Unknown,Transcriptomics,Genomics,Proteomics

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Gene expression of TCR-alpha/beta CD4- CD8- human T cells


ABSTRACT: The origin and function of human double negative (DN) TCR-alpha/beta T cells is unknown. They are thought to contribute to the pathogenesis of systemic lupus erythematosus because they expand and accumulate in inflamed organs. Here we provide evidence that human TCR-alpha/beta CD4- CD8- DN T cells derive exclusively from activated CD8+ T cells. Freshly isolated TCR-alpha/beta DN T cells display a distinct gene expression and cytokine production profile. DN cells isolated from peripheral blood as well as DN cells derived in vitro from CD8+ T cells, produce a defined array of pro-inflammatory mediators that includes IL-1, IL-17, IFN-gama, CXCL3, and CXCL2. These results indicate that, upon activation, CD8+ T cells have the capacity to acquire a distinct phenotype that grants them inflammatory capacity. TCR-alpha-beta+ CD25- T cells from healthy human individuals were sorted into CD4+, CD8+, and CD4-CD8- T cells. Cell lysis and RNA extraction was performed immediately. RNA from each cell subset was pooled.

ORGANISM(S): Homo sapiens

SUBMITTER: Jose Crispin 

PROVIDER: E-GEOD-16130 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Human TCR-alpha beta+ CD4- CD8- T cells can derive from CD8+ T cells and display an inflammatory effector phenotype.

Crispín José C JC   Tsokos George C GC  

Journal of immunology (Baltimore, Md. : 1950) 20090904 7


The origin and function of human double negative (DN) TCR-alphabeta+ T cells is unknown. They are thought to contribute to the pathogenesis of systemic lupus erythematosus because they expand and accumulate in inflamed organs. In this study, we provide evidence that human TCR-alphabeta+ CD4- CD8- DN T cells can derive from activated CD8+ T cells. Freshly isolated TCR-alphabeta+ DN T cells display a distinct gene expression and cytokine production profile. DN cells isolated from peripheral blood  ...[more]

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