Could there be a cure for diabetes?

Depends . Diabetes type 2 is a result of tissues not responding normally to insulin. This Insulin resistance is triggered in part by increased body fat, diet, exercise, age, genetics. The modifiable factors can lead to reversal of resistance, thus a "cure". These patients are sometimes encouraged to continue meds such as metformin to keep the disease away.
No. There is no cure, there are only treatments to manage diabetes. There is unfortunately no magic drug to cure it.

Related Questions

Could a pancreas transplant cure diabetes?

Absolutely. Pancreas transplants replace the lost Insulin and other hormones that should be produced by a normal pancreas and halt the complications of diabetes as well as control blood sugar. Read more...