Endothelium-derived markers and antioxidant status in the blood of obstructive sleep apnea males
نویسندگان
چکیده
OBJECTIVE The relationship between obstructive sleep apnea (OSA) and cardiovascular disease is intensively discussed. Endothelial leukocyte adhesion molecule (E-selectin) is one of factors facilitating leukocyte migration to the subendothelial layer which could be considered proatherogenic. The aim of the study was to determine E-selectin levels and total plasma antioxidant status (TAS) in the blood of different stage OSA patients. METHODS Non-smoking, OSA-suspected males, aged 30-63, were selected for the study. An EMBLA polysomnographic system was used to establish the severity of apneic episodes. The results of apnea/hypopnea index (AHI) allowed dividing patients into the following groups: OSA-0 with AHI 0-4.9 (n=14), OSA-1 with AHI 5-15 (n=14), OSA-2 with AHI 16-30 (n=13), OSA-3 with AHI > or =30 (n=13). Complete blood count (CBC), glycemia during oral glucose tolerance test, fasting plasma lipid profile, uric acid, and high sensitivity C-reactive protein (hsCRP) were estimated among routine parameters. We determined plasma concentrations of E-selectin and total antioxidant status. RESULTS We found progressively decreasing concentrations of TAS (P=0.03) and increased concentrations of E-selectin (P=0.0001) from OSA-0 to OSA-3 subjects. No correlation between E-selectin and metabolic parameters was noted. - CONCLUSION In the studied OSA groups, E-selectin appeared an independent proatherogenic factor.
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