Oxidative Stress Mechanisms in Periodontal Disease

Periodontal disease arises from a complex interplay between microbial challenge and host immune responses. Central to its progression is oxidative stress, defined by an excess of reactive oxygen species (ROS) relative to antioxidant defences. In periodontitis, hyperactive neutrophils release copious ROS that damage gingival connective tissue and alveolar bone. Redox‐sensitive signalling pathways, including nuclear factor‐κB (NF-κB) and the NLRP3 inflammasome, amplify pro-inflammatory cytokine production and matrix degradation. Conversely, the transcription factor NRF2 governs the expression of cytoprotective enzymes that restore redox homeostasis. Impairment of this antioxidant armature exacerbates lipid peroxidation, DNA damage and collagen breakdown, driving attachment loss. The global burden of periodontitis, linked to systemic conditions such as diabetes and cardiovascular disease, has spurred investigation of redox‐targeted diagnostics and adjuvant antioxidant therapies to preserve periodontal health and limit tissue destruction.

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Oxidative Stress Mechanisms in Periodontal Disease publication trend

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

Technical terms

Oxidative stress: Imbalance between production of reactive oxygen species and the capacity of antioxidant systems, leading to molecular and cellular damage.

Reactive oxygen species (ROS): Chemically reactive molecules, including superoxide and hydrogen peroxide, generated by activated neutrophils and mitochondrial metabolism.

NRF2/KEAP1 signalling: A redox‐sensitive transcriptional pathway in which NRF2 promotes antioxidant gene expression when released from its inhibitor KEAP1.

Lipid peroxidation: Oxidative degradation of lipids, yielding reactive aldehydes that compromise cell membranes and stimulate inflammation.

8-Hydroxy-2′-deoxyguanosine (8-OHdG): A stable marker of oxidative DNA damage frequently measured in saliva or serum to assess redox imbalance.

Nuclear factor-κB (NF-κB): A transcription factor activated by ROS that orchestrates expression of pro-inflammatory cytokines and enzymes involved in tissue breakdown.

References

1. Modulation of NRF2/KEAP1 Signaling by Phytotherapeutics in Periodontitis. Antioxidants (2024).
2. Silibinin Attenuates Experimental Periodontitis by Downregulation of Inflammation and Oxidative Stress. Oxidative Medicine and Cellular Longevity (2023).
3. Using 8-Hydroxy-2′-Deoxiguanosine (8-OHdG) as a Reliable Biomarker for Assessing Periodontal Disease Associated with Diabetes. International Journal of Molecular Sciences (2024).