title: Plasma paraoxonase, oxidative status level, and their relationship with asthma control test in children with asthma.
abstract: BACKGROUND
  Assessment of asthma with a control test has been suggested as a relevant approach in recent years. However, no biomarker of systemic inflammation has been included in the assessment of asthma control.
  
  
  OBJECTIVE
  To evaluate plasma paraoxonase (PON1), total oxidant status (TOS), and total antioxidant status (TAS) levels in children with asthma according to the disease control, and the performance in the identification of uncontrolled patients.
  
  
  METHODS
  Stable asthmatic children (n=85) and healthy controls (n=55) were recruited for this study. Blood samples were collected for plasma PON1, TOS, and TAS measurements. Any contributing factors that may affect plasma PON1, TAS, and TOS levels were excluded from both groups. The diagnostic potential of these measures was evaluated using receiver operating characteristic (ROC) analysis.
  
  
  RESULTS
  Comparing the asthmatic children with the control group, plasma TAS and TOS levels were significantly higher (TAS; 6.9 ± 2.1, 1.05 ± 0.32, P<0.001, and TOS; 12.5 ± 3.4, 5.5 ± 3.8, P<0.001, respectively) and PON1 level was significantly lower (156.5 ± 55, 298.6 ± 87.6, respectively, P<0.001) in the asthmatic group than controls. In ROC analysis, PON1 presented an AUC 0.679 and TOS presented an AUC 0.645 for the identification of uncontrolled asthma, respectively. Asthma Control Test (ACT) presented an AUC of 0.972 for the identification of uncontrolled asthma.
  
  
  CONCLUSIONS
  PON1 and TOS levels may be systemic markers of uncontrolled asthma in children. Combined use of these two biomarkers with asthma control test may identify patients with uncontrolled asthma in children.
authors.affiliation: Department of Pediatrics, Division of Pediatric Allergy, Bezmialem Vakif University, Istanbul, Turkey. Electronic address: minozkaya@yahoo.com.
authors.forename: O
authors.initials: O
authors.lastname: Emin
authors.affiliation: Department of Pediatrics, Kurtalan National Government Hospital, Kurtalan-Siirt, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Hasan
authors.affiliation: Department of Pediatrics, Bezmialem Vakif University, Istanbul, Turkey.
authors.forename: D M
authors.initials: DM
authors.lastname: Rusen
mesh_terms: D000293:Adolescent; D000975:Antioxidants / Q000378:metabolism; D019540:Area Under Curve; D043303:Aryldialkylphosphatase / Q000097:blood*; D001249:Asthma / Q000097:blood / Q000175:diagnosis*; D015415:Biomarkers / Q000097:blood*; D016022:Case-Control Studies; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D018384:Oxidative Stress / Q000502:physiology; D011446:Prospective Studies; D012372:ROC Curve
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D043303:Aryldialkylphosphatase; C468406:PON1 protein, human
keywords: Asthma control; Biomarker; Children; Oxidant stress; Paraoxonase