only problem that I see with this is using mouse models for hair growth and testing a substance on them instead of human trialists.
NO ANIMAL has an immuno component to their balding like we do (that we know of). There is androgenic balding in the animal world (mice, rodents, apes) but their immune systems do not attack their follicles. This is why things like minoxidil grow ALOT of hair on balding mice, but just a little back on us. THe immune system would still keep attacking the follicles even with a treatment that got stem cells to act a little faster. The immune system would still be trying to destroy the microcapillaries that feed the follicle, hardening the skin (and collagen) around the follicle, causing streamers of scar tissue to form under the follicle, pushing it upwards.
Boru, my idea on how to fight baldness is when if first starts....get on propecia, get on a good androgen receptor blocker or topical DHT inhitor also. You want the follicle's androgen receptors to transcript castration levels of DHT. Then to use a superoxide dismutase product like Prox-N, tricomin, folligen, american crew to counteract the superoxide attack. Good nutrition, soy isoflavone genistein (to make less androgen receptors and vitamin bsix for the same reason). Id also use nizoral a couple of times a week.
To get hair back is much more complicated though. Proboably not possible to get much back to be honest. Follicle is just to scarred/altered by immuno-attack and shrunk.