Porous poly(vinyl alcohol)-hydrogel matrix-engineered biosynthetic cartilage

Tissue Eng Part A. 2011 Feb;17(3-4):301-9. doi: 10.1089/ten.TEA.2010.0322. Epub 2010 Oct 12.

Abstract

The objective of this study was to fabricate hydrogel matrix-engineered biosynthetic cartilage using a porous poly(vinyl alcohol) hydrogel (PVA-H) and articular chondrocytes. Chondrocytes were suspended in fibrin gel (FG) or saline carriers and injected into porous PVA-H discs and three-layered constructs (PVA-H between devitalized cartilage). After implantation in nude mice, PVA discs were explanted at 6 weeks and subjected to creep testing for a 20 h period. The three-layered constructs were explanted at 12 weeks and subjected to tensile testing to determine the strength of the interface between the engineered hydrogel and devitalized cartilage. Histological analysis revealed PVA-H porous channels occupied by chondrocytes. Extracellular matrix was identified by Safranin-O and toluidine blue stains. Immunohistochemical analysis revealed a positive stain for COL II and scant staining for COL I. Creep and relaxation response of PVA-FG-chondrocyte constructs was similar to that of native cartilage. The presence of cells and FG significantly enhanced the integration strength of layered constructs (p < 0.05). These results demonstrate that porous PVA-H in combination with FG and chondrocytes provides a favorable microenvironment for tissue engineering of articular cartilage, creating a biosynthetic construct that can adhere to native devitalized articular cartilage utilizing hydrogel matrix-engineered technology.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biocompatible Materials / chemistry
  • Biomedical Engineering / methods
  • Biomimetic Materials / chemistry*
  • Cartilage, Articular / cytology*
  • Cartilage, Articular / growth & development*
  • Cell Differentiation
  • Chondrocytes / cytology
  • Chondrocytes / physiology*
  • Chondrogenesis / physiology
  • Equipment Failure Analysis
  • Extracellular Matrix / chemistry*
  • Hydrogels / chemistry
  • Materials Testing
  • Polyvinyl Alcohol / chemistry*
  • Porosity
  • Swine
  • Tissue Engineering / instrumentation*
  • Tissue Scaffolds

Substances

  • Biocompatible Materials
  • Hydrogels
  • Polyvinyl Alcohol