Interleukin-17A Gene Variability in Patients with Type 1 Diabetes Mellitus and Chronic Periodontitis: Its Correlation with IL-17 Levels and the Occurrence of Periodontopathic Bacteria

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Authors

BOŘILOVÁ LINHARTOVÁ Petra KAŠTOVSKÝ Jakub LUČANOVÁ Světlana BARTOVA Jirina POSKEROVÁ Hana VOKURKA Jan FASSMANN Antonín KAŇKOVÁ Kateřina IZAKOVIČOVÁ HOLLÁ Lydie

Year of publication 2016
Type Article in Periodical
Magazine / Source Mediators of Inflammation
MU Faculty or unit

Faculty of Medicine

Citation
Doi http://dx.doi.org/10.1155/2016/2979846
Field ORL, ophthalmology, stomatology
Keywords Interleukin-17; gene polymorphism; periodonthopatic bacteria; chronic periodontitis; type 1 diabetes mellitus
Description Interleukin-17 contributes to the pathogenesis of type 1 diabetes mellitus (T1DM) and chronic periodontitis (CP). We analyzed IL-17A -197A/G and IL-17F +7488C/T polymorphisms in T1DM and CP and determined their associations with IL-17 production and occurrence of periopathogens. Totally 154 controls, 125 T1DM, and 244 CP patients were genotyped using 5'. nuclease TaqMan (R) assays. Bacterial colonization was investigated by a DNA-microarray kit. Production of IL-17 after in vitro stimulation of mononuclear cells by mitogens and bacteria was examined by the Luminex system. Although no differences in the allele/genotype frequencies between patients with CP and T1DM CP were found, the IL-17A -197 A allele increased the risk of T1DM (P < 5). Levels of HbA1c were significantly elevated in carriers of the A allele in T1DM patients (P < 0.05). Production of IL-17 by mononuclear cells of CP patients (unstimulated/stimulated by Porphyromonas gingivalis) was associated with IL-17A A allele (P < 0.05). IL-17A polymorphism increased the number of Tannerella forsythia and Treponema denticola in patients with CP and T1DM + CP, respectively (P < 0.05). IL-17A gene variability may influence control of T1DM and the "red complex" bacteria occurrence in patients with CP and T1DM + CP. Our findings demonstrated the functional relevance of the IL-17A polymorphism with higher IL-17 secretion in individuals with A allele.
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