Caries-free subjects have high levels of urease and arginine deiminase activity
Objectives: This study investigated the relationship between urease and arginine deiminase system (ADS) activities and dental caries through a cross-sectional study. Material and Methods: Urease and ADS activities were measured in saliva and plaque samples from 10 caries-free subjects and 13 caries-active. Urease activity was obtained from the ammonia produced by incubation of plaque and saliva samples in urea. ADS activity was obtained from the ammonia generated by the arginine-HCl and Tris-maleate buffer. Specific activity was defined as micromoles of ammonia per minute per milligram of protein. Shapiro-Wilk statistical test was used to analyze the distribution of the data, and Mann-Whitney test was used to determine the significance of the data. Results: The specific urease activity in saliva and plaque was significantly higher in individuals with low DMFT scores. ADS activity in saliva (6.050 vs 1.350, p=0.0154) and plaque (8.830 vs 1.210, p=0.025) was also higher in individuals with low DMFT scores. Conclusions: Caries-free subjects had a higher ammonia generation activity by urease and arginine deiminase system for both saliva and plaque samples than low caries-active subjects. High levels of alkali production in oral environment were related to caries-free subjects.
Main Authors: | REYES,Evelyn, MARTIN,Javier, MONCADA,Gustavo, NEIRA,Miguel, PALMA,Patricia, GORDAN,Valeria, OYARZO,Juan Fernando, YEVENES,Ismael |
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Format: | Digital revista |
Language: | English |
Published: |
Faculdade De Odontologia De Bauru - USP
2014
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Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572014000300235 |
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