Salim NEŞELİOĞLU, Murat AKÇAY, Selçuk ÖZTÜRK, Melike POLAT, Muhammet Cihat ÇELİK, Yunus Emre ÖZBEBEK, Mehmet ERDOĞAN, Serdal BAŞTUĞ

Oxidative stress parameters in patients with ascending aortic dilatation

Background/aim: This study aimed to determine plasma thiol, disulphide, and serum ischemia-modified albumin (IMA) levels and ferroxidase activity in patients with ascending aorta dilatation (AAD) in comparison to those without AAD and to evaluate the predictive value of these oxidative stress parameters for AAD. Materials and methods: This study was designed as a cross-sectional study of 184 patients who applied to our cardiology clinic. Our study population consisted of patients with AAD (n = 85) and without AAD (n = 99). A spectrophotometric method was used to determine plasma thiol, disulphide, and serum IMA levels and ferroxidase activity. Results: The native thiol and the total thiol levels were significantly higher in the control group than the AAD group (P < 0.001), whereas the disulphide and IMA levels and the ferroxidase activity were similar between the groups. The native thiol and the total thiol levels were inversely and significantly correlated with ascending aortic diameter (r = –0.38, P < 0.001; r = –0.39, P < 0.001; respectively). The left ventricle mass and the total thiol levels were independent predictors of ascending aortic diameter (β= 0.223, P = 0.02; β= –0.340, P < 0.001; respectively). Conclusion: Among oxidative stress parameters including thiols, disulphide, IMA, and ferroxidase activity, only the lower total thiol levels appear to confer a high risk for AAD development. Along with the proven diagnostic imaging methods, thiol levels may be helpful to diagnose and stratify patients with AAD.

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