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Related Experiment Videos

Optimization and characterization of an engineered human skin equivalent.

Annie F Black1, Charbel Bouez, Eric Perrier

  • 1Banque de Tissus et Cellules HCL, Laboratoire des Substituts Cutanés CNRS UPR-412, Hôpital Edouard Herriot, Lyon, France.

Tissue Engineering
|July 7, 2005
PubMed
Summary

Reducing serum in skin equivalent (SE) models enhances epidermal differentiation and maintains tissue structure and function. This optimized SE model is suitable for pharmacotoxicological testing.

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Area of Science:

  • Tissue engineering
  • Dermatology
  • Biomaterials

Background:

  • Skin equivalents (SEs) are crucial for research, requiring proper organization and function.
  • Mesenchymal-epithelial interactions, mediated by extracellular matrix (ECM) and cell-cell contact, influence tissue development.

Purpose of the Study:

  • To optimize a coculture model of skin equivalents for pharmacotoxicological trials.
  • To investigate the effects of progressive serum reduction on epidermal differentiation, dermal quality, dermal-epidermal junctions, and ECM protein expression.

Main Methods:

  • A coculture model using fibroblasts and keratinocytes on a collagen, glycosaminoglycans, and chitosan substrate was developed.
  • Serum content was progressively reduced (10% to 1% and 0%) at the air-liquid interface in experimental groups compared to a 10% serum control group.

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Main Results:

  • Serum deprivation at the air-liquid interface significantly improved keratinocyte terminal differentiation.
  • The absence of serum maintained epidermal and dermal ultrastructure, key ECM components (collagens I, III, V, fibronectin, elastin, fibrillin 1), and the dermal-epidermal junction (laminin, collagen IV, alpha6 integrin).

Conclusions:

  • Optimized serum reduction in SEs enhances differentiation while preserving tissue integrity and function.
  • This refined SE model possesses the necessary morphological and functional characteristics for effective use in pharmacotoxicological applications.