@misc{10481/81546,
year = {2023},
month = {5},
url = {https://hdl.handle.net/10481/81546},
abstract = {Objectives: To evaluate the effect of doxycycline and dexamethasone doped nanoparticles covering titanium
surfaces, on osteoblasts proliferation and differentiation.
Methods: Doxycycline and dexamethasone doped polymeric nanoparticles were applied on titanium discs (Ti-
DoxNPs and Ti-DexNPs). Undoped NPs and uncovered Ti discs were used as control. Human MG-63 osteoblast-
like cells were cultured. Osteoblasts proliferation was tested by MTT assay. Alkaline phosphatase activity was
analyzed. Differentiation gene expression was assessed by real-time quantitative polymerase chain reaction.
Scanning Electron Microscopy was performed to assess osteoblasts morphology. Mean comparisons were con-
ducted by ANOVA and Wilcoxon or Tukey tests (p < 0.05).
Results: No differences in osteoblasts proliferation were found. Osteoblasts grown on Ti-DoxNPs significantly
increased alkaline phosphatase activity. Doxycycline and dexamethasone nanoparticles produced an over-ex-
pression of the main osteogenic proliferative genes (TGF-β1, TGF-βR1 and TGF-βR2). The expression of Runx-2
was up-regulated. The osteogenic proteins (AP, OSX and OPG) were also overexpressed on osteoblasts cultured
on Ti-DoxNPs and Ti-DexNPs. The OPG/RANKL ratio was the highest when DoxNPs were present (75-fold in-
crease with respect to the control group). DexNPs also produced a significantly higher OPG/RANKL ratio with
respect to the control (20 times higher). Osteoblasts grown on titanium discs were mainly flat and polygonal in
shape, with inter-cellular connections. In contrast, osteoblasts cultured on Ti-DoxNPs or Ti-DexNPs were found
to be spindle-shaped and had abundant secretions on their surfaces.
Significance: DoxNPs and DexNPs were able to stimulate osteoblasts differentiation when applied on titanium
surfaces, being considered potential inducers of osteogenic environment when performing regenerative proce-
dures around titanium dental implants.},
organization = {Grant PID2020–114694RB-I00 funded by MCIN/AEI 10.13039/501100011033},
organization = {FPU of Ministry of Universities grant
FPU20/0045},
organization = {Klockner S.A. for financial
support and for providing the titanium discs},
publisher = {Elsevier},
keywords = {Titanium},
keywords = {Nanoparticles},
keywords = {Osteoblasts},
keywords = {Osteogenic},
keywords = {Dexamethasone},
keywords = {Doxycycline},
keywords = {Polymers},
title = {Dexamethasone and doxycycline functionalized nanoparticles enhance osteogenic properties of titanium surfaces},
doi = {10.1016/j.dental.2023.05.004},
author = {Toledano Osorio, Manuel and Luna Bertos, María Elvira De and Toledano Pérez, Manuel and Manzano Moreno, Francisco Javier and Costela Ruiz, Víctor Javier and Ruiz Rodríguez, Concepción and Gil, Javier and Osorio Ruiz, Raquel},
}