title: Glutathione S-transferase M1 polymorphism and lung cancer risk in African-Americans.
abstract: 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 adenocarcinoma (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 > or =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.
authors.affiliation: Division of Pulmonary and Critical Care Medicine, Harlem Hospital Center, Columbia College of Physicians and Surgeons, New York, NY 10037, USA. jf24@columbia.edu
authors.forename: J G
authors.initials: JG
authors.lastname: Ford
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: M M
authors.initials: MM
authors.lastname: O'Sullivan
authors.forename: R
authors.initials: R
authors.lastname: Demopoulos
authors.forename: S
authors.initials: S
authors.lastname: Garte
authors.forename: E
authors.initials: E
authors.lastname: Taioli
authors.forename: P W
authors.initials: PW
authors.lastname: Brandt-Rauf
mesh_terms: D001741:Black or African American; D044383:Black People / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D017353:Gene Deletion; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D008175:Lung Neoplasms / Q000201:enzymology* / Q000235:genetics; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects
chemical_list: D005982:Glutathione Transferase