Relationship between the IgA antibody response against Streptococcus mutans GbpB and severity of dental caries in childhood

• Autor(a) principal: Colombo, Natália Helena [UNESP]
• Data de Publicação: 2016
• Outros Autores: Pereira, Jesse Augusto [UNESP], Da Silva, Márjully Eduardo Rodrigues [UNESP], Ribas, Laís Fernanda Fonseca [UNESP], Parisotto, Thaís Manzano, Mattos-Graner, Renata De Oliveira, Smith, Daniel J., Duque, Cristiane [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.archoralbio.2016.03.006; http://hdl.handle.net/11449/172763
• topic: Early childhood caries; Glucan binding proteins; Imunoglobulin A; S. mutans

Objective Explore the associations between the severity of dental caries in childhood, mutans streptococci (MS) levels and IgA antibody response against Streptococcus mutans GbpB. Moreover, other caries-related etiological factors were also investigated. Design 36-60 month-old children were grouped into Caries-Free (CF, n = 19), Early Childhood Caries (ECC, n = 17) and Severe Early Childhood Caries (S-ECC, n = 21). Data from socio-economic-cultural status, oral hygiene habits and dietary patterns were obtained from a questionnaire and a food-frequency diary filled out by parents. Saliva was collected from children for microbiological analysis and detection of salivary IgA antibody reactive with S. mutans GbpB in western blot. Results S-ECC children had reduced family income compared to those with ECC and CF. There was difference between CF and caries groups (ECC and S-ECC) in MS counts. Positive correlations between salivary IgA antibody response against GbpB and MS counts were found when the entire population was evaluated. When children with high MS counts were compared, S-ECC group showed significantly lower IgA antibody levels to GbpB compared to CF group. This finding was not observed for the ECC group. Conclusions This study suggests that children with S-ECC have reduced salivary IgA immune responses to S. mutans GbpB, potentially compromising their ability to modify MS infection and its cariogenic potential. Furthermore, a reduced family income and high levels of MS were also associated with S-ECC.