title: Assessment of the serum paraoxonase activity and oxidant/antioxidant status in patients with recurrent aphthous stomatitis.
abstract: OBJECTIVE
  Several 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.
  
  
  METHODS
  Thirty-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.
  
  
  RESULTS
  Serum total antioxidant capacity levels, PON1, and arylesterase activities were significantly lower in RAS than controls (P < 0.001), while total oxidant status levels and oxidative 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.
  
  
  CONCLUSIONS
  Our 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.
authors.affiliation: Departments of, Dermatology, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey.
authors.forename: Serap Gunes
authors.initials: SG
authors.lastname: Bilgili
authors.forename: Halil
authors.initials: H
authors.lastname: Ozkol
authors.forename: Zennure
authors.initials: Z
authors.lastname: Takci
authors.forename: Hatice Uce
authors.initials: HU
authors.lastname: Ozkol
authors.forename: Ayse Serap
authors.initials: AS
authors.lastname: Karadag
authors.forename: Mehmet
authors.initials: M
authors.lastname: Aslan
mesh_terms: D000328:Adult; D000975:Antioxidants / Q000378:metabolism; D043303:Aryldialkylphosphatase / Q000097:blood*; D002265:Carboxylic Ester Hydrolases / Q000097:blood; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D004789:Enzyme Activation / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016877:Oxidants / Q000378:metabolism; D018384:Oxidative Stress / Q000502:physiology*; D011446:Prospective Studies; D013281:Stomatitis, Aphthous / Q000097:blood* / Q000201:enzymology*; D055815:Young Adult
chemical_list: D000975:Antioxidants; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D016877:Oxidants; D002265:Carboxylic Ester Hydrolases; C019734:arylesterase; D043303:Aryldialkylphosphatase; C468406:PON1 protein, human