Impaired glucose tolerance (IGT) means that blood glucose during the oral glucose tolerance test is higher than normal but not high enough for a diagnosis of diabetes.

They survived essentially indefinitely. So they continued to produce insulin without the need of any immunosuppression and they just continued to maintain normal glucose levels in these diabetic mice.

"This is not a cure," Satoskar says, "but it's something that will allow you to maintain normal blood glucose and control your symptoms."