Short-Chain Fatty Acids in Periodontal Disease Dynamics

Short-chain fatty acids (SCFAs) are low-molecular-weight metabolites—principally acetate, propionate and butyrate—generated by proteolytic and anaerobic bacteria within the subgingival biofilm. Under physiological conditions, these bacterial fermentation products contribute to the maintenance of mucosal barrier integrity and local immune homeostasis. In the context of gingivitis and periodontitis, however, excessive SCFA accumulation is associated with a shift in the microbial ecosystem (dysbiosis) and with destructive host responses. High concentrations of butyrate and propionate induce apoptosis and cell-cycle arrest in gingival fibroblasts and osteoblasts, interfere with epithelial barrier function and alter the balance between receptor activator of nuclear factor κB ligand (RANKL) and osteoprotegerin (OPG), thereby promoting alveolar bone resorption. SCFAs also act as histone deacetylase inhibitors, modulate nuclear factor-κB signalling and engage the free fatty acid receptor 2 (FFAR2) on neutrophils, driving selective immune recruitment. Together, these mechanisms place SCFAs at the nexus of microbial metabolism, inflammatory signalling and tissue remodelling in periodontal disease. Growing interest surrounds their utility as biomarkers in gingival crevicular fluid and as targets for therapeutic modulation—either by influencing bacterial fermentation pathways or by intercepting host-receptor interactions—to arrest or reverse periodontal breakdown on a global scale.

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Short-Chain Fatty Acids in Periodontal Disease Dynamics publication trend

The graph below shows the total number of articles in short-chain fatty acids in periodontal disease dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Short-chain fatty acids (SCFAs): Bacterial fermentation products of two to six carbon atoms, notably acetate, propionate and butyrate, involved in local and systemic signalling.

Gingival crevicular fluid (GCF): Serum-derived exudate found in the gingival sulcus, used to sample host-microbial metabolites and inflammatory mediators.

Dysbiosis: Ecological imbalance of the microbial community, leading to pathological host responses.

Histone deacetylase (HDAC) inhibitor: A molecule that prevents removal of acetyl groups from histone proteins, thereby modifying gene expression.

Free fatty acid receptor 2 (FFAR2): A G-protein-coupled receptor on immune cells that recognises SCFAs and mediates chemotactic and inflammatory responses.

References

1. The interplay between gingival crevicular fluid microbiome and metabolomic profile in intensively treated people with type 1 diabetes - a combined metagenomic/metabolomic approach cross-sectional study. Frontiers in Endocrinology (2024).
2. The Complicated Relationship of Short-Chain Fatty Acids and Oral Microbiome: A Narrative Review. Biomedicines (2023).
3. Microbial metabolites in the pathogenesis of periodontal diseases: a narrative review. Frontiers in Oral Health (2023).
4. Butyrate Stimulates Histone H3 Acetylation, 8-Isoprostane Production, RANKL Expression, and Regulated Osteoprotegerin Expression/Secretion in MG-63 Osteoblastic Cells. International Journal of Molecular Sciences (2018).
5. Effect of Butyrate on Collagen Expression, Cell Viability, Cell Cycle Progression and Related Proteins Expression of MG-63 Osteoblastic Cells. PLOS ONE (2016).
6. Porphyromonas gingivalis Produce Neutrophil Specific Chemoattractants Including Short Chain Fatty Acids. Frontiers in Cellular and Infection Microbiology (2021).
7. Proof-of-Principle Study Suggesting Potential Anti-Inflammatory Activity of Butyrate and Propionate in Periodontal Cells. International Journal of Molecular Sciences (2022).