title: Genetic polymorphism of XRCC3 Thr241Met and breast cancer risk: case-control study in Korean women and meta-analysis of 12 studies.
abstract: To evaluate the relationship of genetic polymorphism in XRCC3 Thr(241)Met and the risk of breast cancer, a hospital-based case-control study was conducted in Korea. Histologically confirmed breast cancer cases (n = 574) and controls (n = 502) with no present or previous history of cancer were recruited from several teaching hospitals in Seoul during 1995-2001. Information on demographic characteristics and other information were collected by interviewed questionnaire. Genetic polymorphisms of XRCC3 Thr(241)Met (C > T) was determined by single base extention assay. The frequency of Thr/Thr, Thr/Met, and Met/Met genotype were 89.4, 10.4, 0.2% in cases and 92.3, 7.7, 0.0% in controls, respectively. Genotype distribution in controls fit well to the Hardy-Weinberg equilibrium (P = 0.74). XRCC3 codon 241 Thr/Met or Met/Met genotype moderately increased the risk of breast cancer (OR = 1.4, 95% CI: 0.87-2.33), but not significant in this study. In the results of meta-analysis using twelve reports, however, Thr/Met or Met/Met genotype increased the risk of breast cancer (OR = 1.08, 95%CI: 1.00-1.17). In conclusion, although the genetic polymorphism of XRCC3 Thr(241)Met was unlikely to have a substantial overall association in Korean women, the meta-analysis of studies, including ours, provided that Thr/Met and Met/Met was weakly increased the risk of breast cancer compare to Thr/Thr genotype.
authors.affiliation: Department of Preventive Medicine, Cancer Research Institute, Seoul National University College of Medicine, 28 Yongon-Dong Chongno-Gu, Seoul 110-799, South Korea.
authors.forename: Sang-Ah
authors.initials: SA
authors.lastname: Lee
authors.forename: Kyoung-Mu
authors.initials: KM
authors.lastname: Lee
authors.forename: Sue Kyung
authors.initials: SK
authors.lastname: Park
authors.forename: Ji-Yeob
authors.initials: JY
authors.lastname: Choi
authors.forename: Bongcheol
authors.initials: B
authors.lastname: Kim
authors.forename: Jinwu
authors.initials: J
authors.lastname: Nam
authors.forename: Keun-Young
authors.initials: KY
authors.lastname: Yoo
authors.forename: Dong-Young
authors.initials: DY
authors.lastname: Noh
authors.forename: Sei-Hyun
authors.initials: SH
authors.lastname: Ahn
authors.forename: Daehee
authors.initials: D
authors.lastname: Kang
mesh_terms: D044466:Asian People / Q000235:genetics*; D001943:Breast Neoplasms / Q000453:epidemiology / Q000235:genetics*; D016022:Case-Control Studies; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease / Q000453:epidemiology / Q000235:genetics*; D006801:Humans; D007723:Korea / Q000453:epidemiology; D008875:Middle Aged; D011110:Polymorphism, Genetic; D044465:White People / Q000235:genetics
chemical_list: D004268:DNA-Binding Proteins; C110901:X-ray repair cross complementing protein 3