In the case of organic brain disorders, it can only be a matter of getting the brain to function better rather than of curing the condition. When it comes to problems of disregulation, we would say that there is not a disease to be cured. Where disregulation is the problem, self-regulation may very well be the remedy. But again, the word “cure” would not apply.
If the problem being addressed is one of brain disregulation, then the answer is yes, and that covers a lot of ground. Neurofeedback involves learning by the brain, and if that brings order out of disorder, the brain will continue to use its new capabilities, and thus reinforce them.