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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
4
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pubmed:dateCreated |
1997-1-6
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pubmed:abstractText |
Studies were carried out to test the hypothesis that inflammatory liver disease increases the expression of specific cytochrome P-450 isoenzymes involved in aflatoxin B1 (AFB) activation. The immunohistochemical expression and localization of various human cytochrome P-450 isoforms, including CYP2A6, CYP1A2, CYP3A4, and CYP2B1, were examined in normal human liver and liver with hepatitis and cirrhosis. The constitutive expression of CYP3A4 in normal liver showed a characteristic pattern of distribution in centrilobular hepatocytes, whereas CYP1A2, CYP2A6, and CYP2B1 were expressed uniformly throughout the liver acinus. In sections of liver infected with hepatitis B virus (HBV) or hepatitis C virus (HCV), the expression of CYP2A6 was markedly increased in hepatocytes immediately adjacent to areas of fibrosis and inflammation. CYP3A4 and CYP2B1 were induced to a lesser degree, and expression of CYP1A2 was unaffected. In HBV-infected liver, double immunostaining revealed that overexpression of CYP2A6 occurred in hepatocytes expressing the HBV core antigen. In HCV-infected liver, CYP2A6, CYP3A4, and CYP2B1 were overexpressed in hepatocytes with hemosiderin pigmentation. These results suggest that alterations in phenotypic expression of specific P-450 isoenzymes in hepatocytes associated with hepatic inflammation and cirrhosis might increase susceptibility to AFB genotoxicity.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Aflatoxin B1,
http://linkedlifedata.com/resource/pubmed/chemical/Carcinogens,
http://linkedlifedata.com/resource/pubmed/chemical/Cytochrome P-450 Enzyme System,
http://linkedlifedata.com/resource/pubmed/chemical/Isoenzymes,
http://linkedlifedata.com/resource/pubmed/chemical/Viral Core Proteins
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pubmed:status |
MEDLINE
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pubmed:issn |
0192-6233
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
24
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
458-67
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pubmed:dateRevised |
2009-11-19
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pubmed:meshHeading |
pubmed-meshheading:8864187-Adult,
pubmed-meshheading:8864187-Aflatoxin B1,
pubmed-meshheading:8864187-Aged,
pubmed-meshheading:8864187-Budd-Chiari Syndrome,
pubmed-meshheading:8864187-Carcinogens,
pubmed-meshheading:8864187-Cytochrome P-450 Enzyme System,
pubmed-meshheading:8864187-Drug-Induced Liver Injury,
pubmed-meshheading:8864187-Female,
pubmed-meshheading:8864187-Hepatitis, Viral, Human,
pubmed-meshheading:8864187-Humans,
pubmed-meshheading:8864187-Immunohistochemistry,
pubmed-meshheading:8864187-Isoenzymes,
pubmed-meshheading:8864187-Liver,
pubmed-meshheading:8864187-Liver Cirrhosis,
pubmed-meshheading:8864187-Liver Cirrhosis, Alcoholic,
pubmed-meshheading:8864187-Male,
pubmed-meshheading:8864187-Middle Aged,
pubmed-meshheading:8864187-Viral Core Proteins
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pubmed:articleTitle |
Overexpression of cytochrome P-450 isoforms involved in aflatoxin B1 bioactivation in human liver with cirrhosis and hepatitis.
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pubmed:affiliation |
Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Canada.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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