Effects of age increase on hepatic expression and activity of cytochrome P450 in male C57BL/6 mice
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- 作者：Hui Chan Kwak ; Hyoung Chin Kim ; Soo Jin Oh ; Sang Kyum Kim
- 关键词：Drug ; metabolizing enzyme ; Cytochrome P450 ; Aging ; Male mice ; Liver
- 刊名：Archives of Pharmacal Research
- 出版年：2015
- 出版时间：May 2015
- 年：2015
- 卷：38
- 期：5
- 页码：857-864
- 全文大小：838 KB
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Hyoung Chin Kim (2)
Soo Jin Oh (2)
Sang Kyum Kim (1)
1. College of Pharmacy, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 305-764, Republic of Korea
2. Bio-Evaluation Center, KRIBB, Chungbuk, Ochang, Republic of Korea - 刊物主题：Pharmacy; Pharmacology/Toxicology;
- 出版者：Springer Netherlands
- ISSN：1976-3786
文摘
Effects of aging on hepatic expression and activity of cytochrome P450 (CYP) isoforms were investigated in male mice aged 2, 6, 18, and 30?months. Microsomal protein, total CYP, cytochrome b5 and NADPH-dependent cytochrome P450 reductase contents in liver were fully expressed in young (2-month-old) mice. Neither Cyp1a1 nor Cyp2c was detected in any aged mice. And Cyp1a2 was maximally expressed at 2?months and decreased with age. Hepatic levels of Cyp2b10 and Cyp3a11 were decreased in 30-month-old mice. Hepatic Cyp2e1 levels were constantly maintained from 2-month to 30-month old mice. Hepatic activities of ethoxyresorufin-em class="EmphasisTypeItalic">O-deethylase and methoxyresorufin-em class="EmphasisTypeItalic">O-demethylase were gradually decreased after 6?months. The 30-month-old mice exhibited the lowest activity of midazolam 1-hydroxylase. Pentoxyresorufin-em class="EmphasisTypeItalic">O-depenthylase activity was decreased in 30-month-old mice, but not statistically significant. There were no significant differences in hepatic activities of chlorzoxazone 6-hydroxylase and midazolam 4-hydroxylase. The present study shows that increasing age, especially 30-month-old mice, leads to decrease in expression and activity of hepatic CYP isoforms, suggesting that aging mice exhibit poor hepatic drug-metabolizing capacity.