Superoxide dismutase and catalase activity in the blood and liver of rats of different age groups with experimental type 2 diabetes mellitus and skeletal muscle injury

According to 2022 statistics from the Federal State Budgetary Institution National Medical Research Center for Endocrinology, the incidence of type 2 diabetes mellitus in Russia is 92.4% (4.49 million) of patients, and every tenth inhabitant of the Earth already suffers from diabetes mellitus.

Purpose of the study: to analyze the dynamics of superoxide dismutase and catalase activity at the systemic and local levels in rats of different ages when modeling type 2 diabetes followed by mechanical injury to skeletal muscle.

Object and methods. The study was conducted on white outbred healthy male rats 24 months old (120 individuals) and 6 months old (120 individuals). All old and young animals were divided into four subgroups within their group, 30 animals in each. Animals of the first subgroup in groups of old and young rats are intact rats. Animals of the second subgroup of the group in each group had a mechanical dissection in the area of the middle third of the gastrocnemius muscle of the hind limb. Animals of the third and fourth subgroups of each group were subjected to modeling type 2 diabetes mellitus.After the specified time, the animals of the fourth subgroup of both groups were injured in the middle third of the gastrocnemius muscle of the hind limb.

Conclusions. Mechanical injury to the gastrocnemius muscle in combination with type 2 diabetes mellitus is characterized by an intensification of lipid peroxidation and leads to an increase in superoxide dismutase activity in the liver tissue and blood serum of rats, and in young animals the increase in superoxide dismutase activity is more intense than in old ones.

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