Chemical and Immunobiological Characterization of Lipopolysaccharides from Prevotella intermedia and Prevotella nigrescens.
10.5051/jkape.2004.34.2.461
- Author:
Sung Jo KIM
1
Author Information
1. Department of Periodontology, College of Dentistry, Pusan National University, Korea.
- Publication Type:Original Article
- Keywords:
Prevotella intermedia;
Prevotella nigrescens;
Lipopoplysaccharide;
B-cell mitogenicity;
Nitric oxide;
iNOS;
TNF-alpha
- MeSH:
Animals;
Blotting, Western;
Coloring Agents;
Enzyme-Linked Immunosorbent Assay;
Lipopolysaccharides*;
Mice;
Nitric Oxide;
Periodontal Diseases;
Prevotella intermedia*;
Prevotella nigrescens*;
Prevotella*;
Reverse Transcription;
Spleen;
Tumor Necrosis Factor-alpha
- From:The Journal of the Korean Academy of Periodontology
2004;34(2):461-474
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to assess some biological activities of lipopolysaccharides (LPSs) from P. intermedia and P. nigrescens. LPS was prepared by the standard hot phenol-water method. NO production was assayed by measuring the accumulation of nitrite in culture supernatants. TNF-alpha production was determined by enzyme-linked immunosorbent assay. Western blot analysis of iNOS and analysis of reverse transcription (RT)-PCR products were carried out. LPS from P. intermedia demonstrated higher KDO content than those from two stains of P. nigrescens. LPSs from P. intermedia and P. nigrescens were mitogenic for spleen cells of BALB/C mouse. The present study clearly shows that LPSs from P. intermedia and P. nigrescens fully induced iNOS expression and NO production in RAW264.7 cells in the absence of other stimuli. Moreover, LPSs from P. intermedia and P. nigrescens clearly induced TNF-alpha production in RAW264.7 cells. The biological activities of LPS from P. intermedia was found to be comparable to those of P. nigrescens LPS. The ability of LPSs from P. intermedia and P. nigrescens to promote the production of NO and TNF-alpha may be important in the pathogenesis of inflammatory periodontal disease.
