When this growth factor, called Fgf9, was overexpressed in a mouse model, there was a two - to three-fold increase in the number of new hair follicles produced. (researchblogging.org)
Researchers have noticed that if you wound a mouse, the animal generates new hair follicles as part of the healing process. (scientificamerican.com)
In cells grown on flat culture dishes, the expression of thousands of genes didn't match up with their normal patterns, explaining why the cells from those dishes had been unable to generate new hair follicles. (sciencemag.org)