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Background  Recent clinical studies have assessed the association of various polymorphisms on the ephreceptor tyrosinekinase-type A2 ( EPHA2 ) with the risk for age-related cataract in populations of different ethnic/racial backgrounds, but inconsistent results have been obtained.    Objective  This meta-analysis aimed to identify if any polymorphism(s) might be commonly present in different ethnic/racial populations in association with the age-related cataract risk.    Methods  The PubMed and Web of Science databases (up to December 1, 2012) were searched for clinical studies on the association of  EPHA2  polymorphisms with the risk for age-related cataract. The polymorphisms that were assessed in all eligible studies were analyzed for their association with the risk for age-related cataract using different models.    Results  Three studies were identified, which were conducted, respectively, on white Americans in the Unites States and on Asians in Indian and China. The polymorphism, rs3754334, was the only one studied in all these three studies and was therefore the focus of this meta-analysis. No publication bias or heterogeneity was found. Our analysis results demonstrated that rs3754334 was associated with the risk of any cataracts in the recessive (OR = 1.202, 95% CI: 1.051–1.375, P = 0.007) and Codominant (OR = 1.194, 95% CI: 1.035–1.378, P = 0.015) models, but its association with cortical or nuclear phenotype of age-related cataract was not evident.    Conclusion  Polymorphism, rs3754334, might be a variant on the  EPHA2  gene that is commonly associated with the risk for age-related cataract in different ethnical and geographical populations.

Association of the Ephreceptor Tyrosinekinase-Type A2 (EPHA2) Gene Polymorphism rs3754334 with Age-Related Cataract Risk: A Meta-Analysis