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High doses of Pyrethrins produce liver and thyroid gland tumours in rats by modes of action involving the induction of hepatic xenobiotic metabolising enzymes. The aim of this study was to compare the effects of Pyrethrins with those of the rat liver and thyroid tumour promoter sodium Phenobarbital on some cytochrome P450 (CYP) forms in cultured rat and human hepatocytes. The treatment of female Sprague–Dawley...
High doses of Pyrethrins produce liver tumors in female rats. To elucidate the mode of action for tumor formation, the hepatic effects of Pyrethrins have been investigated. Male Sprague-Dawley CD rats were fed diets containing 0 (control) and 8000 ppm Pyrethrins and female rats' diets containing 0, 100, 3000 and 8000 ppm Pyrethrins for periods of 7, 14 and 42 days and 42 days followed by 42 days of...
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