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Mechanical properties of tissue-engineered vascular constructs produced using arterial or venous cells
Robert Gauvin1, Maxime Guillemette, Todd Galbraith
1Centre LOEX de l'Université Laval, Génie tissulaire et régénérationand Département de Chirurgie, Faculté de Médecine, Université Laval Québec, Québec, Canada.
Tissue Engineering. Part A
|April 5, 2011
Summary
Tissue-engineered vascular constructs from human umbilical cord cells show promise. Arterial cell-derived grafts exhibit superior mechanical strength and stiffness compared to venous cell-derived grafts for vascular repair.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Vascular Biology
Background:
- Current surgical options for blood vessel replacement are limited by autologous vessel availability and synthetic graft performance in small-diameter arteries.
- Tissue-engineered vascular grafts offer a potential solution to overcome these limitations.
Purpose of the Study:
- To compare the mechanical properties of arterial and venous tissue-engineered vascular constructs.
- To evaluate the influence of cell source (arterial vs. venous) on construct properties.
Main Methods:
- Self-assembly approach using human umbilical cord-derived arterial and venous cells.
- Production of tissue-engineered vascular media and adventitia (TEVMA) constructs.
- Assessment of mechanical properties via uniaxial tensile testing and cyclic loading.
- Histological and immunofluorescence analysis of extracellular matrix composition.
Main Results:
- Arterial cell-derived constructs demonstrated significantly greater strength and stiffness than venous cell-derived constructs.
- Cyclic loading revealed higher load-bearing capacity for arterial constructs at equivalent strain levels.
- Distinct tissue properties were observed based on the origin of smooth muscle cells and fibroblasts.
Conclusions:
- Human umbilical cord cells can be successfully utilized to fabricate vascular constructs.
- Arterial cell-derived TEVMAs exhibit superior mechanical properties compared to venous cell-derived counterparts.
- Cell source significantly impacts the mechanical characteristics of engineered vascular tissues, highlighting potential for tailored graft development.
