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PHBV/PAM scaffolds with local oriented structure through UV polymerization for tissue engineering.

Yu Ke1, Gang Wu2, Yingjun Wang3

  • 1Department of Biomedical Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China ; Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China.

Biomed Research International
|March 1, 2014
PubMed
Summary
This summary is machine-generated.

Tissue engineering scaffolds made of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) were modified with polyacrylamide (PAM) to enhance cell guidance. These new PHBV/PAM scaffolds improved chondrocyte orientation and spreading for complex tissue regeneration.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Polymer Chemistry

Background:

  • Locally oriented tissue engineering scaffolds can guide cell behavior for complex tissue regeneration.
  • Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a biodegradable polymer used in tissue engineering.
  • Controlling cell orientation and migration is crucial for functional tissue repair.

Purpose of the Study:

  • To develop and characterize PHBV scaffolds with locally oriented polyacrylamide (PAM) for improved chondrocyte guidance.
  • To investigate the effect of PAM incorporation on scaffold properties and cellular response.
  • To evaluate the potential of these modified scaffolds in directing cell attachment, spreading, and microfilament formation.

Main Methods:

  • UV graft polymerization was used to introduce oriented PAM chains into the macropores of PHBV scaffolds.
  • Scanning electron microscopy and mechanical testing were employed to characterize scaffold porosity, pore size, and compressive elastic modulus.
  • Sheep chondrocytes were cultured on PHBV and PHBV/PAM scaffolds to assess cell attachment, spreading, and orientation.

Main Results:

  • PHBV/PAM scaffolds exhibited enhanced interconnectivity, reduced pore diameter (82.15% < 100 μm vs. 31.5%), and increased compressive elastic modulus compared to pure PHBV scaffolds.
  • Sheep chondrocytes cultured on PHBV/PAM scaffolds showed directional spreading along the oriented PAM chains.
  • Evidence suggests that oriented PAM chains guided chondrocyte attachment, spreading, and microfilament formation via contact guidance.

Conclusions:

  • Locally oriented PHBV/PAM scaffolds offer a promising approach for directing cell behavior in tissue engineering.
  • The incorporation of oriented PAM significantly enhances the mechanical properties and cellular guidance capabilities of PHBV scaffolds.
  • These findings highlight the potential of guided cell attachment and spreading for regenerating complex tissues.