Association of Common Variants in LOX with Keratoconus: A Meta-Analysis

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Association of Common Variants in LOX with Keratoconus: A Meta-Analysis

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Title: Association of Common Variants in LOX with Keratoconus: A Meta-Analysis
Author: Zhang, Jing; Zhang, Lu; Hong, Jiaxu; Wu, Dan; Xu, Jianjiang

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Citation: Zhang, Jing, Lu Zhang, Jiaxu Hong, Dan Wu, and Jianjiang Xu. 2015. “Association of Common Variants in LOX with Keratoconus: A Meta-Analysis.” PLoS ONE 10 (12): e0145815. doi:10.1371/journal.pone.0145815.
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Abstract: Background: Several case-control studies have been performed to examine the association of genetic variants in lysyl oxidase (LOX) with keratoconus. However, the results remained inconclusive and great heterogeneity might exist across populations. Method A comprehensive literature search for studies that published up to June 25, 2015 was performed. Summary odds ratios (OR) and 95% confidence intervals (CI) of each single nucleotide polymorphism (SNP) were estimated with fixed effects model when I2<50% in the test for heterogeneity or random effects model when I2>50%. Publication bias was evaluated using funnel plots and Egger’s test. Results: A total of four studies including 1,467 keratoconus cases and 4,490 controls were involved in this meta-analysis. SNPs rs2956540 and rs10519694 showed significant association with keratoconus, with ORs of 0.71 (95% CI: 0.63–0.80, P = 1.43E-08) and 0.77 (95% CI: 0.61–0.97, P = 0.026), respectively. In contrast, our study lacked sufficient evidences to support the association of rs1800449/rs2288393 with keratoconus across populations. Conclusion: This meta-analysis suggested that two LOX variants, rs2956540 and rs10519694, may affect individual susceptibility to keratoconus, while distinct heterogeneity existed within this locus. Larger-scale and multi-ethnic genetic studies on keratoconus are required to further validate the results.
Published Version: doi:10.1371/journal.pone.0145815
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