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Vascular Network Formation on Macroporous Polydioxanone Scaffolds.

Sebastian Heene1, Stefanie Thoms1, Stefan Kalies2

  • 1Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany.

Tissue Engineering. Part A
|January 5, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed biodegradable polydioxanone (PDO) scaffolds coated with autologous fibrin to create microvascular networks. This tissue engineering approach uses endothelial cells and mesenchymal stem cells for vascularized tissue constructs.

Keywords:
VEGFangiogenesisfibrinpolydioxanonescaffoldsvascular networks

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Developing functional microvascular networks is crucial for engineered tissues.
  • Biodegradable synthetic polymers offer promising scaffold materials.
  • Cell-matrix interactions are key for vascularization.

Purpose of the Study:

  • To generate microvascular networks on novel macroporous polydioxanone (PDO) scaffolds.
  • To optimize cell seeding and culture conditions for vascular network formation.
  • To evaluate the potential of these scaffolds for vascularized tissue engineering.

Main Methods:

  • Fabrication of macroporous PDO scaffolds using porogen leaching and cryo-drying.
  • Scaffold coating with autologous fibrin for enhanced cell adhesion.
  • Co-culturing GFP-HUVECs and AD-hMSCs on scaffolds.
  • Optimization of growth factor concentrations (VEGF, bFGF, hydrocortisone) and cell ratios.
  • Quantification of network formation using AngioTool® and dextran staining for lumenization.

Main Results:

  • PDO scaffolds demonstrated stability and suitable pore sizes (326 ± 149.67 μm) for 4 weeks.
  • Autologous fibrin coating supported cell adherence and network formation.
  • An optimal ratio of 2:3 GFP-HUVECs/AD-hMSCs with specific growth factors yielded robust networks.
  • Vascular networks formed within 2 days and stabilized by day 7, exhibiting lumenization.

Conclusions:

  • Biodegradable PDO scaffolds combined with autologous fibrin provide a viable platform for generating microvascular networks.
  • This approach supports endothelial and mesenchymal stem cell co-culture for functional vascularization.
  • The developed microvascular tissue patches hold potential for diverse vascularized tissue engineering constructs.