Unraveling the molecular genetic basis of type 2 diabetes

Type 2 Diabetes (T2D) as a global health challenge is characterized by insulin resistance and impaired glucose regulation. This condition has a significant impact on both human health and the global economy. Insulin plays a crucial role as a peptide hormone in regulating glucose metabolism throughout the body. Insulin resistance (IR) as one of the common implications of type 2 diabetes occurs when the body's response to insulin is disrupted, leading to dysfunction in various molecular pathways within tissues targeted by insulin. Identifying the genetic factors involved in T2D is a crucial focus of diabetes research to better comprehend its mechanisms and complications, for treatment, and prevention. Progress in genetic research during the 1980s allowed researchers to identify genetic markers associated with this hereditary trait. Genome Wide Association Studies (GWAS) have been instrumental in pinpointing genetic loci associated with various complications of diabetes. Over 300 loci have been linked to T2D, accounting for more than 19 % of the risk. The present review manuscript aims to examine the complex interplay between genetic factors and T2D development. We review the current knowledge regarding the genetic basis, examining predisposing genetic variants, epigenetic modifications, and gene-environment interactions implicated in the disease pathogenesis. Understanding the underlying genetic mechanisms of T2D opens new avenues for personalized therapies and preventive strategies.