Assessment of the Serum Paraoxonase Activity and Oxidant/Antioxidant Status in Patients With Recurrent Aphthous Stomatitis

Abstract

ObjectivesSeveral studies have indicated that recurrent aphthous stomatitis (RAS) is associated with oxidative stress. The aim of this study was to investigate serum paraoxonase (PON) activity and oxidant/antioxidant status in patients with RAS. Design and methodsThirty-one patients with RAS and 31 healthy controls were enrolled. Serum PON1 and arylesterase activities, total antioxidant capacity, total oxidant status, and oxidative stress index were determined. ResultsSerum total antioxidant capacity levels, PON1, and arylesterase activities were significantly lower in RAS than controls (P<0.001), while total oxidant status levels andoxidative stress index were significantly higher (P<0.001). PON1 activity had a significant correlation with high-density lipoprotein cholesterol only (r=0.482, P<0.05),while there were no correlations with other lipids (P>0.05) in patients with RAS. ConclusionsOur results indicate that RAS is associated with decreased PON1 activity and increased oxidative stress that plays a crucial role in the pathogenesis of RAS. Further studies on a larger number of patients are needed to verify these results.