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Organotypic keratinocyte cocultures in defined medium with regular epidermal morphogenesis and differentiation
H J Stark1, M Baur, D Breitkreutz
1Division of Differentiation and Carcinogenesis, German Cancer Research Center, Heidelberg, Germany.
The Journal of Investigative Dermatology
|May 8, 1999
Summary
Defined media support epidermal morphogenesis in organotypic skin cultures, offering a serum-free alternative for research and wound healing applications. These skin models enable robust in vitro studies of skin physiology and toxicology.
Area of Science:
- Tissue engineering
- Dermatology
- In vitro models
Background:
- Skin equivalents are valuable for research and wound treatment.
- Defined media are preferred to avoid serum interference.
- Organotypic cocultures require optimized media for epidermal development.
Purpose of the Study:
- To evaluate a defined medium for epidermal morphogenesis in organotypic skin cocultures.
- To compare the performance of defined medium with serum-containing medium.
- To assess the suitability of defined skin models for mechanistic studies and toxicologic testing.
Main Methods:
- Organotypic cocultures of keratinocytes and fibroblasts in collagen lattices.
- Culture in supplemented keratinocyte defined medium versus serum-containing medium (Ham's F12/DMEM).
- Analysis of epidermal phenotype using immunofluorescence and electron microscopy.
Main Results:
- Defined medium supported epidermal morphogenesis comparable to serum-containing medium.
- Both media resulted in orthokeratinized epithelia with similar kinetics.
- Keratinocyte proliferation was similar, while fibroblast proliferation was reduced in defined medium.
- Ultrastructural differentiation and basement membrane formation were similar; impaired lipid metabolism noted in defined medium.
Conclusions:
- Defined organotypic skin cocultures are suitable for in vitro skin models.
- These models can be used to study tissue homeostasis and for pharmacotoxicologic testing.
- Defined media offer a controlled environment for skin equivalent development.