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Tissue Characterization after a New Disaggregation Method for Skin Micro-Grafts Generation
Published on: March 4, 2016
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Bioengineered Skin Grafts from Patient-Derived Decellularized Extracellular Matrix and Autologous Cells for
RaeHui Kang1, Suyeon Shin2, Yurim Choi2
1Division of Interdisciplinary Bioscience & Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, 37666, Republic of Korea.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|September 25, 2025
Summary
This study developed a patient-specific 3D-bioprinted skin model using decellularized ECM bioink. The innovative model enhances wound healing and tissue integration, offering a promising platform for regenerative medicine.
Area of Science:
- Regenerative Medicine
- Tissue Engineering
- Biomaterials Science
Background:
- Current skin models lack patient specificity and native extracellular matrix (ECM) composition.
- This limits their clinical relevance in regenerative medicine and wound healing applications.
Purpose of the Study:
- To develop a patient-specific 3D-bioprinted skin model.
- To mimic native skin architecture and function using patient-derived decellularized ECM (pddECM) and keratin-alginate (KA) bioinks.
- To evaluate the model's efficacy in promoting wound healing and tissue integration.
Main Methods:
- Fabrication of a 3D-bioprinted skin construct using pddECM and KA bioinks.
- Assessment of human dermal fibroblast (HDF) viability, collagen I production, and ECM remodeling.
- Evaluation of keratinocyte activation, cornification, cell migration, and angiogenesis.
- In vivo studies using GelMA and GelMA+pddECM scaffolds for wound closure assessment.
- Cytokine profiling to analyze the inflammatory and remodeling environment.
Main Results:
- The pddECM bioink supported high HDF viability and promoted collagen I production and ECM remodeling.
- The KA bioink enhanced keratinocyte activation and cornification.
- The construct demonstrated improved cell migration, angiogenesis, and reduced hypoxic stress.
- In vivo, scaffolds accelerated wound closure without toxicity, preserving dermal thickness and inducing migrating epidermal tongue (MET) expression.
- Cytokine profiling indicated a fibrosis-suppressive environment with upregulation of ICAM-1 and complement C5.
Conclusions:
- The developed patient-specific, bioactive skin model effectively mimics native skin architecture and function.
- This advanced skin model shows significant potential for personalized wound healing, drug screening, and skin grafting.
- The model represents a next-generation platform for translational tissue engineering applications.
