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  • 1
    Electronic Resource
    Electronic Resource
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 70 (1998), S. 323-329 
    ISSN: 0730-2312
    Keywords: steroids ; DNA replication ; carcinogenesis ; proliferation ; cell-free system ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: There is now convincing evidence associating estrogens with an increased risk of some cancers. However, the absence of a complete correlation between estrogen receptor binding and the biological activity of these estrogens has suggested the possibility of other mechanisms of action. The effect on DNA replication of several hormones that are putatively involved in breast cancer was tested at a physiological concentration. The studies were conducted in a HeLa cell-free system by using a plasmid containing a specific mammalian origin of replication (DHFR oriβ〈0R) as template DNA. A series of related steroids produced an entire range of activity from enhancement to inhibition of in vitro DNA replication. These studies indicate a new possible target, which may help to better understand the effect of these hormones in breast cancer. Furthermore, the results show that this in vitro DNA replication system provides an evaluative assay for the effects of compounds on hormone-responsive cancers independent of some hormone receptors. J. Cell. Biochem. 70:323-329, 1998. © 1998 Wiley-Liss, Inc.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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