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XBP-1 transduction of PEL

ABSTRACT: Transcription of human and KSHV genes in PEL following the transduction of spliced and unspliced XBP-1 Keywords: Cell type comparison

ORGANISM(S): Human gammaherpesvirus 8 Homo sapiens

PROVIDER: GSE9096 | GEO | 2007/09/28

SECONDARY ACCESSION(S): PRJNA102617

REPOSITORIES: GEO

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Homo sapiens

Project description:XBP-1 transduction of PEL

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Genome-wide mapping of RTA binding sites in KSHV+ PEL cells during KSHV reactivation.

Project description:Chromatin immunoprecipitation coupled with high-throughput sequencing (ChIP-seq) analysis was performed during Kaposi's sarcoma-associated herpesvirus (KSHV) reactivation in KSHV+ recombinant primary effusion B-cell lymphoma cells (PEL). RTA binding sites were identified genome-wide in a recombinant PEL cell line called TRExBCBL1-3xFLAG-RTA cells at 12 hours post-induction (hpi) of RTA expression.

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The Differentiation and Stress Response Factor, XBP-1, Drives Multiple Myeloma Pathogenesis

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Project description:Kaposi's sarcoma-associated herpesvirus (KSHV) is a human oncogenic virus, which maintains the persistent infection of the host by intermittently reactivating from latently infected cells to produce viral progenies. Here, we performed a comprehensive time course transcriptome analysis during KSHV reactivation in KSHV+ primary effusion B-cell lymphoma cells (PEL). For this we used a recombinant PEL cell line called TRExBCBL1-3xFLAG-RTA. The expression of the N-terminally 3xFLAG-tagged RTA was induced by adding 1 μg/ml doxycycline (Dox) to the medium. Total gene expression changes were identified in TRExBCBL1-3xFLAG-RTA cells at 0, 6, 12, and 24 hours post-induction (hpi).

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Ago HITS-CLIP in KSHV-infected primary effusion lymphoma (PEL) cell lines BCBL-1 and BC-3

Project description:We performed Ago HITS-CLIP to identify targets of viral and human miRNAs in latently KSHV-infected PEL cells

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Transcription profiling of mouse multiple myeloma tumors and splenic B cells from transgenics overexpressing XBP-1s

Project description:Multiple myeloma (MM) evolves from highly prevalent premalignant condition termed Monoclonal Gammopathy of Undetermined Significance (MGUS). We report an MGUS-MM phenotype arising in transgenic mice with Emu-directed expression of the unfolded protein/ER stress response and plasma cell development spliced isoform factor XBP-1s. Emu-XBP-1s elicited elevated serum Ig and IL-6 levels, skin alterations and with advancing age, a significant proportion of Emu-xbp-1s transgenic mice develop features diagnostic of human MM including bone lytic lesions. Transcriptional profiles of Emu-xbp-1s B lymphoid and MM cells show aberrant expression of genes known to be dysregulated in human MM including Cyclin D1, MAF, MAFB, and APRIL. This genetic model coupled with documented frequent XBP-1s overexpression in human MM serve to implicate chronic XBP-1s dysregulation in the development of this common and lethal malignancy. Experiment Overall Design: In this study, we have explored the biological impact of sustained XBP-1s expression in the lymphoid system, anticipating that this genetic event would be a necessary component along with other MM-relevant oncogenes and tumor suppressor gene manipulations to generate a MM-prone mouse model. Unexpectedly, XBP-1s overexpression alone yielded an MGUS-MM disease bearing many features classical of the human disease on the clinical, pathological and molecular levels. Experiment Overall Design: We performed expression analysis of B cells derived from the spleen of 20-week old Emu-xbp-1s mice (n=5) and non-transgenic mice (n=5). Additionally, we analyzed the expression profiles from MM tumor cells arising in Emu-xbp-1s mice (n=6).

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2012-10-05 | E-GEOD-41357 | biostudies-arrayexpress

Knockdown of KSHV viral interferon-regulatory factor 3 (vIRF-3) in primary effusion lymphoma (PEL) cells by RNA-Interference

Project description:Kaposi’s sarcoma-associated hepesvirus (KSHV) encodes four genes with homology to human interferon regulatory factors (IRFs). One of these IRFs, the viral interferon regulatory factor 3 (vIRF-3) is expressed in latently infected PEL cells and required for their continuous proliferation. Moreover, vIRF-3 is known to be involved in modulation of the type I interferon response. In order to identify cellular genes regulated by vIRF-3, cells from the PEL cell line BC-3 (KSHV positive) were transfected with either siRNAs targeted at vIRF-3 (si463 or si716s) or a negative control siRNA without homology to a known gene (siN, siNs).

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