Association between NCF4 rs4821544T/C polymorphism and inflammatory bowel disease risk in Caucasian: a meta-analysis.

OBJECTIVE:Published studies on the association between NCF4 rs4821544T/C polymorphism and inflammatory bowel disease (IBD) risk in Caucasian have yielded conflicting results. The present study aimed to provide more reliable conclusions by conducting a meta-analysis. METHODS:All eligible studies were extracted from Wiley Online Library, Chinese National Knowledge Infrastructure and PubMed databases. Odds ratios (ORs) with 95 % confidence intervals (CIs) were used to assess the associations between rs4821544T/C polymorphism and IBD risk in Caucasian. RESULTS:A total of 13 case-control studies comprising 7441 Crohn's disease (CD) patients, 2565 ulcerative colitis (UC) patients and 8315 controls were included in this meta-analysis. Significant associations were found between CD and the rs4821544T/C polymorphism in three genetic models (C vs T: OR = 1.11, 95 % CI: 1.06, 1.16, P = 0.000; CC vs TT: OR = 1.31, 95 % CI: 1.18, 1.45, P = 0.000; CC/TC vs TT: OR = 1.07, 95 % CI: 1.01, 1.13, P = 0.014; CC vs TC/TT:OR = 1.28, 95 % CI: 1.16, 1.42, P = 0.000). However, significant associations were not found in UC under any genetic models (C vs T: OR = 1.04, 95 % CI: 0.97, 1.11, P = 0.264; CC vs TT: OR = 1.10, 95 % CI: 0.93, 1.30, P = 0.284; TC vs TT: OR = 1.04, 95 % CI: 0.95, 1.13, P = 0.429; CC/TC vs TT: OR = 1.04, 95 % CI: 0.95, 1.13, P = 0.390; CC vs TC/TT:OR = 1.07, 95 % CI: 0.91, 1.26, P = 0.409). CONCLUSION:This meta-analysis suggested that the rs4821544T/C polymorphism was associated with CD, but not UC in Caucasian.

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