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Culturing Keratinocytes and Fibroblasts in a Three-Dimensional Mesh Results in Epidermal Differentiation and Formation of a Basal Lamina-Anchoring Zone

By Paul Contard, Ronnda L. Bartel, Lloydstone Jacobs, Jerome S. Perlish, E. Douglas MacDonald, Lionel Handler, Diana Cone and Raul Fleischmajer

Abstract

The purpose of this study was to characterize an in vitro co-culture model in which fibroblasts grown in a three-dimensional nylon mesh were recombined with human keratinocytes. The cultures were kept for 3 and 5 weeks and then processed for electron microscopy. Keratinocytes showed reconstruction of an epidermis consisting of a basal layer with hemidesmosome's, a stratified epithelium with tonofilament's and desmosomes, a granular layer with keratinosomes and keratohyaline granules, and a transitional stratum corneum. Anchoring filaments, lamina densa, anchoring fibrils, bundles of elastin-associated microfibrils (diameters 10 nm) and fine collagen fibrils were formed. Collagen fibrils near the epidermis were much thinner than those in the lower levels.The present study shows that the dermal model containing metabolically active fibroblasts in their natural environment will support epidermal morphogenesis and differentiation including the formation of a basal lamina and anchoring zone

Publisher: The Society for Investigative Dermatology, Inc. Published by Elsevier Inc.
Year: 1993
DOI identifier: 10.1111/1523-1747.ep12349952
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