Periodontitis and Endotoxemia: Clinical and Microbiological Insights.
Level 4 - case-series / case-control
Cross-sectional observational study comparing biomarkers and microbiota across disease states
PubMed 42242289 · doi:10.1111/jcpe.70148
What was done
Researchers evaluated 270 participants with gingivitis and periodontitis from the SECRETO Oral cohort to investigate the link between periodontal dysbiosis and systemic endotoxemia. Lipopolysaccharide (LPS) activity in serum and subgingival plaque was quantified using the recombinant Factor C assay. Subgingival microbiota were profiled using 16S rRNA sequencing. Associations between clinical variables, the subgingival microbial dysbiosis index (SMDI), and taxonomic abundance were evaluated using multivariate regression and MaAsLin2 models adjusted for clinical and demographic covariates. Microbial functional pathways were predicted using PICRUSt2.
What was found
Serum LPS activity was significantly higher in patients with periodontitis than in those with gingivitis and correlated positively with SMDI. Subgingival LPS activity was also significantly elevated in periodontitis and strongly associated with bacterial load and SMDI. Subgingival LPS explained 10% of the variation in serum LPS. Differential abundance analysis identified Fretibacterium as positively associated with both subgingival and serum LPS activities. Predicted functional pathways showed enrichment in bacterial motility and invasion pathways and depletion in host defense functions. Numerical values and exact p-values were not reported in the abstract.
Why it matters
This study provides clinical evidence linking subgingival microbial dysbiosis and specific taxa to circulating LPS activity, supporting the periodontal pocket as an active source of systemic endotoxemia.
Limits
The cross-sectional design cannot establish causality between periodontal infection and systemic endotoxemia. Subgingival LPS explained only 10% of serum LPS variation, indicating that other systemic sources account for the remaining 90%. Functional pathways were computationally inferred rather than directly sequenced, and the abstract omitted exact biomarker concentrations and effect size confidence intervals.
Cited by
- contradicts LPS in the human body originates exclusively from the gut.