3D Bioplotter Research Papers
Comparison of the osteoblastic activity conferred on Si-doped hydroxyapatite scaffolds by different osteostatin coatings
Parathyroid hormone-related protein (107-111) (osteostatin) induces osteogenic effects in osteoblasts in vitro and in regenerating bone in mice and rabbits. In this study we used osteoblastic MC3T3-E1 cell cultures to evaluate and compare the bioactivity of this peptide either adsorbed or covalently bound (by its C-terminus) to Si-doped hydroxyapatite (Si-HA) scaffolds after organic (-NH2) functionalization. By these means osteostatin can be locally released or kept anchored to the scaffold surface. This was confirmed by chemical analysis and by testing the efficiency of osteostatin-loaded Si-HA scaffolds (placed in Transwell chambers) in healing a scratch wound in mouse pluripotent mesenchymal C3H10T1/2 cells….
Preparation of 3-D scaffolds in the SiO2–P2O5 system with tailored hierarchical meso-macroporosity
Herein we report for the first time the synthesis of three-dimensional scaffolds in the binary system SiO2–P2O5 exhibiting different scales of porosity: (i) highly ordered mesopores with diameters of ca. 4 nm; (ii) macropores with diameters in the 30–80 μm range with interconnections of ca. 2–4 and 8–9 μm; and (iii) ultra-large macropores of ca. 400 μm. The hierarchical porosity of the resulting scaffolds makes them suitable for bone tissue engineering applications. The chemical nature and mesoporosity of these matrices would allow these scaffolds to act as local controlled delivery systems of biologically active molecules, such as certain drugs to…