title: Antitumor and antiangiogenic activity of soy phytoestrogen on 7,12-dimethylbenz[alpha]anthracene-induced mammary tumors following ovariectomy in Sprague-Dawley rats.
abstract: Soy phytoestrogen is often used as hormone replacement therapy to alleviate the symptoms of menopause in postmenopausal women. Since estrogen has been considered as an important risk factor for the development of breast carcinoma, we need to know whether it is safe for these postmenopausal women with breast cancer to take soy foods that are rich in phytoestrogen. In the present study, we investigated the efficacy of soy phytoestrogen on tumor proliferation, apoptosis, and angiogenesis in mammary tumors that had already formed in ovariectomized rats. We found that soy phytochemical extraction inhibited proliferation and induced apoptosis in vitro and in vivo, and it demonstrated better antitumor effects than single phytoestrogen. Soy phytochemical extraction also produced surprisingly good antiangiogenic effects, which were evidenced by lower microvascular density, reduced plasma vascular endothelial growth factor, and increased plasma endostatin levels. Our findings suggest that soy phytochemical extraction exerts significant antitumor and antiangiogenic activity in a postmenopausal animal model with breast cancer.
authors.affiliation: Dept of Medical Oncology, Tumor Hospital of Harbin Medical Univ, Harbin 150040, China.
authors.forename: Xinmei
authors.initials: X
authors.lastname: Kang
authors.forename: Shi
authors.initials: S
authors.lastname: Jin
authors.forename: Qingyuan
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D043925:Angiogenesis Inducing Agents / Q000097:blood; D020533:Angiogenesis Inhibitors / Q000097:blood / Q000627:therapeutic use*; D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology / Q000627:therapeutic use*; D017209:Apoptosis / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D042783:Endothelial Cells / Q000187:drug effects; D005260:Female; D019833:Genistein / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D007529:Isoflavones / Q000494:pharmacology / Q000627:therapeutic use*; D008325:Mammary Neoplasms, Experimental / Q000097:blood / Q000098:blood supply / Q000139:chemically induced / Q000188:drug therapy*; D055806:Microvessels / Q000187:drug effects; D048789:Phytoestrogens / Q000494:pharmacology / Q000627:therapeutic use*; D008517:Phytotherapy; D010936:Plant Extracts / Q000494:pharmacology / Q000627:therapeutic use*; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D013025:Glycine max / Q000737:chemistry; D047368:Tumor Burden / Q000187:drug effects
chemical_list: D043925:Angiogenesis Inducing Agents; D020533:Angiogenesis Inhibitors; D000970:Antineoplastic Agents; D007529:Isoflavones; D048789:Phytoestrogens; D010936:Plant Extracts; C004742:daidzein; D019833:Genistein