title: [Cytoprotective Effects of Phytoestrogen Genistein against Cancer Cells].
abstract: In this paper we study the effect of synthetic isoflavonoid genistein against cancer HeLa cells, which contain estrogen receptors alpha but not beta, with the aim to determine the cytotoxic or cytoprotective effect of genistein. It is shown that the half maximal inhibitory concentration (IC50) value of genistein (0.2 mM) for the growth inhibition of HeLa cells is at least ten times higher than that one of tamoxifen and cisplatin--drugs, used in cervical cancer treatment. In micromolar concentrations (0.1-10 μM) genistein decreased the cytotoxic effects of cisplatin and tamoxifen. The decreased Bax mRNA expression and increased Bcl-2 mRNA expression after incubation .of the cells with genistein also demonstrate the cytoprotective, anti-apoptotic effect of genistein. Genistein, even in high concentrations, had no effect on membrane potential and calcium capacity of isolated mitochondria, without activating the opening of Ca(2+)-induced mitochondrial pore. Thus, these data demonstrate a cytoprotective effect of isoflavonoid genistein against this type of cancer cells.
authors: T A
authors: TA
authors: Fedotcheva
authors: K E
authors: KE
authors: Shirokih
authors: A I
authors: AI
authors: Matyushin
authors: V M
authors: VM
authors: Rzheznikov
authors: V Y
authors: VY
authors: Kovtun
authors: N L
authors: NL
authors: Shimanovskii
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D047628:Estrogen Receptor alpha / Q000096:biosynthesis; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D019833:Genistein / Q000008:administration & dosage*; D006367:HeLa Cells; D006801:Humans; D008564:Membrane Potentials / Q000187:drug effects; D009363:Neoplasm Proteins / Q000096:biosynthesis*; D048789:Phytoestrogens / Q000008:administration & dosage*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000096:biosynthesis; D012333:RNA, Messenger / Q000096:biosynthesis
chemical_list: D047628:Estrogen Receptor alpha; D009363:Neoplasm Proteins; D048789:Phytoestrogens; D019253:Proto-Oncogene Proteins c-bcl-2; D012333:RNA, Messenger; D019833:Genistein