Impact of cranioskeletal trauma on the development of endogenous intoxication syndrome in rats of different ages.

OBJECTIVE: Aim: The aim of the study was to determine the impact of cranioskeletal trauma (CST) on the development of endogenous intoxication syndrome in rats of different ages. PATIENTS AND METHODS: Materials and Methods: The experiments involved 147 white male Wistar rats of different age groups. The first experimental group included sexual immature rats aged 100-120 days. The second group includes sexually mature rats aged 6-8 months. The third group included old rats aged 19-23 months. In all experimental groups, CST was modelled under thiopentalonatrium anaesthesia. The control rats were only injected with thiopentalonatrium anaesthesia. The animals were withdrawn from the experiments under anaesthesia after 1, 3, 7, 14, 21 and 28 days by total bleeding from the heart. In blood serum, the content of fractions of molecules of middle mass was determined at a wavelength of 254 and 280 nm (MMM254, MMM280). RESULTS: Results: As a result application of CST in rats of different age groups, an increase in the serum content of MMM254 and MMM280 was observed with a maximum after 14 days and a subsequent decrease by 28 days. At all times of the experiment, the indicators were statistically significantly higher compared to the control groups. The degree of growth of the MMM254 fraction after 1, 7 and 14 days was statistically significantly higher in sexual immature rats, and after 21 and 28 days - in old rats. In old rats after 21 and 28 days of the post-traumatic period, the content and degree of growth of the MMM280 fraction in the blood serum were also significantly higher. CONCLUSION: Conclusions: Modelling of CST in rats of different age groups is accompanied by the development of endogenous intoxication syndrome, which is manifested by the accumulation of MMM254 and MMM280 fractions in the blood serum with a maximum after 14 days of the experiment. The content of the serum fraction of MMM254 in sexual immature rats in the dynamics of experimental CST exceeds other age groups after 1, 7 and 14 days, in old rats the content of the studied MMM fractions is significantly higher after 21-28 days.

ANTIOXIDANT-PROOXIDANT BALANCE OF THE KIDNEYS IN RATS OF DIFFERENT AGES UNDER CONDITIONS OF EXPERIMENTAL CRANIOSKELETAL TRAUMA.

OBJECTIVE: The aim: To determine the peculiarities of the antioxidant-prooxidant balance in the kidney of rats of different ages under conditions of experimental cranioskeletal trauma (CST). PATIENTS AND METHODS: Materials and methods: The experiments involved 147 male white Wistar rats of different age groups. The first experimental group included immature animals aged 100-120 days. The second group included sexually mature animals aged 6-8 months. The third group included old animals aged 19-23 months. In all experimental groups, CST was modelled under thiopental-sodium anaesthesia. The control groups of rats was only injected with thiopental-sodium anaesthesia. The animals were withdrawn from the experiments under anaesthesia after 1, 3, 7, 14, 21 and 28 days by total bleeding from the heart. The content of reagents to thiobarbituric acid and catalase activity was determined in a 10 % kidney homogenate extract, and the antioxidant-prooxidant index (API) was calculated from the ratio of these two parameters. RESULTS: Results: As a result of the application of CST in rats of different age groups, a decrease in the value of renal API was observed with a maximum in immature rats - after 7 days, in mature and old rats - after 14 days. By day 28, the index increased in all experimental groups, but did not reach the control level. The degree of decrease in renal API in old rats under the influence of CCT was significantly higher than in other experimental groups. In immature rats, the impairment of renal API after the application of CST was less, indicating higher reserve capacity of the renal antioxidant defence system in this age group of rats. CONCLUSION: Conclusions: Simulation of CST in rats of different age groups is accompanied by a decrease in the value of API, which by day 28 does not reach the control level in any of the experimental groups. The degree of decrease in renal API value statistically significantly increases with increasing age of rats at all times of the post-traumatic period.