Cartilage tissue engineering on fibrous chitosan scaffolds produced by a replica molding technique

Guillaume R. Ragetly, Gregory J. Slavik, Brian T. Cunningham, David J. Schaeffer, Dominique J. Griffon

Research output: Contribution to journalArticlepeer-review

Abstract

The biocompatibility of chitosan and its similarity with glycosaminoglycans make it attractive as a scaffold for cartilage engineering. Fibrous scaffolds may simulate cartilage extracellular matrix structure and promote chondrocyte functions. Our objectives were to produce chitosan fibers of different size and evaluate their potential for chondrogenesis. A novel replica molding technique was developed to produce chitosan nonwoven scaffolds made of fiber measuring 4, 13, or 22 lm in width. A polyglycolic acid mesh (PGA) served as a reference group. Controls were analyzed 48 h after seeding porcine chondrocytes via scanning electron microscopy (SEM), DNA, and glycosaminoglycan (GAG) quantifications. Constructs were cultured for 21 days prior to confocal microscopy, SEM, histology, and quantitive analysis (weight, water, DNA, GAG and collagen II). Chondrocytes maintained their phenotypic appearance and a viability above 85% on the chitosan scaffolds. Chondrocytes attach preferentially to PGA, resulting in a greater cellularity of these constructs. However, based on the GAG/DNA and Collagen II/DNA ratios, matrix production per chondrocyte was improved in chitosan constructs, especially on smaller fibers. The differences between PGA and chitosan are more likely to result from the chemical composition rather than their structural characteristics. Although chitosan appears to promote matrix formation, further studies should be aimed at improving its cell adhesion properties.

Original languageEnglish (US)
Pages (from-to)46-55
Number of pages10
JournalJournal of Biomedical Materials Research - Part A
Volume93
Issue number1
DOIs
StatePublished - Apr 1 2010

Keywords

  • Cartilage engineering
  • Chitosan
  • Chondrocyte
  • Replica molding technique
  • Scaffold

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials
  • Ceramics and Composites
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Cartilage tissue engineering on fibrous chitosan scaffolds produced by a replica molding technique'. Together they form a unique fingerprint.

Cite this