Diabetes mellitus type 2 state may occur; however, ketoacidosis is uncommon. Type 2 diabetes primarily occurs as a result of obesity and lack of exercise. Some people are more genetically at risk than others. Type 2 diabetes makes up about 90% of cases of diabetes, with the other 10% due primarily to diabetes mellitus type 1 and gestational diabetes. In diabetes mellitus type 1 there is a lower total level of insulin to control blood glucose, due to an autoimmune induced loss of insulin-producing beta cells in the pancreas. Diagnosis of diabetes is by blood tests such as fasting plasma glucose, oral glucose tolerance
Epigenetics of diabetes Type 2 small methylation differences at isolated CpG sites have large differences in gene-expression levels On a genome wide scale studies have proven that hypomethylation in genes known to be associated with type 2 diabetes has been associated with an increase in susceptibility for the disease. CpG sites in particular display a small but significant case of hypomethylation consistently.The odds of belonging to the Type 2 Diabetes group increased by 6.1% for every 1% decrease in methylation based on microarray-based assay. These observed methylation differences are capable of producing or indicating real expression differences, which lead to the observed enhanced disease risk.