Open AccessA novel vertical aligned mesoporous silica coated nanohydroxyapatite particle as efficient dexamethasone carrier for potential application in osteogenesis
Author(s) -
Sen Jia,
Yan Liu,
Zhen Ma,
Changkui Liu,
Jinxiang Chai,
Zixia Li,
Wen Song,
Kaijin Hu
Publication year - 2021
Publication title -
biomedical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.744
H-Index - 72
eISSN - 1748-605X
pISSN - 1748-6041
DOI - 10.1088/1748-605x/abcae1
Subject(s) - materials science , mesoporous silica , mesoporous material , cytotoxicity , nanorod , in vivo , adsorption , nanoparticle , nanotechnology , regeneration (biology) , scanning electron microscope , biophysics , chemistry , biomedical engineering , chemical engineering , in vitro , biochemistry , organic chemistry , composite material , microbiology and biotechnology , medicine , biology , catalysis , engineering
Bone defect is a common problem and inducing osteoblasts differentiation is the key process for the regenerative repair. Recently, the mesoporous silica (MS) coated nanohydroxyapatite (nHA) particles (nHA-MS) has shown enhanced intrinsic potency for bone regeneration, whereas whether the osteogenesis potency can be further enhanced after drug delivery has not been investigated. In this study, the nHA-MS was fabricated by a novel biphase stratification growth way. The cytotoxicity in MC3T3-E1 was validated by MTT assay, apoptosis analysis and cell cycle examination. The cell uptake was observed by confocal laser scanning microscope and transmission electron microscope respectively. After adsorption with dexamethasone (DEX), the osteogenic differentiation was determined both in vitro and in vivo . The synthesized nHA-MS showed a core–shell structure that the nanorod-like nHA was coated by a porous MS shell (∼5 nm pores diameter, ∼50 nm thickness). A dose-dependent cytotoxicity was observed and below 10 µg ml −1 was a safe concentration. The nHA-MS also showed efficient cell uptake efficiency and more efficient in DEX loading and release. After DEX adsorption, the nanoparticles exhibited enhanced osteogenic induction in MC3T3-E1 and rat calvarial bone defect regeneration. In conclusion, the nHA-MS is a favorable platform for drug delivery to obtain more enhanced osteogenesis capabilities.