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Abstract

Decreased Paraoxonase 1, Arylesterase Enzyme Activity, and Enhanced Oxidative Stress in Patients with Mitral and Aortic Valve Insufficiency by Necat Yilmaz, Nevin Simsek, Ozgur Aydin, Emirhan Yardan, Sakir Aslan, Esin Eren, Aysenur Yegin, Sadik Buyukbas

Background: Oxidative stress is reportedly associated with several cardiovascular diseases. The antioxidant ability of high density lipoprotein (HDL) is, at least in part, attributable to the pleiotropic serum paraoxonase (PON1). The aim of the study was to investigate the body oxidant/antioxidant balance in patients with mitral regurgitation (MR) and aortic regurgitation (AR) to get new points of view for the underlying oxidative mechanisms.
Methods: Oxidative stress index (OSI), total oxidant status (TOS), and total antioxidant status (TAS) were examined in addition to the PON1 and arylesterase (ARE) enzyme activities in fifty-six patients and thirty-seven healthy control subjects.
Results: Serum PON1 and ARE enzyme activities were statistically significantly reduced in heart valve disease (HVD) patients (p = 0.0005 and p < 0.0001, respectively), whereas TOS and OSI levels were found to be significantly higher (p = 0.0021 and p < 0.0001, respectively).
Conclusions: Serum PON1 activity is reduced in patients with HVD, caused by elevated oxidative stress and disturbances of heart valve metabolism. The findings from this novel detailed approach, implicate an inflammatory/ oxidative stress process in the pathogenesis of the valveā€™s presentation associated with the HVD. The strength of the significance in differences encourage us to propose that the role of oxidative stress in HVD pathogenesis is very prominent, and oxidative stress markers are potential ancillary tests to evaluate the state of the disease.

DOI: 10.7754/Clin.Lab.2012.120629