Сomparative characteristics of lipid peroxide oxidation activity and antioxidant protection in rat’s liver on the background of experimental ischemic-reperfusion limb syndrome

The organism's reaction to pathogenic impacts such as blood loss and ischemia can appear either on systemic or on ultrastructural level. The tourniquet inflation pressure on the extremity triggers local lipid peroxidation. However, the systemic influence of tourniquet is not completely studied. This experiment was dedicated to study of the changes that occur in the liver on the background of ischemic-reperfusion syndrome of the limb. In our experiment the animals were divided into 5 groups, in which the effect of ischemia-limb reperfusion, blood loss, mechanical injury of the thigh bone and their combination on the concentration of malonic dialdehyde and glutatoin peroxidase activity was studied. Biochemical investigation of the liver has shown that each of these experimental interventions had caused activation of lipid peroxidation in the liver and proper increase of the activity of the antioxidant protection enzyme in the blood. The peculiarities of the reaction were an increase of the first index, which was the highest among all experimental groups – on the background of blood loss combined with the use of a tourniquet; at the same time the critical suppression of antioxidation was noted as well. Besides 2 periods of exhaustion of the wounded organism were established – on the 3rd and 14th day. At the same time, the content of malonic dialdehyde was higher in the group where the imposition of the tourniquet was combined with mechanical trauma, comparatively to isolated mechanical trauma of the thigh, this indicated the role of the tourniquet as a factor complicating the course of posttraumatic period due to ischemic reperfusion syndrome. Understanding the pathogenesis of traumatic disease will allow to find a new way of valuing of the effects of limb decompression, to cope with oxidative stress and more successfully treat multiple organ failure.