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Generation of Genetically Modified Organotypic Skin Cultures Using Devitalized Human Dermis
Published on: December 14, 2015
In vivo dedifferentiation of human epidermal cells
Haihong Li1, Xiaobing Fu, Lei Zhang
1Mental Health Center, ShanTou University Medical College, GuangDong Province, and Wound Healing and Cell Biology Laboratory, Burns Institute, The First Affiliated Hospital (304th Hospital), Beijing 100037, PR China.
Cell Biology International
|August 11, 2007
Summary
Differentiated epidermal cells can revert to stem cell-like states in vivo. This study provides new evidence of epidermal cell dedifferentiation in skin wound healing.
Area of Science:
- Dermatology
- Stem Cell Biology
- Regenerative Medicine
Background:
- Epidermal differentiation is a complex process.
- Understanding the plasticity of differentiated cells is crucial for regenerative medicine.
Purpose of the Study:
- To provide further evidence for the dedifferentiation of epidermal cells into stem cells or stem cell-like populations in vivo.
- To investigate the potential of differentiated epidermal cells to revert to a less specialized state.
Main Methods:
- Epidermal sheets, depleted of basal cells, were labeled with 6-diamidino-2-phenylindole (DAPI).
- Labeled sheets were transplanted onto full-thickness skin wounds in nude mice.
- Immunohistochemistry and flow cytometry were used to analyze cell populations post-transplantation.
Main Results:
- DAPI-positive cells expressing cytokeratins (CK19, CK14) or beta1 integrin were observed in spinous and granular layers at day 7.
- A significant increase in alpha6briCDdim and alpha6briCD71bri populations was noted in grafted epidermal sheets compared to pre-transplantation levels (P<0.05).
Conclusions:
- Differentiated epidermal cells within engrafted sheets can dedifferentiate into stem cell-like cells in vivo.
- These findings offer novel insights into cellular plasticity and dedifferentiation mechanisms in epidermal regeneration.
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