期刊
CARCINOGENESIS
卷 21, 期 11, 页码 1971-1975出版社
OXFORD UNIV PRESS
DOI: 10.1093/carcin/21.11.1971
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资金
- NCI NIH HHS [CA01643] Funding Source: Medline
- NIEHS NIH HHS [ES06831, ES08363] Funding Source: Medline
Glutathione S-transferase M1 (GSTM1) can detoxify many carcinogens, including polycyclic aromatic hydrocarbons such as those from cigarette smoke. Though a number of studies have been published about the association between GSTM1 polymorphism and lung cancer, this association has received limited attention in the African-American population. We conducted a case-control study to investigate the role of GSTM1 polymorphism in the development of lung cancer in African-Americans. Specimens of DNA from 117 lung cancer cases and 120 controls were assayed for detection of GSTM1 genotype by polymerase chain reaction (PCR), The odds ratios (ORs) and 95% confidence intervals (CIs) for lung cancer associated with homozygous deletion of the GSTM1 gene and other risk factors were estimated by logistic regression. Thirty-seven of the 117 cases (31.6%) and 24 of the 120 controls (20.0%) had the GSTM1 null genotype; the OR was 2.10 (95% CI 1.07-4.11) after adjustment for age, gender and smoking. The association was higher for squamous cell carcinoma (OR 2.98, 95% CI 1.09-8.19) than for adenocarccnonma (OR 1.95, 95% CI 0.81-4.66). We observed a stronger association between GSTM1 null genotype and lung cancer among heavy smokers with greater than or equal to 30 pack-years (OR 4.35, 95% CI 1.16-16.23). This association was also found in squamous cell carcinoma (OR 6.26, 95% CI 1.31-29.91), In the analysis combining GSTM1 polymorphism and smoking, smokers with the null genotype had high risk (OR 8.19, 95% CI 2.35-28.62) compared with non-smokers with the wild-type genotype, and the risk increased with smoking cigarette pack-years (P = 0.0001 for trend). Our results suggest that GSTM1 polymorphism plays a role in the development of lung cancer and modifies the risk for smoking-related lung cancer in African-Americans.
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