Abstract
Gentle extraction of oral bacteria implicated in the pathogenesis of periodontal disease, Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, or Eikenella corrodens, with saline removes the extracellular components while leaving the bacteria intact. This readily-solubilized surface-associated material (SAM) has been demonstrated to significantly inhibit DNA and collagen synthesis by murine calvaria at concentrations as low as 10 ng/ml. DNA and collagen synthesis in isolated calvarial osteoblasts were also inhibited by these SAM preparations with similar dose responses. The inhibitory effect of these bacterial expolymers was blocked by 1 microM indomethacin. The potent inhibitory actions on bone synthesis of the SAM from these bacteria may contribute to the alveolar bone loss found in patients with periodontal disease.
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