title: Disruption of the female reproductive system by the phytoestrogen genistein.
abstract: Studies in our laboratory have shown that developmental exposure to genistein causes deleterious effects on the reproductive system. Oral exposure to genistin (25mg/kg) increases uterine weight at 5 days of age similar to subcutaneous injection of genistein (20mg/kg) suggesting that subcutaneous injection of genistein is a suitable model for oral exposure to genistin. Mice treated neonatally by subcutaneous injection of genistein (0.5-50mg/kg) exhibit altered ovarian differentiation leading to multi-oocyte follicles (MOFs). Ovarian function and estrous cyclicity were disrupted in genistein treated mice with increasing severity over time. Reduced fertility was observed in mice treated with genistein (0.5, 5, or 25mg/kg) and infertility was observed at 50mg/kg. Females generated from genistein 25mg/kg females bred to control males have increased MOFs suggesting these effects can be transmitted to subsequent generations. Thus, neonatal treatment with genistein at environmentally relevant doses caused adverse consequences on reproduction in adulthood.
authors.affiliation: Developmental Endocrinology and Endocrine Disruptor Section, Laboratory of Molecular Toxicology, National Institute of Environmental Health Sciences, NIH, DHHS, PO Box 12233, Research Triangle Park, NC 27709, United States. jeffers1@niehs.nih.gov
authors.forename: Wendy N
authors.initials: WN
authors.lastname: Jefferson
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Padilla-Banks
authors.forename: Retha R
authors.initials: RR
authors.lastname: Newbold
mesh_terms: D000818:Animals; D004791:Enzyme Inhibitors / Q000008:administration & dosage / Q000737:chemistry; D005260:Female; D019833:Genistein / Q000008:administration & dosage* / Q000737:chemistry; D005836:Genitalia, Female / Q000187:drug effects* / Q000503:physiopathology; D006801:Humans; D015394:Molecular Structure; D048789:Phytoestrogens / Q000008:administration & dosage* / Q000737:chemistry; D012098:Reproduction / Q000187:drug effects*; D013267:Stilbenes / Q000008:administration & dosage
chemical_list: D004791:Enzyme Inhibitors; D048789:Phytoestrogens; D013267:Stilbenes; C100172:dimethylstilbestrol; D019833:Genistein