Objective:

To investigate the influence of salivary microbiota associated with periodontitis on bone metabolism in a mouse model of osteoporosis.

Key Findings:

• Periodontitis group exhibited greater microbial diversity and enrichment of periodontal pathogens.
• Mice receiving periodontitis-associated microbiota showed lower bone mineral density and deteriorated trabecular architecture.
• Increased osteoclast numbers were observed in mice exposed to periodontitis-associated microbiota.
• Fecal microbiota transplantation from periodontitis mice reproduced bone loss in recipient mice.
• Reduced levels of indole-3-lactic acid (ILA) were found in mice exposed to periodontitis-associated microbiota.

Interpretation:

The study suggests a link between oral health and systemic bone metabolism, highlighting the potential role of gut microbiota and metabolites in bone loss associated with periodontitis.

Limitations:

• Limited clinical sample size.
• Need for further studies to investigate underlying mechanisms.

Conclusion:

Targeting gut microbial metabolism may provide new preventive and therapeutic strategies for patients suffering from both periodontal disease and osteoporosis.