Diabetes mellitus type 2 and primarily a lack of insulin secretion. Other potentially important mechanisms associated with type 2 diabetes and insulin resistance include: increased breakdown of lipids within fat cells, resistance to and lack of incretin, high glucagon levels in the blood, increased retention of salt and water by the kidneys, and inappropriate regulation of metabolism by the central nervous system. However, not all people with insulin resistance develop diabetes, since an impairment of insulin secretion by pancreatic beta cells is also required. The World Health Organization definition of diabetes (both type 1 and type 2) is for a single raised glucose reading
Epigenetics of diabetes Type 2 left behind during both HCNE-driven expression and IRX3 expression. In summary, persons at high risk for Type 2 Diabetes and obesity have a highly methylated 7.7 kb region in the linkage disequilibrium block of the FTO gene. This methylation leads to the deactivation of the HCNE located within it, and decreased IRX3 expression. When IRX3 was knocked out, there was a drop in the number of β-cells that produce insulin and the α-cells that produce glucagon. This sudden drop indicates a direct relationship between the FTO gene, IRX3, and Type 2 diabetes. Epigenetics of diabetes Type 2 In recent years