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Isolation of Mouse Epidermal Keratinocytes and Their In Vitro Clonogenic Culture
Published on: August 10, 2019
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Single-keratinocyte transcriptomic analyses identify different clonal types and proliferative potential mediated by
Elena Enzo1, Alessia Secone Seconetti1,2, Mattia Forcato3
1Centre for Regenerative Medicine "Stefano Ferrari", University of Modena and Reggio Emilia, Modena, Italy.
Nature Communications
|May 5, 2021
Summary
Researchers identified key genes to distinguish stem cells in epidermal cultures, crucial for successful skin grafts in burn patients and genetic skin diseases. This improves the ability to measure essential stem cells for regenerative medicine applications.
Area of Science:
- Regenerative Medicine
- Dermatology
- Stem Cell Biology
Background:
- Autologous epidermal cultures are vital for restoring skin function in burn patients.
- Genetic skin diseases like Junctional Epidermolysis Bullosa also benefit from epidermal grafts.
- Identifying and quantifying epidermal stem cells is crucial for graft success but challenging.
Purpose of the Study:
- To identify molecular markers that distinguish epidermal stem cells from other keratinocytes.
- To understand the hierarchical organization and differentiation trajectory of epidermal cells.
- To find key regulators of epidermal stem cell function.
Main Methods:
- Single-cell transcriptome analysis of primary human epidermal cultures.
- Bioinformatic analysis to identify gene expression patterns and cell hierarchies.
- Validation of gene markers and regulatory pathways.
Main Results:
- Distinct gene expression categories were identified for different keratinocyte clonal types.
- Epidermal stem cells (holoclone-forming cells) show hallmarks of DNA repair, chromosome segregation, spindle organization, and telomerase activity.
- FOXM1 was identified as a YAP-dependent key regulator of epidermal stem cells.
Conclusions:
- Single-cell transcriptomics provides criteria for measuring stem cells in epidermal cultures.
- Understanding keratinocyte hierarchies and stem cell regulators is essential for improving skin grafting techniques.
- These findings advance the field of regenerative medicine for skin disorders.
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