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Breast Cancer Research and Treatment

, Volume 122, Issue 2, pp 483–488 | Cite as

Lack of an association between a functional polymorphism in the interleukin-6 gene promoter and breast cancer risk: a meta-analysis involving 25,703 subjects

  • Ke-Da Yu
  • Gen-Hong Di
  • Lei Fan
  • Ao-Xiang Chen
  • Chen Yang
  • Zhi-Ming Shao
Epidemiology

Abstract

The association between a single-nucleotide polymorphism (SNP) −174G > C (rs1800795) located in the IL-6 gene promoter and breast cancer risk is still controversial and ambiguous. We performed in this study a more precise estimation of the relationship by meta-analyzing the currently available evidence from literature. A total of 11 publications containing 12 studies including 10,137 cases and 15,566 controls were identified. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the strength of association in the codominant model, dominant model, and recessive model. When all the studies were pooled into the meta-analysis, there was no evidence showing a significant association between −174G > C and breast cancer risk (for CC vs. GG: OR = 1.024, 95% CI: 0.935–1.121; for GC vs. GG: OR = 1.008, 95% CI: 0.946-1.073; for dominant model: OR = 0.980, 95% CI: 0.857–1.121; and for recessive model: OR = 1.027, 95% CI: 0.944–1.117). In the subgroup analyses by ethnicity, no significant associations were observed in any genetic models. In summary, the present meta-analysis suggests that the functional polymorphism −174G > C within the IL-6 gene promoter is not associated with breast cancer risk. Identifying a unique SNP as a breast cancer risk predictor remains a very challenging task.

Keywords

Interleukin-6 rs1800795 Breast cancer Susceptibility Meta-analysis 

Notes

Acknowledgments

This research is supported by grants from the National Basic Research Program of China (2006CB910501) and the National Natural Science Foundation of China (30971143, 30972936).

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Copyright information

© Springer Science+Business Media, LLC. 2009

Authors and Affiliations

  • Ke-Da Yu
    • 1
    • 2
  • Gen-Hong Di
    • 1
    • 2
  • Lei Fan
    • 1
    • 2
  • Ao-Xiang Chen
    • 1
    • 2
  • Chen Yang
    • 1
    • 2
  • Zhi-Ming Shao
    • 1
    • 2
    • 3
  1. 1.Department of Breast SurgeryCancer Hospital/Cancer Institute, Fudan UniversityShanghaiPeople’s Republic of China
  2. 2.Department of OncologyShanghai Medical College, Fudan UniversityShanghaiPeople’s Republic of China
  3. 3.Institutes of Biomedical ScienceFudan UniversityShanghaiPeople’s Republic of China

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