期刊
XENOBIOTICA
卷 44, 期 2, 页码 135-145出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/00498254.2013.848310
关键词
Aristolochic acid; aristolochic acid nephropathy; Balkan endemic nephropathy; cytochromes P450 1A1 and 1A2; genetically engineered animal models; metabolic activation and detoxication; NAD(P)H:quinone oxidoreductase
资金
- Grant Agency of the Czech Republic [303/09/0472]
- Ministry of Education of the Czech Republic [UNCE 204025/2012]
- Cancer Research UK
- Cancer Research UK [14329] Funding Source: researchfish
- Medical Research Council [1524896] Funding Source: researchfish
1. Aristolochic acid I (AAI) is the predominant component in plant extract of Aristolochia genus that is involved in development of aristolochic acid nephropathy, Balkan endemic nephropathy and urothelial cancer. The diseases do not develop in all individuals exposed to AAI and patients exhibit different clinical outcomes. Differences in the activities of enzymes catalyzing the metabolism of AAI might be one of the reasons for this individual susceptibility. 2. Understanding which human enzymes are involved in reductive activation of AAI generating AAI-DNA adducts, and/or its detoxication to the O-demethylated metabolite, aristolochic acid Ia (AAIa), is necessary in the assessment of the susceptibility to this compound. 3. This review summarizes the results of the latest studies utilizing genetically engineered mouse models to identify which human and rodent enzymes catalyze the reductive activation of AAI to AAI-DNA adducts and its oxidative detoxication to AAIa in vivo. 4. The use of hepatic cytochrome P450 (Cyp) reductase null (HRN) mice, in which NADPH: Cyp oxidoreductase (Por) is deleted in hepatocytes, Cyp1a1((-/-)), Cyp1a2((-/-)) single-knockout, Cyp1a1/1a2((-/-)) double-knockout and CYP1A-humanized mice revealed that mouse and human CYP1A1 and 1A2, besides mouse NAD(P)H:quinone oxidoreductase, were involved in the activation of AAI but CYP1A1 and 1A2 also oxidatively detoxified AAI.
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