Proteínas salivares como biomarcadores para cárie dentária

• Autor(a) principal: Guedes, Sarah Florindo de Figueiredo
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/11795
• topic: Cárie Dentária; Saliva; Proteínas

The number of studies that correlate salivary proteins and dental caries have incre ased considerably, however, there is not sufficient evidence to classify them as specific biomarkers for the disease. The aim of the study was to conduct a comparative analysis of saliva proteins of patients with early childhood caries (CPI) at different l evels of severity, in order to identify specific potential salivary biomarkers for diagnosis of this pathology. Methodology: 1) electronic search was performed in PubMed Medline database by applying the terms " carie " and "protein and salivary peptides." On e hundred and twenty studies were identified and 10 selected for review; 2) One hundred twenty - six children (24 - 71 months old) were selected. The children were examined in accordance with the visual index ICDAS II and divided into 3 groups (n = 42): Group caries - free (CF) (ICDAS 0), Group enamel caries ( EC ) (ICDAS 1, 2 and 3) and Group caries dentin ( DC ) (ICDAS 5 and 6). Then, the saliva was collected, processed and stored. The samples were digested and analyzed for mass spectrometry alter native multiplexed scanning (MSE ) . Analyses were perform ed with TransOmics Software, ANOVA and Volcano plot v - plot (p<0.05). Results: 1) n inety percent out of articles showed a relationship between salivary proteins and th e presence or absence of caries; 2) three hundred one proteins were identified and quantified, among them, 122 proteins were statis tically significant different at least in one group 84 were identified in all 3 groups ; o ne protein was expressed only in CF and other in EC ; 11 were expressed only in CF and EC , 15 in CF and DC , 10 in EC and DC . Of the 122 proteins, 54 proteins were at least 5 times more expressed in the comparison between the groups and were considered as candidates for biomarkers. From these 54, 1 8 proteins with potential mechanism of action r elated to dental caries were selected and analyzed . Conclusion : The relationship between salivary proteins and the presence or absence of caries is notorious and is already established. In this study, 18 proteins showed a relationship with t he CPI, and SAA 1, AIMP1, IL36A, IL36G and CAH1 have a greater potential to be considered biomarkers of dental caries. However, longitudinal studies have yet to be performed in order to establish the role of each protein studied and consolidate its role as a biomarker.