Electrophoretic deposition of dexamethasone-loaded gelatin nanospheres/chitosan coating and its dual function in anti-inflammation and osteogenesis

Colloids and Surfaces. B, Biointerfaces
Hongfei QiTingli Lu

Abstract

Surface modification of metallic implants with bioactive and biodegradable coatings could be a promising approach for bone regeneration. The objective of this study was to prepare chitosan/gelatin nanospheres (GNs) composite coating for the delivery of dexamethasone (DEX). GNs with narrow size distribution and negative surface charge were firstly prepared by a two-step desolvation method. Homogeneous and stable gelatin nanospheres/chitosan (GNs/CTS) composite coatings were formed by electrophoretic deposition (EPD). Drug loading, encapsulation efficiency and in vitro release of DEX were estimated using high performance liquid chromatography (HPLC). The anti-inflammatory effect of DEX-loaded coatings on macrophage RAW 264.7 cells was assessed by the secretion of tumour necrosis factor (TNF) and inducible nitric oxide synthase (iNOS). Osteogenic differentiation of MC3T3-E1 osteoblasts on DEX-loaded coatings was investigated by osteogenic gene expression and mineralization. The DEX in GNs/CTS composite coating showed a two-stage release pattern could not only suppress inflammation during the burst release period, but also promote osteogenic differentiation in the sustained release period. This study might offer a feasible method f...Continue Reading

Citations

Jun 2, 2020·Therapeutic Delivery·Ishwor PoudelR Jayachandra Babu
Dec 2, 2020·Materials Science & Engineering. C, Materials for Biological Applications·Da-Wang ZhaoChao Liu
Oct 15, 2020·Advanced Healthcare Materials·Eloïse LebaudyVarvara Gribova
Feb 5, 2019·ACS Applied Materials & Interfaces·Hongfei QiTingli Lu

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