Patients with type 2 diabetes and severe periodontitis harbor a less pathogenic subgingival biofilm than normoglycemic individuals with severe periodontitis.

BACKGROUND If, and to what extent, diabetes mellitus (DM) can affect the subgingival biofilm composition remain controversial. Thus, the aim of this study was to compare the composition of the subgingival microbiota of non-diabetic and type 2 diabetic patients with periodontitis using 40 "biomarker bacterial species". METHODS Biofilm samples of shallow (probing depth (PD) and clinical attachment level (CAL) ≤ 3mm without bleeding) and deep sites (PD and CAL ≥ 5mm) of patients with or without type 2 DM were evaluated for levels/proportions of 40 bacterial species by checkerboard DNA-DNA hybridization. RESULTS Eight hundred and twenty eight subgingival biofilm samples from 207 patients with periodontitis (118 normoglycemic and 89 with type 2 DM) were analyzed. The levels of most of the bacterial species evaluated were reduced in the diabetic than in the normoglycemic group, both in shallow and in deep sites. The shallow and deep sites of patients with type 2 DM presented higher proportions of Actinomyces species, purple and green complexes, and lower proportions of red complex pathogens than those of normoglycemic patients (p<0.05). CONCLUSIONS Patients with type 2 DM have a less dysbiotic subgingival microbial profile than normoglycemic patients, including lower levels/proportions of pathogens and higher levels/proportions of host-compatible species. Thus, type 2 diabetic patients seem to require less remarkable changes in biofilm composition than non-diabetic patients to develop the same pattern of periodontitis. This article is protected by copyright. All rights reserved.

• Publication year

  2023

• Venue

  The Journal of Periodontology

• Publication date

  2023-05-03

• Fields of study

  Medicine

• Identifiers
  DOI 10.1002/JPER.22-0657PMID 37133975
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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