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A Recombinant Elastic Peptide Rescues Elasticity From a Self-Assembled Dermal Sheet Model Treated With Ascorbic Acid
Chloé Chave1,2, Jorgan Guard1, Thibault Massias1
1Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR5305 CNRS/Université Claude Bernard Lyon 1, Lyon, France.
Experimental Dermatology
|February 6, 2026
Summary
A synthetic elastic protein (SEP) enhances elastic fiber formation in engineered skin, counteracting ascorbic acid
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Dermatology
Background:
- The skin's extracellular matrix (ECM), composed of collagen and elastin, dictates tissue structure and function.
- ECM imbalances in dermal substitutes compromise mechanical properties and physiological relevance.
- Ascorbic acid (AA) negatively impacts elastic fiber biosynthesis in tissue engineering.
Purpose of the Study:
- To evaluate a synthetic elastic protein (SEP) for improving ECM remodeling in dermal substitutes.
- To restore collagen and elastin equilibrium in reconstructed skin tissues.
- To investigate SEP's efficacy in conjunction with ascorbic acid.
Main Methods:
- Fibroblast cultures treated with varying SEP concentrations, with or without AA.
- Western blot and immunofluorescence to assess protein expression and localization.
- Ultrastructural analysis of 3D dermal substitutes.
- Dynamic mechanical analysis of decellularized ECM.
Main Results:
- SEP promoted elastic fiber formation despite the presence of AA, which normally inhibits elastin synthesis.
- SEP did not impede type I collagen assembly.
- Ultrastructural analysis revealed SEP colocalization with fibrillin-rich fibrils in 3D constructs.
- Mechanical testing showed significant increases in elastic (46%) and Young's moduli (40%) with SEP treatment.
Conclusions:
- SEP effectively restores ECM integrity and balances collagen and elastin in engineered skin.
- SEP demonstrates potential as a biomimetic tool for developing advanced 3D skin substitutes.
- SEP application may enhance the physiological relevance and therapeutic efficacy of engineered skin tissues.
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