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Related Experiment Videos

Reconstituted skin from murine embryonic stem cells.

Christelle Coraux1, Caroline Hilmi, Matthieu Rouleau

  • 1INSERM U385, 06107 Nice, France.

Current Biology : CB
|May 16, 2003
PubMed
Summary

Murine embryonic stem cells successfully differentiated into bioengineered skin in vitro. This engineered skin mimics embryonic skin structure and markers, offering a novel tool for developmental biology research.

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Area of Science:

  • Stem cell biology
  • Developmental biology
  • Tissue engineering

Background:

  • Embryonic stem (ES) cells possess pluripotency, enabling differentiation into various cell types.
  • Skin development involves complex interactions between mesoderm and ectoderm during embryogenesis.

Purpose of the Study:

  • To investigate the in vitro differentiation of keratinocytes from murine ES cells.
  • To assess the capacity of ES cell-derived keratinocytes to form a functional epidermal equivalent.
  • To analyze the structural and molecular resemblance of the engineered skin to native embryonic skin.

Main Methods:

  • Murine ES cells were cultured on extracellular matrix (ECM) with Bone Morphogenic Protein-4 (BMP-4) or ascorbate to induce keratinocyte differentiation.
  • Keratinocytes were enriched and cultured at the air-liquid interface on a collagen-coated substratum to form an epidermal equivalent.

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  • Morphological analysis using light and transmission electron microscopy was performed.
  • Immunohistochemical studies assessed the expression of epidermal and fibroblast markers.

    • Main Results:

    • Enriched keratinocytes formed a stratified epithelium resembling epidermal structure.
    • An underlying fibroblast lineage compartment was systematically generated.
    • The reconstituted tissue exhibited morphological and immunohistochemical characteristics similar to embryonic skin.
    • Expression patterns of cytokeratins, basement membrane proteins, and differentiation markers were consistent with native skin.

    Conclusions:

    • Murine ES cells can be differentiated in vitro to reconstitute a fully formed skin structure.
    • ES-derived bioengineered skin serves as a valuable model for studying epidermal and dermal development.
    • This model facilitates research into the molecular mechanisms governing skin differentiation and commitment.