimmunised (pooled LNs and Spleen), orally tolerised (mesenteric LNs), primed (axillary LNs), primed treated with control IgG (axillary LNs) and primed treated with abatacept (axillary LNs). For CD11c+ cells cells were isolated by pooled secondary lymphoid organs (LNs and spleen).

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