Little offtopic,
While I agree that the mechanism for minoxidil is not understood completely, here is another piece of puzzle.
HaCaT cells were treated with minoxidil.Ribonucleic acid (RNA) isolations were carried out from both non-treated and treated cell groups using a TRI reagent (an RNA, DNA, and protein isolation reagent). Gene expressions of 5α-R2 as study material and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) as the control were determined by realtime-quantitative polymerase chain reaction (RT-qPCR) analysis. Results were represented as 5α-R2 / GAPDH fold change.
Minoxidil treatment resulted in a0.22 fold change for 5α-R2 (p < 0.0001). This antiandrogenic effect of minoxidil,shown by significant downregulation of 5α-R2 gene expression in HaCaT cells,may be one of its mechanisms of action in alopecia.
So it seems like minoxidil has couple of synergetic mechanisms combating AA.
1) Downregulation of 5α-reductase
2) Increase Ca2+ influx for stem cell differentiation
3) Increased Microcirculation via vasodilation and collateral capillaries?
4) Downregulation of ILK, Akt, and MAPK signaling pathways
Anyways..
Edit:
Thanks
Rolandconil, I haven't seen that study.