Level of middle molecular peptides in the articular cartilage of rats under experimental osteoarthritis and administration of probiotic composition

Abstract

The question regarding clarification the mechanisms that link changes in the musculoskeletal system with changes in the microbiome, in recent few years has become particularly relevant. The investigation of the biological effect of probiotics on cartilage metabolism under osteoarthritis (OA) opens the perspectives for their use in complex therapy and prevention of joint pathology. The aim of the research was to analyze the quantitative and qualitative composition of the peptide component of the middle-mass molecules (MMM) of different fractions in the articular cartilage of rats with experimental OA under the introduction of multiprobiotic (PB) composition. The experiments were conducted on white male non-linear rats weighing 180-200 g. Experimental osteoarthritis in rats was induced by a single injection of sodium monoiodacetate (MIA; Sigma, USA) in the knee patellar ligament. The animals of therapeutic group received oral administration of live probiotic composition Multiprobiotic Simbiter® acidophilic concentrated ("O.D. Prolisok", Ukraine) at a dose of 140 mg/kg daily for 14 days. Euthanasia of animals was performed on the 30th day of the experiment. The level of MMM was assessed spectrophotometrically. Fractionation at the peptide level was performed using the method of chromatography, which is separated by size on Sephadex G 15 column. Our findings showed an increase in the MMM content of all studied fractions in cartilage tissue of rats with experimental OA and changes in the qualitative and quantitative composition of their the peptide component, that could indicate the development of endogenous intoxication, as a result of impaired cartilage metabolism, inflammation and destructive processes in the knee joint during the pathology. Administration to animals with MIA-induced OA PB composition had a favorable effect on the studied parameters, which was expressed in a decrease of MMM content and restored redistribution of the peptide pool of cartilage tissue. The obtained results provide grounds for further research aimed at studying the biological effect of PB on cartilage metabolism, which may contribute to the development of new strategies for the treatment and prevention of joint diseases.