Genetic aspects of type 2 diabetes mellitus

Type 2 diabetes mellitus (DM2) is a polygenic, multifactorial disease resulting from the interaction of genetic, epigenetic and environmental factors. Given the significant genetic and genomic research in this area, the role of genetic factors in the pathogenesis of DM2 is becoming increasingly clear. The review presents current information in the genetics of DM2, describes the technology of genome wide-associated system (GWAS) based on high-resolution biochips for the simultaneous analysis of thousands of genetic variants in a large number of patients. Due to the use of genome-wide studies, about 100 genes and more than 700 polymorphisms associated with T2DM have been described. The review provides a description of the most common genes and their polymorphisms (TCF7L2, KCNJ11, PPARG) identified by the GWAS method and showing a strong association with T2DM in various populations. In addition, the article notes the role of the ADRB2 gene, whose polymorphisms can also contribute to the development of carbohydrate metabolism disorders. The results of a study on the assessment of the relationship between the rs1042714 ADRB2 polymorphism and indicators of carbohydrate metabolism in different periods of life of overweight and obese women are presented.