Chemosphere p. 1885 - 1893 (1998)
Update date:2022-08-17
Topics:
Huwe
Feil
Larsen
Wiener
Metabolism studies of 1,4,7,8-tetrachlorodibenzo-p-dioxin (TCDD), a relatively nontoxic dioxin congener, were undertaken to gain a better understanding of mammalian metabolism of dioxins without the problems associated with the use of the most toxic congener, 2,3,7,8-TCDD. 14C- 1,4,7,8-TCDD was dosed to conventional and bile-cannulated rats at a level of 8 mg/kg. The 14C was excreted almost entirely in 72 hours with the major routes of excretion feces and bile. Metabolites were identified from the feces, bile, and urine by GC-MS or negative ion FAB MS and 1H NMR. The two major fetal metabolites were hydroxylated tetra- and triCDDs. Glucuronide and sulfate conjugates of these hydroxyl metabolites were found in the urine and bile. Minor metabolites included dichlorocatechol, dihydroxylated tetra- and triCDDs, and conjugates of these compounds.
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