Abstract:Keratin is known to be a major protein in hair, but the biological function of keratin in hair growth is unknown, which led us to conduct a pilot study to elucidate biological function of keratin in hair growth via cellular interactions with hair forming cells. Here, we show hair growth is stimulated by intradermal injection of keratin into mice, and show that outer root sheath cells undergo transforming growth factor-β2-induced apoptosis, resulting in keratin exposure. Keratin exposure appears to be critical … Show more
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