Native fibrillar collagen membranes of micron-scale and submicron thicknesses for cell support and perfusion.
Biomaterials
; 26(10): 1109-17, 2005 Apr.
Article
em En
| MEDLINE
| ID: mdl-15451630
ABSTRACT
Fibrillar type I collagen is nontoxic, biocompatible, and possesses considerable strength and stability. In a study of scaffolds for use in laminated tissue substitutes, we examined the properties of membranes made from air-dried hydrogels of collagen fibrils that were polymerized from native, monomeric collagen. Planar collagen membranes (CMs) of 0.1-5.3 microm dry thickness were made by variation of the collagen concentration and/or the volume of the hydrogel. The planar CMs, which were comprised of a dense feltwork of long collagen fibrils 70-100 nm in diameter, showed considerable resistance to rupture and retained their membranous character after 6 weeks in tissue culture medium at 37 degrees C. CMs that were relatively thick when dry exhibited a greater proportional increase in rehydrated thickness and a greater diffusivity (when rehydrated) to 4.3 kDa dextran than did CMs that were relatively thin when dry. Hollow, tubular CMs of several configurations were prepared by embedment of solid, removable forms into collagen hydrogels prior to drying. By use of special fixtures, a planar CM that incorporated multiple, parallel tubes was fabricated. In summary, hydrogels of fibrillar collagen can be transformed into membranous structures suitable for tissue engineering applications.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Técnicas de Cultura de Células
/
Colágeno Tipo I
/
Engenharia Tecidual
/
Nanotecnologia
/
Membranas Artificiais
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
Biomaterials
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Estados Unidos
País de publicação:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS