Inflammasome Activation in Periodontal Disease

Inflammasome activation represents a central mechanism in the innate immune response to periodontal pathogens and host-derived stress signals. These cytosolic multiprotein complexes assemble in gingival and periodontal ligament cells, and in infiltrating macrophages, in response to microbial components such as lipopolysaccharide and danger-associated molecular patterns. Canonical inflammasomes—most notably the NLRP3 complex—activate caspase-1, which in turn drives maturation of interleukin-1β and interleukin-18. Concurrently, cleavage of gasdermin D pores in the cell membrane initiates pyroptotic cell death, releasing pro-inflammatory mediators that amplify local inflammation and recruit further immune cells. Non-canonical pathways involving caspase-11 (in mice) or caspase-4/5 (in humans) detect cytosolic lipopolysaccharide and similarly induce pyroptosis and cytokine release. Excessive or prolonged inflammasome activity disrupts the balance between osteoclast-mediated bone resorption and osteoblast-mediated bone formation, leading to alveolar bone loss characteristic of periodontitis. Beyond oral health, dysregulated inflammasome signalling in the periodontium has been implicated in systemic conditions such as diabetes and rheumatoid arthritis. Deciphering the molecular controls of inflammasome assembly, its regulation by autophagy and metabolic cues, and its impact on tissue integrity is crucial for the development of targeted interventions that preserve periodontal architecture and prevent chronic inflammatory sequelae.

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Inflammasome Activation in Periodontal Disease publication trend

The graph below shows the total number of articles in inflammasome activation in periodontal disease across all publications each year (not limited to Nature Index journals).

Technical terms

Inflammasome: A cytosolic multiprotein complex that recognises pathogenic or stress signals and activates inflammatory caspases.

Pyroptosis: A lytic form of programmed cell death mediated by gasdermin D pore formation and associated with pro-inflammatory cytokine release.

NLRP3: A pattern-recognition receptor that nucleates the canonical inflammasome complex in response to diverse danger signals.

Caspase-1 and Caspase-11: Inflammatory cysteine proteases; caspase-1 processes IL-1β and IL-18, while caspase-11 (mice) or caspase-4/5 (humans) senses cytosolic lipopolysaccharide.

Gasdermin D: A pore-forming substrate cleaved by inflammatory caspases to execute membrane rupture during pyroptosis.

Interleukin-1β (IL-1β): A potent pro-inflammatory cytokine matured by caspase-1 and released upon inflammasome activation.

References

1. Caspase-11 mediated inflammasome activation in macrophages by systemic infection of A. actinomycetemcomitans exacerbates arthritis. International Journal of Oral Science (2024).
2. An ATP-responsive metal–organic framework against periodontitis via synergistic ion-interference-mediated pyroptosis. National Science Review (2024).
3. Hyperglycemia Aggravates Periodontitis via Autophagy Impairment and ROS-Inflammasome-Mediated Macrophage Pyroptosis. International Journal of Molecular Sciences (2023).