Strontium substituted biomimetic calcium phosphate system derived from cuttlefish bone.
Antonia ResslerMatija CvetnićMaja AntunovićInga MarijanovićMarica IvankovićHrvoje IvankovićPublished in: Journal of biomedical materials research. Part B, Applied biomaterials (2019)
Biomimetic triphasic strontium-substituted calcium phosphate (CaP) powders were prepared by wet precipitation method at 50°C, using CaCO3 , (NH2 )2 COH3 PO4 , and Sr(NO3 )2 as reagents. Calcite was prepared from biogenic source (cuttlefish bone). The synthesized powders have been characterized by elemental analysis, Fourier transform infrared spectrometry, X-ray diffraction, Rietveld refinement studies and cell viability test. Phase transformation and ion release were analyzed during 7 days of incubation in simulated body fluid at 37°C. The raw precipitated powders were composed of calcium deficient carbonated hydroxyapatite (HA), octacalcium phosphate (OCP), and amorphous calcium phosphate (ACP). After heat treatment at 1200°C β-tricalcium phosphate (β-TCP) was detected. Strontium substitution for calcium results in an increase of lattice parameters in HA, OCP, and β-TCP. Sr2+ occupy the Ca(1) site in HA, Ca(3,4,7,8) sites in OCP and Ca(1,2,3,4) sites in β-TCP. Along with Sr2+ substitution, presence of Mg2+ and Na+ ions was detected as a result of using biogenic calcium carbonate. The culture of human embryonic kidney cells indicated noncytotoxicity of the prepared CaP powders with emphasis on the cell proliferation during 3 days of culture.
Keyphrases
- bone regeneration
- cell proliferation
- bone mineral density
- high resolution
- induced apoptosis
- endothelial cells
- molecular docking
- room temperature
- tissue engineering
- protein kinase
- bone loss
- magnetic resonance imaging
- body composition
- signaling pathway
- oxidative stress
- molecular dynamics simulations
- endoplasmic reticulum stress
- replacement therapy
- computed tomography
- electron microscopy
- pluripotent stem cells
- water soluble
- pi k akt
- cell death
- gas chromatography
- metal organic framework