title: The Ku70 -1310C/G promoter polymorphism is associated with breast cancer susceptibility in Chinese Han population.
abstract: Ku70 plays an important role in the DSBR (DNA double-strand breaks repair) and maintenance of genomic integrity. Genetic variations within human Ku70 have been demonstrated to be associated with increased risk of several types of cancers. In this hospital-based case-control study, we aimed to investigate whether a single nucleotide polymorphism (SNP) in the promoter region (rs2267437) of Ku70 gene is associated with susceptibility to breast cancer in Chinese Han population. A total of 293 patients with breast cancer and 301 age-matched healthy controls were enrolled in this study. The Ku70 -1310C/G polymorphism was determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis. A significant difference in genotype distribution and allele frequency was observed between patients and controls. The CG or GG carries were at higher risk of breast cancer compared with the CC homozygotes (OR=1.43, 95% CI=1.02-2.00, P=0.038 and OR=3.53, 95% CI=1.60-7.80, P=0.002, respectively). Further stratification analysis revealed that G allele was associated with an increased risk of breast cancer among premenopausal women (OR=1.68, 95% CI=1.21-2.33, P=0.002), but not in postmenopausal women (OR=1.33, 5% CI=0.85-2.10, P=0.216). Our study suggests that the Ku70 -1310C/G promoter polymorphism may be a susceptibility factor for breast cancer in Chinese Han population.
authors.affiliation: Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
authors.forename: Wenshan
authors.initials: W
authors.lastname: He
authors.forename: Sijia
authors.initials: S
authors.lastname: Luo
authors.forename: Tao
authors.initials: T
authors.lastname: Huang
authors.forename: Jinghua
authors.initials: J
authors.lastname: Ren
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Wu
authors.forename: Jun
authors.initials: J
authors.lastname: Shao
authors.forename: Qingyao
authors.initials: Q
authors.lastname: Zhu
mesh_terms: D034961:Antigens, Nuclear / Q000235:genetics*; D044466:Asian People / Q000235:genetics; D001483:Base Sequence; D001943:Breast Neoplasms / Q000235:genetics*; D053903:DNA Breaks, Double-Stranded; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D006801:Humans; D000072200:Ku Autoantigen; D016015:Logistic Models; D008969:Molecular Sequence Data; D016017:Odds Ratio; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D017698:Postmenopause / Q000235:genetics; D017697:Premenopause / Q000235:genetics; D011401:Promoter Regions, Genetic / Q000235:genetics*; D017422:Sequence Analysis, DNA
chemical_list: D034961:Antigens, Nuclear; D004268:DNA-Binding Proteins; C000606509:Xrcc6 protein, human; D000072200:Ku Autoantigen