Experimental Models of Periodontal Disease Mechanisms

Understanding the complex interplay between microbial challenge, host immune response and tissue destruction in periodontitis relies on diverse experimental systems. In vitro assays of human periodontal ligament cells and stem cell populations permit detailed exploration of inflammatory signalling pathways, matrix degradation and osteogenic potential. Ex vivo organotypic cultures of periodontal tissue further bridge the gap between monolayer studies and intact physiology. In vivo models encompass ligature‐induced periodontitis in rodents, which simulates biofilm accumulation and inflammatory bone resorption, as well as bacterial inoculation models that focus on defined pathogens. Genetic and transgenic mice facilitate dissection of gene function in host defence and osteoclast regulation. More recently, humanised mouse systems engrafting human immune cells have begun to recapitulate human‐specific immunopathogenic networks. Collectively, these approaches have revealed critical mediators of alveolar bone loss, identified novel targets for modulating osteoclastogenesis and advanced strategies for periodontal regeneration under controlled experimental settings.

Research from Nature Portfolio

Recent studies have elucidated the role of erythropoietin receptor (EPOR) signalling in periodontal ligament stem cells (PDLSCs). Investigations in chronic periodontitis patients and healthy donors revealed that reduced EPOR expression in diseased PDLSCs correlates with diminished regenerative capacity. Activation of EPOR by erythropoietin restored osteogenic marker expression and enhanced paracrine support for bone‐forming osteoblasts while suppressing osteoclast activity. In a murine ligature‐induced periodontitis model, transplantation of EPOR‐activated PDLSCs into gingival tissues promoted regeneration of the periodontal ligament, cementum and alveolar bone. These findings establish EPOR signalling as a pivotal mechanism for stem cell–based periodontal repair and guide development of cell‐therapies for clinical application.

Experimental Models of Periodontal Disease Mechanisms publication trend

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

Technical terms

Ligature‐induced periodontitis model: An in vivo method where sutures are placed around teeth to accumulate bacteria and trigger periodontal inflammation and bone loss.

Periodontal ligament stem cells (PDLSCs): Multipotent mesenchymal cells residing in the periodontal ligament capable of differentiating into osteoblasts, cementoblasts and fibroblasts for tissue regeneration.

Erythropoietin receptor (EPOR) signalling: A pathway through which erythropoietin binds to its receptor on stem cells, modulating inflammation, osteogenesis and paracrine immune regulation.

Osteoclastogenesis: The process of differentiation and activation of osteoclasts, the bone‐resorbing cells central to alveolar bone loss in periodontitis.

Humanised mouse model: An immunodeficient rodent engrafted with human haematopoietic or immune cells to recapitulate human‐specific immune responses in vivo.

References

1. A modified method for constructing experimental rat periodontitis model. Frontiers in Bioengineering and Biotechnology (2023).
2. Erythropoietin receptor signal is crucial for periodontal ligament stem cell-based tissue reconstruction in periodontal disease. Scientific Reports (2024).
3. Application of Ligature-Induced Periodontitis in Mice to Explore the Molecular Mechanism of Periodontal Disease. International Journal of Molecular Sciences (2021).
4. Humanized Mouse Models for the Study of Periodontitis: An Opportunity to Elucidate Unresolved Aspects of Its Immunopathogenesis and Analyze New Immunotherapeutic Strategies. Frontiers in Immunology (2021).