Diabetes mellitus type 1 According to the current definition, two fasting glucose measurements above 126 mg/dl (7.0 mmol/l) is considered diagnostic for diabetes mellitus. In type 1, pancreatic beta cells in the islets of Langerhans are destroyed, decreasing endogenous insulin production. This distinguishes type 1's origin from type 2. Type 2 diabetes is characterized by insulin resistance, while type 1 diabetes is characterized by insulin deficiency, generally without insulin resistance. Another hallmark of type 1 diabetes is islet autoreactivity, which is generally measured by the presence of autoantibodies directed towards the beta cells. The appearance of diabetes-related autoantibodies has been shown to be able
Epigenetics of diabetes Type 2 the C677t mutation. This is not a spontaneous mutation; it is actually hereditary. While the mutation does not inactivate the gene, it greatly reduces the efficiency, thus impairing the formation of methionine. The lack of this amino acid prevents methylation from occurring, and as said above, hypomethylation leads to increased susceptibility to Type 2 Diabetes. Type 2 diabetes associated sequence polymorphisms have been identified in 30 linkage disequilibrium (LD) blocks across the human genome, but their effects only explain a minor fraction of the observed phenotypic diversity among individuals. Previously, in other studies it has been demonstrated that connections between