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Peri-implantitis fibroblasts respond to host immune factor C1q
S Verardi1, M Quaranta, S Bordin
1Department of Periodontics, University of Washington, Seattle, WA 98195-7444, USA.
Journal of Periodontal Research
|November 27, 2010
Summary
Peri-implantitis fibroblasts exhibit distinct C1q receptor expression and inflammatory responses compared to periodontitis fibroblasts. These findings suggest peri-implantitis fibroblasts may represent a novel subtype influencing disease progression.
Area of Science:
- Immunology
- Cell Biology
- Oral Medicine
Background:
- Current peri-implantitis therapies mirror periodontitis treatments, yet yield unpredictable outcomes.
- Fibroblasts, key regulators of inflammation, exhibit heterogeneity and influence disease.
- Understanding fibroblast subtypes is crucial for targeted peri-implantitis treatment.
Purpose of the Study:
- To characterize complement C1q receptor expression on human peri-implantitis fibroblasts.
- To investigate the effects of C1q on the proinflammatory properties of these cells.
- To compare peri-implantitis fibroblasts with those from periodontitis and healthy tissues.
Main Methods:
- Fibroblasts were cultured from human gingival tissues with peri-implantitis, periodontitis, and healthy controls.
- Complement C1q receptor expression (cC1qR, gC1qR) was analyzed via flow cytometry.
- Secretion of inflammatory mediators (IL-6, IL-8, MCP-1, VEGF, TGF-β1) was quantified using ELISAs after C1q stimulation.
Main Results:
- Peri-implantitis fibroblasts showed higher cC1qR and lower gC1qR expression compared to periodontitis fibroblasts.
- C1q stimulation significantly increased IL-6, IL-8, and MCP-1 secretion in peri-implantitis and healthy fibroblasts, but not in periodontitis fibroblasts.
- C1q markedly elevated VEGF and TGF-β1 in peri-implantitis fibroblasts, indicating enhanced angiogenic and fibrogenic potential.
Conclusions:
- Peri-implantitis fibroblasts exhibit unique phenotypic and functional characteristics compared to periodontitis and healthy fibroblasts.
- These fibroblasts display altered C1q receptor expression and heightened proinflammatory, angiogenic, and fibrogenic responses.
- Peri-implantitis fibroblasts may constitute a distinct cellular subtype contributing to disease pathogenesis.
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