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Related Concept Videos

Renewal of Skin Epidermal Stem Cells01:12

Renewal of Skin Epidermal Stem Cells

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 cells,...
Clinical Applications of Epidermal Stem Cells01:19

Clinical Applications of Epidermal Stem Cells

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 EpiSCs...
Stem Cell Niche01:26

Stem Cell Niche

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...
Cells of the Epidermis01:24

Cells of the Epidermis

The epidermis is made of four or five layers of epithelial cells, depending on its location in the body. From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
The cells in all these layers except the stratum basale are called keratinocytes, a type of cell that manufactures and stores the protein keratin. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from...
Maintenance of the ES Cell State01:14

Maintenance of the ES Cell State

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...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...

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Related Experiment Video

Updated: May 23, 2026

Stimulation of Stem Cell Niches and Tissue Regeneration in Mouse Skin by Switchable Protoporphyrin IX-Dependent Photogeneration of Reactive Oxygen Species In Situ
10:05

Stimulation of Stem Cell Niches and Tissue Regeneration in Mouse Skin by Switchable Protoporphyrin IX-Dependent Photogeneration of Reactive Oxygen Species In Situ

Published on: May 8, 2020

Mechanisms regulating epidermal stem cells.

Benjamin Beck1, Cédric Blanpain

  • 1Interdisciplinary Research Institute (IRIBHM), Université Libre de Bruxelles, Brussels, Belgium.

The EMBO Journal
|March 22, 2012
PubMed
Summary
This summary is machine-generated.

Stem cells in skin appendages like hair follicles and sebaceous glands are crucial for epidermal renewal. New research clarifies their roles and the molecular mechanisms, including micro-RNAs, governing skin stem cell (SC) function.

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Generation of Genetically Modified Organotypic Skin Cultures Using Devitalized Human Dermis

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Related Experiment Videos

Last Updated: May 23, 2026

Stimulation of Stem Cell Niches and Tissue Regeneration in Mouse Skin by Switchable Protoporphyrin IX-Dependent Photogeneration of Reactive Oxygen Species In Situ
10:05

Stimulation of Stem Cell Niches and Tissue Regeneration in Mouse Skin by Switchable Protoporphyrin IX-Dependent Photogeneration of Reactive Oxygen Species In Situ

Published on: May 8, 2020

Isolating Hair Follicle Stem Cells and Epidermal Keratinocytes from Dorsal Mouse Skin
06:51

Isolating Hair Follicle Stem Cells and Epidermal Keratinocytes from Dorsal Mouse Skin

Published on: April 29, 2016

Generation of Genetically Modified Organotypic Skin Cultures Using Devitalized Human Dermis
09:16

Generation of Genetically Modified Organotypic Skin Cultures Using Devitalized Human Dermis

Published on: December 14, 2015

Area of Science:

  • Dermatology
  • Stem Cell Biology
  • Molecular Biology

Background:

  • The skin epidermis comprises appendages like hair follicles and sebaceous glands.
  • Stem cells (SCs) reside in various epidermal niches, maintaining distinct compartments.
  • The precise roles of different SC populations and their proliferation/differentiation regulation remain unclear.

Purpose of the Study:

  • To review recent findings on epidermal stem cell (SC) functions.
  • To elucidate the contribution of specific SC populations to epidermal lineages.
  • To discuss mechanisms regulating SC renewal and differentiation.

Main Methods:

  • Review of recent scientific literature.
  • Analysis of studies on hair follicle stem cells.
  • Examination of research on chromatin modifications and micro-RNAs (miRs).

Main Results:

  • Hair follicle stem cells contribute to the sebaceous lineage.
  • Chromatin modifications play a role in regulating epidermal SCs.
  • Micro-RNAs (miRs) are important in epidermal SC renewal and differentiation.

Conclusions:

  • Recent studies offer new insights into epidermal stem cell (SC) regulation.
  • Understanding SC contributions and regulatory mechanisms is vital for skin health.
  • This review highlights key advancements in comprehending epidermal SC functions.