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Disease Markers
Volume 2014 (2014), Article ID 484729, 9 pages
http://dx.doi.org/10.1155/2014/484729
Review Article

Association of the Three Common SNPs of Cyclooxygenase-2 Gene (rs20417, rs689466, and rs5275) with the Susceptibility of Breast Cancer: An Updated Meta-Analysis Involving 34,590 Subjects

1Department of Oncology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, China
2Center for Translational Medicine, Frontier Institute of Science and Technology (FIST), Xi’an Jiaotong University, Xi’an 710004, China
3School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710061, China

Received 16 May 2014; Revised 17 July 2014; Accepted 25 July 2014; Published 18 August 2014

Academic Editor: Robert Pichler

Copyright © 2014 Zhi-Jun Dai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Several single nucleotide polymorphisms have been identified in cyclooxygenase-2 (COX-2) genes (e.g., −765 G>C (rs20417), −1195G>A (rs689466), and 8473 C>T (rs5275)). The association of these SNPs with the risk of different cancer types is still controversial. This study aims to evaluate the correlation between these SNPs and breast cancer risk in different ethnic groups. We have searched PubMed, Web of Knowledge, and Embase for relevant studies. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to estimate the strength of the associations. A total of 13 studies (15,330 cases and 19,260 controls) were eligible for meta-analysis. This meta-analysis showed that COX-2 rs20417 polymorphism was correlated with an increased risk of breast cancer in Caucasians, while rs689466 was associated with a decreased risk of breast cancer in Caucasians. The rs5275 polymorphism had no association with breast cancer risk.