The Effect of Spironolactone on the Pathogenesis of Ligatureinduced Alveolar Bone Loss in Wistar Rats

  • G N Verzeletti Post-graduate Program in Dentistry, Lutheran University of Brazil
  • E J Gaio Department of Conservative Dentistry, Federal University of Rio Grande do Sul
  • C K Rösing Post-graduate Program in Dentistry, Lutheran University of Brazil and Department of Conservative Dentistry, Federal University of Rio Grande do Sul

Abstract

Tumor necrosis factor (TNF) is a pro-inflammatory cytokine that has a straight relationship with tissue  destruction in the pathogenesis of periodontitis. Inhibitory effects of TNF production have been attributed  to spironolactone. The aim of this study was to evaluate the effect of spironolactone on the pathogenesis of  ligature-induced alveolar bone loss in rats. Experimental periodontitis was induced in 38 Wistar rats by ligature  placement in the left second maxillary molar. The contra-lateral maxillary molar served as intragroup  control. Animals were randomly divided into 4 groups and treated with spironolactone (50, 100, 200  mg·kg-1) or saline. Morphometrical registration of maxillary alveolar bone was performed after 28 days of  experimental periodontitis. Intra-group comparisons showed significantly higher alveolar bone loss mean  values in maxillary sides with ligature (paired sample t test, p<0.05). Mean alveolar bone loss was not significantly  different between groups, independently of the dosage (range: 0.63 – 0.66 mm, one-way  ANOVA, p>0.05). Although spironolactone has recognized TNF-inhibitory properties, the possibility of its  use on modulation of host immune-inflammatory response in periodontal disease was not confirmed. 

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