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Epidermal keratinocyte stem cells: their maintenance and regulation
1Beatson Institute for Cancer Research, Bearsden, Glasgow, UK.
Seminars in Cell Biology
|December 1, 1992
Summary
Epidermal stem cells in the skin regenerate epidermal proliferative units (EPUs). Evidence suggests skin cells like Langerhans cells and dermal cells may create stem cell niches, influencing epidermal diversity.
Area of Science:
- Dermatology
- Stem Cell Biology
- Skin Biology
Background:
- The epidermis, a stratified epithelium, comprises interfollicular regions and appendages.
- Keratinocytes, the main epidermal cells, are organized into epidermal proliferative units (EPUs).
- A single stem cell within each EPU is responsible for cell replacement.
Purpose of the Study:
- To review evidence on factors influencing epidermal stem cell behavior.
- To explore the role of the microenvironment in maintaining epidermal stem cell populations and diversity.
Main Methods:
- Literature review of existing research on epidermal structure and cell interactions.
- Analysis of studies investigating epidermal Langerhans' cells (ELCs) and dermal cells.
Main Results:
- Evidence suggests that epidermal Langerhans' cells (ELCs) and dermal cells may influence the keratinocyte microenvironment.
- These interactions may contribute to the formation of stem cell 'niches' within the basal layer of the epidermis.
- The microenvironment may play a role in generating cellular diversity in the basal layer.
Conclusions:
- The skin's microenvironment, including ELCs and dermal cells, is crucial for epidermal stem cell regulation.
- Stem cell niches and cellular diversity in the basal epidermis are likely modulated by these cellular interactions.