title: Lipid peroxidation and protein oxidation are related to the severity of OSAS.
abstract: OBJECTIVE
  Obstructive sleep apnea syndrome (OSAS) is associated with elevated cardiovascular morbidity and mortality. Considering that oxidative stress is involved in endothelial dysfunction and atherosclerosis development, our aim was to examine lipid peroxidation and protein oxidation, two parameters of oxidative status, in a group of subjects with OSAS.
  
  
  METHODS
  We consecutively enrolled 48 patients (36 men and 12 women; mean age 49.7±14.6 yrs) with OSAS, subsequently subdivided according to the apnea/hypopnea index (AHI) value in two subgroups: Low (L= 21 subjects with AHI<30) and High (H= 27 subjects with AHI>30). We examined lipid peroxidation, expressed as TBARS, and protein oxidation, measured as carbonyl groups in plasma samples from fasting venous blood.
  
  
  RESULTS
  We observed that TBARS and carbonyl groups were significantly higher in subjects with AHI > 30 in comparison with the L subgroup and the whole group of OSAS subjects. In addition, we found that these parameters were positively correlated with neck and waist circumference, with the AHI value and with the oxygen desaturation index, and negatively correlated with the mean oxygen saturation.
  
  
  CONCLUSIONS
  Lipid peroxidation and protein oxidation in OSAS patients are significantly correlated with the severity of the disease.
authors.affiliation: Dipartimento Biomedico di Medicina Interna e Specialistica, Palermo University, Palermo, Italy. eugenia.hopps@unipa.it.
authors.forename: E
authors.initials: E
authors.lastname: Hopps
authors.forename: B
authors.initials: B
authors.lastname: Canino
authors.forename: V
authors.initials: V
authors.lastname: Calandrino
authors.forename: M
authors.initials: M
authors.lastname: Montana
authors.forename: R
authors.initials: R
authors.lastname: Lo Presti
authors.forename: G
authors.initials: G
authors.lastname: Caimi
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D015227:Lipid Peroxidation / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000502:physiology*; D012720:Severity of Illness Index; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis* / Q000378:metabolism* / Q000503:physiopathology; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D055105:Waist Circumference / Q000502:physiology
chemical_list: D017392:Thiobarbituric Acid Reactive Substances