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Recruitment of FOXP1 to target genes in diffuse large B-cell lymphoma (DLBCL) cells

ABSTRACT: Identification of FOXP1 target genes in the OCI-Ly1 DLBCL cell line by ChIP-on-chip

ORGANISM(S): Homo sapiens

PROVIDER: GSE44243 | GEO | 2013/05/03

SECONDARY ACCESSION(S): PRJNA189234

REPOSITORIES: GEO

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Recruitment of FOXP1 to target genes in diffuse large B-cell lymphoma (DLBCL) cells

Project description:Identification of FOXP1 target genes in the OCI-Ly1 DLBCL cell line by ChIP-on-chip Three replicates of the FOXP1 ChIP-on-chip were performed in the OCI-Ly1 cells

2013-05-03 | E-GEOD-44243 | biostudies-arrayexpress

Retroviral overexpression or siRNA mediated knockdown of FOXP1 in DLBCL cell lines and primary human B cells

Project description:To provide insight into the role of and target genes of the transcription factor FOXP1 in mature human B cells and in B cell non-Hodkgin lymhomas, we performed gene expression microarray studies, upon ectopic overexpression or silencing of FOXP1 in these cells. human memory B cells from 2 separate donors were transduced with LZRS-FOXP1-IRES-YFP or LZRS-IRES-YFP (negative control); DLBCL cell lines OCI-Ly1, OCI-Ly7, and OCI-Ly10 were transduced with LZRS-FOXP1-IRES-YFP or LZRS-IRES-YFP (negative control); DLBCL cell lines OCI-Ly1, OCI-Ly7, and OCI-Ly10 were transiently transfected with siRNA targeting FOXP1 or sigenome non-targeting siRNA (negative control), using the Lonza nucleofection system.

2014-10-24 | E-GEOD-51382 | biostudies-arrayexpress

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Project description:To identify differentially expressed genes regulated by FOXP1 in DLBCL cells via gene expression profiling of GCB-DLBCL (DB, K422) and ABC-DLBCL (OCI-Ly3, HBL-1) cell lines treated with siRNA targeting FOXP1 or non-silencing siRNA control. Two GCB-DLBCL (DB, K422) and two ABC-DLBCL (OCI-Ly3, HBL-1) cell lines were each treated separately with two independent siRNA oligonucleotides targeting FOXP1 (siFOXP1_308, siFOXP1_309) or non-silencing siRNA (siCtrl). Biological replicates derived from three independent experiments were obtained, RNA-extracted and subsequently hybridized into a human microarray platform for gene expression profiling.

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Gene expression signatures for Ibrutinib resistance in Diffuse Large B-cell Lymphoma (ABC-DLBCL)

Project description:To understand the acquired resistance mechanism in DLBCL the cell lines (OCI-Ly1, Oci-Ly10 and HBL-1) were treated with Ibrutinib over time to generate resistant clone.

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Microarray expression profile of long noncoding RNAs in germinal center-like diffuse large B-cell lymphoma cell lines.

Project description:The contributions of long noncoding RNAs (lncRNAs) to the development of germinal center (GCB)-like diffuse large B-cell lymphoma (DLBCL) remain largely unknown. The aim of this study was to investigate the expression profile of lncRNAs in human GCB DLBCL cell lines (OCI-ly1 and OCI-ly19) and normal B lymphocytes by microarray. We demonstrated that 21,539 lncRNAs were expressed in all samples analyzed, of which 1,648 lncRNAs were upregulated and 2,671 lncRNAs were downregulated in GCB DLBCL cell lines (OCI-ly1 and OCI-ly19) (≥2.0-fold, P<0.05).

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Project description:High expression of the FOXP1 transcription factor distinguishes the highly aggressive Activated B Cell (ABC) type of Diffuse Large B Cell Lymphoma (DLBCL) from the more indolent Germinal Center (GCB) DLBCL subtype and is correlated with poor prognosis. A genetic or functional role for FOXP1 in lymphomagenesis and/or tumor maintenance, however, remains unknown. Here, we report that sustained expression of FOXP1 is necessary for ABC DLBCL cell line survival. Genome-wide transcript profiling reveals that FOXP1 acts directly and indirectly by enforcing expression of known ABC DLBCL hallmarks, including the classical NF-kappaB survival pathway. Our data further suggest that FOXP1 maintains the ABC subtype distinction by repressing gene expression programs dominant in GCB DLBCL and supports a model in which the target of ABC DLBCL transformation is a transitory cell type en route from the germinal center B cell to the terminally differentiated plasma cell.

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Project description:To understand the molecular curcuits perturbed by BET bromodoman inhibtion we obtained gene expression profiling of five DLBCL cell lines, SU-DHL6, OCI-Ly1, OCI-Ly4, Toledo and HBL-1, which were treated with either 500nM JQ1 or DMSO for 0,2,6,12,24 and 48hr.

2013-12-10 | GSE45630 | GEO

miRNA profiles of diffuse large B cell lymphoma (DLBCL) derived cell lines

Project description:miRNA profiling of human Diffuse Large B Cell Lymphoma (DLBCL) cell lines derived from the two main subtypes of this disease: Activated B Cell like (ABC-DLBCL) and Germinal Center B cell like (GCB-DLBCL), analyzing the 711 human miRNAs present in miRBase V10.0. Five ABC-like DLBCL cell lines (RIVA, Oci-Ly3, Oci-Ly10, HBL1 and U2932) and three GCB-like DLBCL cell lines (Oci-Ly7, Oci-Ly19 and SUDHL-6) were cultured in IMDM (Cellgro) with 20% human plasma, 1% penicillin/streptomycin/L-glutamine (Cellgro,) and 0,2% beta mercaptoethanol (Invitrogen). Total RNA was extracted from cell pellets using the mirVana™ miRNA Isolation Kit (Ambion), and sent to LC Sciences facility for microarray hybridization using microfluidics technology. FirstChoice® Human Skeletal Muscle Total RNA (Ambion) was used as common reference for all hybridizations. Background substracted and normalized data from each channel was used to calculate log ratios sample/reference. Keywords: miRNA profiling

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