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Δευτέρα 9 Οκτωβρίου 2017

Association between the IRF6 rs2235371 polymorphism and the risk of nonsyndromic cleft lip with or without cleft palate in Chinese Han populations: A meta-analysis

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Publication date: December 2017
Source:Archives of Oral Biology, Volume 84
Author(s): Yinlan Xia, Bo Hu, Jin Chen, Leilei Zheng, Jinlin Song
ObjectiveTo investigate the association between the risk of nonsyndromic cleft lip with or without cleft palate (NSCL/P) and the IRF6 rs2235371 (C>T) polymorphism in Chinese Han populations.DesignPubMed, Web of Science and EMBASE were searched through May 31, 2016, to select eligible studies. Pooled odds ratios (ORs) with 95% confidence intervals (95% CIs) were applied to estimate the risk of NSCL/P associated with the IRF6 rs2235371 polymorphism. Subgroup analyses were conducted according to NSCL/P types (CLO, CPO and CLP) and the geographical location (Northern China and Southern China). Publication bias and sensitivity analyses were performed to assess the reliability of the results.ResultsA total of 1275 NSCL/P cases and 1294 controls from seven eligible case-control studies were included. In the overall analysis, a significant association between the IRF6 rs2235371 polymorphism and the risk of NSCL/P was identified under all genetic models, with the exception of the recessive model (T vs. C: OR=0.68, 95%CI=0.60-0.76, P<0.00001). A subgroup analysis by NSCL/P types indicated that the variant T allele significantly decreased the risk of CLO and CLP but not CPO. A subgroup analysis of the geographical location further showed significantly decreased susceptibility in Northern China under all genetic models, but in Southern China, only the heterozygote and dominant models showed a significantly decreased risk of NSCL/P. Funnel plot analysis and the Egger linear regression method detected no publication bias.ConclusionsThe IRF6 rs2235371 T allele decreased the risk of NSCL/P in Chinese Han populations. However, further studies with large sample sizes should be conducted to confirm this association.



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