Dr. Bernstein summarizes an article in the Journal of the National Cancer Institute:
Curis, Inc., a drug development company, has published data showing the effectiveness of a proprietary Hedgehog pathway activator to stimulate hair growth in adult mice. The study shows that a topically applied small molecule agonist of the Hedgehog signaling pathway can stimulate hair follicles to pass from the resting stage to the growth stage of the hair cycle. The Hedgehog agonist produces no other noticeable short or long-term changes in the skin of the mice.
This study also demonstrated that the Hedgehog agonist is active in human scalp in vitro as measured by Hedgehog pathway gene expression. The results suggest that topical application of a Hedgehog agonist could be effective in treating hair loss conditions, including male and female pattern genetic hair loss.
Preliminary results were presented at the American Academy of Dermatology (AAD) in February 2005. This work was based on a study in 2001 by Sato et. Al. who showed that the Sonic hedgehog gene is involved in the initiation of hair growth in mice.
Reference: Sato N., Leopold PL, Crystal, RG. Effect of Adenovirus-Mediated Expression of Sonic Hedgehog Gene on Hair Regrowth in Mice With Chemotherapy-Induced Alopecia. Journal of the National Cancer Institute, 2001, Vol. 93, No. 24.
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