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Cultivating a Three-dimensional Reconstructed Human Epidermis at a Large Scale
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Sweat gland development requires an eccrine dermal niche and couples two epidermal programs
Heather L Dingwall1, Reiko R Tomizawa1, Adam Aharoni1
1Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA.
Developmental Cell
|December 14, 2023
Summary
Researchers identified distinct cell types and a crucial dermal niche for eccrine sweat gland development. This discovery advances understanding of skin appendage formation and regeneration, paving the way for therapeutic strategies.
Area of Science:
- Developmental biology
- Dermatology
- Genetics
Background:
- Eccrine sweat glands are vital for thermoregulation and develop from epidermal progenitors.
- Understanding their specialized formation is limited, hindering regenerative therapies.
Purpose of the Study:
- To investigate the molecular mechanisms underlying eccrine sweat gland development.
- To identify key factors and cellular interactions involved in eccrine gland formation.
Main Methods:
- Single-nucleus RNA sequencing was used to compare gene expression in wild-type and Engrailed 1 (En1) disrupted mouse skin.
- Analysis focused on early eccrine gland development (anlagen).
Main Results:
- Two distinct epidermal transcriptomes were identified in early eccrine anlagen: one shared with hair follicles and an En1-dependent, eccrine-specific one.
- Eccrine development necessitates the induction of a specific dermal niche adjacent to the developing gland.
Conclusions:
- This study defines the molecular signatures of eccrine gland identity.
- The discovery of the eccrine dermal niche provides a foundation for targeted regeneration and skin repair strategies.
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