A nanocarrier system that potentiates the effect of miconazole within different interkingdom biofilms

Arias, L. S., Brown, J. L. , Butcher, M. C., Delaney, C., Monteiro, D. R. and Ramage, G. (2020) A nanocarrier system that potentiates the effect of miconazole within different interkingdom biofilms. Journal of Oral Microbiology, 12(1), 1771071. (doi: 10.1080/20002297.2020.1771071) (PMID:32922677) (PMCID:PMC7448886)

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Background: Novel and new therapeutic strategies capable of enhancing the efficacy of existing antimicrobials is an attractive proposition to meet the needs of society. Objective: This study aimed to evaluate the potentiating effect of a miconazole (MCZ) nanocarrier system, incorporated with iron oxide nanoparticles (IONPs) and chitosan (CS) (IONPs-CS-MCZ). This was tested on three representative complex interkingdom oral biofilm models (caries, denture and gingivitis). Materials and methods: The planktonic and sessile minimum inhibitory concentrations (MICs) of IONPs-CS-MCZ against different Candida albicans strains were determined, as well as against all represented bacterial species that formed within the three biofilm models. Biofilms were treated for 24 hours with the IONPs-CS nanocarrier system containing MCZ at 64 mg/L, and characterized using a range of bioassays for quantitative and qualitative assessment. Results MIC results generally showed that IONPs-CS-MCZ was more effective than MCZ alone. IONPs-CS-MCZ also promoted reductions in the number of CFUs, biomass and metabolic activity of the representative biofilms, as well as altering biofilm ultrastructure when compared to untreated biofilms. IONPs-CS-MCZ affected the composition and reduced the CFEs for most of the microorganisms present in the three evaluated biofilms. In particular, the proportion of streptococci in the biofilm composition were reduced in all three models, whilst Fusobacterium spp. percentage reduced in the gingivitis and caries models, respectively. Conclusion: In conclusion, the IONPs-CS-MCZ nanocarrier was efficient against three in vitro models of pathogenic oral biofilms, showing potential to possibly interfere in the synergistic interactions among fungal and bacterial cells within polymicrobial consortia.

Item Type:Articles
Additional Information:Funding: This work was supported by the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [#88881.188706/2018-01]; GlaxoSmithKline (GSK) [BB/P504567/1].
Glasgow Author(s) Enlighten ID:Butcher, Mark and Brown, Dr Jason and Ramage, Professor Gordon and Delaney, Christopher
Authors: Arias, L. S., Brown, J. L., Butcher, M. C., Delaney, C., Monteiro, D. R., and Ramage, G.
College/School:College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing > Dental School
Journal Name:Journal of Oral Microbiology
Publisher:Taylor & Francis
ISSN (Online):2000-2297
Published Online:07 June 2020
Copyright Holders:Copyright © 2020 The Author(s).
First Published:First published in Journal of Oral Microbiology 12(1): 1771071
Publisher Policy:Reproduced under a Creative Commons licence

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
173112Understanding processes and mechanisms affecting the oral microbiome using OMICs approachesGordon RamageBiotechnology and Biological Sciences Research Council (BBSRC)BB/P504567/1Med - Dental School