Project description:A hallmark of resistance to type I interferons (IFNs) is the lack of antiproliferative responses. Foser et al. 2006 have shown that costimulation with IFN-alpa and transforming growth factor beta-1 (TGF-beta) potentiates antiproliferative activity in a sensitive (ME15) and resistant (D10) human melanoma cell line. Gene induction by small concentration of interferon-alpha-2a (100 U/ml) was analyzed in human cancer cell lines with differences in sensitivity to IFN-alpha and TGF-beta. Among other antiproliferative genes we found upregulated IFITM3 gene expression levels and inducibility of this antiproliferative protein in interferon sensitive cell lines.
Project description:STAT1 plays a cental role in the induction of interferon-stimulated genes, but interferon alpha can activate a STAT1-independent pathway that leads to gene expression. We performed microarray analysis to examine whether like interferon alpha, interferon lambda, a newly discovered interferon, can induce the expression of interferon-stimulated genes in the absence of STAT1. Control and STAT1 knockout Huh-7.5 hepatoma cells were left untreated or treated with 1000 U/ml of human interferon alpha 2a or interferon lambda 1 (PBL) for 24 h, and total RNA was extracted. Sense-strand DNA was generated from 200 ng of total RNA, fragmented, and labeled using a GeneChip WT Plus Reagent Kit (Affymetrix). Six samples were obtained and each sample was anlyzed using one GeneChip.
Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.
