Interactions of chlorinated hydrocarbon pesticides with the 8S estrogen-binding protein in rat testes.
The effect of certain DDT analogs on the binding of 3H-estradiol to the 8--9S estrogen binding protein of rat testicular cytosol was studied by sucrose sedimentation analysis. The binding of 3H-estradiol to testicular cytosol was inhibited by o,p'DDT, a DDT analog which is estrogenic in the intact female, but not by p,p'DDE which is a nonestrogen in the female. The pesticide methoxychlor, which is estrogenic in vivo in the female, failed to inhibit 3H-estradiol binding, presumably requiring metabolic activation for binding to the testicular cytosol. In fact, its di-demethylated metabolite 2,2-bis(p-hydroxyphenyl)-1,1,1-trichloroethane (HPTE), also estrogenic in vivo, caused marked suppression of 3H-estradiol binding.
D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D003600:Cytosol / Q000187:drug effects / Q000378:metabolism; D003634:DDT / Q000031:analogs & derivatives / Q000494:pharmacology; D004958:Estradiol / Q000378:metabolism; D004967:Estrogens / Q000378:metabolism*; D066298:In Vitro Techniques; D007306:Insecticides / Q000494:pharmacology*; D008297:Male; D051381:Rats; D011960:Receptors, Estrogen / Q000187:drug effects / Q000378:metabolism; D013737:Testis / Q000187:drug effects / Q000378:metabolism*
D002352:Carrier Proteins; D004967:Estrogens; D007306:Insecticides; D011960:Receptors, Estrogen; D004958:Estradiol; D003634:DDT