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Gene expression profiles of canonical and non-canonical NF-κB signaling pathways in Hodgkin’s lymphoma

ABSTRACT: Malignant Hodgkin's lymphoma (HL) cells are characterized by constitutive activation of the canonical as well as the non-canonical NF-κB signaling cascades. We depleted subunit combinations corresponding to either canonical (p50/RelA) or non-canonical (p52/RelB) dimers in the HL cell line L-1236 and performed Affymetrix microarray analysis. Knockdown of p52/RelB affected the expression of a significantly higher number of genes than the knockdown of p50/RelA. The two sets of target genes presented a partial overlap, however they also revealed specific genes that are involved in distinct aspects of tumor biology.

ORGANISM(S): Homo sapiens

PROVIDER: GSE64232 | GEO | 2016/02/18

SECONDARY ACCESSION(S): PRJNA270499

REPOSITORIES: GEO

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Gene expression profiles of canonical and non-canonical NF-ÎºB signaling pathways in Hodgkinâs lymphoma

Project description:Malignant Hodgkin's lymphoma (HL) cells are characterized by constitutive activation of the canonical as well as the non-canonical NF-ÎºB signaling cascades. We depleted subunit combinations corresponding to either canonical (p50/RelA) or non-canonical (p52/RelB) dimers in the HL cell line L-1236 and performed Affymetrix microarray analysis. Knockdown of p52/RelB affected the expression of a significantly higher number of genes than the knockdown of p50/RelA. The two sets of target genes presented a partial overlap, however they also revealed specific genes that are involved in distinct aspects of tumor biology. The knockdown of subunit combinations corresponding to either canonical (p50/RelA, experimental group 1) or non-canonical (p52/RelB, experimental group 2) NF-ÎºB heterodimers were carried out in L-1236 cells. Two distinct siRNA sequences for every NF-ÎºB subunit and two non-targeting siRNA sequences (control) were used for each experimental group. Experiments were performed in biological triplicates.

2016-02-18 | E-GEOD-64232 | biostudies-arrayexpress

Gene expression profile of the NF-κB subunit p52 in Hodgkin’s lymphoma

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Project description:The malignant cells of Hodgkin's lymphoma are characterized by a constitutive activation of the canonical as well as the non-canonical NF-ÎºB signaling cascades. We carried out genome-wide localization and expression profiling experiments in the Hodgkin lymphoma cell line L1236 for the canonical and non-canonical NF-ÎºB pathway components p65, p50 and p52, RelB, respectively. We found that the single NF-ÎºB subunits bind to overlapping, but distinct cistromes by using consensus motifs of high similarity. ChIP-Seq analysis of 4 NF-ÎºB subunits with 2 biological replicates each

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Project description:Stringent regulation of TNF signaling prevents aberrant inflammation. TNF engages the canonical NF-kB pathway for activating the RelA:p50 heterodimer, which mediates specific expressions of pro-inflammatory and immune response genes. Importantly, the NF-kB system discriminates between time-varied TNF inputs. Negative feedback regulators of the canonical pathway, including IkBa, thought to ensure transient RelA:p50 responses to brief TNF stimulations. The noncanonical NF-kB pathway controls a separate RelB activity associated with immune differentiation. In a systems modeling approach, we uncovered an unexpected role of p100, a constituent of the noncanonical pathway, in TNF signaling. Brief TNF stimulation of p100-deficient cells produced an additional late NF-kB activity composed of the RelB:p50 heterodimer, which distorted the TNF-induced gene-expression program. Periodic TNF pulses augmented this RelB:p50 activity, which was reinforced by NF-kB-dependent RelB synthesis. In sum, the NF-kB system seems to engage distantly related molecular species for enforcing dynamical and gene controls of immune-activating TNF signaling.

2020-08-22 | GSE119961 | GEO

Transcriptomic analysis of EBV-negative Akata Burkitt Lymphoma Cell target genes upon CRISPR knockout of the individual NF-κB transcription factor as well as induction of wildtype LMP1 expression

Project description:RNA-seq was used to characterize the NF-κB transcription factor -mediated regulation of B-cell genome wide target genes upon inducible LMP1 expression . We created an inducible stable EBV-negative Akata Burkitt Lymphoma cell line expressing LMP1 wildtype followed by stable CRISPR knockout of the individual NF-κB transciption factors (p52, RelB, p50, cRel or RelA) and 24 hours 250ng/ml doxycycline-induced LMP1 expression.

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