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Microbial differences between dental plaque and historic dental calculus are related to oral biofilm maturation stage.

Abstract：

BACKGROUND:Dental calculus, calcified oral plaque biofilm, contains microbial and host biomolecules that can be used to study historic microbiome communities and host responses. Dental calculus does not typically accumulate as much today as historically, and clinical oral microbiome research studies focus primarily on living dental plaque biofilm. However, plaque and calculus reflect different conditions of the oral biofilm, and the differences in microbial characteristics between the sample types have not yet been systematically explored. Here, we compare the microbial profiles of modern dental plaque, modern dental calculus, and historic dental calculus to establish expected differences between these substrates. RESULTS:Metagenomic data was generated from modern and historic calculus samples, and dental plaque metagenomic data was downloaded from the Human Microbiome Project. Microbial composition and functional profile were assessed. Metaproteomic data was obtained from a subset of historic calculus samples. Comparisons between microbial, protein, and metabolomic profiles revealed distinct taxonomic and metabolic functional profiles between plaque, modern calculus, and historic calculus, but not between calculus collected from healthy teeth and periodontal disease-affected teeth. Species co-exclusion was related to biofilm environment. Proteomic profiling revealed that healthy tooth samples contain low levels of bacterial virulence proteins and a robust innate immune response. Correlations between proteomic and metabolomic profiles suggest co-preservation of bacterial lipid membranes and membrane-associated proteins. CONCLUSIONS:Overall, we find that there are systematic microbial differences between plaque and calculus related to biofilm physiology, and recognizing these differences is important for accurate data interpretation in studies comparing dental plaque and calculus.

journal_name

Microbiome

journal_title

Microbiome

authors

Velsko IM,Fellows Yates JA,Aron F,Hagan RW,Frantz LAF,Loe L,Martinez JBR,Chaves E,Gosden C,Larson G,Warinner C

doi

10.1186/s40168-019-0717-3

subject

Has Abstract

pub_date

2019-07-06 00:00:00

pages

102

issue

1

issn

2049-2618

pii

10.1186/s40168-019-0717-3

journal_volume

7

pub_type

历史文章,杂志文章

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