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zearalenone/cancer du sein
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Combined low-dose zearalenone and aflatoxin B1 on cell growth and cell-cycle progression in breast cancer MCF-7 cells.
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Zearalenone (ZEA) has long been recognized as a xenoestrogen, while the endocrine disrupting effects of aflatoxin B1 (AFB1) have been identified recently. Due to co-occurrence and endocrine disrupting potentials of ZEA and AFB1, it was hypothesized that co-exposure to ZEA and AFB1 might affect
Deciphering the Molecular Mechanisms Sustaining the Estrogenic Activity of the Two Major Dietary Compounds Zearalenone and Apigenin in ER-Positive Breast Cancer Cell Lines.
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The flavone apigenin and the mycotoxin zearalenone are two major compounds found in the human diet which bind estrogen receptors (ERs), and therefore influence ER activity. However, the underlying mechanisms are not well known. To unravel the molecular mechanisms that could explain the differential
Zearalenone and its metabolites in urine and breast cancer risk: a case-control study in Tunisia.
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Zearalenone (ZON) is a non-steroidal estrogenic mycotoxin produced by Fusarium species. The exposure risk to humans and animals is the consumption of contaminated food and animal feeds. It has been reported that ZON and some of its metabolites promote the development of hormone-dependent tumors. The
Removal of Cdk inhibitors through both sequestration and downregulation in zearalenone-treated MCF-7 breast cancer cells.
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Treatment of MCF 7 cells with the fungal estrogen zearalenone induced cyclin E-associated kinase activity transiently within 9-12 h; total cyclin-dependent kinase (Cdk) 2 activity was elevated for 24 h and beyond. This increased cyclin E/Cdk2 activity was associated with sequestration of the Cdk
Validation of two in vitro test systems for estrogenic activities with zearalenone, phytoestrogens and cereal extracts.
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In order to establish alternatives to the frequently used uterotropic assay with mice, defined estrogen-sensitive cell lines (MCF-7 cells and LeC-9 cells) were used to determine the estrogenic activities of purified compounds of vegetable origin (myco- and phytoestrogens) and
Effects of zearalenone on mRNA expression and activity of cytochrome P450 1A1 and 1B1 in MCF-7 cells.
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2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a ubiquitous pollutant and promoter of carcinogenesis with both estrogenic and antiestrogenic effects in mammal epithelium. Zearalenone (ZEA) is a naturally occurring estrogenic contaminant of moldy feeds and is present in high concentrations in dairy
Prepubertal exposure to zearalenone or genistein reduces mammary tumorigenesis.
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Prepubertal exposure to a pharmacological dose (500 mg kg(-1)) of the phyto-oestrogen genistein can reduce the incidence and multiplicity of carcinogen-induced mammary tumours in rats. However, such an exposure also disrupts the function of the hypothalamic-pituitary-gonadal axis, making it
Identification and characterization of a phytoestrogen-specific gene from the MCF-7 human breast cancer cell.
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Phytoestrogens are a group of compounds present in human diet that display estrogenic-like properties. Several studies have demonstrated that populations who consume large quantities of phytoestrogens have a reduced risk of estrogen-dependent cancers. Although it has been shown that certain
Anti-apoptotic action of zearalenone in MCF-7 cells.
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Zearalenone (ZEA), a nonsteroidal estrogenic mycotoxin, is present in high concentrations in dairy products and cereals. Studies have indicated that ZEA could strongly provoke proliferation in estrogen-dependent breast cancer MCF-7 cells following estrogen ablation. The current study confirmed the
Expression profiling of the genes responding to zearalenone and its analogues using estrogen-responsive genes.
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To compare gene expression profiles in response to estrogen or 17beta-estradiol (E(2)) and a mycotoxin, zearalenone (ZEA), and its analogues (collectively termed ZEA compounds), breast cancer MCF-7 cells were treated with 10 nM of E(2) or ZEA compounds including ZEA, alpha-zearalenol,
[Effects of zearalenone on proliferation and apoptosis in MCF-7 cells].
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OBJECTIVE
To explore the effects of zearalenone (ZEA) on proliferation and apoptosis in estrogen-dependent human breast cancer MCF-7 cells and the likely underlying molecular mechanisms.
METHODS
Cell viability was determined by MTT assay and cell cycle distribution by cytometry. Apoptosis was
Effects of zearalenone and alpha-Zearalenol in comparison with Raloxifene on T47D cells.
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Zearalenone (Zen) is a mycotoxin with estrogenic effect which contaminates cereals. In cell culture, Zen and its metabolite, alpha-Zearalenol (alpha-Zel), stimulate breast cancer cells growth. Today hormone-dependent cancers are important because of high incidence and death rate. Previous studies
Effects of α-zearalenol on the metabolome of two breast cancer cell lines by 1H-NMR approach.
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Placental BCRP/ABCG2 Transporter Prevents Fetal Exposure to the Estrogenic Mycotoxin Zearalenone.
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In the placenta, the breast cancer resistance protein (BCRP)/ABCG2 efflux transporter limits the maternal-to-fetal transfer of drugs and chemicals. Previous research has pointed to the estrogenic mycotoxin zearalenone as a potential substrate for BCRP. Here, we sought to assess the role of the BCRP
Evaluation of reduced toxicity of zearalenone by extrusion processing as measured by the MTT cell proliferation assay.
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The objective of this study was to determine loss of toxicity of zearalenone in extruded cereal-based products by the MTT (tetrazolium salt) cell proliferation assay using a sensitive MCF-7 human breast cancer cell line and to compare the results to chemical (high-performance liquid chromatography,
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