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Sustained release of VH and rhBMP-2 from nanoporous magnesium–zinc–silicon xerogels for osteomyelitis treatment and bone repair

Authors Li Fengqian, Wu W, Xiang L, Weng G, Hong H, Jiang H, Qian J, Zhao L, Hou J, Xie Y

Received 9 February 2015

Accepted for publication 28 March 2015

Published 22 June 2015 Volume 2015:10(1) Pages 4071—4080


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Editor who approved publication: Dr Lei Yang

Fengqian Li,1,* Wen Wu,2,* Li Xiang,1 Gan Weng,1 Hua Hong,3 Hong Jiang,4 Jun Qian3

1Department of Pharmacy, Shanghai Xuhui Dahua Hospital, 2Department of Orthopaedics, Ninth People’s Hospital, School of Medicine, Shanghai Jiaotong University, 3Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, 4School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, People’s Republic of China

*Co-first authors contributed equally to this work

Abstract: Nanoporous magnesium–zinc–silicon (n-MZS) xerogels with a pore size of ~4 nm, a surface area of 718 cm2/g, and a pore volume of 1.24 cm3/g were synthesized by a sol–gel method. The n-MZS xerogels had high capacity to load vancomycin hydrochloride (VH) and human bone morphogenetic protein-2 (rhBMP-2), after soaking in phosphate buffered saline (PBS) for 24 hours (1.5 and 0.8 mg/g, respectively). Moreover, the n-MZS xerogels exhibited the sustained release of VH and rhBMP-2 as compared with magnesium–zinc–silicon (MZS) xerogels without nanopores (showing a burst release). The VH/rhBMP-2/n-MZS system not only exhibited a good antibacterial property but also promoted the MG63 cell proliferation and differentiation demonstrating good bactericidal activity and cytocompatibility. The results suggested that n-MZS with larger surface area and high pore volume might be a promising carrier for loading and sustained release of VH and rhBMP-2. Hence, the VH/rhBMP-2/n-MZS system might be one of the promising biomaterials for osteomyelitis treatment and bone repair.

Keywords: nanoporous xerogels, sustained release, drugs, osteomyelitis, bone regeneration, bactericidal activity, cytocompatibility

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