摘要:Sulfur-containing metabolites, 2, 4-dichlorophenyl methyl sulfoxide, 2, 4-dichlorophenyl methyl sulfone (2, 4-DCPSO2CH3), 3, 5-dichlorophenyl methyl sulfoxide and 3, 5-dichlorophenyl methyl sulfone (3, 5-DCPSO2CH3) were all found in the urine of both male and female mice given orally a 200 mg/kg dose of m-dichlorobenzene (m-DCB). m-DCB (200 mg/kg) given to mice of both sexes by either oral or intraperitoneal (i.p.) route increased the activities of aminopyrine N-demethylase (AD) and aniline hydroxylase, and the content of cytochrome P-450 in the liver microsomes. 3, 5-DCPSO2CH3 (100μmol/kg, i.p.) induced markedly the enzyme system in mice of both sexes. On the other hand, 2, 4-DCPSO2CH3 (100 μmol/kg, i.p.) decreased significantly the AD activity in the males and the cytochrome b5 content in the females. An i.p. administration of m-DCB, 2, 4-DCPSO2CH3 or 3, 5-DCPSO2CH3 also caused a marked increase in epoxide hydrolase activity in the livers of the male and female mice, except that 2, 4-DCPSO2CH3 had no effect on the enzyme activity in the females. Thus, the differences in the effects of 2, 4- and 3, 5-DCPSO2CH3 on the enzyme system were demonstrated and the sex differences in the effects of the sulfones were also found in mice.