Linked Life Data

12569554

Source:http://linkedlifedata.com/resource/pubmed/id/12569554

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2003-2-5
pubmed:abstractText
Cancer risk can be influenced by the exposure to endogenous or environmental toxins. Polymorphic enzymes involved in the metabolic activation/detoxification of carcinogens may account for individual variations of risk. We studied the polymorphisms of five enzymes of the P450 superfamily, CYP1A1, CYP1A2, CYP2D6, CYP2E1 and CY3A4, as risk factors for liver disease progression and cancer in hepatitis C virus-infected patients. CYP genotyping was performed by polymerase chain reaction (PCR) restriction fragment length polymorphism or allele-specific PCR. Different stages of disease were considered, as follows: 90 asymptomatic carriers and 87 chronic hepatitis, 92 cirrhosis and 91 hepatocellular carcinoma (HCC) cases. Reference allele frequencies were obtained from 99 blood donors. Allele distributions among categories were compared using the chi(2) test. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to express relative risks. Independent associations were modeled by correspondence analysis and logistic regression. Frequencies of the CYP1A1 highly inducible alleles, MspI m2 and Val, were increased in liver disease patients compared with carriers; no specific association with HCC was found. The high-activity CYP2E1 c2 allele was underrepresented among HCC patients with respect to other HCV categories, including cirrhosis. CYP2D6 poor metabolizer (PM) genotypes were significantly more frequent in healthy subjects (7.1%) and carriers (11.1%) than in hepatitis/cirrhosis (4.6%) and HCC (1.2%) patients. This was confirmed by multivariable analysis. PM genotypes protected against progressive disease as ORs reduced proportionally to stage. The age at diagnosis for HCC was anticipated in non-PM individuals. No differences were seen for CYP1A2 and CYP3A4 genes. Polymorphic variants of CYP genes may contribute to the progression of liver disease and HCC risk in HCV-infected subjects.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0020-7136
pubmed:author
pubmed:copyrightInfo
Copyright 2003 Wiley-Liss, Inc.
pubmed:issnType
Print
pubmed:day
10
pubmed:volume
104
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
310-7
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:12569554-Aged, pubmed-meshheading:12569554-Carcinoma, Hepatocellular, pubmed-meshheading:12569554-Case-Control Studies, pubmed-meshheading:12569554-Cytochrome P-450 CYP1A1, pubmed-meshheading:12569554-Cytochrome P-450 CYP1A2, pubmed-meshheading:12569554-Cytochrome P-450 CYP2D6, pubmed-meshheading:12569554-Cytochrome P-450 CYP2E1, pubmed-meshheading:12569554-Cytochrome P-450 CYP3A, pubmed-meshheading:12569554-Cytochrome P-450 Enzyme System, pubmed-meshheading:12569554-Female, pubmed-meshheading:12569554-Genetic Predisposition to Disease, pubmed-meshheading:12569554-Genotype, pubmed-meshheading:12569554-Hepacivirus, pubmed-meshheading:12569554-Hepatitis C, Chronic, pubmed-meshheading:12569554-Humans, pubmed-meshheading:12569554-Liver Cirrhosis, pubmed-meshheading:12569554-Liver Neoplasms, pubmed-meshheading:12569554-Male, pubmed-meshheading:12569554-Middle Aged, pubmed-meshheading:12569554-Polymerase Chain Reaction, pubmed-meshheading:12569554-Polymorphism, Genetic, pubmed-meshheading:12569554-Polymorphism, Restriction Fragment Length
pubmed:year
2003
pubmed:articleTitle
CYP enzyme polymorphisms and susceptibility to HCV-related chronic liver disease and liver cancer.
pubmed:affiliation
Associazione Studi Avanzati Epatiti Virali, Bonate Sotto (BG), Italy.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't