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CYP450 polymorphisms as risk factors for early-onset lung cancer: Gender-specific differences.
Carcinogenesis 30, 1161-1169 (2009)
Cytochrome P450 (CYP) enzymes, involved in metabolism of tobacco carcinogens, are also involved in estrogen metabolism and many are regulated by estrogens. These genes may thus be of relevance to gender-specific differences in lung cancer risk, particularly in early-onset lung cancer, where a high proportion of women is observed. We conducted a case-control study to investigate genetic polymorphisms in cytochromes that might modify the risk of developing early-onset lung cancer. In total, 638 Caucasian patients under the age of 51 with primary lung cancer and 1300 cancer-free control individuals, matched by age and sex, were included in this analysis. Thirteen polymorphisms in the CYP1A1, CYP1B1, CYP2A13, CYP3A4 and CYP3A5 genes were analyzed. No significant association was found for any of the analyzed polymorphisms and lung cancer risk overall. However, among women, a significantly increased risk of early-onset lung cancer was observed for carriers of the minor allele of CYP1B1 SNP rs1056836 [odds ratio (OR) 1.97; 95% confidence interval (CI) 1.32-2.94; P < 0.001]. Also, a non-significant increase in lung cancer risk was observed in the group of women carriers of the minor allele of CYP2A13 SNP rs1709084 (OR 1.64; 95% CI 1.00-2.70; P = 0.05). The effect of these two polymorphisms was shown to be modified by smoking. Haplotype analysis was performed for CYP1B1 and CYP2A13. No differences between cases and controls were observed for both genes (P = 0.63 and P = 0.42 for CYP1B1 and CYP2A13, respectively). Our results suggest that the CYP1B1 and the CYP2A13 genotypes may contribute to individual susceptibility to early-onset lung cancer in women.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
single-nucleotide polymorphisms; tobacco-specific carcinogen; cytochromes P450 1A1; human CYP2A13 gene; metabolic-activation; susceptibility locus; cigarette-smoking; african-american-americans; pooled analysis; breast-cancer
Language
english
Publication Year
2009
HGF-reported in Year
0
ISSN (print) / ISBN
0143-3334
e-ISSN
1460-2180
Journal
Carcinogenesis
Quellenangaben
Volume: 30,
Issue: 7,
Pages: 1161-1169
Publisher
Oxford University Press
Publishing Place
England
Reviewing status
Peer reviewed
Institute(s)
Institute of Epidemiology (EPI)
POF-Topic(s)
30503 - Chronic Diseases of the Lung and Allergies
Research field(s)
Genetics and Epidemiology
PSP Element(s)
G-503900-003
G-503900-001
G-503900-001
PubMed ID
19414505
Erfassungsdatum
2009-12-04