Biphasic composite of calcium phosphate-based mesoporous silica as a novel bone drug delivery system

Magdalena Prokopowicz , Adrian Szewczyk , Adrianna Skwira , Rafał Sądej , Gavin Walker


We reported the new biphasic composites of calcium phosphate and mesoporous silica material (CaP@MSi) in the form of powders and pellets as a potential bone drug delivery system for doxycycline hydrochloride (DOX). The CaP@MSi powders were synthesized by cationic surfactant-templating method. The effects of 10, 20, and 30% CaP content in the CaP@MSi powders on the molecular surface structure, the cytotoxicity against osteoblast cells in vitro, and the mineralization potential in simulated body fluid were investigated. The CaP@MSi characterized by the highest mineralization potential (30% CaP content) were used for DOX adsorption and pelletization process. The CaP which precipitated in the CaP@MSi composites was characterized as calcium-deficient with the Ca:P molar ratio between 1.0 and 1.2. The cytotoxicity assays demonstrated that the CaP content in MSi increases osteoblasts viability indicating the CaP@MSi (30% CaP content) as the most biocompatible. The combination of CaP and MSi was an effective strategy to improve the mineralization potential of parent material. Upon immersion in simulated body fluid, the CaP of composite converted into the bone-like apatite. The obtained pellets preserved the mineralization potential of CaP@MSi and provided the prolonged 5-day DOX release. The obtained biphasic CaP@MSi composites seem to have an application potential as bone-specific drug delivery system.
Publication typeIn press (online first, early view)
Author Magdalena Prokopowicz
Magdalena Prokopowicz,,
, Adrian Szewczyk
Adrian Szewczyk,,
, Adrianna Skwira
Adrianna Skwira,,
, Rafał Sądej (IFB / DMedB)
Rafał Sądej,,
- Department of Medical Biotechnology
, Gavin Walker
Gavin Walker,,
Journal seriesDrug Delivery and Translational Research, ISSN 2190-393X, e-ISSN 2190-3948, (N/A 100 pkt)
Issue year2020
Noonline first
Publication size in sheets0.75
Keywords in EnglishDrug delivery, mesoporous silica, hydroxyapatite, doxycycline
ASJC Classification3003 Pharmaceutical Science
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 07-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.823; WoS Impact Factor: 2018 = 3.111 (2) - 2018=3.345 (5)
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