LAUSR

AIM To determine if there are significant associations between polymorphisms of the IL-1, IL-6, and IL-10 genes and susceptibility to recurrent aphthous stomatitis (RAS). METHODS The PubMed, Embase, and Web of Science databases were searched for all eligible studies using both medical subheadings and free terms through December 2016. A total of 226 citations were retrieved. Odds ratios were used to quantitatively evaluate the associations of IL-1, IL-6, and IL-10 gene polymorphisms with RAS risk. A meta-analysis was performed, and heterogeneity, sensitivity, and subgroup analyses were carried out to clarify and validate the pooled results. RESULTS A total of 11 studies were identified that met the inclusion criteria and were included in the meta-analysis. This current systematic review indicated that the IL-1b+3954 C/T polymorphism was significantly associated with an elevated risk of RAS onset for all inheritance models, except for the dominant model. For the IL-10-592 C/A polymorphism, protective associations with RAS were found using both the additive and recessive models, while it increased the risk of RAS in the codominant model. In Asian populations, the IL-10-1082 G/A polymorphism was associated with a protective effect for RAS using the allelic, additive, and recessive models. The IL-6-174 G/C polymorphism was not statistically associated with RAS risk. CONCLUSION The IL-1b+3954 C/T polymorphism significantly increases RAS risk. In addition, the IL-10-1082 G/A polymorphism provided protective effects for RAS in the Asian population.