| Title | Influence of crystallite size of nanophased hydroxyapatite on fibronectin and osteonectin adsorption and on MC3T3-E1 osteoblast adhesion and morphology |
| Publication Type | Journal Article |
| 2010 |
| Authors | Ribeiro, N, Sousa, SR, Monteiro, FJ |
| Journal | Journal of Colloid and Interface ScienceJ. Colloid Interface Sci. |
| Volume | 351 |
| Issue | 2 |
| Pagination | 398 - 406 |
| Date Published | 2010/// |
| 00219797 (ISSN) |
| Adhesion, Adhesive proteins, Adsorption, Adsorption behavior, Animals, Apatite, article, Bioceramics, Biological materials, Biomaterials, bone development, Bone Regeneration, cell adhesion, Cell Count, cell metabolism, cell motility, Cell number, cell proliferation, cell strain 3T3, cell structure, Cell-binding domain, Cells, Cultured, cellular distribution, ceramics, controlled study, Crystallite dimension, Crystallite size, Crystallization, Durapatite, Fibronectin, Fibronectin adsorption, Fibronectins, glycoprotein, grain, Grain size, human, human cell, hydroxyapatite, Hydroxyapatite nanocrystals, MC3T3-E1, Metabolic activity, metabolism, Mice, morphology, Nano-HA, nanocrystal, nanoparticles, Nanophased hydroxyapatite, osteoblast, Osteoblast adhesion, Osteoblast morphology, Osteoblasts, Osteogenesis, osteonectin, Osteonectin adsorption, Particle Size, porosity, priority journal, protein, Proteins, Root mean square roughness, Sintering, Sintering temperatures, Surface area, Surface Properties, surface property, Surface roughness, temperature, Topographical features |
| The characteristic topographical features (crystallite dimensions, surface morphology and roughness) of bioceramics may influence the adsorption of proteins relevant to bone regeneration. This work aims at analyzing the influence of two distinct nanophased hydroxyapatite (HA) ceramics, HA725 and HA1000 on fibronectin (FN) and osteonectin (ON) adsorption and MC3T3-E1 osteoblast adhesion and morphology. Both substrates were obtained using the same hydroxyapatite nanocrystals aggregates and applying the sintering temperatures of 725°C and 1000°C, respectively. The two proteins used in this work, FN as an adhesive glycoprotein and ON as a counter-adhesive protein, are known to be involved in the early stages of osteogenesis (cell adhesion, mobility and proliferation). The properties of the nanoHA substrates had an important role in the adsorption behavior of the two studied proteins and clearly affected the MC3T3-E1 morphology, distribution and metabolic activity. HA1000 surfaces presenting slightly larger grain size, higher root-mean-square roughness (Rq), lower surface area and porosity, allowed for higher amounts of both proteins adsorbed. These substrates also revealed increased number of exposed FN cell-binding domains as well as higher affinity for osteonectin. Regarding the osteoblast adhesion results, improved viability and cell number were found for HA1000 surfaces as compared to HA725 ones, independently of the presence or type of adsorbed protein. Therefore the osteoblast adhesion and metabolic activity seemed to be more sensitive to surfaces morphology and roughness than to the type of adsorbed proteins. © 2010 Elsevier Inc. |
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