Metabolism of illudin S, a toxic substance ofLampteromyces japonicus: urinary excretion of mercapturic acids in rat

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Abstract
1. The urinary excretion of the mercapturic acids of illudin S after oral administration to rat has been studied. 2. From lc-ms/ms analysis of methanolic extracts of lyophilized rat urine, stereo-isomeric mercapturic acids were detected. 3. The mercapturic acids excreted 3 days following administration amounted to approximately 0.39-0.73% of the administered dose. 4. In vitro glutathione conjugation of illudin S by subcellular fractions was also examined. 5. No significant increases in the formation of glutathione adducts were observed in any subcellular fractions examined.