RESUMEN
Recurrent Aphthous stomatitis (RAS) is common oral mucosal condition. The pathophysiology of RAS is affected by a variety of variables, including microbial, genetic, immunological and local and systemic diseases. Interleukin IL-1ß, a cytokine that promotes inflammation, has been found in high concentrations in the circulation of RAS. The goal of current investigation was to determine whether RAS is connected with polymorphisms of the IL-1ß 542 T>A gene. A total of 60 RAS patients and 30 controls were included in the study. Biochemical investigations for determining (vitamin D, vitamin B12 and zinc) were done and genotypes of IL-1B gene polymorphisms were determined using polymerase chain reaction (PCR) and sequencing. The mean age of the participants was 30.83 ± 1.466 years (range 16 to 50). There was no significant association of SNP IL-1ß 542T>A polymorphism with RAS diseases compared to controls, in both parameters such as sex (p-value=0.495) and age groups (p-value=0.6253). There was significant difference in the occurrence of both A and T alleles between RAS patients and controls (p-value=0.0058). The mean vitamin D in both genotypes TA and TT differed significantly (p-value=0.007) but in genotype AA there was no significant difference. Significant difference was observed in zinc concentration between patients and controls (p-value=0.0031). The findings of current investigation indicate that there is a specific IL-1ß 542 T>A gene variation that is associated to the pathogenesis of RAS. Allele A was related to the risk of RAS in Erbil city population.