[The evaluation of the lipid peroxidation system and antioxidant defense in adolescent boys with exogenously constitutive obesity with using the coefficient of oxidative stress].

Child and adolescent obesity deserves special attention, since, beginning in adolescence, it progresses and leads to the development of complications already in the adult state. One of the leading mechanisms of the pathogenesis of obesity is the activation of oxidative stress reactions, with insufficient activity of antioxidant factors. There is an opinion that integrated indicators are more informative when assessing antioxidant status disorders compared to individual indicators. The state of lipid peroxidation processes was assessed in 42 adolescent boys, comparable in age (13-17 years old), 19 of them were diagnosed with exogenous-constitutional obesity. Spectrophotometric and fluorometric methods were used. In adolescent boys with obesity, there was a decrease in the concentration of primary products of LPO - diene conjugates (1.39 fold, p=0.007), with an increase in the level of secondary ketodienes and conjugated trienes (1.65 fold, p=0.011). In the antioxidant defense system, the differences in this group included reduced levels of α-tocopherol (1.42 fold, p=0.016), retinol (1.51 fold, p=0.003) and superoxide dismutase activity (1.19 fold, p<0.001), in the absence of significant changes in the blood total antioxidant activity and components of glutathione status in adolescent boys with obesity in comparison with control. The use of the total oxidative stress factor in the group of obese patients showed a high intensity of development of oxidative reactions, which confirms the results of the development of antioxidant insufficiency in this group of patients.