Related Experiment Video
Updated: Jun 10, 2026
09:16
Generation of Genetically Modified Organotypic Skin Cultures Using Devitalized Human Dermis
Published on: December 14, 2015
Epidermal differentiation governs engineered skin biomechanics
G C Ebersole1, P M Anderson, H M Powell
1Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA.
Journal of Biomechanics
|August 21, 2010
Summary
Engineered skin
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Dermatology
Background:
- Engineered skin (ES) requires mechanical strength for surgical use and engraftment.
- Understanding structural property evolution and epidermal/dermal contributions during culture is crucial.
- Current knowledge on ES biomechanics and tissue morphogenesis is limited.
Purpose of the Study:
- To investigate the mechanical properties of ES and engineered dermis (ED) during a 21-day culture period.
- To correlate mechanical properties with cellular metabolism, organization, and epidermal differentiation.
- To determine the relative contributions of epidermis and dermis to ES strength.
Main Methods:
- Mechanical testing (tensile testing) of ES and ED over 21 days.
- Assessment of epidermal differentiation via immunostaining and surface electrical capacitance.
- Analysis of cellular metabolism and organization.
- Development of a composite strength model.
Main Results:
- ES ultimate tensile strength and linear stiffness increased linearly with culture time.
- ED mechanical properties remained relatively unchanged during culture.
- ES strength showed significant correlation with epidermal differentiation (p < 0.001).
- A strength model indicated the epidermis is the primary determinant of ES strength.
Conclusions:
- Epidermal differentiation is the main driver of engineered skin's mechanical strength.
- Strategies to enhance ES biomechanics should focus on improving the dermis.
- Time-dependent mechanical data can inform safe mechanical stimulation limits for engineered tissues.
Related Concept Videos
01:12Renewal 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,...
01:19Clinical 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...
00:57Cellular Differentiation
How does a complex organism such as a human develop from a single cell? It all starts from a single fertilized egg which gives rise to a vast array of cell types, such as nerve cells, muscle cells, and epithelial cells that characterize the adult? Throughout development and adulthood, cellular differentiation leads cells to assume their final morphology and physiology. Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions.
A zygote is a...
A zygote is a...