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Related Concept Videos

Clinical Applications of Epidermal Stem Cells01:19

Clinical Applications of Epidermal Stem Cells

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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...
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Renewal of Skin Epidermal Stem Cells01:12

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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...
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Papillary Dermis01:11

Papillary Dermis

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Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen...
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Cells of the Epidermis01:24

Cells of the Epidermis

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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...
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Body Temperature01:25

Body Temperature

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The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
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Layers of the Epidermis01:21

Layers of the Epidermis

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The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows:
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
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Related Experiment Video

Updated: Jan 2, 2026

Separation of Rat Epidermis and Dermis with Thermolysin to Detect Site-Specific Inflammatory mRNA and Protein
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Separation of Rat Epidermis and Dermis with Thermolysin to Detect Site-Specific Inflammatory mRNA and Protein

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Dermal-Epidermal Separation by Heat.

Liyan Jian1, Yu Cao1, Ying Zou2

  • 1Institute of Precision Medicine, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Methods in Molecular Biology (Clifton, N.J.)
|December 4, 2019
PubMed
Summary
This summary is machine-generated.

Researchers describe a heat-based method for separating skin layers. This technique is crucial for dermal-epidermal separation in pharmacology, toxicology, and biology research.

Keywords:
DermisEpidermisHeatSeparation

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Area of Science:

  • Dermatology
  • Biotechnology
  • Pharmacology

Background:

  • The skin comprises three distinct layers: epidermis, dermis, and hypodermis.
  • Dermal-epidermal separation is a fundamental technique in various scientific disciplines.
  • Existing separation methods include chemical, enzymatic, and thermal approaches, each with unique pros and cons.

Purpose of the Study:

  • To detail a specific method for achieving dermal-epidermal separation.
  • To highlight the utility of heat-based separation in biological and toxicological investigations.

Main Methods:

  • The study focuses on a heat-based technique for separating the epidermis from the dermis.
  • This method is presented as a viable option among various epidermal separation strategies.

Main Results:

  • A reliable method for heat-induced dermal-epidermal separation was successfully described.
  • The presented technique offers an alternative to conventional chemical or enzymatic methods.

Conclusions:

  • Heat-based separation provides a valuable approach for dermal-epidermal dissociation.
  • The choice of separation method should be tailored to specific research requirements in pharmacology, toxicology, and biology.