Evaluation of lipids peroxidation products vs. proinflammatory cytokines in hemodialized patients

Background. Patients with end-stage renal failure on chronic hemodialysis often demonstrate accelerated development of atherosclerotic changes and cardiovascular complications. In those patients oxidative stress facilitate's the intensity of lipid peroxidation process, expressed as increased products of lipid peroxidation (malonaldehyde and 4-hydroxyalkenals), Simultaneously, structures modified by peroxidation and glycation of autoantigenic character are formed. Additionally, increase in proinflammatory cytokines is found in their patients on hemodialysis. The aim of the study was to find out the relations between the products of lipid peroxidation and proinflammatory cytokines in patients on hemodialysis. Methods: Plasma concentrations of malonaldehyde and 4-hydroxyalkenals were estimated by spectrophotometric method, glutathione peroxidase as well as concentration of IL-6, its soluble receptor and TNF alpha were measured using ELISA kits. Results: Aldehyde concentrations (malonaldehyde and 4-hydroxyalkenals) were found to be five fold higher in comparison with the controls. Concentration's of proinflammatory cytokines: IL-6, TNF alpha and soluble IL-6 receptor were also higher than in the control group. Patients on hemodialysis showed positive. correlation between concentrations of MDA + 4HNE and IL-6 and TNFa. Conclusion: The correlations found between the products of lipid peroxidation and proinflammatory cytokines suggest causative relation between the intensity of peroxidative processes and stimulation of immunological response in hemodialysed patients, which may increase the risk of atherosclerotic changes in those patients.