Association of estrogen receptor α PvuII and XbaI polymorphisms with prostate cancer susceptibility and risk stratification: a meta-analysis from case-control studies
Authors Zhao YN, Zheng X, Zhang LJ, Hu Q, Guo YT, Jiang H, Shi SN, Zhang X
Received 14 January 2017
Accepted for publication 29 March 2017
Published 29 June 2017 Volume 2017:10 Pages 3203—3210
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Dr Ingrid Espinoza
Yining Zhao,1,* Xi Zheng,2,* Lijie Zhang,3 Qiang Hu,3 Yitian Guo,3 Hua Jiang,3 Shennan Shi,4 Xiang Zhang1
1Department of Urology, Qilu Hospital of Shandong University, Jinan, 2Department of Urology, Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 3Department of Urology, Affiliated Zhongda Hospital, Medical School, Southeast University, Nanjing, 4Department of General Surgery, Qilu Hospital of Shandong University, Jinan, People’s Republic of China
*These authors contributed equally to this work
Background: Studies on the association between two single nucleotide polymorphisms (SNPs) in estrogen receptor α (ERα), PvuII (rs2234693 T>C) and XbaI (rs9340799 A>G), and the prostate cancer risk are inconsistent. Therefore, we performed a meta-analysis to derive a more accurate estimation of this relationship.
Methods: A literature search of PubMed, Embase, Web of Science databases until October 1, 2016, was conducted. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to assess the strength of this association.
Results: Eighteen case-control studies, with a total of 3,317 prostate cancer patients and 8,324 controls, were included. Results showed that both PvuII and XbaI polymorphisms were significantly associated with a higher prostate cancer risk in overall populations. To derive a more accurate estimation, subgroup analysis stratified by ethnicity revealed that this relationship existed only in Caucasians, but not in Asians. Furthermore, PvuII polymorphism was significantly associated with high Gleason grade (Gleason score ≥7) cancers.
Conclusion: The current meta-analysis demonstrates that ERα PvuII and XbaI polymorphisms are associated with a higher prostate cancer risk in Caucasians, but not in Asians, and PvuII polymorphism is significantly associated with high Gleason grade tumors, indicating the probability of inherited susceptibility to prostate cancer arising from different genomic ERα SNPs, which may help us understand the pathogenesis of prostate cancer in Caucasians.
Keywords: estrogen receptor α, PvuII, XbaI, prostate cancer, meta-analysis
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