Skin Epidermal Renewal
Skin Epidermal Renewal - Related Videos
01:12
Renewal of Skin Epidermal Stem Cells
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2023
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,...
21:16
An In Vitro Skin Irritation Test (SIT) using the EpiDerm Reconstructed Human Epidermal (RHE) Model
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Cited by 57 •
2009
In this video, we demonstrate the EpiDerm Skin Irritation test (EpiDerm SIT) developed and validated for in vitro skin irritation testing of chemicals, including cosmetic and pharmaceutical ingredients.
06:51
Isolating Hair Follicle Stem Cells and Epidermal Keratinocytes from Dorsal Mouse Skin
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Cited by 23 •
2016
An ideal model for studying adult stem cell biology is the mouse hair follicle. Here we present a protocol for isolating different populations of hair follicles stem cells and epidermal keratinocytes, employing enzymatic digestion of mouse dorsal skin followed by FACS analysis.
06:34
SCAnED - An Open-source Skin Segmentation Macro for Semi-automated Cell and Nuclei Detection in Epidermal and Dermal Skin Compartments
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2025
Here, we present a semi-automated protocol for identifying and quantifying immune and non-immune cells in skin sections using SCAnED, a free ImageJ-based macro for skin segmentation.
04:07
Generation of Organotypic Full Skin Reconstructs: A Procedure to Establish 3D Skin Model Using Human Skin Samples
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2023
This video describes the detailed protocol for generating in vitro 3D organotypic skin reconstructs to study melanoma progression. This skin model mimics both the architecture and multicellular complexity of organs in vivo.
FAQs
Basal-layer keratinocytes provide the dividing cell population that initiates replacement of epidermal cells. After proliferation, these cells move upward through the epidermis rather than remaining in the basal layer. Their movement links cell production with later maturation, allowing newly generated cells to progress toward the surface and participate in maintaining the epidermis over time.
Migration and differentiation give keratinocytes progressively specialized roles as they move toward the skin surface. During this progression, the cells mature and accumulate keratin, a structural protein associated with the epidermis. These changes prepare cells for their eventual position in the stratum corneum, connecting cellular maturation with the physical stability of the outer barrier.
Epidermal thickness depends on coordination between the production of new keratinocytes and the loss of older surface cells. Proliferation adds cells, while desquamation removes cells from the stratum corneum. If these activities remain coordinated, the epidermis preserves its tissue thickness; their relationship therefore provides an important biological measure of renewal control.
Renewal supports several protective properties of the epidermis. As keratinocytes mature and form the outer layers, the tissue helps limit water loss, preserve barrier function, and defend against environmental stress. These outcomes show why renewal is not merely a replacement process: it continually contributes to the skin’s physical protection and internal water balance.
The renewal process provides a biological framework for studying how epidermal tissue is maintained and repaired. Its linked stages of keratinocyte proliferation, upward movement, maturation, and surface shedding help researchers examine tissue replacement in the context of wound healing. This connection makes epidermal renewal relevant to investigations of tissue repair and regenerative biology.
Skin epidermal renewal offers a way to examine how changes in cell replacement and maturation may relate to aging or inflammation. Researchers can use the process as a biological context for investigating altered epidermal maintenance and barrier performance. It also helps frame studies of topical treatments by connecting treatment effects with renewal, protection, and tissue condition.