کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2197817 1550986 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel molecular assay to discriminate transcriptional effects caused by xenoestrogens
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
A novel molecular assay to discriminate transcriptional effects caused by xenoestrogens
چکیده انگلیسی

A phenotypic definition of the term estrogen has become increasingly problematic due to the multiple modes of estrogen action which can now be defined by differing nuclear and membrane receptors for the classic ligand, 17β-estradiol, and by the multiple signalling pathways that are consequently addressed. This has led to the term xenoestrogen being largely determined by whatever assay system is used for its definition. Here we describe a novel and simple matrix for a transfection system using MBA-MD231 and MCF-7 breast cancer cells as hosts. This matrix is able to vary the type of nuclear estrogen receptor used, and by varying the promoter-reporter construct between one using a classic estrogen response element (ERE) enhancer, and one using an enhancer element derived from the bovine oxytocin gene promoter binding an orphan nuclear receptor, direct classical effects can be neatly discriminated from non-classical and non-genomic actions of test substances. This assay matrix has been used to examine a selection of phytoestrogens and xenobiotics, thereby providing new information on the mechanism of action of some of these substances in breast cancer cells.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular and Cellular Endocrinology - Volume 276, Issues 1–2, 30 September 2007, Pages 45–54
نویسندگان
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