Polymorphism of fucosyltransferase 3 gene is associated with inflammatory bowel disease: a systematic review

BACKGROUND: Inflammatory bowel disease (IBD) is a condition with an unclear genetic basis. Fucosyltransferase 3 (FUT3) could potentially be linked to IBD susceptibility. OBJECTIVE: To investigate the association between FUT3 gene polymorphisms and IBD. METHODS: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 checklist and Population, Intervention, Comparison, Outcomes, and Study (PICOS) guidelines, case-control studies published until April 30, 2020 was searched. Two independent reviewers conducted screening, data extraction, and quality assessment using the Newcastle-Ottawa Scale. Meta-analysis, sensitivity analysis, and Egger tests were performed using RevMan and Stata12.0. RESULTS: The review included 5 articles and 12 case-control studies involving 1712 IBD patients and 1903 controls. The meta-analysis revealed the following combined odds ratios [95% confidence intervals]: rs3745635 genotype (GA+AA vs GG) 0.84 (0.72–0.97), (GG+GA vs AA) 1.93 (1.23–3.05), (GG vs AA) 2.38 (1.52–3.74), (A vs G) 0.84 (0.73–0.96); rs3894326 genotype (TA+AA vs TT) 1.03 (0.87–1.23), (TT+TA vs AA) 1.19 (0.56–2.51), (TT vs AA) 1.19 (0.56–2.51), (A vs T) 1.02 (0.86–1.20); rs28362459 genotype (TG+GG vs TT) 0.98 (0.85–1.12), (TT+TG vs GG) 1.20 (0.90–1.61), (TT vs GG) 1.21 (0.90–1.62), (G vs T) 0.96 (0.86–1.07). Sensitivity analysis indicated the stability of the results, and Egger analysis showed no significant publication bias. CONCLUSIONS: The rs3745635 gene polymorphism may be associated with IBD susceptibility, whereas the rs3894326 and rs28362459 gene polymorphisms may not be associated with IBD.