From newborn to adult: phenotypic and functional properties of skin equivalent and human skin as a function of donor age.

Abstract excerpt

The skin's most important function is to act as a barrier against fluid loss, microorganism infections, and percutaneous absorption. To fulfill this role, keratinocytes proliferate and differentiate to produce a protective layer: the stratum corneum. Because stem cells are responsible for the production of differentiated progeny and stem cells (K19-expressing cells) are less abundant in skin from older donors,...

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