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| Extensive tissue-regenerative capacity of neonatal human keratinocyte stem cells and their progeny |
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| Author(s): Li A, Pouliot N, Redvers R, Kaur P |
| Source: JOURNAL OF CLINICAL INVESTIGATION Volume: 113 Issue: 3 Pages: 390-400 Published: FEB 2004 |
| Times Cited: 60 References: 48 |
| Abstract: Given our recent discovery that it is possible to separate human epidermal stem cells of the skin from their more committed progeny (i.e., transit-amplifying cells and early differentiating cells) using FACS techniques, we sought to determine the comparative tissue regeneration ability of these keratinocyte progenitors. We demonstrate that the ability to regenerate a fully stratified epidermis with appropriate spatial and temporal expression of differentiation markers in a short-term in vitro organotypic culture system is an intrinsic characteristic of both epidermal stem and transit-amplifying cells, although the stem cell fraction is most capable of achieving homeostasis. Early differentiating keratinocytes exhibited limited short-term tissue regeneration under specific experimental conditions in this assay, although significant improvement was obtained by manipulating microenvironmental factors, that is, coculture with minimally passaged dermal cells or exogenous supply of the ECM protein laminin-10/11. Importantly, transplantation of all classes of keratinocyte progenitors into an in vivo setting demonstrated that tissue regeneration can be elicited from stem, transit-amplifying, and early differentiating keratinocytes for up to 10 weeks. These data illustrate that significant proliferative and tissue-regenerative capacity resides not only in keratinocyte stem cells as expected, but also in their more committed progeny, including early differentiating cells. |
| Document Type: Article |
| Language: English |
| Reprint Address: Kaur, P (reprint author), Peter MacCallum Canc Ctr, Epithelial Stem Cell Biol Lab, St Andrews Pl, Melbourne, Vic 3002 Australia |
Addresses:
1. Peter MacCallum Canc Ctr, Epithelial Stem Cell Biol Lab, Melbourne, Vic 3002 Australia |
| Publisher: AMER SOC CLINICAL INVESTIGATION INC, 35 RESEARCH DR, STE 300, ANN ARBOR, MI 48103 USA |
| Subject Category: Medicine, Research & Experimental |
| IDS Number: 770YQ |
| ISSN: 0021-9738 |
| DOI: 10.1172/JCI.200419140 |
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