Proliferation of meniscal fibrochondrocytes cultured on a new polyurethane scaffold is stimulated by TGF-ß.
J Biomater Appl
; 27(5): 617-26, 2013 Jan.
Article
em En
| MEDLINE
| ID: mdl-21926150
ABSTRACT
The aim of this study was to investigate if newly developed polyurethane (PU) scaffolds are suitable as scaffold for cell-seeded meniscus tissue engineered constructs. Scaffolds were seeded with goat meniscal fibrochondrocytes and cultured to assess changes in biological and mechanical properties. Furthermore, the effect of TGF-ß on these properties was investigated. PU scaffolds were made from poly d/l lactide and caprolactone as soft segments and 1,4-butanediisocyanate for the urethane hard segments. The porosity of the scaffolds was 95%. Isolated goat meniscal fibrochondrocytes were seeded on the scaffolds and cultured with or without the addition of 10 ng/mL TGF-ß in standard culture medium. After 2, 4, and 6 weeks of culture, scaffolds were analyzed for cell proliferation, matrix synthesis, and mechanical properties. Scanning electron microscopy and histology showed that the scaffolds had an interconnected isotropic pore structure. Without the addition of TGF-ß, cells did not proliferate during the culture period and isolated meniscus fibrochondrocytes were more frequently located in the peripheral parts of the scaffold. Fibrochondrocytes supplemented with TGF-ß were distributed throughout the construct. Clustered cells were surrounded by matrix which stained slightly positive for glycosaminoglycans (GAGs). Also, collagen production was increased significantly after 4 and 6 weeks of culture compared to cultures without TGF-ß and also more GAG staining was found after 4 and 6 weeks in the sections of the TGF-ß stimulated cultures. Despite the increase in matrix production, the compressive stiffness of the constructs was not increased during the culture period. Meniscal fibrochondrocytes were able to adhere to the PU scaffold. However, the scaffold itself does not stimulate proliferation and matrix production. The addition of TGF-ß resulted in a strong induction of both proliferation and extracellular matrix production.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Meniscos Tibiais
/
Fator de Crescimento Transformador beta
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Condrócitos
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Proliferação de Células
/
Alicerces Teciduais
Limite:
Animals
Idioma:
En
Revista:
J Biomater Appl
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Holanda