Association between CD14 Gene C-260T Polymorphism and Inflammatory Bowel Disease: A Meta-Analysis

Background: The gene encoding CD14 has been proposed as an IBD-susceptibility gene with its polymorphism C-260T being widely evaluated, yet with conflicting results. The aim of this study was to investigate the association between this polymorphism and IBD by conducting a meta-analysis. Methodology/Principal Findings: Seventeen articles met the inclusion criteria, which included a total of 18 case-control studies, including 1900 ulcerative colitis (UC) cases, 2535 Crohn's disease (CD) cases, and 4004 controls. Data were analyzed using STATA software. Overall, association between C-260T polymorphism and increased UC risk was significant in allelic comparison (odds ratio [OR] = 1.21, 95% confidence interval [CI]: 1.02-1.43; P = 0.027), homozygote model (OR = 1.44, 95% CI: 1.03-2.01; P = 0.033), as well as dominant model (OR = 1.36, 95% CI: 1.06-1.75; P = 0.016). However, there was negative association between this polymorphism and CD risk across all genetic models. Subgroup analyses by ethnicity suggested the risk-conferring profiles of -260T allele and -260 TT genotype with UC in Asians, but not in Caucasians. There was a low probability of publication bias. Conclusions/Significance: Expanding previous results of individual studies, our findings demonstrated that CD14 gene C-260T polymorphism might be a promising candidate marker in susceptibility to UC, especially in Asians.