I have contacted Dr. Takashi Tsuji, because I was interested in how far they are. Re-read their publications and to me it seems they are the closest to a possible cure.
Unfortunately there is somewhat of a language barrier. Wish I could speak Japanese to gain knowledge of this talented, intelligent yet humble person.
Anyway he mentioned the problems at the moment are the expansion of the epithelial bulge stem cells and DPC. He said the critical issue revolves around expansion of the epithelial bulge stem cells though. When they overcome the current hurdles they will go with a pre-clinical study to check for safety before following with human clinical trials.
He did say that he is fairly confident that their method will translate perfectly well on humans just like in the rodent model.
Dr. Takashi Tsuji;
Maybe our hero one day.