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Chronic Bisphenol A and Genistein Exposure in MCF7 cells

ABSTRACT: Exposures to environmental endocrine disruptors is growing and human contact in industrialized countries has become signficant and constant. We studied the effect of chronic exposure to two endocrine disrupting compound, bisphenol A and genistein, in an in vitro cell culture system. MCF7 cells were cultured for greater than 70 passages under normal (MCF7-F) conditions or with the addition of 50 nM BPA (MCF7-B) or GEN (MCF7-G). We performed transcriptome analysis of the all three cell lines in the absence of any estrogenic compounds and in the presence of 10 nM estradiol for 3 hours.

ORGANISM(S): Homo sapiens

PROVIDER: GSE59345 | GEO | 2014/09/01

SECONDARY ACCESSION(S): PRJNA255108

REPOSITORIES: GEO

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Chronic Bisphenol A and Genistein Exposure in MCF7 cells

Project description:Exposures to environmental endocrine disruptors is growing and human contact in industrialized countries has become signficant and constant. We studied the effect of chronic exposure to two endocrine disrupting compound, bisphenol A and genistein, in an in vitro cell culture system. MCF7 cells were cultured for greater than 70 passages under normal (MCF7-F) conditions or with the addition of 50 nM BPA (MCF7-B) or GEN (MCF7-G). We performed transcriptome analysis of the all three cell lines in the absence of any estrogenic compounds and in the presence of 10 nM estradiol for 3 hours. The MCF7-F, B, G cell lines were starved of all estrogenic compounds by culturing the cells for 72 hours in phenol red free DMEM containing 5% charcoal/dextran treated FBS. Cells were then treated with either ethanol vehicle or 10 nM 17b-estradiol for 3 hours. Total RNA was harvested and utilized for whole genome analysis on the Affymetrix Human Trascriptome Array 2.0. The experiment was performed in duplicate

2014-09-01 | E-GEOD-59345 | biostudies-arrayexpress

DNA Methylation Targets Influenced by Bisphenol A and/or Genistein Are Associated with Survival Outcomes in Breast Cancer Patients

Project description:Early postnatal exposures to Bisphenol A (BPA) and genistein (GEN) have been reported to predispose for and against mammary cancer, respectively, in adult rats. Since the changes in cancer susceptibility occurs in the absence of the original chemical exposure, we have investigated the potential of epigenetics to account for these changes. DNA methylation studies reveal that prepubertal BPA exposure alters signaling pathways that contribute to carcinogenesis. Prepubertal exposure to GEN and to BPA + GEN suggests pathways involved in maintenance of cellular function, indicating that the presence of GEN either reduces or counters some of the alterations caused by the carcinogenic properties of BPA. We subsequently evaluated the potential of epigenetic changes in the rat mammary tissues to predict survival in breast cancer patients via The Cancer Genomic Atlas (TCGA). We identified 12 genes that showed strong predictive values for long-term survival in estrogen receptor positive patients. Importantly, two genes associated with improved long term survival, HPSE and RPS9, were identified to be hypomethylated in mammary glands of rats exposed prepuberally to GEN or to GEN + BPA respectively, reinforcing the suggested cancer suppressive properties of GEN.

2017-07-09 | GSE89107 | GEO

Genistein and bisphenol A exposure cause estrogen receptor 1 to bind thousands of binding sites in a cell type-specific manner

Project description:To obtain an integrated view of gene regulation in response to environmental and endogenous estrogens on a genome-wide scale, we performed ChIP-seq, to identify estrogen receptor 1 (ER) binding sites, and RNA-seq in endometrial cancer cells exposed to bisphenol A (BPA; found in plastics), genistein (GEN; found in soybean), or 17β-estradiol (E2; an endogenous estrogen). GEN and BPA treatment induces thousands of ER binding sites and >50 gene expression changes, representing a subset of E2‑induced gene regulation changes. Genes affected by E2 were highly enriched for ribosome-associated proteins; however, GEN and BPA failed to regulate most ribosome-associated proteins and instead enriched for transporters of carboxylic acids. Treatment-dependent changes in gene expression were associated with treatment-dependent ER binding sites, with the exception that many genes up-regulated by E2 harbored a BPA-induced ER binding site, but failed to show any expression change after BPA treatment. GEN and BPA exhibited a similar relationship to E2 in the breast cancer line T-47D, where cell type specificity played a much larger role than treatment specificity. Overall, both environmental estrogens clearly regulate gene expression through ER on a genome-wide scale, although with lower potency resulting in less ER binding sites and less gene expression changes compared to the endogenous estrogen, E2. RNA-seq of human cancer cell lines treated with estradiol, bisphenol A, genistein or DMSO (control)

2012-06-13 | E-GEOD-38234 | biostudies-arrayexpress

Expression data from in utero exposure to genistein, vinclozolin and the mixture of genistein and vinclozolin on the mammary gland

Project description:Morphogenesis of the mammary gland relies on the precise developmental control of morphological elements including TEBs, ducts and lobules. In the peripubertal mammary gland, rising levels of ovarian hormones control this development through a tightly controlled genetic program where specific sets of genes are up-regulated. We used microarrays to detail the program of gene expression underlying different classes of up-regulated genes during the peripubertal process after administration of endocrine disruptors during the fetal and neonatal development. Rat mammary glands were selected at two peripubertal periods (days 35 and 50), after administration of genistein and vinclozolin during the fetal and neonatal development, for RNA extraction and hybridization on Affymetrix microarrays.. We sought to obtain homogeneous populations of mammary gland for each treatment, and at each developmental stage, in order to increase the temporal and specific effect resolution of time course and endocrine disruption.

2012-03-01 | E-GEOD-32432 | biostudies-arrayexpress

Expression data from MCF7/BUS cell culture exposed to xenoestrogens

Project description:MCF7 cells were exposed to xenoestrogens (vehicle = 0.1% ethanol, 30 pM 17beta-estradiol, 3 micromolar genistein, 10 micromolar genistein, 1 micomolar daidzein, 10 nM bisphenol A, 10 nM para-nonylphenol, 3 nM PPT) for 48 hours. Keywords: xenoestrogen response

2006-07-01 | GSE5200 | GEO

Genistein and bisphenol A exposure cause estrogen receptor 1 to bind thousands of binding sites in a cell type-specific manner

2012-06-13 | GSE38234 | GEO

Neonatal Genistein Exposure Causes Implantation Failure by Disrupting Uterine Developmental Patterning and Endometrial Gland Formation

Project description:Female mice exposed neonatally to the phytoestrogen genistein (GEN) at doses similar to those in infants consuming soy-based infant formulas are infertile due in part to uterine implantation defects. To determine the mechanisms by which neonatal GEN exposure causes implantation defects, female mice were exposed to vehicle (corn oil) or GEN in corn oil (50 mg/kg/day) on postnatal days (PND) 1-5. Uterine tissues were collected during early gestation for microarray analysis; gestation day 1.5 (GD1.5), GD3.5, GD4.5 and GD5.5. We conclude that neonatal GEN exposure disrupts expression of genes important for uterine development, causing posteriorization and diminished gland function during pregnancy that together cause implantation failure.

2020-01-24 | GSE138500 | GEO

Transcriptome response to genistein in zebrafish embryos

2012-11-01 | GSE34616 | GEO

Prenatal exposure to bisphenol A, genistein and indole-3-carbinol on early mammary gland development and carcinogenesis in female Sprague-Dawley offspring

Project description:Rodent studies have indicated that gestational and perinatal bisphenol A (BPA) exposure increase the risk of developing breast cancer during adulthood. In contrast, some dietary compounds such as genistein (GEN) and indole 3-carbinol (I3C) present potential protective effects against inducing hormone-dependent cancers, including that of the mammary gland. Thus, we aimed to evaluate the role of these dietary compounds on early mammary gland development and carcinogenesis in female Sprague-Dawley offspring. Pregnant Sprague-Dawley (SD) rats were treated with BPA at 25 or 250µg/kg b.w./day by gavage from gestational day (GD) 10 to 21 with or without dietary GEN (250 mg/kg chow, ~5.5 mg/kg b.w./day) or I3C (2000 mg/kg chow, ~45.0 mg/kg b.w./day). At post-natal day (PND) 21, some female offspring from different litters were euthanized for mammary gland development and gene expression analyses while other female offspring received a single dose of N-methyl-N-nitrosourea (MNU) for mammary carcinogenesis initiation. The findings this study indicated the prenatal exposure to BPA, GEN and I3C did not significantly alter ductal elongation, number of terminal end buds (TEB) or cell proliferation, and estrogen receptor alpha (ER-α) immunostaining expression in epithelial mammary cells at PND 21. BPA treatment modulated the expression of several genes, but these changes were not associated with a dose dependent response. Dietary GEN and I3C treatment causally and consistent with the mammary gland structures outcomes. Besides, maternal BPA exposure associated with dietary GEN and I3C did not alter the susceptibility to the mammary cancer development in adulthood when the carcinogen was administered in a window of immature mammary gland development.

2016-06-03 | GSE68973 | GEO

Transcriptome response to genistein in zebrafish embryos

Project description:To test wether endocrine disruption is detectable in zebrafish at the transcriptome level, we exposed newly fertilized zebrafish embryos to low doses of genistein (EC10 and EC20) for 48 hours. Newly fertilized embryos (<2hpf) were exposed to 2.2 mg/l (EC10) and 2.4 mg/l (EC20) genistein for 48 hours. Since aceton was used as a solvent for genistein, an acetone solvent control in addition to the water (ISO) control was included in the study. Overall, four replicates were performed per condition, each consisting of 24 pooled embryos.

2012-11-01 | E-GEOD-34616 | biostudies-arrayexpress

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