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Related Experiment Videos

Biodegradable elastomeric scaffolds with basic fibroblast growth factor release.

Jianjun Guan1, John J Stankus, William R Wagner

  • 1McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, USA.

Journal of Controlled Release : Official Journal of the Controlled Release Society
|May 19, 2007
PubMed
Summary
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Biodegradable poly(ester urethane)urea scaffolds releasing basic fibroblast growth factor (bFGF) mimic soft tissue mechanics. These bFGF-releasing scaffolds promote smooth muscle cell growth, showing promise for cardiovascular tissue engineering.

Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Soft tissue scaffolds require mechanical properties similar to native tissues for effective in vivo healing and development.
  • Controlled release of angiogenic factors, like basic fibroblast growth factor (bFGF), can promote tissue regeneration.

Purpose of the Study:

  • To fabricate and characterize biodegradable poly(ester urethane)urea (PEUU) scaffolds loaded with bFGF.
  • To evaluate the mechanical properties, degradation, and bioactivity of these bFGF-releasing scaffolds.

Main Methods:

  • Fabrication of PEUU scaffolds using thermally induced phase separation.
  • Assessment of scaffold morphology, porosity, mechanical strength, and degradation.
  • Evaluation of bFGF release kinetics and bioactivity (smooth muscle cell proliferation).

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Main Results:

  • Scaffolds exhibited high porosity (≥90%) and tunable mechanical properties (0.25-2.8 MPa tensile strength).
  • Heparin incorporation modulated bFGF release; released bFGF remained bioactive for 21 days.
  • bFGF-loaded scaffolds enhanced smooth muscle cell density and showed slightly increased degradation rates.

Conclusions:

  • Biodegradable PEUU scaffolds with controlled bFGF release possess suitable mechanical properties and bioactivity for soft tissue engineering.
  • These scaffolds hold potential for cardiovascular and other soft tissue applications requiring angiogenesis and cell growth.