Researchers have identified the mechanism in the brain that is key to sensing glucose levels in the blood linking it to both type 1 and type 2 diabetes. It could lead to new treatment and even prevention of diabetes. 'We have discovered that the prolyl endopeptidase enzyme -- located in a part of the hypothalamus known as the ventromedial nucleus -- sets a series of steps in motion that control glucose levels in the blood' said lead author Sabrina Diano a professor at Yale School of Medicine in the US. The ventromedial nucleus contains cells that are glucose sensors. To