Tissue-engineered skin preserving the potential of epithelial cells to differentiate into hair after grafting.

Authors: Larouche, DanielleCuffley, KristinePaquet, ClaudieGermain, Lucie
Abstract: The aim of this study was to evaluate whether tissue-engineered skin produced in vitro was able to sustain growth of hair follicles in vitro and after grafting. Different tissues were designed. Dissociated newborn mouse keratinocytes or newborn mouse hair buds (HBs) were added onto dermal constructs consisting of a tissueengineered cell-derived matrix elaborated from either newborn mouse or adult human fibroblasts cultured with ascorbic acid. After 7–21 days of maturation at the air–liquid interface, no hair was noticed in vitro. Epidermal differentiation was observed in all tissue-engineered skin. However, human fibroblast-derived tissue-engineered dermis (hD) promoted a thicker epidermis than mouse fibroblast-derived tissue-engineered dermis (mD). In association with mD, HBs developed epithelial cyst-like inclusions presenting outer root sheath-like attributes. In contrast, epidermoid cyst-like inclusions lined by a stratified squamous epithelium were present in tissues composed of HBs and hD. After grafting, pilo-sebaceous units formed and hair grew in skin elaborated from HBs cultured 10–26 days submerged in culture medium in association with mD. However, the number of normal hair follicles decreased with longer culture time. This hair-forming capacity after grafting was not observed in tissues composed of hD overlaid with HBs. These results demonstrate that epithelial stem cells can be kept in vitro in a permissive tissue-engineered dermal environment without losing their potential to induce hair growth after grafting.
Document Type: Article de recherche
Issue Date: 9 January 2018
Open Access Date: Restricted access
Document version: VoR
Permalink: http://hdl.handle.net/20.500.11794/16832
This document was published in: Tissue engineering : Part A, Vol. 17 (5-6), 585-876 (2011)
https://doi.org/10.1089/ten.TEA.2010.0403
liebertonline.com
Alternative version: 10.1089/ten.TEA.2010.0403
20973750
Collection:Articles publiés dans des revues avec comité de lecture

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