Expression data from LMP1-B cells
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ABSTRACT:
PROVIDER: PRJNA428296 | ENA |
REPOSITORIES: ENA
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Project description:In this study, by microarray we analyzed gene expression changes due to LMP1 signaling in B cells, in order to identify candidate co-stimulatory ligands that may account for the ability of LMP1-B cells to induce cytotoxic CD4+ T cell response. The identified candidate co-stimulatory ligands were further validated by other functional assays.
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Project description:RNA-seq was used to characterize the LMP1 mediated regulation of host target gene regulation. Here, we stably expressed doxycycline-induced HA-tagged wildtype (WT) LMP1 or TES1 mutant (TES1m) oe TES2 mutant(TES2m) in GM12878 LCL. We then depleted LMP1 from these cells using CRISPR-Cas9 approach and treated the cells with 400ng/ml of doxycycline to induce expression of WT, TES1m or TES2m LMP1 to rescue from the LMP1 depletion mediated effects (including loss of cell viability) to understand and differenciate the role of LMP1 TES1 vs TES2 domains in LCL.
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Project description:In this study, by microarray we analyzed gene expression changes due to LMP1 signaling and CD40 signaling in B cells, in order to identify similarly as well as differentially induced candidate tumor-associated antigens (TAAs) and co-stimulatory ligands.
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Project description:The Epstein Barr virus (EBV) encoded latent membrane protein-1 (LMP1) is a functional homologue of the tumor necrosis factor receptor family and contributes substantially to the oncogenic potential of EBV through activation of Nuclear Factor-kappaB (NF-kappaB). MicroRNAs (miRNAs) are a class of small RNA molecules that are involved in the regulation of cellular processes such as growth, development, and apoptosis, and have recently been linked to cancer phenotypes. Through miRNA microarray analysis, we demonstrate that LMP1 dysregulates the expression of several cellular miRNAs, including the most highly regulated of these, miR-146a. Quantitative RT-PCR analysis confirmed induced expression of miR-146a by LMP1. Analysis of miR-146a expression in EBV latency type III and type I cell lines revealed substantial expression of miR-146a in type III (which express LMP1) but not in type I cell lines. Reporter studies demonstrated that LMP1 induces miR-146a predominantly through two NF-kappaB binding sites in the miR-146a promoter and identified a role for an OCT-1 site in conferring basal and induced expression. Array analysis of cellular mRNAs expressed in Akata cells transduced with an miR-146a expressing retrovirus identified genes that are directly or indirectly regulated by miR-146a, including a group of interferon responsive genes that are inhibited by miR-146a. Since miR-146a is known to be induced by agents that activate the interferon response pathway (including LMP1), these results suggest that miR-146a functions in a negative feedback loop to modulate the intensity and/or duration of the interferon response. Keywords: microRNA expression modified by EBV encoded oncogene, LMP1
2008-01-09 | GSE10105 | GEO
Project description:Gene expression profile of splenic B cells (CD19+) from transgenic mice expressing the Epstein-Barr virus (EBV) latent membrane proteins (LMP) 1 and/or LMP2A. Freshly harvested primary B cells were profiled. B lymphocytes from transgenic LMP1, LMP2A, LMP1/2A mice and negative littermates were profiled from 6 month old adult mice; lymphoma cells were passaged in SCID mice and profiled for three LMP1 positive lymphomas and one negative lymphoma. 12 total samples. 4 transgenic B lymphocyte samples pooled from multiple biological replicates were hybridized to duplicate microarrays: LMP1 (pooled from 2 replicates), LMP2A (pooled from 3 replicates); LMP1/2A (pooled from 5 replicates), negative littermates (pooled from 4 replicates). 3 biological replicates of LMP1 lymphomas expressing high, medium and low levels of LMP1 and; 1 negative lymphoma was hybridized to 1 microarray chip. The reference sample consisted of 4 biological replicates of splenic B cells (CD19+) pooled from 4-7 month old non-transgenic Balb/c mice. The same reference was used for all hybridizations.
2012-09-01 | E-GEOD-38954 | biostudies-arrayexpress
Project description:The Epstein Barr virus (EBV) encoded latent membrane protein-1 (LMP1) is a functional homologue of the tumor necrosis factor receptor family and contributes substantially to the oncogenic potential of EBV through activation of Nuclear Factor-kappaB (NF-kappaB). MicroRNAs (miRNAs) are a class of small RNA molecules that are involved in the regulation of cellular processes such as growth, development, and apoptosis, and have recently been linked to cancer phenotypes. Through miRNA microarray analysis, we demonstrate that LMP1 dysregulates the expression of several cellular miRNAs, including the most highly regulated of these, miR-146a. Quantitative RT-PCR analysis confirmed induced expression of miR-146a by LMP1. Analysis of miR-146a expression in EBV latency type III and type I cell lines revealed substantial expression of miR-146a in type III (which express LMP1) but not in type I cell lines. Reporter studies demonstrated that LMP1 induces miR-146a predominantly through two NF-kappaB binding sites in the miR-146a promoter and identified a role for an OCT-1 site in conferring basal and induced expression. Array analysis of cellular mRNAs expressed in Akata cells transduced with an miR-146a expressing retrovirus identified genes that are directly or indirectly regulated by miR-146a, including a group of interferon responsive genes that are inhibited by miR-146a. Since miR-146a is known to be induced by agents that activate the interferon response pathway (including LMP1), these results suggest that miR-146a functions in a negative feedback loop to modulate the intensity and/or duration of the interferon response. Keywords: microRNA expression modified by EBV encoded oncogene, LMP1 EBV negative Mutu E1dn Cl. 3 cells were transduced with either a control retrovirus (pEhyg) or an LMP1 containing retrovirus (pEhyg-FLAG-LMP1). Cells were selected with hygromycin for approximately 2 weeks afterwhich 5 pairs of RNA preps were carried out on 5 successive days. Arrays GSM255656 and GSM255659 are dye swaps in which LMP1 samples were labeled with Cy3 and control samples were labeled with Cy5.
2010-05-26 | E-GEOD-10105 | biostudies-arrayexpress
Project description:In this study, we have investigated the effect of LMP1 on gene expression in normal human GC B cells using a non-viral vector based system Experiment Overall Design: Gene expression was compared between LMP1-transfected and control vector-transfected GC B cells from three patients. RNA from the FACS-sorted transfected GC B cells was amplified. 10ug of fragmented cRNA was hybridized to HG-U133 Plus 2.0 microarrays. Differentially expressed genes were identified using significance analysis of microarrays (SAM) with a 1.5 fold change threshold and the q-value threshold set to 5%.
2008-10-26 | E-GEOD-10821 | biostudies-arrayexpress
Project description:Non-transformed LMP1 expressing mouse B cells or mouse LMP1 lymphomas were analysed by RNA-sequencing
2020-06-02 | GSE136071 | GEO
Project description:Gene expression profile of splenic B cells (CD19+) from transgenic mice expressing the Epstein-Barr virus (EBV) latent membrane proteins (LMP) 1 and/or LMP2A. Freshly harvested primary B cells were profiled. B lymphocytes from transgenic LMP1, LMP2A, LMP1/2A mice and negative littermates were profiled from 6 month old adult mice; lymphoma cells were passaged in SCID mice and profiled for three LMP1 positive lymphomas and one negative lymphoma.
2012-09-01 | GSE38954 | GEO