Human Gene Set: FUNG_IL2_SIGNALING_1

Standard name FUNG_IL2_SIGNALING_1
Systematic name M14139
Brief description Genes up-regulated by IL2 [GeneID=3558] in both primary thymocytes and T1 cells (primary thymocytes immortalized by Tax, an HTLV-1 encoded gene).
Full description or abstract Interleukin-2 (IL-2) mediates cell cycle progression and antiapoptosis in human T cells via several signal transduction pathways. The Tax protein of the human T-cell leukemia virus type I (HTLV-1) deregulates cell growth and alters the role of IL-2 in infected cells. However, Tax-immortalized cells stay dependent on IL-2, suggesting that events besides HTLV-1 gene expression are required for leukemia to develop. Here, IL-2-dependent and -independent events were analysed in a human T cell line immortalized by Tax. These studies show that, of the signaling pathways evaluated, only STAT5 remains dependent. Microarray analyses revealed several genes, including il-5, il-9 and il-13, are uniquely upregulated by IL-2 in the presence of Tax. Bioinformatics and supporting molecular biology show that some of these genes are STAT5 targets, explaining their IL-2 upregulation. These results suggest that IL-2 and viral proteins work together to induce gene expression, promoting the hypothesis that deregulation via the constitutive activation of STAT5 may lead to the IL-2-independent phenotype of HTLV-1-transformed cells.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 15735688   Authors: Fung MM,Chu YL,Fink JL,Wallace A,McGuire KL
Exact source Table 1: Genes upregulated by IL-2 in T1 and primary T cells
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Source species Homo sapiens
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Version history 3.0: First introduced

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