3D Artificial Skin Model Mimicking Dermal-Epidermal Junction Ridges
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Solution Overview
Problem
Current artificial skin models cannot effectively mimic the wavy ridges at the dermal-epidermal junction, which are crucial for skin aging research and drug development, and there is a need for alternative methods to animal testing due to increasing awareness of animal welfare and the desire to combat skin aging.
Innovation Solution
A multilayer-structured 3D artificial skin model is developed, comprising a dermal layer with collagen and stromal cells, a basement membrane made of cellulose acetate and collagen, and an epithelial layer, with ridges formed at the dermal-epidermal junction using transglutaminase 2 as a bioadhesive and incubation in a medium containing transforming growth factor-beta 2 (TGF-β2).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional artificial skin models are used, then animal testing can be avoided, but the wavy ridges at the dermal-epidermal junction cannot be mimicked
Solution Approach 1:
The artificial skin model is divided into distinct layers: an epidermal layer containing epithelial cells, a basement membrane layer with ridges, and a dermal layer with stromal cells. This segmentation allows each layer to be independently constructed and optimized to mimic specific skin structures, enabling accurate reproduction of the wavy ridges at the dermal-epidermal junction while maintaining overall model functionality.
Solution Approach 2:
The invention transitions from conventional 2D artificial skin models to a 3D multilayer structure. The basement membrane layer is formed with three-dimensional wavy ridges that protrude into the dermal layer, creating vertical dimensionality that accurately replicates the dermal-epidermal junction morphology observed in normal skin tissue.
2Measurement precision
If multilayer-structured artificial skin is produced, then skin aging research accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The artificial skin is segmented into functionally distinct layers: epidermal layer for barrier function, basement membrane layer for structural support with ridges, and dermal layer for elasticity. This segmentation enables precise evaluation of skin aging mechanisms in each layer while maintaining overall model integrity.
Solution Approach 2:
The model utilizes transforming growth factor-beta 2 (TGF-β2) to induce controlled changes in the dermal layer, causing it to contract and form wavy ridges in response to mechanical stress. This parameter change approach allows dynamic formation of the ridge structure during model production, simplifying the manufacturing process while achieving high measurement precision for skin aging research.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The artificial skin model accurately mimics the structure and function of normal skin, allowing for effective screening of substances for skin aging inhibition and evaluation of skin aging mechanisms, enabling the development of pharmaceutical and cosmetic compositions to combat skin aging.
Implementation Method 1
ridges formed at the dermal-epidermal junction using transglutaminase 2 as a bioadhesive
Implementation Method 2
incubation in a medium containing transforming growth factor-beta 2 (TGF-β2)
Data Source
AI summary
The present disclosure relates to a three-dimensional (3D) artificial skin model, and specifically, to a 3D artificial skin model that perfectly mimics the ridge shape of the dermal-epidermal junction, and a method for producing the same. Normal skin tissue has wavy ridges formed at the dermal-epidermal junction (DEJ), but the wavy ridges are known to flatten with aging. The artificial skin model of the present disclosure is a 3D artificial skin model that perfectly mimics the shape of the ridges at the dermal-epidermal junction. Since the artificial skin model mimics the structure and function of normal skin, it is expected to be widely used in the pharmaceutical and cosmetic fields.