Epidermal Regeneration
Epidermal Regeneration - Related Videos
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.
09:14
An Introduction to Aging and Regeneration
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2023
Tissues are maintained through a balance of cellular aging and regeneration. Aging refers to the gradual loss of cellular function, and regeneration is the repair of damaged tissue generally mediated by preexisting adult or somatic stem cells. Scientists are interested in understanding the biological mechanisms behind these two complex processes. By doing so, researchers may be able to use somatic stem cells to treat degenerative diseases and develop therapies that could delay the effects of...
11:12
Microinjection Wound Assay and In vivo Localization of Epidermal Wound Response Reporters in Drosophila Embryos.
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Cited by 10 •
2013
The embryonic epidermis of very late stage Drosophila embryos provides an in vivo system for rapid puncture wound response analysis and can be combined with genetic manipulations or chemical microinjection treatments to advance studies in wound healing for translation into mammalian models.
06:56
A System for Culturing Iris Pigment Epithelial Cells to Study Lens Regeneration in Newt
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Cited by 7 •
2011
In newt, the lens regenerates always from the dorsal iris by transdifferentiation of the iris pigmented epithelial cells (IPEs). Here we describe a procedure to culture dorsal and ventral newt IPE cells and their implantation to the newt eye. The implanted cells are then studied by tissue sectioning and immunohistochemistry.
08:29
Mouse Epidermal Neural Crest Stem Cell (EPI-NCSC) Cultures
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Cited by 15 •
2008
Here we show our method to isolate mouse epidermal neural crest stem cells (EPI-NCSC). Technique involves micro-dissecting whisker follicles, isolating the bulge and placeing it into tissue culture. EPI-NCSC start to emigrate from bulge explants onto the substratum within 3 - 4 days.
FAQs
Basal stem and progenitor cells divide to produce daughter cells that move toward the skin surface. As they migrate, these cells differentiate into keratinocytes and contribute to the stratified, keratinized layers. This controlled progression replaces cells lost through normal shedding while preserving the epidermis as a functional protective barrier.
Injury shifts the tissue from routine maintenance toward coordinated repair. Inflammatory signals and growth factors stimulate cell proliferation and migration, while extracellular matrix remodeling changes the local environment. These activities support re-epithelialization, the process by which new epidermal coverage forms across the wound and helps restore surface continuity.
Cell movement and wound closure depend on more than proliferation alone. Remodeling of the extracellular matrix helps organize the environment through which epidermal cells migrate, while re-epithelialization restores coverage over the damaged area. Together, these processes connect cellular activity with the physical closure needed to reestablish the skin’s protective surface.
During homeostasis, basal cells replace aged or shed cells through an ongoing cycle of division, outward migration, and differentiation. Wound healing requires a more coordinated response to damage, including inflammatory signaling, growth-factor activity, extracellular matrix remodeling, and accelerated re-epithelialization. The shared cellular foundation serves different biological goals: maintenance versus restoration after injury.
A useful analysis can follow several linked outcomes: basal-cell proliferation, outward cell migration, keratinocyte differentiation, inflammatory signaling, extracellular matrix remodeling, and re-epithelialization. Considering these events together helps researchers determine whether the epidermis is maintaining its normal structure or responding effectively to damage, rather than measuring wound closure as an isolated endpoint.
The process provides a framework for understanding tissue homeostasis and wound healing, two central biological problems involving cell renewal and repair. Its study also informs regenerative medicine and tissue engineering, where researchers seek to develop systems that reproduce or support the restoration of an organized, protective epidermal surface.
Comparing normal regeneration with impaired repair can reveal where proliferation, migration, differentiation, signaling, or matrix remodeling fails. This knowledge supports the development of therapeutic skin models and helps explain disorders involving defective healing. Such models can connect cellular mechanisms with clinically relevant differences in the ability to restore epidermal coverage.