Toxicity and carcinogenicity of ozone in combination with 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone and dibutyl phthalate in B6C3F1 mice for 16 and 32 weeks

Enzymological evaluation of hepatotropic effect of ozone in a subchronic experiment

Hepatotoxicity of ozone in total systems treatment was evaluated by the functioning of hepatic oxidoreductases. Activities of lactate dehydrogenase and alcohol dehydrogenase were measured in liver homogenates of Wistar rats, injected daily with saline with saturating ozone concentrations of 3000, 10,000, and 40,000 μg/liter or placebo for 30 days. Systemic ozone treatment had a two-step effect on the hepatic oxidoreductases. Low doses (0.6 μg) promoted a moderate physiological stimulation of the enzymes, while in doses >2 μg ozone led to progressive tissue hypoxia and accumulation of toxic products in the liver.