Regulation of microRNA with food. Part 2. Food of animal origin

The scientific review considers the mechanisms of microRNA regulation of biological processes in the human body with the help of food products, namely those of animal origin. To write the article, information was searched using Scopus, Web of Science, MEDLINE, PubMed, Google Scholar, Embase, Global Health, The Cochrane Library databases. It is known that micro­RNA molecules of milk retain their biological activity in the digestive tract for a long time, reach the intestinal mucosa and penetrate the internal continuum of the body. It is stated that in breast milk, microRNAs are mainly found in extracellular vesicles, which are signalosomes that mediate the effectiveness of molecular communication between the mother and her child. Breast milk has been shown to contain about 1,400 different miRNAs, most of which are located in exosomes. The authors indicate that the representation of miRNA in breast milk changes during the postpartum period. Scientists believe that large amounts of microRNAs are found both in raw cow’s milk and in commercial dairy foods. Formulas are miRNA-deficient dairy foods. The authors provide data that miR-148a deficiency is associated with the development of pathological processes of the hepatobiliary system such as inflammation, liver fibrosis, carcinogenesis and lipid metabolism disorders. It has been shown that meat products contain large amounts of various miRNAs, which can retain their functional activity even after heat treatment. So, in a comprehensive review using the latest information search databases, it was found that in the modern scientific li­terature, the authors determine the horizontal transfer of numerous microRNA molecules from animals to the human body. The main food product that restores microRNA deficiency is milk. Breast milk contains mRNA, microRNA and many other active substances. Feeding children with formulas leads to a pronounced deficiency of exogenous miRNAs. The change in the structure of the human transcriptome is due to the consumption of meat products.