THE ROLE OF LIPID PEROXIDATION PROCESSES AND ANTIOXIDANT SYSTEM IN MYOCARIUM IN PATHOGENESIS OF FORMATION OF ADRENALINE MYOCARDIAL INJURY
Introduction. Cardiovascular pathology remains an actual problem of the present, as one of the main causes of mortality and disability of people of working age. In particular, over the past decades, particular attention has been paid to one of the important molecular mechanisms of cell damage that involves lipid peroxidation and antioxidant system during adrenal myocardium injury (AMI).
The aim of the study – to elucidate the changes in the markers of lipid peroxidation and antioxidant system in the myocardium in the dynamics of adrenal myocardium injury.
Research Methods. Experiments were conducted on 45 white male rats, which were divided into five groups (9 animals in each). Group 1 – control, groups 2, 3, 4, 5 – groups of animals with AMI, respectively, in the 1-st, 7-th, 10-th and 17-th days of the experiment. The content of diene conjugates, malonic dialdehyde, superoxide dismutase, catalase, ceruloplasmin were determined.
Results and Discussion. The results of biochemical studies revealed that the growth of myocardial contents of diene conjugates was observed in the 1-st, 7-th, 10-th and 17-th days of the formation of adrenal damage of the myocardium. Determination of another indicator of lipid peroxidation – malondialdehyde in the myocardium showed a similar trend of disturbances. It was established that at day 1 the activity of superoxide dismutase increases, does not change for the 7-th day, and then decreases by the 10-th and 17-th days. Similar changes are observed with the activity of catalase and ceruloplasmin. Thus, the study of the parameters of the prooxidant antioxidant system in the myocardium showed a constant accumulation of products of lipoperoxidation against the background of exhaustion of both enzymatic and non-fermentative parts of the antioxidant system in the myocardium, indicating an imbalance between the lipid peroxidation and the antioxidant system.
Conclusions. Determination of the markers of free radical oxidation – diene conjugates and malonic dialdehyde and antioxidant system – superoxide dismutase, catalase, ceruloplasmin in the myocardium showed a gradual stimulation of lipid peroxidation processes and compensatory growth of the activity of the enzymes under study, followed by depression of antioxidant defense, especially on the 10 and 17 days of adrenal myocardium injury formation.
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