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Related Experiment Video

Updated: May 4, 2026

Cultivating a Three-dimensional Reconstructed Human Epidermis at a Large Scale
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In Vitro Functional and Structural Evaluation of Low-Complexity Artificial Human Epidermis for 3D Tissue Engineering.

Dorottya Kocsis1, Dániel Sztankovics2, Liza Józsa3

  • 1Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Práter u. 50a., 1083 Budapest, Hungary.

Bioengineering (Basel, Switzerland)
|March 28, 2025
PubMed
Summary

Researchers developed artificial skin using hydrogels to replace animal testing. GelMA C hydrogel with specific keratinocyte concentrations and maturation time showed superior cell survival and differentiation for potential skin substitutes.

Keywords:
GelMA CHaCaTalginateartificial epidermisbioinksmorphologypermeabilityskin barriertissue engineering

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Area of Science:

  • Tissue Engineering
  • Biomaterials Science
  • Dermatology

Background:

  • Increasing demand for in vitro human cell systems to replace animal testing in drug development.
  • Need for alternatives to animal skin for wound and burn treatments.
  • In vitro skin models are crucial for assessing topical product safety and efficacy.

Purpose of the Study:

  • To explore the production of artificial epidermis using alginate and GelMA C hydrogel scaffolds.
  • To optimize keratinocyte concentration and tissue maturation time for artificial skin development.
  • To compare the functional and morphological properties of alginate and GelMA C hydrogels as skin substitutes.

Main Methods:

  • Fabrication of artificial epidermis using alginate and GelMA C hydrogels.
  • Optimization of keratinocyte seeding density (10-50-100 × 10^6/mL) and maturation periods (fresh, 1, 3, 4 weeks).
  • Assessment of hydrogel behavior, structure, cell survival, tissue differentiation (histology, immunohistochemistry), and caffeine permeability.

Main Results:

  • GelMA C hydrogel demonstrated superior cell survival and tissue differentiation compared to alginate.
  • Optimal conditions identified: 3-week incubation with 50 × 10^6/mL keratinocytes for the GelMA C system.
  • Caffeine permeability order: alginate > GelMA C > cellulose acetate membrane > rat skin.

Conclusions:

  • GelMA C hydrogel serves as a more favorable scaffold for artificial epidermis development than alginate.
  • The optimized conditions provide a foundation for creating effective artificial skin substitutes.
  • Further optimization for biocompatibility, physical, and mechanical properties is necessary for clinical application in tissue engineering.