The purpose of the work was to study the state of the components of the prooxidant-antioxidant system and indicators of protein metabolism in animals after a long period after exposure to weak electromagnetic fields. Materials and methods. The experiment was carried out on three-month-old white outbred rats. The animals were exposed to low-intensity electromagnetic radiation in the centimeter range for 2 months, 4 hours daily. The study of biochemical parameters of blood serum was carried out 3 months after the end of the experimental exposure. When conducting the research, an emitter in the form of a rectangular horn with a base area of 875 cm was used. Energy radiation was expressed in the power flow density in the area where the experimental animals were located. In the comparison group (n=10), animals were placed in a similar chamber every day, but were not exposed to electromagnetic radiation. Research was conducted in the first half of the day, taking into account circadian rhythms. The analysis of biochemical parameters of blood serum was carried out 3 months after the end of exposure, that is, for rats aged 8 months. Results and discussion. It was revealed that in animals exposed to weak electromagnetic radiation, after a long period after the cancellation of the action, there is an imbalance in the prooxidant-antioxidant system; activation of the non-enzymatic link of antioxidant protection is observed – an increase in the level of s-nitrosothiols against the background of a decrease in the level of lipid peroxidation, which, in addition to a destructive effect on the cell membrane, is a necessary element in maintaining the system of renewal of functionally important component of the lipid layer of cell membranes. The experimentally established dysproteinemia (decrease in the α1 fraction and increase in the α2 fraction of globulins) in animals of the main group may indicate a specific change in the enzymatic spectrum of the synthesis of these proteins in the liver. The activation of antioxidant defense components that we discovered is probably a protective measure aimed at maintaining homeostasis after prolonged exposure to electromagnetic radiation. Conclusion. A decrease in the level of final products of protein metabolism was revealed: creatinine and urea, which suggests a decrease in the rate of protein catabolism. It is concluded that in animals, after a long period after exposure to weak electromagnetic fields of the centimeter range, the level of lipid peroxidation is reduced, specific changes in the indicators of protein metabolism are noted, indicating a decrease in the level of their catabolism. It is suggested that this may be related to a decrease in total muscle mass
Keywords: low-intensity electromagnetic radiation, rats, blood serum
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