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Type: Journal article
Title: Surface engineering of porous silicon to optimise therapeutic antibody loading and release
Author: McInnes, S.
Turner, C.
Al-Bataineh, S.
Airaghi Leccardi, M.
Irani, Y.
Williams, K.
Cowin, A.
Voelcker, N.
Citation: Journal of Materials Chemistry B, 2015; 3(20):4123-4133
Publisher: Royal Society of Chemistry
Issue Date: 2015
ISSN: 2050-750X
Statement of
Steven J.P. McInnes, Chris T. Turner, Sameer A. Al-Bataineh, Marta J.I. Airaghi Leccardi, Yazad Irani, Keryn A. Williams, Allison J. Cowin and Nicolas H. Voelcker
Abstract: The proinflammatory cytokine, tumor necrosis factor-α (TNF-α), is elevated in several diseases such as uveitis, rheumatoid arthritis and non-healing chronic wounds. Adding Infliximab, a chimeric IgG1 monoclonal antibody raised against TNF-α, to chronic wound fluid can neutralise human TNF-α, thereby providing a potential therapeutic option for chronic wound healing. However, to avoid the need for repeated application in a clinical setting, and to protect the therapeutic antibody from the hostile environment of the wound, suitable delivery vehicles are required. Porous silicon (pSi) is a biodegradable high surface area material commonly employed for drug delivery applications. In this study, the use of pSi microparticles (pSi MPs) for the controlled release of Infliximab to disease environments, such as chronic wounds, is demonstrated. Surface chemistry and pore parameters for Infliximab loading are first optimised in pSi films and loading conditions are transferred to pSi MPs. Loading regimens exceeding 60 μg of Infliximab per mg of pSi are achieved. Infliximab is released with zero-order release kinetics over the course of 8 days. Critically, the released antibody remains functional and is able to sequester TNF-α over a weeklong timeframe; suitable for a clinical application in chronic wound therapy.
Rights: This journal is © The Royal Society of Chemistry 2015
DOI: 10.1039/c5tb00397k
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