Anisotropic fibrous scaffolds for articular cartilage regeneration.

Details

Serval ID
serval:BIB_4E07D64E3116
Type
Article: article from journal or magazin.
Collection
Publications
Title
Anisotropic fibrous scaffolds for articular cartilage regeneration.
Journal
Tissue engineering. Part A
Author(s)
McCullen S.D., Autefage H., Callanan A., Gentleman E., Stevens M.M.
ISSN
1937-335X (Electronic)
ISSN-L
1937-3341
Publication state
Published
Issued date
10/2012
Peer-reviewed
Oui
Volume
18
Number
19-20
Pages
2073-2083
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
Articular cartilage lesions, which can progress to osteoarthritis, are a particular challenge for regenerative medicine strategies, as cartilage function stems from its complex depth-dependent microstructural organization, mechanical properties, and biochemical composition. Fibrous scaffolds offer a template for cartilage extracellular matrix production; however, the success of homogeneous scaffolds is limited by their inability to mimic the cartilage's zone-specific organization and properties. We fabricated trilaminar scaffolds by sequential electrospinning and varying fiber size and orientation in a continuous construct, to create scaffolds that mimicked the structural organization and mechanical properties of cartilage's collagen fibrillar network. Trilaminar composite scaffolds were then compared to homogeneous aligned or randomly oriented fiber scaffolds to assess in vitro cartilage formation. Bovine chondrocytes proliferated and produced a type II collagen and a sulfated glycosaminoglycan-rich extracellular matrix on all scaffolds. Furthermore, all scaffolds promoted significant upregulation of aggrecan and type II collagen gene expression while downregulating that of type I collagen. Compressive testing at physiological strain levels further demonstrated that the mechanical properties of trilaminar composite scaffolds approached those of native cartilage. Our results demonstrate that trilaminar composite scaffolds mimic key organizational characteristics of native cartilage, support in vitro cartilage formation, and have superior mechanical properties to homogenous scaffolds. We propose that these scaffolds offer promise in regenerative medicine strategies to repair articular cartilage lesions.
Keywords
Animals, Anisotropy, Biocompatible Materials/chemistry, Cartilage, Articular/cytology, Cattle, Cells, Cultured, Chondrocytes/cytology, Chondrocytes/metabolism, Chondrogenesis/physiology, Materials Testing, Microscopy, Electron, Scanning, Polyesters/chemistry, Tissue Engineering, Tissue Scaffolds/chemistry
Pubmed
Web of science
Create date
12/01/2024 11:14
Last modification date
13/01/2024 8:10
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