Diabetes increases interleukin-17 levels in periapical, hepatic, and renal tissues in rats

Publication date: November 2017
Source:Archives of Oral Biology, Volume 83
Author(s): Mariane Maffei Azuma, João Eduardo Gomes-Filho, Annelise Katrine Carrara Prieto, Renata Oliveira Samuel, Valéria Marçal Felix de Lima, Dóris Hissako Sumida, Edilson Ervolino, Luciano Tavares Angelo Cintra
ObjectivesThis study aimed to evaluate the association between endodontic infection and diabetes on interleukin-17 levels in periapical, hepatic, and renal tissues of rats.DesignForty male rats were divided into groups: normoglycemic rats (N), normoglycemic rats with apical periodontitis (N-AP), rats with experimental diabetes (ED), and rats with experimental diabetes and apical periodontitis (ED-AP). Diabetes was induced by intravenous streptozotocin injection, and blood sugar levels were monitored to confirm disease development. Apical periodontitis (AP) was induced by pulp exposure to the oral environment during 30days. After 30days, hepatic and renal tissues were obtained, and IL-17 levels were quantified by ELISA. The right hemi-jaw was used to quantify IL-17 levels by immunohistochemistry. The values obtained in parametric tests were tabulated and analyzed statistically by analysis of variance (ANOVA) and Tukey tests, and the values obtained for scores were statistically analyzed by using the Kruskal-Wallis and Dun tests. The level of significance was set at 5%.ResultsED and ED-AP groups expressed significantly higher IL-17 levels in both hepatic and renal tissues (p<0.05), compared to N and N-AP groups. Apical periodontitis (AP) in ED-AP group was significantly more severe than that in N-AP group (p<0.05). Furthermore, there was a significantly larger increase in the IL-17 levels in ED-AP group compared to N group (p<0.05).ConclusionOur results indicate that diabetes increases IL-17 levels in hepatic and renal tissues and also enhances IL-17 production in apical periodontitis area of rats.



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