title: The association between two polymorphisms in pre-miRNAs and breast cancer risk: a meta-analysis.
abstract: Emerging evidence has shown that miRNAs participate in human carcinogenesis as tumor suppressors or oncogenes. Single nucleotide polymorphism (SNP) which located in the pre-miRNA may affect the processing and then influence the expression of mature miRNA. Previous studies yielded conflicting results as to the association of two common polymorphisms in pre-miRNAs (i.e. hsa-miR-146 rs2910164 and hsa-miR-196a2 rs11614913) with breast cancer. To derive a more precise effect on the association between these polymorphisms and breast cancer risk, we conducted a meta-analysis. Through retrieving PubMed for the period up to May 2010, a total of four studies were identified with 3,007 cases and 3,718 controls for has-miR-146a rs2910164 polymorphism and with 3,287 cases and 4,298 controls for hsa-miR-196a2 rs11614913 polymorphism. We found that individuals carrying CC genotype of has-miR-196a2 rs11614913 polymorphism was associated with an increased breast cancer risk in homozygote comparison (OR = 1.30; 95% CI, 1.01-1.68), and dominant model (OR = 1.11; 95% CI, 1.01-1.23). However, no significant association between has-miR-146a rs2910164 polymorphism and breast cancer risk was observed in all comparison models tested. These findings suggest that has-miR-196a2 rs11614913 polymorphism may play crucial roles in breast cancer development.
authors.affiliation: Laboratory of Molecular Translational Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China.
authors.forename: Lin-Bo
authors.initials: LB
authors.lastname: Gao
authors.forename: Peng
authors.initials: P
authors.lastname: Bai
authors.forename: Xin-Min
authors.initials: XM
authors.lastname: Pan
authors.forename: Jing
authors.initials: J
authors.lastname: Jia
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Li
authors.forename: Wei-Bo
authors.initials: WB
authors.lastname: Liang
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
authors.forename: Lu-Shun
authors.initials: LS
authors.lastname: Zhang
authors.forename: Yong-Gang
authors.initials: YG
authors.lastname: Wei
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D035683:MicroRNAs / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D012306:Risk; D018570:Risk Assessment
chemical_list: C542542:MIRN146 microRNA, human; C542543:MIRN196 microRNA, human; D035683:MicroRNAs