GENDER-RELATED DIFFERENCES IN SUSCEPTIBILITY TO ACETAMINOPHEN-INDUCED PROTEIN ARYLATION AND NEPHROTOXICITY IN THE CD-1 MOUSE

被引:45
作者
HOIVIK, DJ
MANAUTOU, JE
TVEIT, A
HART, SGE
KHAIRALLAH, EA
COHEN, SD
机构
[1] UNIV CONNECTICUT,SCH PHARM,DEPT PHARMACEUT SCI,TOXICOL PROGRAM,STORRS,CT 06269
[2] UNIV CONNECTICUT,DEPT MOLEC & CELL BIOL,STORRS,CT 06269
关键词
D O I
10.1006/taap.1995.1031
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Acetaminophen (APAP) is a commonly used analgesic and antipyretic agent which, in high doses, causes liver and kidney necrosis in man and animals. Damage in both target organs is greatly dependent upon biotransformation. However, in the CD-1 mouse only males exhibit cytochrome P450-dependent nephrotoxicity and selective protein covalent binding. The lack of renal toxicity in female mice may reflect the androgen dependence of renal CYP2EI. To study this, female mice were pretreated with testosterone propionate and then challenged 6 days later with APAP. Groups of control males and females were similarly challenged with APAP for comparison. All groups exhibited hepatotoxicity after APAP with similar glutathione (GSH) depletion, covalent binding, centrilobular necrosis, and elevation of plasma sorbitol dehydrogenase activity. By contrast, APAP-induced nephrotoxicity occurred only in males and in the females pretreated with testosterone. No nephrotoxicity was evident in APAP-challenged control females. The selective pattern of hepatic and renal protein arylation previously reported for male mice was similarly observed in testosterone-pretreated female mice. Western blot analysis of microsomes showed that testosterone increased renal CYP2E1 levels without altering hepatic CYP2EI. Testosterone pretreatment, in vivo, also resulted in increased activation of APAP in vitro in kidney microsomes with no effect on the in vitro activation of APAP in liver microsomes. These data suggest that APAP-mediated GSH depletion, covalent binding, and toxicity in the kidneys of testosterone-pretreated females results from increased APAP activation by the testosterone-induced renal CYP2E1. This further suggests that renal, rather than hepatic, biotransformation of APAP to a toxic electrophile is central to APAP-induced nephrotoxicity in the mouse. (C) 1995 Academic Press, Inc.
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页码:257 / 271
页数:15
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