Effective chemopreventive activity of genistein against human breast cancer cells
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Updated: Aug 6, 2026

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Published on: September 18, 2013
Yun-Hee Shon1, Sun-Dong Park, Kyung-Soo Nam
1Department of Pharmacology, College of Medicine, Dongguk University, Gyeongju 780-714, Republic of Korea.
Abstract:
Chemopreventive and cytotoxic effect of genistein against human breast cancer cell lines was investigated. Genistein inhibited cell proliferation in estrogen receptor-positive (MCF-7) and estrogen receptor-negative (MDA-MB-231) human breast carcinoma cell lines. Cytochrome P450 (CYP) 1A1-mediated ethoxyresorufin O-deethylase (EROD)activity was inhibited by genistein in a concentration-dependent manner. Genistein significantly inhibited 12-Otetradecanoylphorbol-13-acetate (TPA)-induced cyclooxygenase-2 activity and protein expression at the concentrations of 10 (p < 0.05), 25 (p < 0.05) and 50 mM (p < 0.01). In addition, ornithine decarboxylase (ODC) activity was reduced to 53.8 % of the control after 6 h treatment with 50 mM genistein in MCF-7 breast cancer cells. These results suggest that genistein could be of therapeutic value in preventing human breast cancer.
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