title: Estrogenic properties of 3,9-dihydroxy-7,12-dimethylbenz[a]anthracene in rats.
abstract: Previously, the 3,9-dihydroxy derivative of benz[a]-anthracene was shown to be weakly estrogenic. The availability of the related diol of the mammary carcinogen dimethylbenz[a]-anthracene, i.e., 3,9-dihydroxy-7,12-dimethylbenz[a]anthracene (3,9-diOHDMBA), prompted a similar study of its estrogenic properties. The competitive binding studies of 3,9-diOHDMBA with 17beta-estradiol in the uterine cytosol of immature SD rats gave a Ka of 1.7 x 10(8) M-1. 17beta-Estradiol (10(-9) M) binding to the 8S binding protein was inhibited by 3,9-diOHDMBA at concentrations similar to those of nafoxidine HCl (1 x 10(-5) M). Bioassay demonstrated that the diol possesses 1/4,464 the activity of 17beta-estradiol.
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000031:analogs & derivatives / Q000378:metabolism / Q000494:pharmacology; D000818:Animals; D001551:Benz(a)Anthracenes / Q000031:analogs & derivatives; D001667:Binding, Competitive; D003600:Cytosol / Q000378:metabolism; D004958:Estradiol / Q000378:metabolism; D004967:Estrogens; D005260:Female; D066298:In Vitro Techniques; D051381:Rats; D011960:Receptors, Estrogen / Q000378:metabolism*; D014599:Uterus / Q000378:metabolism
chemical_list: D001551:Benz(a)Anthracenes; D004967:Estrogens; D011960:Receptors, Estrogen; D004958:Estradiol; D015127:9,10-Dimethyl-1,2-benzanthracene