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The Ku70 −1310C/G promoter polymorphism is associated with breast cancer susceptibility in Chinese Han population

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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.

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Acknowledgments

This work was supported by grants from the National Natural Science Foundation of China (no. 30900383).

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Authors and Affiliations

  1. Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China

    Wenshan He, Sijia Luo, Tao Huang & Xiaoling Wu

  2. Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 156 Wujiadun Road, Wuhan, 430022, Hubei, China

    Jinghua Ren & Qingyao Zhu

  3. Department of Breast Surgery, Hubei Provincial Tumor Hospital, Wuhan, 430079, China

    Jun Shao

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  1. Wenshan He
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  2. Sijia Luo
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  3. Tao Huang
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  4. Jinghua Ren
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  5. Xiaoling Wu
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  6. Jun Shao
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  7. Qingyao Zhu
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Correspondence to Jinghua Ren.

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He, W., Luo, S., Huang, T. et al. The Ku70 −1310C/G promoter polymorphism is associated with breast cancer susceptibility in Chinese Han population. Mol Biol Rep 39, 577–583 (2012). https://doi.org/10.1007/s11033-011-0773-7

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  • DOI: https://doi.org/10.1007/s11033-011-0773-7

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