Nanocrystalline diamond (NCD) films are promising materials for bone implant coatings because of their biocompatibility, chemical resistance, and mechanical hardness. Moreover, NCD wettability can be tailored by grafting specific atoms. The NCD films used in this study were grown on silicon substrates by microwave plasma-enhanced chemical vapor deposition and grafted by hydrogen atoms (H-termination) or oxygen atoms (O-termination). Human osteoblast-like Saos-2 cells were used for biological studies on H-terminated and O-terminated NCD films. The adhesion, growth, and subsequent differentiation of the osteoblasts on NCD films were examined, and the extracellular matrix production and composition were quantified. The osteoblasts that had been cultivated on the O-terminated NCD films exhibited a higher growth rate than those grown on the H-terminated NCD films. The mature collagen fibers were detected in Saos-2 cells on both the H-terminated and O-terminated NCD films; however, the quantity of total collagen in the extracellular matrix was higher on the O-terminated NCD films, as were the amounts of calcium deposition and alkaline phosphatase activity. Nevertheless, the expression of genes for osteogenic markers - type I collagen, alkaline phosphatase, and osteocalcin - was either comparable on the H-terminated and O-terminated films or even lower on the O-terminated films. In conclusion, the higher wettability of the O-terminated NCD films is promising for adhesion and growth of osteoblasts. In addition, the O-terminated surface also seems to support the deposition of extracellular matrix proteins and extracellular matrix mineralization, and this is promising for better osteoconductivity of potential bone implant coatings.

• Klíčová slova
• SHG, Saos-2, collagen, nanocrystalline diamond film, osteoblast,
• MeSH
• alkalická fosfatasa genetika   metabolismus   MeSH
• buněčná diferenciace * MeSH
• diamant chemie   MeSH
• extracelulární matrix metabolismus   MeSH
• fluorescenční protilátková technika MeSH
• kolagen typu I metabolismus   MeSH
• kvantitativní polymerázová řetězová reakce MeSH
• lidé MeSH
• mikroskopie atomárních sil MeSH
• mikroskopie elektronová rastrovací MeSH
• osteoblasty cytologie   metabolismus   MeSH
• proliferace buněk * MeSH
• Ramanova spektroskopie MeSH
• smáčivost MeSH
• tkáňové inženýrství * MeSH
• vápník metabolismus   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• alkalická fosfatasa MeSH
• diamant MeSH
• kolagen typu I MeSH
• vápník MeSH