Imprinted contact lenses for sustained release of polymyxin B and related antimicrobial peptides

Malakooti, Negin, Alexander, Cameron and Alvarez-Lorenzo, Carmen (2015) Imprinted contact lenses for sustained release of polymyxin B and related antimicrobial peptides. Journal of Pharmaceutical Sciences, 104 (10). pp. 3386-3394. ISSN 1520-6017

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The aim of this work was to develop drug-soft contact lens combination products suitable for controlled release of antimicrobial peptides on the ocular surface. Incorporation of functional monomers and the application of molecular imprinting techniques were explored to endow 2-hydroxyethyl methacrylate (HEMA) hydrogels with the ability to load and to sustain the release of polymyxin B and vancomycin. Various HEMA–drug–functional monomer–cross–linker molar ratios were evaluated to prepare polymyxin B imprinted and non-imprinted hydrogels. Acrylic acid-functionalized and imprinted hydrogels loaded greater amounts of polymyxin B and led to more sustained release profiles, in comparison with non-functionalized and non-imprinted networks. Polymyxin B-loaded hydrogels showed good biocompatibility in hen’s egg test-chorioallantoic membrane tests. Functionalized hydrogels also loaded vancomycin and sustained its release, but the imprinting effect was only exhibited with polymyxin B, as demonstrated in rebinding tests. Microbiological assays carried out with Pseudomonas aeruginosa allowed identification of the most suitable hydrogel composition for efficient bacteria eradication; some hydrogels being able to stand several continued challenges against this important bacterial pathogen.

Item Type: Article
Keywords: Hydrogels; Biomaterials; Controlled release; Peptide delivery; Mucosal delivery; Drug-device combination product; Molecular imprinting; Ophthalmic drug delivery; Contact lens; Pseudomonas aeruginosa
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Pharmacy
Identification Number:
Depositing User: Eprints, Support
Date Deposited: 30 Nov 2016 13:39
Last Modified: 04 May 2020 17:18

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