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A multi-layered vascular scaffold with symmetrical structure by bi-directional gradient electrospinning
Tong Wu1, Chen Huang2, Dawei Li2
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
Colloids and Surfaces. B, Biointerfaces
|June 24, 2015
Summary
This study presents a novel multi-layered vascular scaffold using gradient electrospinning. The new scaffold offers enhanced mechanical properties, biocompatibility, and biodegradability for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Multi-layered scaffolds offer superior biomechanics, biocompatibility, and biodegradability compared to single-structure scaffolds in vascular tissue engineering.
- Developing advanced scaffolds is crucial for improving vascular graft functionality and patient outcomes.
Purpose of the Study:
- To fabricate a multi-layered, symmetrical tubular scaffold using a bi-directional gradient electrospinning method.
- To evaluate the mechanical properties, biocompatibility, and biodegradability of the novel scaffold compared to a blended scaffold.
Main Methods:
- Fabrication of poly(l-lactide-co-caprolactone) (P(LLA-CL)), collagen, and chitosan based tubular scaffolds via bi-directional gradient electrospinning.
- Assessment of scaffold mechanical properties, endothelialization, human smooth muscle cell (hSMC) growth, and biodegradability (fiber morphology, pH balance, long-term mechanical support).
Main Results:
- The multi-layered composite scaffold exhibited improved mechanical properties and biocompatibility over the blended scaffold.
- Accelerated endothelialization and enhanced hSMC growth were observed on the multi-layered scaffold due to its bioactive surface.
- The gradient structure significantly improved scaffold biodegradability, evidenced by fiber morphology, pH balance, and sustained mechanical support.
Conclusions:
- The developed bi-directional gradient electrospinning technique successfully created a superior multi-layered vascular scaffold.
- This novel scaffold demonstrates significant potential for vascular tissue engineering due to its enhanced performance characteristics.
- The gradient architecture is key to improving the overall functionality and degradation profile of the vascular scaffold.
