title: Fate of ochratoxin A in goats.
abstract: The fate of ochratoxin A (OA) was studied in goats given a single oral dose of 3H-OA (0.5 mg/kg). More than 90% of the radioactivity was found to be excreted in 7 days and the majority (53%) was found in feces. Thirty-eight percent, 6% and 2.26% of the activity was found in urine, milk and serum, respectively. The radioactivity in the liver and kidney 6 hours after feeding amounted to 1.5 and 0.5% of the total dose administered, respectively. Subsequent fractionation of liver and kidney homogenates revealed that microsomes, ribosomes and post-ribosomal supernatant fractions contained most radioactivity. Thin layer chromatographic analyses revealed two additional radioactive spots with Rf values and fluorescent characteristics different from OA, Oalpha and 4-OH-OA. Whereas OA was found as the unaltered molecule in feces, the metabolites were primarily found in urine and milk. Less than 0.03% of free OA was found in milk during the 7-day period.
mesh_terms: D000818:Animals; D001711:Biotransformation; D005243:Feces / Q000032:analysis; D005260:Female; D006041:Goats; D007668:Kidney / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008892:Milk / Q000032:analysis; D009793:Ochratoxins / Q000378:metabolism*; D013347:Subcellular Fractions / Q000378:metabolism; D013997:Time Factors; D014018:Tissue Distribution
chemical_list: D009793:Ochratoxins