Корекція пробіотиком пародонтального синдрому у тварин за умов ожиріння і хронічного стресу

The aim of this study was to investigate the effect of obesity and chronic stress on periodontal tissues, both separately and in the combined comorbidity of these conditions in rats, and the role of the probiotic Lactobacillus casei in the correction of periodontal syndrome under these conditions. Methods. The development of periodontal syndrome and the effectiveness of the probiotic Lactobacillus casei IMV B-7280, administered to rats from one month of age intragastrically in a volume of 1 mL (5 · 108 CFU) in two-week courses with breaks of 2 weeks, were studied in a model of glutamate-induced obesity and chronic stress - in combination and separately. In periodontal tissues, the total proteolytic and antitryptic activity, free fucose and glycosaminoglycans (GAG) content, catalase activity, thiobarbiturate active products (TBA reagents), and the content of oxidatively modified proteins (OMP) and molecules of average mass (AMM) were determined; in bone tissue, the molar root exposure coefficient was calculated. The anthropometric parameters of the animals and the Selye triad were studied. Results. We have substantiated the development of periodontal syndrome in animals with glutamate-induced obesity against the background of chronic stress, as evidenced by the activation of free radical oxidation of lipids and proteins, depolymerization of fucoproteins and proteoglycans of periodontal connective tissue, which causes exposure of molar roots by almost 65%. The administration of the probiotic Lactobacillus casei in two-week courses with intervals of 2 weeks to obese rats with chronic stress prevented the development of obesity, as evidenced by a significant decrease in visceral fat mass, Li index, and BMI, as well as the severity of stress syndrome, as evidenced by a decrease in ulcer formation, thymus involution, and adrenal hypertrophy. The periodontoprotective effect of Lactobacillus casei under the combined influence of obesity and chronic stress was proved by significant changes in oxidative stress, free fucose, and GAG content and a 1.5-times decrease in the molar root exposure ratio. Conclusions. Periodic administration of Lactobacillus casei to rats treated with sodium glutamate in the neonatal period against the background of chronic stress prevented the development of obesity, the severity of stress syndromeб and damage to periodontal tissues, as evidenced by the prevention of oxidative stress, increased catabolism of extracellular connective tissue proteins and antiresorptive effect.