title: Assessment of serum paraoxonase and arylesterase activity in patients with endometrial cancer.
abstract: OBJECTIVE
  Serum paraoxonase (PON 1) is one of the most important enzymatic antioxidants that hydrolyzes lipid peroxidation, an indicator of carcinogenic activity. The aim of this study was to compare the serum levels of paraoxonase and arylesterase activity in patients with endometrial cancer to those of healthy controls.
  
  
  METHODS
  Serum paraoxonase and arylesterase activities, total free sulphydryl (-SH) groups and lipid hydroperoxide (LOOH) levels were measured in patients with endometrial cancer (n = 20) and controls (n = 23).
  
  
  RESULTS
  Serum paraoxonase, arylesterase activities and total -SH group levels were significantly lower in patients compared to controls (p < 0.05, p < 0.05 and p < 0.001; respectively), while LOOH levels were significantly higher (p < 0.001). Among patients, serum paraoxonase and arylesterase activities were inversely correlated with LOOH levels (r = -0.680, p < 0.05; r = -0.708, p < 0.001; respectively), while these were positively correlated with the total -SH group (r = 0.526, p < 0.05; r = 0.508, p < 0.05; respectively).
  
  
  CONCLUSIONS
  Reduced serum PON 1 activity might contribute to an impaired antioxidant defense system which plays a critical role in carcinogenesis in patients with endometrial cancer.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Afyonkarahisar Kocatepe University, Afyonkarahisar, Turkey. dagistantolgaarioz@yahoo.com
authors.forename: D T
authors.initials: DT
authors.lastname: Arioz
authors.forename: H
authors.initials: H
authors.lastname: Camuzcuoglu
authors.forename: H
authors.initials: H
authors.lastname: Toy
authors.forename: S
authors.initials: S
authors.lastname: Kurt
authors.forename: H
authors.initials: H
authors.lastname: Celik
authors.forename: O
authors.initials: O
authors.lastname: Erel
mesh_terms: D000328:Adult; D043303:Aryldialkylphosphatase / Q000097:blood*; D002265:Carboxylic Ester Hydrolases / Q000097:blood*; D016022:Case-Control Studies; D016889:Endometrial Neoplasms / Q000097:blood*; D005260:Female; D006801:Humans; D015227:Lipid Peroxidation; D008875:Middle Aged; D013438:Sulfhydryl Compounds / Q000097:blood
chemical_list: D013438:Sulfhydryl Compounds; D002265:Carboxylic Ester Hydrolases; C019734:arylesterase; D043303:Aryldialkylphosphatase