[PDF][PDF] SKPs derive from hair follicle precursors and exhibit properties of adult dermal stem cells

J Biernaskie, M Paris, O Morozova, BM Fagan, M Marra… - Cell stem cell, 2009 - cell.com
J Biernaskie, M Paris, O Morozova, BM Fagan, M Marra, L Pevny, FD Miller
Cell stem cell, 2009cell.com
Despite the remarkable regenerative capacity of mammalian skin, an adult dermal stem cell
has not yet been identified. Here, we investigated whether skin-derived precursors (SKPs)
might fulfill such a role. We show that SKPs derive from Sox2+ hair follicle dermal cells and
that these two cell populations are similar with regard to their transcriptome and functional
properties. Both clonal SKPs and endogenous Sox2+ cells induce hair morphogenesis,
differentiate into dermal cell types, and home to a hair follicle niche upon transplantation …
Summary
Despite the remarkable regenerative capacity of mammalian skin, an adult dermal stem cell has not yet been identified. Here, we investigated whether skin-derived precursors (SKPs) might fulfill such a role. We show that SKPs derive from Sox2+ hair follicle dermal cells and that these two cell populations are similar with regard to their transcriptome and functional properties. Both clonal SKPs and endogenous Sox2+ cells induce hair morphogenesis, differentiate into dermal cell types, and home to a hair follicle niche upon transplantation. Moreover, hair follicle-derived SKPs self-renew, maintain their multipotency, and serially reconstitute hair follicles. Finally, grafting experiments show that follicle-associated dermal cells move out of their niche to contribute cells for dermal maintenance and wound-healing. Thus, SKPs derive from Sox2+ follicle-associated dermal precursors and display functional properties predicted of a dermal stem cell, contributing to dermal maintenance, wound-healing, and hair follicle morphogenesis.
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