title: GSTP1 polymorphism, cigarette smoking and cervical cancer risk in Korean women.
abstract: Previous studies have suggested that glutathione S-transferase (GST) genotypes may play a role in determining susceptibility to cervical cancer, though the data have often been conflicting. The objective of this study was to examine the effect of GSTP1 polymorphism on cervical carcinogenesis. The studied subjects, patients who were pathologically diagnosed with invasive cervical cancer yielding positive results for human papillomavirus (HPV) (n=342), were compared to healthy, normal, female controls (n=707). DNA from peripheral blood samples from studied subjects whose GSTP1 specific sequences had been determined by PCR with allele-specific primers were reviewed in comparison with the normal controls. The genetic susceptibility of GSTP1 (11q 13.1) in cervical carcinogenesis was determined by examining the effect of gene and environmental factors by the different histopathologic types of invasive cervical cancers. In assessing polymorphism GSTP1, the percentages of individuals homozygous for the A allele, homozygous for the G allele, and heterozygous for the two alleles were 66.8%, 3.9%, and 29.3%, respectively, in the control group, and 64.3%, 4.1%, and 31.6%, respectively, among in women with cervical cancer. Compared with GSTP1 G allele positive (GA or G/G), the odds ratio (OR) (95% confidence interval) for GSTP1 A/A was 1.0 (0.7 - 1.4) for invasive cervical cancer. However, the risk increased with GSTP1 A/A among ever smokers (3.9, 1.7 - 8.9, p-value=0.0012) compared with GSTP1 G allele positive among nonsmokers. In particular, this risk was higher among women with squamous cell carcinoma (4.7, 2.0 - 10.8, p=0.0003). Polymorphism of GSTP1 among smoking women was associated with a higher risk of developing cervical cancer.
authors.affiliation: Department of Epidemilogy and Health Promotion, Graduate School of Health Science and Management, Yonsei University, Seoul, Korea.
authors.forename: Sun Ha
authors.initials: SH
authors.lastname: Jee
authors.forename: Jong Eun
authors.initials: JE
authors.lastname: Lee
authors.forename: Sook
authors.initials: S
authors.lastname: Kim
authors.forename: Ji Hyun
authors.initials: JH
authors.lastname: Kim
authors.forename: Soo Jong
authors.initials: SJ
authors.lastname: Um
authors.forename: Sung Jong
authors.initials: SJ
authors.lastname: Lee
authors.forename: Sung Eun
authors.initials: SE
authors.lastname: Namkoong
authors.forename: Jong Sup
authors.initials: JS
authors.lastname: Park
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D007527:Isoenzymes / Q000235:genetics*; D019656:Loss of Heterozygosity; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012306:Risk; D012907:Smoking; D002583:Uterine Cervical Neoplasms / Q000209:etiology* / Q000235:genetics
chemical_list: D007527:Isoenzymes; C496556:GSTP1 protein, human; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase