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Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules
Published on: August 19, 2015
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Composite pullulan-dextran polysaccharide scaffold with interfacial polyelectrolyte complexation fibers: a platform
Marie Francene Arnobit Cutiongco1, Ming Hao Tan1, Martin Yoke Kuang Ng1
1Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, Singapore.
Acta Biomaterialia
|July 2, 2014
Summary
This study enhanced pullulan-dextran hydrogels with interfacial polyelectrolyte complexation (IPC) fibers, improving cell adhesion and proliferation for tissue engineering. The modified scaffolds also demonstrated controlled release of growth factors like vascular endothelial growth factor (VEGF).
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Polymer Chemistry
Background:
- Hydrogels are vital in soft tissue engineering due to their similarity to the extracellular matrix.
- Naturally derived polysaccharides like pullulan and dextran offer biocompatibility but lack cell adhesion properties.
- Improving cell interaction with polysaccharide hydrogels is crucial for advanced tissue regeneration.
Purpose of the Study:
- To engineer pullulan-dextran hydrogel scaffolds with enhanced cell adhesion properties.
- To investigate the impact of interfacial polyelectrolyte complexation (IPC) fibers on scaffold functionality.
- To evaluate the controlled release and bioactivity of incorporated growth factors.
Main Methods:
- Fabrication of pullulan-dextran hydrogel scaffolds.
- Modification of scaffolds using interfacial polyelectrolyte complexation (IPC) fibers.
- Incorporation of extracellular matrix proteins and growth factors (bovine serum albumin, VEGF).
- Assessment of cell adhesion, proliferation, and growth factor release kinetics.
- Evaluation of released VEGF's biological activity on endothelial cells.
Main Results:
- The pullulan-dextran-IPC fiber composite scaffold showed significantly improved cell adhesion and proliferation compared to unmodified scaffolds.
- The composite scaffold exhibited zero-order release kinetics for incorporated bovine serum albumin and vascular endothelial growth factor (VEGF).
- Released VEGF from the scaffold maintained its bioactivity, effectively stimulating endothelial cell growth.
Conclusions:
- Interfacial polyelectrolyte complexation (IPC) fiber incorporation enhances the functionality of pullulan-dextran hydrogels.
- The modified hydrogel scaffolds support adherent cell growth and controlled release of bioactive molecules.
- These findings highlight the potential of IPC-modified hydrogels for advanced soft tissue engineering applications.
