Supplementation of collagen scaffolds with SPARC to facilitate mineralization

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Pataquiva Mateus, AY (Autor) Outra; Wu, HC (Autor) Outra; Lucchesi, C (Autor) Outra; Ferraz, MP (Autor) Outra; Fernando Mendes Monteiro (Autor) FEUP; Spector, M (Autor) Outra

Revista

Título: Journal of Biomedical Materials Research - Part B Applied Biomaterials

Vol. 100B

Páginas: 862-870

ISSN: 1552-4973

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 13 Citações

ISI Web of Science

Scopus - 14 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-002-BMG

DOI: 10.1002/jbm.b.32650

Abstract (EN): The extracellular matrix-associated protein, SPARC (Secreted Protein Acidic and Rich in Cysteine) is known to play a role in the mineralization of collagen in bone formation. The objectives of this study were to determine: 1) if SPARC supplementation of type 1 collagen scaffolds in vitro facilitated the binding of pre-formed HA nanoparticles added to the scaffolds; 2) if SPARC supplementation of the scaffolds enhanced the uptake of calcium and phosphorus from calcium phosphate solutions; and 3) if pretreatment in a calcium phosphate solution enhanced the subsequent binding of the nanoparticles. A related objective was to begin to determine the behavior of mesenchymal stem cells in the scaffolds when the constructs were grown in osteogenic medium. The calcium and phosphorus contents of the scaffolds were evaluated by inductively coupled plasma analysis, and the elastic modulus of the scaffolds determined by unconfined compression testing. Scaffolds were seeded with goat bone marrow-derived mesenchymal stem cells and the cell-seeded constructs grown in osteogenic medium. Supplementation of the scaffolds with as little as 0.008 % SPARC (by wt. of collagen) resulted in an increase in the binding of hydroxyapatite nanoparticles to the scaffold, but had no effect on incorporation of calcium or phosphorus from a calcium phosphate solution. The incorporation of hydroxyapatite nanoparticles into the scaffolds did not result in an increase in modulus. Supplementation of the scaffolds with SPARC and the increase in the binding of hydroxyapatite nanoparticles did not affect the proliferation of mesenchymal stem cells. (C) 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: article first published online: 25 JAN 2012 DOI: 10.1002/jbm.b.32650

Nº de páginas: 9