Abstract:
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(En)
Of the microsomal enzyme inducers and inhibitors tested in rats, the only one to modify the toxicity of tunicamycin or the closely-related corynetoxin, the causal agent of annual ryegrass toxicity, was phenobarbitone. It increased the LD50 of tunicamycin from 0.31 mg/kg to 0.77 mg/kg. Similar results were obtained with the related corynetoxin. Tunicamycin was also shown to be an inhibitor of cytochromes P-450. Rats sacrificed 48 h after receiving an LD50 dose of tunicamycin had cytochroms P-450 levels
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