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Characterizing Cell Migration Within Three-dimensional In Vitro Wound Environments
Published on: August 16, 2017
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Growth factor-functionalized silk membranes support wound healing in vitro.
Michaela Bienert1, M Hoss, M Bartneck
1Institute of Pathology, RWTH Aachen University, Pauwelsstraße 30, D-52074 Aachen, Germany. Helmholtz Institute for Biomedical Engineering, Biointerface Laboratory, RWTH Aachen University, Pauwelsstraße 30, D-52074 Aachen, Germany.
Biomedical Materials (Bristol, England)
|June 3, 2017
Summary
Genetically engineered silk membranes functionalized with growth factors show promise for chronic wound healing. Vascular Endothelial Growth Factor (VEGF)-functionalized silk demonstrated significant potential in promoting angiogenesis and wound repair in vitro.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Chronic wounds pose a significant clinical challenge, necessitating advanced wound care solutions.
- Silk biomaterials derived from Bombyx mori offer versatile platforms for medical applications.
- Genetic engineering of silk allows for the incorporation of bioactive molecules to enhance therapeutic properties.
Purpose of the Study:
- To evaluate the efficacy of growth factor-functionalized silk membranes in promoting in vitro wound healing.
- To compare the performance of silk functionalized with Fibroblast Growth Factor (FGF), Epidermal Growth Factor (EGF), Keratinocyte Growth Factor (KGF), Platelet-Derived Growth Factor (PDGF), and Vascular Endothelial Growth Factor (VEGF) against native silk.
Main Methods:
- Development of genetically engineered Bombyx mori silk membranes functionalized with specific growth factors.
- In vitro assessment of silk membrane cytocompatibility using macrophage assays.
- Evaluation of angiogenesis, macrophage adhesion, and wound healing capacity using dermal equivalents and keratinocyte models.
Main Results:
- All silk membranes, including native silk, were cytocompatible and supported macrophage secretion of CXCL1 and MCP-1.
- VEGF-functionalized silk showed superior performance in angiogenesis assays compared to other growth factor-functionalized silks, though not exceeding native silk.
- EGF- and VEGF-functionalized silk membranes enhanced macrophage adhesion, while EGF-, FGF-, and VEGF-functionalized silks improved wound healing capacity in vitro.
Conclusions:
- Growth factor-functionalized silk membranes derived from genetically engineered silkworms represent a promising advancement in wound dressing technology.
- Specific growth factors, notably VEGF and EGF, show potential for enhancing key aspects of the wound healing process.
- These engineered silk biomaterials hold promise for future therapeutic strategies in managing chronic wounds.
