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http://dx.doi.org/10.4014/mbl.1608.08010

Augmented Osteoclastogenesis from Committed Osteoclast Precursors by Periodontopathic Bacteria Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis

Park, Ok-Jin (Department of Oral Microbiology and Immunology, DRI and BK21 Plus Program, School of Dentistry)
Kwon, Yeongkag (Department of Oral Microbiology and Immunology, DRI and BK21 Plus Program, School of Dentistry)
Yun, Cheol-Heui (Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University)
Han, Seung Hyun (Department of Oral Microbiology and Immunology, DRI and BK21 Plus Program, School of Dentistry)

Publication Information

Microbiology and Biotechnology Letters / v.44, no.4, 2016 , pp. 557-562 More about this Journal

Abstract

Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis are gram-negative bacteria frequently found in lesions from patients with periodontitis manifesting alveolar bone loss. Lipopolysaccharides are a major virulence factor of gram-negative bacteria. Bone resorption is known to be regulated by bacteria and their virulence factors. In the present study, we investigated the effects of A. actinomycetemcomitans and P. gingivalis on bone resorption. Heat-killed A. actinomycetemcomitans (HKAa) and heatkilled P. gingivalis (HKPg) induced bone loss in the femurs of mice after intraperitoneal administration. HKAa and HKPg augmented the differentiation of committed osteoclast precursors into osteoclasts, while they inhibited the differentiation of bone marrow-derived macrophages into osteoclasts. Concordant with the effects of the heat-killed whole cells, LPS purified from A. actinomycetemcomitans and P. gingivalis also augmented osteoclast differentiation from committed osteoclast precursors but attenuated it from bone marrow-derived macrophages. Taken together, these results suggest that the whole cells and lipopolysaccharides of A. actinomycetemcomitans and P. gingivalis induce the differentiation of committed osteoclast precursors into osteoclasts, potentially contributing to bone resorption in vivo.

Keywords

Aggregatibacter actinomycetemcomitans; Porphyromonas gingivalis; lipopolysaccharide; osteoclast; bone loss;

Citations & Related Records

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