We studied the functionality of the antioxidant system in laboratory rat cardiomyocytes and blood under psychoemotional stress. It was found that 40-day isolation and violation of diurnal cycle among the animals were accompanied by the intensification of lipid peroxidation process and marked with a reduced activity of antioxidant system enzymes, such as catalase and superoxide dismutase activity. The results suggested that psycho-emotional stress was accompanied by oxidative stress, causing a reduction in the intensity of energy metabolism in cardiomyocytes, which was further strengthened by the fact that the activity of the enzymes involved in ATP synthesis in mitochondria was reduced. Based on the results, we proposed that psychological stress is one of the factors contributing to the development of various cardiac diseases.

We have studied the influences that prolonged isolation and disruption of the circadian cycle have on behavioral activity and hormonal status among animals. It has been showed that such conditions result in development of stress, and decreases occur in the activity of both isoforms of rat hippocampus creatine kinase (CK). We have established kinetic parameters (V max , K m ) of this hippocampal enzyme and the nature of the modifications produced by the protocol. It has been suggested that prolonged isolation and disrupted natural circadian cycle result in lower CK-BB activity in animals due to structural changes in the enzyme and a decrease in ATP and creatine substrates. Lowered enzyme activity is accompanied by an accumulation of Ca 2+ ions in the cell, and this might decrease activity of plasma membrane and mitochondrial Ca-ATPase.

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Aim:The purpose of the study was to compare the morbidity from cancer (expressed as incidence) to the average levels of blood serum inflammatory markers in the population of the Sachkhere region (Georgia).Methods: healthy residents of the Sachkhere district were examined. In the blood serum samples of patients, the cytokines (IL-1α, IL-10, TGF-β, IL-12, IL-17, TNF-α, IL-6) and NOx content, as well as the total antioxidant activity of the non-enzymatic system (TAA) were determined; using light microscopy, buccal micronuclei (MnB) of epithelial cells of the oral mucosa, as indicators of chromosomal disorders, were studied. Results: Study results show, that cancer incidence in Sareki was statistically significantly higher as in Chorvila and Sairkhe (p=0.002; p=0.004); in Sareki inhabitant's blood serum levels of the IL-6, NO are increased (p=0.004, p=0.05), and IL-17, TGFβ, and IL-10 levels are decreased (p=0.010, p=0.001, p=0.033) in comparison to data in Chorvila; in Chorvila inhabitants' indicators of TAA of blood serum and MnB of epithelium cell levels were lower (p=0.001,p=0.045) then in Sairkhe and Sareki. Conclusion: The existence of statistically reliable associations between the levels of cancer incidence in the populations of the surveyed villages and the indicators of immune and oxidative status in their virtually healthy subpopulations, with a high degree of persuasiveness, allows us to assume a close causal link between them. Clarifying the reasons for the identified patterns and their significance requires more detailed studies.

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