title: Growth and phenotypic expression of human endothelial cells cultured on a glass-reinforced hydroxyapatite.
abstract: Glass-reinforced hydroxyapatite composites (GR-HA) are bone regenerative materials that are characterized by their increased mechanical properties, when compared to synthetic hydroxyapatite. Bonelike is a GR-HA that is a result of the addition of a CaO-P(2)O(5) based glass to a HA matrix. This biomaterial has been successfully applied in clinical bone regenerative applications. This work aims to evaluate the ability of Bonelike to support the adhesion, proliferation and phenotypic expression of human endothelial cells, aiming to establish new bone tissue engineering pre-endothelialization strategies. Bonelike discs, regardless of being submitted to a pre-immersion treatment with culture medium, were seeded with first passage human umbilical vein endothelial cells, and characterized regarding proliferation and differentiation events. Pre-immersed Bonelike allowed the adhesion, proliferation and phenotype expression of endothelial cells. Seeded materials presented positive immunofluorescent staining for PECAM-1 and a tendency for the formation of cord-like arrangements under angiogenesis-stimulating conditions, although, compared to standard culture plates, a slight decreased cell growth was observed. In this way, Bonelike may be a suitable candidate for pre-endothelialization approaches in bone tissue engineering applications.
authors.affiliation: Cooperativa de Ensino Superior Egas Moniz, Monte de Caparica, Portugal.
authors.forename: J M
authors.initials: JM
authors.lastname: Silva Marques
authors.forename: P S
authors.initials: PS
authors.lastname: Gomes
authors.forename: M A
authors.initials: MA
authors.lastname: Silva
authors.forename: A M
authors.initials: AM
authors.lastname: Silvério Cabrita
authors.forename: J D
authors.initials: JD
authors.lastname: Santos
authors.forename: M H
authors.initials: MH
authors.lastname: Fernandes
mesh_terms: D018786:Bone Substitutes / Q000737:chemistry*; D002448:Cell Adhesion; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D017886:Durapatite / Q000737:chemistry*; D042783:Endothelial Cells / Q000166:cytology* / Q000378:metabolism*; D005898:Glass; D006801:Humans; D008422:Materials Testing; D018919:Neovascularization, Physiologic; D010641:Phenotype; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000378:metabolism; D023822:Tissue Engineering
chemical_list: D018786:Bone Substitutes; D019408:Platelet Endothelial Cell Adhesion Molecule-1; D017886:Durapatite