Biochemistry international 1988-May
Toxicity of polycyclic aromatic hydrocarbons. VI. Effects of 1-nitropyrene on serum enzyme levels in rats, and protection against it by beta-naphthoflavone and dimethyl sulfoxide.
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Male Sprague-Dawley rats were pretreated i.p. with corn oil or DMSO (1.5 ml/kg/day), or with beta-naphthoflavone (BNF, 40 mg/kg/day) in corn oil or DMSO for 3 days. 1-Nitropyrene (1-NP, 150 mg/kg) in DMSO was injected i.p. 24 hr after pretreatment. A significant increase in the levels of several serum enzymes was seen in rats pretreated with corn oil alone 24 hr after 1-NP injection. The increase in enzyme activities was significantly reduced by a 3-day pretreatment with DMSO or BNF.