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Genomic binding profiles of ERa in MCF-7 and T47D control or enhancer588-targeted cells

ABSTRACT: Estrogen Receptor a (ERa) bindning to DNA was profiled by ChIP-seq in MCF-7 and T47D cells transduced with either control sgRNA, or sgRNA targeting a specific enhancer region (enhancer588).

ORGANISM(S): Homo sapiens

PROVIDER: GSE75779 | GEO | 2015/12/14

SECONDARY ACCESSION(S): PRJNA305318

REPOSITORIES: GEO

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Genomic binding profiles of ERa in MCF-7 and T47D control or enhancer588-targeted cells

Project description:Estrogen Receptor a (ERa) bindning to DNA was profiled by ChIP-seq in MCF-7 and T47D cells transduced with either control sgRNA, or sgRNA targeting a specific enhancer region (enhancer588). ERa in MCF-7 and T47D control or enhancer588-targeted cells

2015-12-14 | E-GEOD-75779 | biostudies-arrayexpress

Analysis of genome-wide occupancy of menin in T47D and MCF-10A cells

Project description:We performed ChIP-seq using antibodies directed at menin in T47D and MCF-10A cells in order to assess the genome-wide presence of menin in these cells.

2017-03-10 | GSE94009 | GEO

Estrogen-responsive Estrogen Receptor alpha binding sites in MCF-7 by ChIP-seq

Project description:Identification of Estrogen Receptor alpha (ERa) binding sites by ChIP-seq in MCF-7 breast cancer cells following an estrogen treatment. This study describes molecular effects of estradiol treatment and subsequent regulation by ER for a single gene/locus. A public ER chipseq (available in SRA as ERR011973), in addition to our own data, guided us to regulatory regions were ER was binding that were then analyzed in detail using "manual" ChIP. MCF-7 cells were treated for 1 h either 10 nm estradiol (E2) or vehicle (ethanol) and subjected to ChIP using antibodies against ERa or IgG.

2012-12-17 | E-GEOD-34759 | biostudies-arrayexpress

Transcription profiling of mouse ERa abalated differentiated osteoclasts

Project description:Estrogen clearly prevents osteoporotic bone loss by attenuating bone resorption. The molecular basis of how this is accomplished, however, remains elusive. Here we report a critical role of osteoclastic ERa in mediating estrogen action on bone in females. We selectively ablated ERa in differentiated osteoclasts (ERa dOc/dOc). ERa dOc/dOc females, but not males, exhibited clear trabecular bone loss, similar to the osteoporotic bone phenotype in post-menopausal women. Recovery of bone loss by estrogen treatment of the ovariectomized ERa dOc/dOc females was ineffective in the trabecular areas of the long bones and lumbar vertebral bodies. Osteoclastic apoptosis, induced by estrogen, occurred simultaneously with up-regulation of Fas ligand (FasL) expression in intact trabecular bones of ERa +/+mice, but not in ERa dOc/dOc mice. ERa was also required for similar effects of estrogen and tamoxifen in cultured osteoclasts. These findings suggest that the osteoprotective actions of estrogen and SERMS are mediated at least in part through osteoclastic ERa in trabecular bone; and the life span of mature osteoclasts is regulated through activation of the Fas/FasL system. Experiment Overall Design: Wild type and osteoclast-specific Estrogen Receptor alpha knock-out mice were ovariectomized. The number of both genotypes of mice was eight. The mice of each genotypes were divided to vehicle control and estrogen treated group. Four hours after chemical treatment, the distal 5 mm of the left femurs were harvested after sacrificing by cervical dislocation and total RNAs were purified for Affymetix GeneChip microarray analysis without pooling. Therefore, this experiment consists of four groups with four replicates per group.

2008-06-15 | E-GEOD-7798 | biostudies-arrayexpress

Estrogen effects on MCF-7 breast cancer cells co-expressing ERa and ERb

Project description:Two subtypes of the estrogen receptor, ERalpha and ERbeta, mediate the actions of estrogens, and the majority of human breast tumors contain both ERalpha and ERbeta. To examine the possible interactions and modulatory effects of ERbeta on ERalpha activity, we have used adenoviral gene delivery to produce human breast cancer (MCF-7) cells expressing ERbeta, along with their endogenous ERalpha. We have examined the effects of ERβ expression on genome-wide gene expression by Affymetrix GeneChip microarrays. We find that ERbeta modulated estrogen gene expression on nearly 24% of E2-stimulated genes but only 8% of E2-inhibited genes. We find that ERbeta modulation is gene-specific, enhancing or counteracting ERalpha regulation for distinct subsets of estrogen target genes. Introduction of ERbeta into ERalpha-containing cells induced up/down-regulation of many estrogen target in the absence of any added ligand. In addition, ERbeta presence elicited the expression of a unique set of genes that were not regulated by ERalpha alone. ERbeta modulated the expression of genes in many functional categories, but the greatest numbers were associated with transcription factor and signal transduction pathways. Regulation of multiple components in the TGF beta, SDF1, and semaphorin pathways, may contribute to the suppression of proliferation observed with ERbeta both in the presence and absence of estrogen. Hence, ERbeta modulates ERalpha gene regulation in diverse ways that may contribute to its growth-inhibiting beneficial effects in breast cancer Keywords: modulatory effects of ERb on ERa

2006-08-10 | GSE4006 | GEO

Transcriptome changes in MCF-7 and T47D breast cancer cells after four day incubation in glucose deprived medium and beta-hydroxybutyrate

Project description:We investigated gene expression changes of glucose deprived MCF-7 and T47D breast cancer cells supplemented with either 10 mM or 25 mM BHB. Glucose deprivation revealed numerous differentially expressed genes indicating an involvement of the Hippo pathway in MCF-7 cells and the NRF2-Ferroptosis axis in T47D cells. Beta-hydroxybutyrate had limited impact on breast cancer cells and differentially expressed genes were not associated with any pathways following pathway enrichment analysis.

2020-07-07 | GSE153830 | GEO

Transcription profiling of human ER+ BrC cells with and without estradiol in both cell cultures and xenografts

Project description:We generated DNA microarray based gene expression profiles from three estrogen receptor a (ERa) positive breast cancer cell lines stimulated by 17Ã?-estradiol (E2) in vitro over a time course, as well as from MCF-7 cells grown as xenografts in ovariectomized athymic nude mice with E2 supplementation and after its withdrawal. Experiment Overall Design: 8 MCF-7 xenograft profiles (4 with E2,4 without E2), 14 T47D profiles (with E2 treatment in culture from 0 to 24 hr), 10 BT-474 profiles (with E2 treatment from 0 to 24 hr), 12 MCf-7 profiles (with E2 treatment from 0 to 24 hr)

2008-06-12 | E-GEOD-3834 | biostudies-arrayexpress

RNA sequencing from T47D and MCF-7 breast cancer cells

Project description:RNA sequencing from T47D and MCF-7 breast cancer cells

| PRJNA608867 | ENA

Estrogen-responsive Estrogen Receptor alpha binding sites in MCF-7 by ChIP-seq

2012-12-17 | GSE34759 | GEO

Expression data of hormone-responsive MCF-7 cells versus estrogen-deprived MCF-7:5C and MCF-7:2A breast cancer cells

Project description:Estrogen deprivation using aromatase inhibitors is currently the standard of care for patients with estrogen-receptor (ER)-positive breast cancer. Unfortunately, prolonged estrogen deprivation leads to drug resistance (i.e. hormone-independent growth). We therefore used DNA microarray analysis to study the gene expression profiles of wild-type MCF-7 cells (which are sensitive to antihormone therapy) and long-term estrogen deprived MCF-7:5C and MCF-7:2A breast cancer cells (which are resistance to estrogen-deprivation; aromatase inhibitor resistant). Transcriptional profiling of wild-type MCF-7 cells and estrogen deprived MCF-7:5C and MCF-7:2A cells was performed using Affymetrix Human Genome U133 Plus 2.0 Array. Keywords: breast cancer cells, estrogen

2008-03-19 | GSE10879 | GEO

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