Related Experiment Video
Updated: Dec 10, 2025
08:26
Isolation and Culture of Adult Epithelial Stem Cells from Human Skin
Published on: March 31, 2011
28.8K
Human epidermal stem cell differentiation is modulated by specific lipid subspecies
Matteo Vietri Rudan1, Ajay Mishra1,2, Christian Klose3
1Centre for Stem Cells and Regenerative Medicine, King's College London, SE1 9RT London, United Kingdom.
Summary
This study reveals that specific lipids, like ceramides, drive keratinocyte differentiation, a key process in skin barrier formation. Identifying these lipid regulators helps understand skin stem cell behavior.
Area of Science:
- Biochemistry
- Dermatology
- Cell Biology
Background:
- Lipids in mammalian epidermis are crucial for barrier function.
- The specific role of individual lipid species in keratinocyte differentiation is not well understood.
Purpose of the Study:
- To investigate the role of lipid subspecies in keratinocyte differentiation.
- To identify specific lipids that regulate the exit from the epidermal stem cell compartment.
Main Methods:
- Lipidomic analysis of primary human keratinocytes undergoing suspension-induced differentiation.
- Small interfering RNA (siRNA) screen of 258 lipid-modifying enzymes.
- In vitro culture of primary keratinocytes with identified lipid subspecies.
Main Results:
- Numerous lipid species accumulate during keratinocyte differentiation.
- Knockdown of ELOVL1 and SLC27A1 induced epidermal differentiation.
- Ceramides and glucosylceramides were identified as bioactive lipid subspecies that promote differentiation.
Conclusions:
- Specific lipid subspecies, including ceramides and glucosylceramides, are key regulators of keratinocyte differentiation.
- These findings highlight the potential of targeting lipid subspecies to control epidermal stem cell differentiation.
Related Concept Videos
01:12Renewal of Skin Epidermal Stem Cells
2.8K
The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
2.8K
01:26Stem Cell Niche
5.9K
The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
5.9K
01:06Multipotency and Niche of Bulge Stem Cell
4.0K
A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
4.0K
01:22iPS Cell Differentiation
3.0K
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
3.0K
01:19Clinical Applications of Epidermal Stem Cells
3.1K
Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
3.1K
01:14Maintenance of the ES Cell State
2.6K
The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
2.6K