Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Identification of the ER-beta cistrome in ER-beta expressing MDA-MB-231 cells [ChIP-seq]

ABSTRACT: We have utilized ChIPseq to identify the ER-beta cistrome in ER-beta expressing MDA-MB-231 triple negative breast cancer cells. ER-beta has been identified as a tumor suppressor in breast cancer and recent reports have demonstrated that ER-beta protein is detectable at moderate to high levels in approximately 30% of triple negative breast tumors. Increased expression of ER-beta in triple negative breast cancer has also been reported to be associated with improved recurrence-free survival. Treatment of ER-beta expressing triple negative breast cancer cells with estrogen, or the ER-beta selective agonist, LY500307, results in decreased cell proliferation, invasion and migration. To begin to identify the molecular mechanisms by which ER-beta elicits tumor suppressive effects in triple negative breast cancer, we performed ChIPseq studies and identified the genome-wide binding sites for ER-beta following exposure to 1nM estrogen or 10nM LY500307 for 3 hours. Over 28,000 and 10,000 unique ER-beta binding sites were identifed in response to these two ligands respectively. The top transcription factor motifs identified under both treatment conditions were estrogen response elements and AP1 response elements. The majority of ER-beta binding sites were found at enhancer regions located within introns or intergenic chromatin regions followed by gene promoters.

ORGANISM(S): Homo sapiens

PROVIDER: GSE108979 | GEO | 2018/08/23

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Characterization of the AR cistrome in ER-negative breast cancer cell lines

Project description:Although molecular apocrine and some triple negative breast cancer tumours express high levels of AR, how AR signalling impacts their proliferative rate remains an area of controversy. The precise molecular mechanisms by which the AR can induce divergent proliferative effects in estrogen receptor-negative breast cancers has not been described. The potent androgen, DHT, inhibits proliferation of the MFM-223 estrogen receptor-negative breast cancer cell line. In contrast, activation of the AR by DHT either stimulates, or has no effect, on MDA-MB-453 cell proliferation. The AR cistrome was examined in order to identify candidate factors which mediate oncogenic versus tumour suppressive AR activity in ER-negative breast cancer.

2024-10-28 | GSE186873 | GEO

Starfysh reveals heterogeneous spatial dynamics in the breast tumor microenvironment

Project description:Integrative analysis of primary estrogen receptor-positive (ER+) breast cancer, triple-negative breast cancer (TNBC), and metaplastic breast cancer (MBC) tumors using Starfysh.

2024-02-10 | GSE218951 | GEO

Phosphatome profiling of estrogen receptor negative breast cancer

Project description:Purpose: To characterize the expression of phosphatases in estrogen receptor negative breast cancer Little is known about the role of phosphatases in the major estrogen receptor negative breast cancer phenotypes (i.e. those overexpressing ERBB2 and the triple negative). We carried out microarray phosphatome profiling in 41 estrogen receptor negative (ER-) breast cancer patients (as determined by immunohistochemistry (IHC)) containing both ERBB2+ and ERBB2- in order to characterize the differences between these groups by Statistical Analysis of Microarrays (SAM). Our findings point to the importance of the MAPK and PI3K pathways in ER- BCs as some of the most differentially expressed phosphatases (like DUSP4 and DUSP6) share ERK as substrate, or regulate the PI3K pathway (INPP4B, PTEN). These observations are also confirmed by pathway and GSEA analysis. It is shown that both ER- ERBB2+ and triple negative breast cancers have a distinctive pattern of phosphatase RNA expression. Surgical specimens from primary breast cancers that were estrogen receptor negative according to immunohistochemistry

2014-06-30 | E-GEOD-51999 | biostudies-arrayexpress

Isolation and characterization of a metastatic hybrid cell line generated by ER negative and ER positive breast cancer cells in mouse bone marrow

Project description:The origin and the contribution of breast tumor heterogeneity to its progression are not clear. We investigated the effect of a growing orthotopic tumor formed by an aggressive estrogen receptor (ER)-negative breast cancer cell line on the metastatic potential of a less aggressive ER-positive breast cancer cell line for the elucidation of how the presence of heterogeneous cancer cells might affect each other’s metastatic behavior. ER positive ZR-75-1/GFP/puro cells, resistant to puromycin and non-tumorigenic/non-metastatic without exogenous estrogen supplementation, were injected intracardiacally into mice bearing growing orthotopic tumors, formed by ER negative MDA-MB-231/GFP/Neo cells resistant to G418. A variant cell line B6, containing both estrogen-dependent and -independent cells, were isolated from GFP expressing cells in the bone marrow and re-inoculated in nude mice to generate an estrogen-independent cell line B6TC.

2011-05-25 | E-GEOD-27515 | biostudies-arrayexpress

Phosphatome profiling of estrogen receptor negative breast cancer

2014-06-30 | GSE51999 | GEO

Transcriptome analysis of ER+/PR+, ER-/PR+ and triple negative breast tumors

Project description:The goal of this study is to analyse whether ER-/PR+ breast tumors could be transcriptionally different from ER+/PR+ and/or from triple negative breast tumors

2021-01-26 | GSE162332 | GEO

Breast Cancer RNA-seq

Project description:RNA-seq was performed on breast cancer cell lines and primary tumors RNA-seq was performed on 28 breast cancer cell lines, 42 Triple Negative Breast Cancer (TNBC) primary tumors, and 42 Estrogen Receptor Positive (ER+) and HER2 Negative Breast Cancer primary tumors, 30 uninovlved breast tissue samples that were adjacent to ER+ primary tumors, 5 breast tissue samples from reduction mammoplasty procedures performed on patients with no known cancer, and 21 uninvolved breast tissue samples that were adjacent to TNBC primary tumors.

2014-06-11 | E-GEOD-58135 | biostudies-arrayexpress

An analysis of the Neoantigen burden in Breast Carcinoma Patients

Project description:In this study we report the neoantigen landscape, tumor mutational burden and tumor microenvironment of seven breast cancer patients, consisting of three Estrogen receptor (ER) positive and four Triple negative breast cancer (TNBC) subtypes.

2022-03-22 | GSE189191 | GEO

Breast cancer cells: ER status and fatty acid treatment

Project description:Estrogen receptor dependent genomic expression profiles in breast cancer cells in response to fatty acids. Estrogen receptor positive cells respond better to omega 3 treatments. two condition experiments: ER positive and negative breast cancer cells exposed to two fatty acids: omega-3 (eicosapentanoic acid) and 6 (arachidonic acid).

2010-05-22 | E-GEOD-14679 | biostudies-arrayexpress

Estrogen receptor β role in tumour suppression of triple negative breast cancer - ChIPseq experiment

Project description:Estrogen receptor β role in tumour suppression of triple negative breast cancer - ChIPseq experiment

| PRJEB33056 | ENA