Association Between the Pre-mir-218 Polymorphism and Cancer Risk in the Chinese Population: a Meta-Analysis

Background: Several recent studies have explored associations between pre-mir-218 polymorphism(rs11134527) and cancer risk. However, published data are still inconclusive. To obtain a more precise estimationof the relationship in the Chinese population, we carried out a meta-analysis for the first time. Materials and
Methods: Through retrieval from the PubMed, Medline, Embase, Web of Science databases, China NationalKnowledge Infrastructure and the Chinese BioMedical Literature Database, a total of four studies wereanalyzed with 3,561 cases and 3,628 controls for SNP pre-mir-218 rs11134527. We calculated odds ratios (ORs)and 95% confidence intervals (95%CIs) to explore the strength of associations.
Results: The results showedthat the rs11134527 polymorphism was associated with decreased cancer risk in GG versus AA and GG versusAA+AG models tested ( GG vs AA: OR=0.82, 95%CI: 0.71-0.94; GG vs AA+AG: OR=0.84, 95%CI: 0.74-0.96),and significantly decreased cervical cancer risk was observed in GG versus AA and GG versus AA+AG models(GG vs AA: OR=0.79, 95%CI: 0.66-0.94; GG vs AA+AG: OR=0.80, 95%CI: 0.68-0.94). However, no significantassociation between the rs11134527polymorphism and hepatocellular carcinoma risk was observed in allcomparison models tested (AG vs AA: OR=0.94, 95%CI: 0.79-1.11; GG vs AA: OR=0.88, 95%CI: 0.70-1.10;GG+AG vs AA: OR=0.92, 95%CI: 0.79-1.08; GG vs AA+AG: OR=0.91, 95%CI: 0.75-1.11).
Conclusion: Thefindings suggest that pre-miR-218 rs11134527 polymorphism may have some relation to cancer development inChinese. However, well-designed studies with larger sample size and more detailed data are needed to confirmthese conclusions.