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ASCL1 chromatin binding in neuroblastoma cell lines [ChIP-seq]

ABSTRACT: To compare the ASCL1 protein binding to chromatin in two MYCN-amplified neuroblastoma cell contexts, we have used a doxycycline-inducible lentivirus system to induce ASCL1 overexpression in SK-N-BE(2)C and IMR-32 cell lines, and assessed ASCL1 binding using ChIP-seq.

ORGANISM(S): Homo sapiens

PROVIDER: GSE213247 | GEO | 2026/03/28

REPOSITORIES: GEO

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ASCL1 over-expression in neuroblastoma cell lines [RNA-seq]

Project description:To compare the function of overexpressed ASCL1 in two MYCN-amplified neuroblastoma cell contexts, we have used a doxycycline-inducible lentivirus system to induce ASCL1 overexpression in SK-N-BE(2)C and IMR-32 cell lines, and assessed the transcriptome wide impact of ASCL1 overexpression using RNA-seq.

2026-03-28 | GSE213430 | GEO

The proneural transcription factor ASCL1 regulates cell proliferation and primes for differentiation in neuroblastoma [RNA-Seq]

Project description:To compare the function of endogenous ASCL1 in different neuroblastoma cell contexts, we have used CRISPR-mediated deletion to compare the effects of ASCL1 deletion in a MYCN-amplified and an ALK-driven neuroblastoma line and assessed the transcriptome wide impact of ASCL1 knockout using RNA-seq

2022-08-31 | GSE202634 | GEO

The proneural transcription factor ASCL1 regulates cell proliferation and primes for differentiation in neuroblastoma [ATAC-seq]

Project description:To compare the function of endogenous ASCL1 in different neuroblastoma cell contexts, we have used CRISPR-mediated deletion to compare the effects of ASCL1 deletion in a MYCN-amplified and an ALK-driven neuroblastoma line and assessed the impact of ASCL1 knockout on chromatin accessiblity genome-wide using ATAC-seq

2022-08-31 | GSE202629 | GEO

ASCL1: a pioneer factor that induces subtype switching and characterizes adrenergic neuroblastoma

Project description:Neuroblastoma is an embryonic malignancy originating from early nerve cells. Neuroblastoma retains plasticity, interconverting between the mesenchymal (MES) and adrenergic (ADRN) states, which are controlled by different sets of transcription factors forming the core regulatory circuit (CRC). However, their functional roles and cooperative mechanisms in neuroblastoma pathogenesis are poorly understood. Here, we demonstrate that overexpression of ASCL1 in MES neuroblastoma cells opens closed chromatin at the promoters of key ADRN genes, accompanied by epigenetic activation and establishment of enhancer-promoter interactions, thereby initiating subtype switching. ASCL1 inhibits the TGFb-SMAD2/3 pathway but activates the BMP-SMAD1-ID3/4 pathway, serving as negative feedback to balance the function of ASCL1-TCF12 dimers. ASCL1 and other ADRN CRC members potentiate each other’s activity, increasing the expression of the original targets and inducing a new set of genes, thereby promoting conversion to ADRN neuroblastoma. Thus, via its pioneer factor function, ASCL1 serves as a master regulator that characterizes ADRN neuroblastoma.

2023-12-08 | PXD037670 | Pride

ASCL1 is directly activated by the LMO1 and MYCN oncogenes and is a master regulator of the differentiation program in neuroblastoma

Project description:Neuroblastoma is an embryonal tumor of the peripheral sympathetic nervous system. Elevated expression of the transcription factor LMO1 and the polymorphisms within this gene are associated with the susceptibility to develop neuroblastoma. LMO1 has been implicated as an oncogene in T-cell acute lymphoblastic leukemia; however, the transcriptional targets regulated by this protein in neuroblastoma cells are unknown. Here, we identify the genes and molecular pathways controlled by LMO1 in neuroblastoma cells. ChIP-seq analysis revealed that LMO1-bound regions are frequently co-occupied by GATA3 and MYCN proteins and are associated with active histone marks in neuroblastoma cells. RNA-seq analysis demonstrated that LMO1 regulates gene expression in a tumor type-specific manner. One high-confidence target gene directly regulated by LMO1 and MYCN is ASCL1, which is more highly expressed in adrenergic subtype of neuroblastoma cells as compared to normal neuronal cells. High levels of ASCL1 expression are associated with inferior overall survival in primary human neuroblastoma cases. ChIP-seq analysis identified a regulatory element controlling ASCL1 expression that is bound by LMO1, MYCN and the members of the core regulatory circuitry in neuroblastoma cells. Furthermore, ASCL1 is required for neuroblastoma cell growth and regulates genes responsible for repression of neuronal cell differentiation. Taken together, our results implicate ASCL1 as a critical downstream target of LMO1 in the molecular pathogenesis of neuroblastoma.

2019-11-09 | GSE120074 | GEO

RNA-seq of IMR-5/75 neuroblastoma cell line upon TBX2 and/or MYCN knockdown

Project description:RNA-seq upon TBX2, MYCN or combination of TBX2 and MYCN knockdown in the neuroblastoma cell line IMR-5/75. Cells were transduced with two different shRNAs (shTBX2_2 and shTBX2_4) targeting TBX2 and a non-targeting control (NTC), and selected with puromycin. Cells were treated with doxycycline for shMYCN induction (with DOX or not). Analysis was performed three days upon TBX2 knockdown and two days upon MYCN knockdown, including six biological replicates per condition.

2018-08-16 | E-MTAB-6568 | biostudies-arrayexpress

Genome-wide mapping of MYCN binding in neuroblastoma cells

Project description:To identify the MYCN transcription factor binding sites across the genome, we performed chromatin immunoprecipitation followed by sequencing (ChIP-seq) using anti-MYCN and anti-IgG antibodies on a MYCN-amplified NB cell line, SK-N-BE(2)-C. Identification of MYCN binding in neuroblastoma cells.

2016-05-16 | E-GEOD-72640 | biostudies-arrayexpress

FOXP1 inhibits cell growth and attenuates tumorigenicity of neuroblastoma

Project description:Single-color gene expression profiles from 3 neuroblastoma cell lines were generated using 44K oligonucleotide microarrays. To gain insights into the molecular processes occurring upon FOXP1 re-expression, we performed series of time-resolved gene expression measurements in FOXP1 and GFP transgenic neuroblastoma cell lines. Single-color gene expression profiles from 3 neuroblastoma cell lines were generated using 44K oligonucleotide microarrays. Total RNA of FOXP1- and GFP-expressing IMR-32, CHP-212 and SK-N-BE(2) cells was isolated at 0, 12, 24 and 72 h using Trizol. To determine global differences in the expression profiles of FOXP1- and GFP-induced IMR-32, CHP-212 and SK-N-BE(2) cells, mean expression levels of each gene between FOXP1-induced and control (GFP) cells were compared.

2014-10-17 | E-GEOD-62419 | biostudies-arrayexpress

Methylation map of 8 neuroblastoma cell lines: NGS after MBD2-capture

Project description:8 neuroblastoma (NB) cell lines (CLB-GA, IMR-32, SH-SY5Y, N206, CHP-902R, LAN-2, SK-N-AS, SJNB-1) their methylome is determined by sequencing after MBD2-capture using MethylCollector (ActiveMotif)

2012-09-13 | GSE31353 | GEO

Genome-wide profiling of SMARCA4 in neuroblastoma cells [ChIP-seq]

Project description:To reveal the genome-wide targets of SWI/SNF complexes in neuroblastoma cells, we performed ChIP-seq of SMARCA4 (BRG1) in IMR-32, KELLY, and SK-N-DZ cells. We used these libraries to examine chromatin occupancy profiling. Analysis of locations reveal that SMARCA4 targets directly regulate sites regulated by the neuroblastoma core regulatory circuitry.

2023-10-24 | GSE190707 | GEO

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