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Induction of Periodontitis via a Combination of Ligature and Lipopolysaccharide Injection in a Rat Model
Published on: February 17, 2023
Tumor necrosis factor-α and Porphyromonas gingivalis lipopolysaccharides decrease periostin in human periodontal
Miguel Padial-Molina1, Sarah L Volk, Juan C Rodriguez
1Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI, USA.
Journal of Periodontology
|July 10, 2012
Summary
Inflammation and bacterial factors reduce periostin in periodontal ligament cells, potentially worsening periodontal disease. This study investigated periostin's role in maintaining ligament health.
Area of Science:
- Periodontal medicine
- Cell biology
- Biomaterials science
Background:
- Periostin is crucial for periodontal ligament (PDL) homeostasis.
- Its role in response to inflammatory stimuli is not fully understood.
Purpose of the Study:
- To investigate how periodontal disease factors affect periostin expression in PDL cells.
- To determine the impact of inflammatory cytokines and bacterial virulence factors on periostin.
Main Methods:
- Human PDL cells were cultured and exposed to tumor necrosis factor-α (TNF-α), Porphyromonas gingivalis lipopolysaccharides (LPS), or both.
- Cells were subjected to mechanical challenges for 24 hours, 4 days, and 7 days.
- Periostin and βIGH3 mRNA and protein levels were analyzed using RT-qPCR and Western blotting; immunofluorescence was used for localization.
Main Results:
- Mechanical loading enhanced periostin matrix incorporation.
- Chronic exposure to TNF-α and/or P. gingivalis LPS significantly reduced periostin protein levels in mechanically loaded cultures.
- βIGH3 expression showed high variability with no clear pattern.
Conclusions:
- Proinflammatory mediators like TNF-α and bacterial factors such as P. gingivalis LPS decrease periostin expression in human PDL fibroblasts.
- Altered periostin expression may contribute to the progression of periodontal disease.
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