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Title: Engineering Biocoatings To Prolong Drug Release from Supraparticles
Authors: Ma, Yutian
Cortez-Jugo, Christina
Li, Jianhua
Lin, Zhixing
Richardson, Rachael
Han, Yiyuan
Zhou, Jiajing
Björnmalm, Mattias
Feeney, Orlagh
Zhong, Qi-Zhi
Porter, Christopher
Wise, Andrew
Caruso, Frank
Issue Date: Aug-2019
Publisher: American Chemical Society
Citation: Ma, Y., C. Cortez-Jugo, J. Li, Z. Lin, R. T. Richardson, Y. Han, J. Zhou, M. Bjornmalm, O. M. Feeney, Q. Z. Zhong, C. J. H. Porter, A. K. Wise, and F. Caruso. 2019. Engineering Biocoatings To Prolong Drug Release from Supraparticles. Biomacromolecules: [epub ahead of print].
Abstract: Supraparticles (SPs) assembled from smaller colloidal nanoparticles can serve as depots of therapeutic compounds and are of interest for long-term, sustained drug release in biomedical applications. However, a key challenge to achieving temporal control of drug release from SPs is the occurrence of an initial rapid release of the loaded drug (i.e., "burst" release) that limits sustained release and potentially causes burst release-associated drug toxicity. Herein, a biocoating strategy is presented for silica-SPs (Si-SPs) to reduce the extent of burst release of the loaded model protein lysozyme. Specifically, Si-SPs were coated with a fibrin film, formed by enzymatic conversion of fibrinogen into fibrin. The fibrin-coated Si-SPs, (F)Si-SPs, which could be loaded with 7.9 +/- 0.9 mug of lysozyme per SP, released >60% of cargo protein over a considerably longer period of time of >20 days when compared with the uncoated Si-SPs that released the same amount of the cargo protein, however, within the first 3 days. Neurotrophins that support the survival and differentiation of neurons could also be loaded at approximately 7.3 mug per SP, with fibrin coating also delaying neurotrophin release (only 10% of cargo released over 21 days compared with 60% from Si-SPs). In addition, the effects of incorporating a hydrogel-based system for surgical delivery and the opportunity to control drug release kinetics were investigated-an alginate-based hydrogel scaffold was used to encapsulate (F)Si-SPs. The introduction of the hydrogel further extended the initial release of the encapsulated lysozyme to approximately 40 days (for the same amount of cargo released). The results demonstrate the increasing versatility of the SP drug delivery platform, combining large loading capacity with sustained drug release, that is tailorable using different modes of controlled delivery approaches.
URI: http://repository.bionicsinstitute.org:8080/handle/123456789/361
ISSN: 1525-7797
Appears in Collections:Other research publications

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