Journal of clinical periodontology · 2026
Shotgun Metagenomic Analysis Reveals Taxonomic and Functional Transitions in the Salivary Microbiome During Periodontal Disease Progression.
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Manzoor Muhammed, Leskelä Jaakko, Könönen Eija, Lahti Leo, Putaala Jukka, Pussinen Pirkko J, Paju Susanna
Аннотация
AIM: To characterise multi-kingdom salivary microbiome profiles across clinically defined periodontal states and identify stage-specific taxonomic and functional alterations using shotgun metagenomic sequencing.
MATERIALS AND METHODS: In this cross-sectional study, 204 adults (mean age 40.3 ± 7.6 years) from the SECRETO study (NCT01934725) underwent clinical and radiographic oral examinations and were classified into six periodontal groups: periodontal health, localised gingivitis, generalised gingivitis, gingivitis with pockets, mild periodontitis (Stages I-II) and severe periodontitis (Stages III-IV). Saliva samples were analysed using shotgun metagenomic sequencing to evaluate microbial diversity, taxonomic composition and functional pathways.
RESULTS: Beta diversity differed between periodontal health and the different disease states (Bray-Curtis: p = 0.049; Jaccard: p = 0.043). Gingivitis with pockets and severe periodontitis showed a significant enrichment of disease-associated species Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Porphyromonas endodontalis, Fusobacterium nucleatum and Parvimonas micra. Among non-bacterial taxa, Candida, Moineauvirus, Pyricularia and Roseolovirus were the predominant genera. A composite metagenomic classifier showed high discriminative performance for gingivitis with pockets (AUC = 0.90; 95% CI: 0.770-1.000) and severe periodontitis (AUC = 0.865; 95% CI: 0.762-0.968).
CONCLUSION: Salivary multi-kingdom microbiome transitions closely reflect the progression of periodontal disease and provide promising biomarkers for identifying at-risk individuals.
MATERIALS AND METHODS: In this cross-sectional study, 204 adults (mean age 40.3 ± 7.6 years) from the SECRETO study (NCT01934725) underwent clinical and radiographic oral examinations and were classified into six periodontal groups: periodontal health, localised gingivitis, generalised gingivitis, gingivitis with pockets, mild periodontitis (Stages I-II) and severe periodontitis (Stages III-IV). Saliva samples were analysed using shotgun metagenomic sequencing to evaluate microbial diversity, taxonomic composition and functional pathways.
RESULTS: Beta diversity differed between periodontal health and the different disease states (Bray-Curtis: p = 0.049; Jaccard: p = 0.043). Gingivitis with pockets and severe periodontitis showed a significant enrichment of disease-associated species Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Porphyromonas endodontalis, Fusobacterium nucleatum and Parvimonas micra. Among non-bacterial taxa, Candida, Moineauvirus, Pyricularia and Roseolovirus were the predominant genera. A composite metagenomic classifier showed high discriminative performance for gingivitis with pockets (AUC = 0.90; 95% CI: 0.770-1.000) and severe periodontitis (AUC = 0.865; 95% CI: 0.762-0.968).
CONCLUSION: Salivary multi-kingdom microbiome transitions closely reflect the progression of periodontal disease and provide promising biomarkers for identifying at-risk individuals.