Quiescent and Aging Hair Follicle Stem Cells
February 2016
in “
Science
”
TLDR Foxc1 and COL17A1 are crucial for maintaining healthy hair follicles and preventing hair loss.
Two studies explored the characteristics of hair follicle stem cells, which are crucial for hair growth and maintenance. Wang et al. discovered that the Foxc1 transcription factor is activated in hair follicle stem cells, promoting Nfatc1 and BMP signaling to maintain their quiescent state. Matsumura et al. focused on aging hair follicle stem cells and identified type XVII collagen (COL17A1) as essential for preventing hair thinning. They found that DNA damage led to the depletion of COL17A1, causing cell differentiation and the loss of epidermal keratinocytes, which resulted in hair follicle shrinkage and hair loss.