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Generation of a Simplified Three-Dimensional Skin-on-a-chip Model in a Micromachined Microfluidic Platform
Published on: May 17, 2021
Cosmetic efficacy claims in vitro using a three-dimensional human skin model
K Schlotmann1, M Kaeten, A F Black
1Henkel KGaA, Department of Skin Biochemistry, 40225 Düsseldorf, Germany.
International Journal of Cosmetic Science
|May 24, 2008
Summary
A novel 3D engineered skin model effectively tests cosmetic ingredients and formulations. This advanced skin equivalent mimics human skin, enabling accurate efficacy testing for products targeting dry and aged skin.
Area of Science:
- Biotechnology
- Tissue Engineering
- Dermatology
Background:
- Traditional cell cultures lack the complexity of human skin.
- A need exists for advanced models to accurately assess cosmetic product efficacy.
- Reconstructed human skin models offer a more relevant in vitro testing platform.
Purpose of the Study:
- To develop and validate a tissue-engineered human skin equivalent for cosmetic testing.
- To assess the model's ability to mimic in vivo skin architecture and responses.
- To evaluate the efficacy of bioactive compounds using this advanced model.
Main Methods:
- Co-culturing human keratinocytes and dermal fibroblasts on a collagen-glycosaminoglycan-chitosan biopolymer scaffold.
- Utilizing a three-dimensional model for long-term cultivation and repeated formulation application.
- Assessing keratinocyte differentiation markers (e.g., cytokeratin 10, filaggrin) and extracellular matrix proteins (e.g., collagen, elastin) via immunofluorescence.
Main Results:
- The engineered skin closely reproduced the in vivo architecture and dermal-epidermal interactions.
- The model demonstrated expression of key differentiation and basal lamina markers.
- Bioactives stimulated collagen synthesis and filaggrin expression, comparable to controls like vitamin C.
Conclusions:
- The engineered skin equivalent is a reliable tool for testing raw materials and cosmetic formulations.
- The model accurately predicts the efficacy of bioactives for skin moisturization and anti-aging.
- Results support claim substantiation for cosmetic products targeting dry and aged skin.
