Genetic factors, especially those related to immune system functioning, have been intensively studied to determine their role in the development of recurrent aphthous stomatitis (RAS). The aim of the present study was to analyze gene variability in interleukin (IL)2, IL4 (and its receptor α, IL4Rα), IL10, and IL13, which were selected based on literature review and/or their functional relevance, in Czech patients with RAS and in healthy controls. In total, 252 subjects (178 controls and 74 patients with RAS) were enrolled in this case-control study, and their detailed anamnestic, clinical, and laboratory data were obtained. Nine polymorphisms in the genes encoding interleukins were determined using PCR techniques. There were no significant differences in allele or genotype frequencies of the IL2, IL4, IL4Rα, IL10, and IL13 polymorphisms rs2069762/rs2069763, rs2243250/rs79071878, rs1801275, rs1800896, and rs1800925, respectively, between controls and patients with RAS. The minority alleles rs1800871 and rs1800872, which encode variants of IL10, were associated with a statistically significantly higher risk of RAS, as confirmed by the results of genotype and haplotype analyses. We suggest that variability in the IL10 gene may play an important role in the development of RAS in the Czech population.

Clinic of Stomatology Institution Shared with St Anne's Faculty Hospital Faculty of Medicine Masaryk University Brno Czech Republic

Clinic of Stomatology Institution Shared with St Anne's Faculty Hospital Faculty of Medicine Masaryk University Brno Czech Republic Department of Pathophysiology Faculty of Medicine Masaryk University Brno Czech Republic

Department of Clinical Immunology and Allergology Institution Shared with St Anne's Faculty Hospital Faculty of Medicine Masaryk University Brno Czech Republic

Department of Immunology and Microbiology General University Hospital and 1st Faculty of Medicine Charles University Prague Czech Republic

Institute of Biostatistics and Analyses Masaryk University Brno Czech Republic

Institute of Clinical and Experimental Dental Medicine General University Hospital and 1st Faculty of Medicine Charles University Prague Czech Republic

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$a Borilova Linhartova, Petra $u Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic. Department of Pathophysiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.

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$a Recurrent aphthous stomatitis and gene variability in selected interleukins: a case-control study / $c P. Borilova Linhartova, J. Janos, S. Slezakova, J. Bartova, J. Petanova, P. Kuklinek, A. Fassmann, L. Dusek, L. Izakovicova Holla,

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$a Genetic factors, especially those related to immune system functioning, have been intensively studied to determine their role in the development of recurrent aphthous stomatitis (RAS). The aim of the present study was to analyze gene variability in interleukin (IL)2, IL4 (and its receptor α, IL4Rα), IL10, and IL13, which were selected based on literature review and/or their functional relevance, in Czech patients with RAS and in healthy controls. In total, 252 subjects (178 controls and 74 patients with RAS) were enrolled in this case-control study, and their detailed anamnestic, clinical, and laboratory data were obtained. Nine polymorphisms in the genes encoding interleukins were determined using PCR techniques. There were no significant differences in allele or genotype frequencies of the IL2, IL4, IL4Rα, IL10, and IL13 polymorphisms rs2069762/rs2069763, rs2243250/rs79071878, rs1801275, rs1800896, and rs1800925, respectively, between controls and patients with RAS. The minority alleles rs1800871 and rs1800872, which encode variants of IL10, were associated with a statistically significantly higher risk of RAS, as confirmed by the results of genotype and haplotype analyses. We suggest that variability in the IL10 gene may play an important role in the development of RAS in the Czech population.

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$a Janos, Julius $u Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Brno, Czech Republic.

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