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Critical Reviews™ in Eukaryotic Gene Expression
IF: 2.156 5-Year IF: 2.255 SJR: 0.649 SNIP: 0.599 CiteScore™: 3

ISSN Print: 1045-4403
ISSN Online: 2162-6502

Critical Reviews™ in Eukaryotic Gene Expression

DOI: 10.1615/CritRevEukaryotGeneExpr.2019026184
pages 243-249

Association between ABCB1 G2677T/A Polymorphism and Breast Cancer Risk: A Meta-Analysis

Hongchao Liu
The New Area People's Hospital of Luoyang
Zhihao Wei
Department of Pathology, The New Area People's Hospital of Luoyang, The Teaching Hospital of Henan University of Science and Technology, Luoyang 471023, Henan Province, People's Republic of China
Kangke Shi
Department of Pathology, The New Area People's Hospital of Luoyang, The Teaching Hospital of Henan University of Science and Technology, Luoyang 471023, Henan Province, People's Republic of China
Yu Zhang
Department of Pathology, The New Area People's Hospital of Luoyang, The Teaching Hospital of Henan University of Science and Technology, Luoyang 471023, Henan Province, People's Republic of China


Several studies have investigated the relationship between ABCB1 G2677T/A polymorphism and breast cancer susceptibility; however, the published results remain controversial. Thus, we conducted a meta-analysis to synthetically evaluate the association of this polymorphism with breast cancer risk. A computerized literature search was systematically carried out in PubMed, EMBASE, ScienceDirect, China National Knowledge Infrastructure and Wanfang Databases to identify the published case-control studies investigating the relationship between ABCB1 G2677T/A polymorphism and breast cancer risk. The strength of association was assessed using odds ratios (ORs) with 95% confidence intervals (CIs). In total, six studies, including 4,791 cases and 7,042 controls, were included. The results of our quantitative synthesis suggest that there is no significant association between ABCB1 G2677T/A polymorphism and breast cancer risk in overall comparisons under four genetic models (heterozygote: OR = 1.01, 95% CI = 0.92–1.09, P = 0.90; homozygote: OR = 1.01, 95% CI = 0.65–1.55, P = 0.97; recessive model: OR = 1.06, 95% CI = 0.75–1.50, P = 0.76; and dominant model: OR = 0.98, 95% CI = 0.77–1.24, P = 0.85). Similarly, no significant association was observed in the stratification analyses by ethnicity and control source. In conclusion, this meta-analysis suggests that ABCB1 G2677T/A polymorphism is not associated with genetic susceptibility to breast cancer.


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