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Common features and differences in the transcriptome of large cell anaplastic lymphoma and classical Hodgkin lymphoma

ABSTRACT: Analysis of differential gene expression in human non-Hodgkin`s lymphoma cell lines and a primary leukaemic tumor sample of large cell anaplastic type in comparison with Hodgkin`s lymphoma cell lines and other non-Hodgkin`s lymphoma samples and non-neoplastic lymphocytes Keywords: cell type comparison

ORGANISM(S): Homo sapiens

PROVIDER: GSE4109 | GEO | 2006/03/31

SECONDARY ACCESSION(S): PRJNA94929

REPOSITORIES: GEO

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Transcription profiling of human large cell anaplastic lymphoma and classical Hodgkin lymphoma

Project description:Analysis of differential gene expression in human non-Hodgkin`s lymphoma cell lines and a primary leukaemic tumor sample of large cell anaplastic type in comparison with Hodgkin`s lymphoma cell lines and other non-Hodgkin`s lymphoma samples and non-neoplastic lymphocytes Experiment Overall Design: Samples were analyzed to be compared to publically available data sets

2008-06-13 | E-GEOD-4109 | biostudies-arrayexpress

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Transcription profiling of Hodgkin Lymphoma- and Anaplastic Large Cell Lymphoma-derived cell lines

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Dissection of acetylomic profiles in T cell lymphoma following histone deacetylases inhibition

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Inactivation of the putative ubiquitin-E3 ligase PDLIM2 in classical Hodgkin and anaplastic large cell lymphoma

Project description:Apart from its unique histopathological appearance with rare tumor cells embedded in an inflammatory background of bystander cells, classical Hodgkin lymphoma (cHL) is characterized by an unusual activation of a broad range of signaling pathways involved in cellular activation. This includes constitutive high-level activity of nuclear factor-κB (NF-κB), Janus kinase/signal transducer and activator of transcription (JAK/STAT), activator protein-1 (AP-1) and interferon regulatory factor (IRF) transcription factors (TFs) that are physiologically only transiently activated. Here, we demonstrate that inactivation of the putative ubiquitin E3-ligase PDLIM2 contributes to this TF activation. PDLIM2 expression is lost at the mRNA and protein levels in the majority of cHL cell lines and Hodgkin and Reed–Sternberg (HRS) cells of nearly all cHL primary samples. This loss is associated with PDLIM2 genomic alterations, promoter methylation and altered splicing. Reconstitution of PDLIM2 in HRS cell lines inhibits proliferation, blocks NF-κB transcriptional activity and contributes to cHL-specific gene expression. In non-Hodgkin B-cell lines, small interfering RNA-mediated PDLIM2 knockdown results in superactivation of TFs NF-κB and AP-1 following phorbyl myristate acetate stimulation. Furthermore, expression of PDLIM2 is lost in anaplastic large cell lymphoma (ALCL) that shares key biological aspects with cHL. We conclude that inactivation of PDLIM2 is a recurrent finding in cHL and ALCL, promotes activation of inflammatory signaling pathways and thereby contributes to their pathogenesis

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Transcription profiling of human lymphocyte-predominant Hodgkin lymphoma as revealed by global gene expression analysis

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Gene expression study of anaplastic large cell lymphomas: cellular origin, pathogenesis and relation to Hodgkin lymphoma

Project description:Anaplastic large cell lymphoma (ALCL) is a main type of T cell lymphomas and comprises three distinct entities: systemic ALK+, systemic ALK- and cutaneous ALK- ALCL. Little is known about their pathogenesis and their cellular origin, and morphological and immunophenotypical overlap exists between ALK- ALCL and classical Hodgkin lymphoma (cHL). We conducted gene expression profiling of microdissected lymphoma cells of ALK+ and ALK- systemic ALCL, cutaneous ALCL and cHL, and of eight subsets of normal T and NK cells. The analysis supports a derivation of ALCL from activated T cells, but the lymphoma cells acquired a gene expression pattern hampering an assignment to a CD4+, CD8+ or CD30+ T cell origin. Indeed, ALCL display a general down-modulation of T cell characteristic molecules. All ALCL types show significant expression of NFκB target genes and upregulation of genes involved in oncogenesis (e.g. EZH2). Surprisingly few genes are differentially expressed between systemic and cutaneous ALK- ALCL despite their different clinical behaviour, and between ALK- ALCL and cHL despite their different cellular origin. ALK+ ALCL are characterized by expression of genes regulated by pathways constitutively activated by ALK. This study provides multiple novel insights into the molecular biology and pathogenesis of ALCL.

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Alisertib in Combination With Vorinostat in Treating Patients With Relapsed or Recurrent Hodgkin Lymphoma, B-Cell Non-Hodgkin Lymphoma, or Peripheral T-Cell Lymphoma

Project description:This phase I trial studies the side effects and the best dose of alisertib when given together with vorinostat in treating patients with Hodgkin lymphoma, B-cell non-Hodgkin lymphoma, or peripheral T-cell lymphoma that has come back. Alisertib and vorinostat may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth.

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Classical Hodgkin lymphoma shows epigenetic features of an abortive plasma cellular differentiation: expression of Hodgkin vs. B-cell lines

Project description:Background Epigenetic changes are involved in the extinction of the B-cell gene expression program of classical Hodgkin lymphoma. However, little is known regarding epigenetic similarities between classical Hodgkin lymphoma and plasma cell myeloma cells, both of which share an extinction of the gene expression program of mature B-cells. Design and methods Global histone H3 acetylation patterns were determined in cell lines derived from classical Hodgkin lymphoma, plasma cell myeloma and B-cell lymphoma by chromatin immunoprecipitation and subsequent hybridization onto promoter tiling arrays. H3K27 trimethylation was analyzed by chromatin immunoprecipitation and real-time DNA-PCR for selected genes. Epigenetic modifications were compared to gene expression data. Results B-cell characteristic genes were hypoacetylated in classical Hodgkin lymphoma and plasma cell myeloma cell lines, as demonstrated by comparison of their histone H3 acetylation patterns to those of B-cell lines. However, the number of genes jointly hyperacetylated and expressed in classical Hodgkin lymphoma and plasma cell myeloma cell lines, such as IFR4/MUM1 and RYBP, is limited. Moreover, H3K27 trimethylation for selected B-cell characteristic genes revealed that this additional epigenetic silencing is much more prevalent in classical Hodgkin lymphoma as compared to plasma cell myeloma. Conclusion Our epigenetic data support the view that classical Hodgkin lymphoma is characterized by an abortive plasma cell differentiation with a down-regulation of B-cell characteristic genes but without activation of most plasma cell typical genes.

2011-05-05 | GSE21251 | GEO

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