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Tri-layered Electrospinning to Mimic Native Arterial Architecture using Polycaprolactone, Elastin, and Collagen: A Preliminary Study
Published on: January 4, 2011
Tri-layered electrospinning to mimic native arterial architecture using polycaprolactone, elastin, and collagen: a
Michael J McClure1, Scott A Sell, David G Simpson
1Department of Biomedical Engineering, Virginia Commonwealth University, USA. mccluremj2@vcu.edu
Journal of Visualized Experiments : Jove
|January 21, 2011
Summary
This study fabricated multi-layered electrospun grafts using poly(caprolactone) (PCL), elastin, and collagen. The resulting conduits mimicked native artery mechanical properties, showing potential for tissue regeneration.
Area of Science:
- Biomaterials Engineering
- Tissue Engineering
- Vascular Grafts
Background:
- Native arteries rely on collagen and elastin for mechanical integrity and recovery.
- Developing synthetic vascular grafts requires mimicking native tissue mechanics.
Purpose of the Study:
- To fabricate a multi-layered electrospun conduit mimicking native artery structure and mechanical properties.
- To evaluate poly(caprolactone) (PCL) blends with elastin and collagen for vascular graft applications.
- To assess the suitability of these grafts for tissue regeneration.
Main Methods:
- Fabrication of multi-layered electrospun conduits using PCL-elastin-collagen blends (45-45-10, 55-35-10, 65-25-10).
- Mechanical testing including uniaxial tensile testing, dynamic compliance, suture retention, and burst strength.
- Mathematical modeling to analyze layer stiffness effects on wall stress.
Main Results:
- Graft compliance ranged from 0.8 - 2.8 % / 100 mmHg, influenced by the medial layer.
- Average modulus ranged from 2.0 - 11.8 MPa, comparable to native artery.
- Mechanical properties were within the range of native arterial tissue.
Conclusions:
- A tri-layered graft structure can be mimicked by adjusting individual layer properties.
- The fabricated PCL-elastin-collagen grafts demonstrate potential for vascular tissue engineering.
- The study provides a design framework for creating mechanically suitable vascular grafts.
