Methods: Sprague-Dawley rats were orally infected with Pg FDC 381, Td ATCC 35404, and Tf ATCC 43037 strains for 4 days consecutively every other week for 12 weeks. A mixture of 109 cells (Pg 3.3X108+Td 3.3108+Tf 3.3X108) mixed with 4% carboxymethylcellulose was administered orally. Bis-enoxacin (5, 25mg/kg), enoxacin (25 mg/kg), alendronate (1, 2.5mg/kg), and doxycycline (5mg/day) were administered subcutaneously after 6 weeks of polymicrobial infection. Periodontal disease parameters were assessed (oral plaque, serum antibody, gingival inflammation, and ABR). Systemic infection of heart, aorta, spleen, liver, lungs and kidneys with periodontal pathogens was also examined by PCR.
Results: Pg, Td and Tf genomic DNA were detected in oral plaque and also in systemic tissues of polymicrobal infected rats, indicating oral colonization and bacteremia, respectively. Polymicrobial infected rats elicited significantly higher levels of IgG antibodies than the sham-infected control and treatment with enoxacin and bis-enoxacin resulted in even higher antibody levels. Polymicrobial infection induced an increase in total ABR and intrabony defects while treatment with enoxacin and bis-enoxacin significantly decreased the incidence of both compared to infected and untreated controls. Preliminary histologic examination reveals enhanced gingival inflammation in infected rats and a decrease in apical migration and inflammation in bis-enoxacin and enoxacin treated rats.
Conclusions: This is the first study examining anti-osteoclastic effects of bis-enoxacin, enoxacin, and alendronate in a polymicrobial periodontal disease model.
Keywords: Animal, Bis-enoxacin, Immune response, Periodontal disease and Periodontal organisms
See more of: Periodontal Research - Pathogenesis