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A reproducible microcosm biofilm model of subgingival microbial communities
Author(s) -
Fernandez y Mostajo M.,
Exterkate R. A. M.,
Buijs M. J.,
Beertsen W.,
van der Weijden G. A.,
Zaura E.,
Crielaard W.
Publication year - 2017
Publication title -
journal of periodontal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.31
H-Index - 83
eISSN - 1600-0765
pISSN - 0022-3484
DOI - 10.1111/jre.12473
Subject(s) - biofilm , microbiology and biotechnology , fusobacterium nucleatum , fusobacterium , veillonella , biology , periodontitis , prevotella intermedia , porphyromonas gingivalis , bacteroides , dentistry , bacteria , medicine , streptococcus , genetics
Objective To develop a reproducible subgingival microcosm biofilm model. Material and Methods Subgingival plaque samples were collected from four deep pockets ( probing pocket depth ≥6 mm) in each of seven patients with periodontitis and from shallow pockets ( probing pocket depth ≤3 mm) in two periodontally healthy donors. An active attachment model and a peptone medium (Thompson et. al., Appl Environ Microbiol 2015;81:8307–8314) supplemented with 30% serum was used. Biofilms were harvested at 2 and 4 weeks. DNA of dead cells was blocked for amplification by propidium monoazide treatment. Composition was analyzed using 16S rRNA gene amplicon pyrosequencing. Similarities between the biofilm samples were assessed by non‐metric multidimensional scaling using the Bray‐Curtis similarity index and similarity percentage analysis. Data from duplicate experiments, different biofilm sources and different biofilm age were compared. Results The non‐metric multidimensional scaling revealed a strong clustering by the inoculum source, the donor and their periodontal status. Statistically significant differences were found between the sources of inoculum ( P =.0001) and biofilm age ( P =.0016). Furthermore, periodontitis biofilms (P) were distinct in composition from health‐derived biofilms (H) by genera: Porphyromonas (P=19%; H=0%), Filifactor (P=10%; H=0%), Anaeroglobus (P=3%; H=0%), Phocaeicola (P=1.5%; H=0%), Parvimonas (P=19%; H=14%), Fusobacterium (P=2%; H=26%), Peptostreptococcus (P=20%; H=30%), Veillonella (P=7%; H=8%) and 57 other genera. Similarity distances ( Bray‐Curtis ) (mean 0.73, SD 0.15) and the Shannon diversity index (mean 2, SD 0.2) revealed no differences between duplicate experiments ( P =.121). Conclusion This biofilm model allows reproducible production of complex subgingival microbial communities.