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Updated: Jun 11, 2026

Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells

Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells

Published on: December 17, 2015

Porphyromonas gingivalis lipids inhibit osteoblastic differentiation and function.

Yu-Hsiung Wang¹, Jin Jiang, Qiang Zhu

¹Department of Craniofacial Sciences, University of Connecticut, School of Dental Medicine, Farmington, CT 06030, USA.

Infection and Immunity

|June 30, 2010

Summary

Porphyromonas gingivalis lipids inhibit osteoblast differentiation and function, impacting alveolar bone homeostasis. This Toll-like receptor 2-dependent mechanism affects gene expression and mineralized nodule formation in periodontal disease.

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Isolation, Processing and Analysis of Murine Gingival Cells

Isolation, Processing and Analysis of Murine Gingival Cells

Published on: July 2, 2013

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Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells

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Published on: December 17, 2015

Isolation, Processing and Analysis of Murine Gingival Cells

Isolation, Processing and Analysis of Murine Gingival Cells

Published on: July 2, 2013

Area of Science:

Microbiology
Immunology
Periodontology

Background:

Porphyromonas gingivalis produces sphingolipids that induce inflammation.
These lipids activate Toll-like receptor 2 (TLR2)-dependent inflammatory pathways.

Purpose of the Study:

To investigate the effect of P. gingivalis lipids on osteoblastic function.
To determine the mechanism by which these lipids influence bone homeostasis.

Main Methods:

Osteoblast cultures from mice were treated with P. gingivalis lipids.
Assays measured mineralized nodule formation, cell viability, proliferation, apoptosis, and gene expression.
In vivo studies assessed osteoblast differentiation reporter gene expression and mineral staining.

Main Results:

P. gingivalis lipids inhibited osteoblast differentiation and mineralized nodule formation in a concentration-dependent manner.
Osteoblast proliferation, viability, and apoptosis were not significantly affected.
Gene expression analysis revealed downregulation of osteoblast markers and upregulation of inflammatory and bone-resorbing factors.
Inhibition was dependent on Toll-like receptor 2 (TLR2) expression.

Conclusions:

P. gingivalis lipids inhibit osteoblast function and gene expression.
This represents a novel mechanism contributing to alveolar bone loss in periodontal disease.
TLR2 signaling is critical for the inhibitory effects of these lipids on osteoblasts.