Oral bacterial DNAs in synovial fluids of arthritis patients

• Published in: Microbial ecology in health and disease 2005-04, Vol.17 (1), p.2-8
• Main Authors: Moen, Ketil, Brun, Johan G., Eribe, Emenike R.K., Olsen, Ingar, Jonsson, Roland
• Format: Article
• Language: English
• Subjects: Actinobacillus actinomycetemcomitans; Actinomyces israelii; bacterial DNA; Eubacterium saburreum; oral infections; Prevotella intermedia; Prevotella melaninogenica; rheumatoid arthritis; Streptococcus anginosus; Streptococcus intermedius; synovial fluid
• ISSN: 0891-060X; 1651-2235; 1651-2235
• DOI: 10.1080/08910600510031394

Arthritis may be triggered by microbial constituents, more specifically, bacterial cell wall fragments, or bacterial DNA. The aim of this study was to analyze the amount of oral bacterial DNA in synovial fluids (SF) of arthritis patients. SF from 15 rheumatoid arthritis (RA) patients, 15 arthritides (non-RA) patients and 9 osteoarthritis (control) patients were extracted for oral bacterial DNA. DNA was used in a checkerboard DNA-DNA hybridization set-up, in order to identify 40 different species. The mean number±standard deviation (SD) of bacterial species in SF was 22.7 (5.6) in the RA group and 13.1 (3.9) in the control group (p=0.001). The mean number of species found in non-RA SF was 19.7 (7.8), (p=0.033). The qualitative differences in species between the groups were most notable for Actinobacillus actinomycetemcomitans, Eubacterium saburreum, Streptococcus anginosus, Actinomyces israelii, Streptococcus intermedius, Tannerella forsythensis, Prevotella melaninogenica and Prevotella intermedia. DNAs from these species were exclusively detected in RA SF and in non-RA SF. In RA SF, 33% of the species were found in high (≥106 cells per 100 μl) concentrations compared with 13.4% in the control group (p=0.001). In non-RA SF, 38.3% of the species were found in high concentrations (p