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Engineering edgeless human skin with enhanced biomechanical properties
Alberto Pappalardo1, David Alvarez Cespedes1, Shuyang Fang2
1Department of Dermatology, Columbia University Irving Medical Center, New York, NY 10032, USA.
Science Advances
|January 27, 2023
Summary
Researchers developed wearable edgeless skin constructs (WESCs) that mimic human skin's 3D shape. These advanced skin grafts offer improved wound healing for complex body areas.
Area of Science:
- Tissue Engineering
- Biomedical Engineering
- Regenerative Medicine
Background:
- Current 3D skin constructs are flat, limiting their application on complex anatomical sites.
- Existing methods do not replicate the fully enclosed geometry of native human skin.
Purpose of the Study:
- To engineer fully enclosed, wearable 3D skin constructs (WESCs) that can be shaped to body parts.
- To evaluate the functional and mechanical properties of WESCs compared to conventional constructs.
- To assess the efficacy of WESCs in covering full-thickness wounds on challenging anatomical locations.
Main Methods:
- Development of WESCs engineered for a fully enclosed 3D geometry.
- Assessment of extracellular matrix (ECM) deposition and mechanical properties.
- Evaluation of cell and ECM alignment within WESCs.
- Testing WESC transplantation in full-thickness wounds on mouse hindlimbs.
Main Results:
- WESCs exhibited enhanced dermal ECM deposition and superior mechanical properties over conventional constructs.
- Demonstrated region-specific cell/ECM alignment and physiologic anisotropic mechanical characteristics.
- Successfully replaced skin in full-thickness wounds on mouse hindlimbs with minimal suturing and reduced surgery time.
Conclusions:
- WESCs represent a novel technology for creating 3D skin replacements that mimic native tissue macroanatomy.
- Recapitulating tissue geometry significantly enhances biological function and wound healing capabilities.
- This technology holds potential for substantial improvements in treating complex wounds and burns.
