title: Metabolic fates of diethylstilboestrol sulphates in the rat.
abstract: The metabolic fates and modes of excretion of diethylstilboestrol mono[35S]sulphate and diethylstilboestrol di[35S]sulphate were studied in the rat. Both of the esters were desulphated to some extent in vivo. In addition, significant amounts of radioactivity appeared in the bile as diethylstilboestrol mono[35S]sulphate monoglucuronide. The percentage of the dose appearing in bile as the diconjugate was substantially greater in experiments with diethylstilboestrol mono[35S]sulphate than with diethylstilboestrol di[35S]sulphate. Whole-body radioautography and studies with isolated perfused liver confirmed the liver as the major metabolic organ for both esters. When the metabolite diethylstilboestrol mono[35S]sulphate monoglucuronide isolated from the bile was reinjected, it was excreted in the bile unchanged. Studies in vitro demonstrated that both esters were substrates for arylsulphatase C with Km values in the range 52-76 micrometer. The metabolic fates and modes of excretion of the esters are discussed in relation to the enzyme complement of rat liver.
mesh_terms: D000818:Animals; D001646:Bile / Q000032:analysis; D004054:Diethylstilbestrol / Q000138:chemical synthesis / Q000378:metabolism* / Q000652:urine; D005260:Female; D005965:Glucuronates / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008297:Male; D051381:Rats; D013347:Subcellular Fractions / Q000378:metabolism
chemical_list: D005965:Glucuronates; D004054:Diethylstilbestrol