Localization and Age-Related Changes in Cytochrome P450 Expression in APA Hamster Livers
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概要
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To establish the baseline data, age-related changes and the regional expression of the hepatic P450 isozymes in Syrian hamsters of the APA strain at 3, 6, 12, 18 months old were examined by immunological techniques. Immunohistochemical analysis of liver serial sections revealed that the midzonal and perivenous regions (zones 2 and 3, respectively) were stained with the anti-rat CYP1A1/2, 2B1/2 and 2E1 antibodies. These three antibodies most intensely stained the hepatocytes around the central vein. An anti-rat CYP3A2 staining section had a staining pattern with equally intense reactions in zones 2 and 3. On the other hand, CYP2C6, 2C11 and 4A1 were distributed diffusely throughout the hepatic acinus. There was no age-related difference in the expression pattern of any of the P450 isozymes examined. Total P450 content had a peak at 6 months of age and decreased to 60% of that level thereafter. Western-blot analysis revealed that the peak expressions of the isozymes detected with anti-rat CYP1A1/2, 2C6, 2E1 and 3A2 antibodies were observed in 6-month-old hamsters and declined in older ones. The CYP2B and 2C11 content reached the maximum at the age of 6 months and maintained almost the same level thereafter. The CYP4A level did not change from 3 to 6 months, and then declined to about 40% of the younger level at 12 and 18 months of age. These results suggest that the hepatic P450 isozymes of APA hamsters have region-specific expressions and most isozymes have their peaks of expression at 6 months of age, which differs from the patterns for rat P450.
- 社団法人 日本実験動物学会の論文
著者
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YOSHIKAWA Yasuhiro
Department of Biomedical Science, Graduate School of Agricultural and Life Sciences, The University
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TAKATORI Atsushi
Department of Biomedical Science, Graduate School of Agricultural and Life Sciences, The University
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KAWAMURA Seiji
Department of Biomedical Science, Graduate School of Agricultural and Life Sciences, the University
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Yoshikawa Yasuhiro
Dep. Of Biomedical Sci. Graduate School Of Agricultural And Life Sciences The Univ. Of Tokyo
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Kyuwa S
Univ. Tokyo Tokyo Jpn
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ITAGAKI Shinichi
Department of Biomedical Science, School of Agricultural and Life Sciences, University of Tokyo
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AKAHORI Mizuho
Medical Research Laboratories, WYETH LEDERLE JAPAN
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Yoshikawa Y
Dep. Of Biomedical Sci. Graduate School Of Agricultural And Life Sciences The Univ. Of Tokyo
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Kawamura S
Department Of Biomedical Science Graduate School Of Agricultural And Life Sciences The University Of
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Kawamura Seiji
Department Of Biomedical Science Graduate School Of Agricultural And Life Sciences The University Of
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Itagaki S
Department Of Biomedical Science Graduate School Of Agricultural And Life Sciences The University Of
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吉川 泰弘
Department Of Biomedical Science Graduate School Of Agricultural And Life Sciences The University Of
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Takatori Atsushi
Department Of Biomedical Science Graduate School Of Agricultural And Life Sciences The University Of
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Kyuwa Shigeru
Department Of Biomedical Science Graduate School Of Agricultural And Life Sciences University Of Tok
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Kyuwa Shigeru
Department Of Reproductive And Developmental Biology Institute Of Medical Science The University Of
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Kyuwa Shigeru
Center For Experimental Medicine Institute Of Medical Science The University Of Tokyo
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Yoshikawa Yasuhiro
Department Of Biomedical Science Faculty Of Agriculture The University Of Tokyo
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吉川 泰弘
Department Of Biomedical Science Faculty Of Agriculture The University Of Tokyo
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Akahori Mizuho
Medical Research Laboratories Wyeth Lederle Japan
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Kawamura Seiji
Department Of Biomedical Science Faculty Of Agriculture And Life Sciences University Of Tokyo
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Itagaki Shinichi
Department Of Biomedical Science Faculty Of Agriculture The University Of Tokyo
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KAWAMURA Seiji
Department of Agriculture, The University of Tokyo
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