Abstract
Mammalian epidermis consists of three self-renewing compartments: the hair follicle, the sebaceous gland, and the interfollicuLar epidermis. We generated knock-in alleles of murine Lgr6, a close relative of the Lgr5 stem cell gene. Lgr6 was expressed in the earliest embryonic hair placodes. In adult hair follicles, Lgr6+ cells resided in a previously uncharacterized region directly above the follicle bulge. They expressed none of the known bulge stem cell markers. Prenatal Lgr6+ cells established the hair follicle, sebaceous gland, and interfollicuLar epidermis. Postnatally, Lgr6+ cells generated sebaceous gland and interfollicular epidermis, whereas contribution to hair lineages gradually diminished with age. Adult Lgr6+ cells executed long-term wound repair, including the formation of new hair follicles. We conclude that Lgr6 marks the most primitive epidermal stem cell.
| Original language | English |
|---|---|
| Pages (from-to) | 1385-1389 |
| Number of pages | 5 |
| Journal | Science |
| Volume | 327 |
| Issue number | 5971 |
| DOIs | |
| Publication status | Published - 12 Mar 2010 |
| Externally published | Yes |
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