The type2 diabetes is the most common form of diabetes comprising more than 90% of all diabetics.
The primary events in type 2 are believed to be an initial insensitivity of insulin resulting in peripheral insulin resistance and later on , relative insulin deficiency .
The important point is that major cellular dysfunction that occurs in type2 diabetes is NOT due to Beta cells of pancreas, it is due to the muscle, fat and liver cells and to some extent red blood cells due to glycation. However over a period of YEARS beta cell dysfunction can occur with type2 diabetes.
So, the beta cell dysfunction is not the primary issue with type2 diabetes. The key cells affected when type2 diabetes initially develop ( due to hyperinsulinemia ), include glycated red blood cells,muscle, fat and liver cells,which are designed toto take glucose out of blood and pull it into cells and change it into energy.
Those cells require insulin to absorb glucose. When these cells fail to respond adequately to circulating insulin,these cells loose their sensitivity to insulin ( insulin resistance ), and blood glucose level rise.
The body responds to this situation by signalling pancreas to produce more insulin, causing insulin level in blood to become too high ( hyperinsulinemia ) . The cells of liver become insulin resistant and respond by making too much blood sugar. Because sugar in blood is not absorbed by the cells, it stays in the blood, causing blood sugar to rise (hyperglycaemia ).
Given the cellular dysfunction of muscle cells,fat cells and liver cells,majority of diabetic drugs are not going to help in reducing blood sugar or reversing the diabetes. As majority of anti diabetic drugs are designed either to make pancreas secrete more insulin or prevent liver from releasing stored glycogen. The drugs do nothing to address the insulin resistance of muscle cells and fat cells or the the inflammatory damage caused by coarse glycated red blood cells.
It was an attempt to understand why many times drug treatment fails in cases of type2 diabetes.