The oral microbiome of denture wearers is influenced by natural dentition

O’Donnell, L. E. et al. (2015) The oral microbiome of denture wearers is influenced by natural dentition. PLoS ONE, 10(9), e0137717. (doi: 10.1371/journal.pone.0137717) (PMID:26368937) (PMCID:PMC4569385)

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Objectives: The composition of dental plaque has been well defined, whereas currently there is limited understanding of the composition of denture plaque and how it directly influences denture related stomatitis (DS). The aims of this study were to compare the microbiomes of denture wearers, and to understand the implications of these towards inter-kingdom and host-pathogen interactions within the oral cavity. Methods: Swab samples were obtained from 123 participants wearing either a complete or partial denture; the bacterial composition of each sample was determined using bar-coded illumina MiSeq sequencing of the bacterial hypervariable V4 region of 16S rDNA. Sequencing data processing was undertaken using QIIME, clustered in Operational Taxonomic Units (OTUs) and assigned to taxonomy. The dentures were sonicated to remove the microbial flora residing on the prosthesis, sonicate was then cultured using diagnostic colorex Candida media. Samples of unstimulated saliva were obtained and antimicrobial peptides (AMP) levels were measured by ELISA. Results: We have shown that dental and denture plaques are significantly distinct both in composition and diversity and that the oral microbiome composition of a denture wearer is variable and is influenced by the location within the mouth. Dentures and mucosa were predominantly made up of Bacilli and Actinobacteria. Moreover, the presence of natural teeth has a significant impact on the overall microbial composition, when compared to the fully edentulous. Furthermore, increasing levels of Candida spp. positively correlate with Lactobacillus spp. AMPs were quantified, though showed no specific correlations. Conclusions: This is the first study to provide a detailed understanding of the oral microbiome of denture wearers and has provided evidence that DS development is more complex than simply a candidal infection. Both fungal and bacterial kingdoms clearly play a role in defining the progression of DS, though we were unable to show a defined role for AMPs.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Cross, Dr Laura and Sherriff, Dr Andrea and Ramage, Professor Gordon and Malcolm, Dr Jennifer and Riggio, Professor Marcello and Nile, Dr Christopher
Authors: O’Donnell, L. E., Roberston, D., Nile, C. J., Cross, L. J., Riggio, M., Sherriff, A., Bradshaw, D., Lambert, M., Malcolm, J., Buijs, M. J., Zaura, E., Crielaard, W., Brandt, B. W., and Ramage, G.
College/School:College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing > Dental School
Journal Name:PLoS ONE
Publisher:Public Library of Science
ISSN (Online):1932-6203
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in PLoS ONE 10(9):e0137717
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
614821The Natural History of Dentures: A Microbiological PerspectiveGordon RamageBiotechnology and Biological Sciences Research Council (BBSRC)BB/K501013/1SM - DENTAL SCHOOL