SciELO - Scientific Electronic Library Online

 
vol.31Does the trait anxiety affect the dental fear?Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Brazilian Oral Research

On-line version ISSN 1807-3107

Abstract

BERTOLDO, Barbara Bellocchio et al. Comparisons of IgA response in saliva and colostrum against oral streptococci species. Braz. oral res. [online]. 2017, vol.31, e39.  Epub May 15, 2017. ISSN 1807-3107.  https://doi.org/10.1590/1807-3107bor-2017.vol31.0039.

The present study compared IgA specificity against oral streptococci in colostrum and saliva samples. Sixty-two mother-and-child pairs were included; samples of colostrum (C) and saliva (MS) were collected from the mothers and saliva samples were collected from babies (BS). The specificity of IgA against Streptococcus mutans and S. mitis were analyzed by western blot. Only 30% of babies’ samples presented IgA reactivity to S. mutans, while 74 and 80% of MS and C, respectively, presented this response. IgA reactivity to S. mutans virulence antigens (Ag I/II, Gtf and GbpB) in positive samples showed differences between samples for Gtf and especially for GbpB (p < 0.05), but responses to Ag I/II were similar (p > 0.05). The positive response of Gtf-reactive IgA was different between C (90%) and MS (58%) samples (p < 0.05), but did not differ from BS (p > 0.05). GbpB was the least detected, with 48 and 26% of C and MS, and only 5% of BS samples presenting reactivity (p > 0.05). Eight percent of MS and C samples presented identical bands to SM in the same time-point. In conclusion, the differences of IgA response found between C and MS can be due to the different ways of stimulation, proliferation and transportation of IgA in those secretions. The colostrum has high levels of IgA against S. mutans virulence antigens, which could affect the installation and accumulation process of S. mutans, mainly by supplying anti-GbpB IgA to the neonate.

Keywords : Streptococcus mutans; Colostrum; Saliva; Immunoglobulin A.

        · text in English     · English ( pdf )