Profiling oxidative stress markers and cardiovascular complications in chronic kidney disease patients supplemented with vitamin E

Abstract

IntroductionCardiovascular diseases are common complications in chronic kidney disease (CKD). Oxidative stress associated with renal and metabolic dysfunctions is one of the cardiovascular complications (CVC) in haemodialysis patients. The aim of the present study is to analyse the oxidative stress markers in CDK patients supplemented with antioxidants and vitamin E, with monitoring of CVC.Material and methodsThis was a cross-sectional study conducted on 99 subjects. CKD patients received oral supplementation of vitamin E (300 mg/day) for 2 years. Oxidative stress markers, nitric oxide (NO); myeloperoxidase (MPO); oxidized low-density lipoprotein (LDLox); malondialdehyde (MDA) and glutathione were measured before and after the vitamin treatment.ResultsNO (62.62 ±2.80 µmol/l), LDLox (10.55 ±4.62 µmol/l), MDA (6.11 ±2.83 µmol/l) and MPO (53.35 ±3.82 UI/ml) were overconcentrated, while glutathione (62.09 ±4.15 UI/ml) was less concentrated in CKD patients with cardiovascular complications, compared to those without cardiovascular complications (67.08 ±1.90 µmol/l, 31.18 ±5.25 µmol/l, 16 ±6.47 µmol/l, 57.00 ±7.24 UI/ml, 43.09 ±3.33 UI/ml, respectively). After 2 years of vitamin E treatment, the overall cardiovascular complications were not significantly decreased.ConclusionsThese results showed that oral complementation with vitamin E did not affect the occurrence of cardiovascular complications associated with CKD. These findings may pave the way for future innovative strategies for antioxidant supplementation in CKD patients.