Innate immunity glycoprotein gp-340 variants may modulate human susceptibility to dental caries

被引:34
作者
Jonasson, Anette
Eriksson, Christer
Jenkinson, Howard F.
Kallestal, Carina
Johansson, Ingegerd
Stromberg, Nicklas [1 ]
机构
[1] Umea Univ, Dept Odontol Cariol, SE-90187 Umea, Sweden
[2] Univ Bristol, Dept Oral & Dent Sci, Bristol, Avon, England
[3] Uppsala Univ, Dept Womens & Childrens Hlth, IMCH, Uppsala, Sweden
基金
英国惠康基金;
关键词
D O I
10.1186/1471-2334-7-57
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Background: Bacterial adhesion is an important determinant of colonization and infection, including dental caries. The salivary scavenger receptor cysteine-rich glycoprotein gp-340, which mediates adhesion of Streptococcus mutans (implicated in caries), harbours three major size variants, designated gp-340 I to III, each specific to an individual saliva. Here we have examined the association of the gp-340 I to III polymorphisms with caries experience and adhesion of S. mutans. Methods: A case-referent study was performed in 12-year-old Swedish children with high (n = 19) or low (n = 19) caries experiences. We measured the gp-340 I to III saliva phenotypes and correlated those with multiple outcome measures for caries experience and saliva adhesion of S. mutans using the partial least squares (PLS) multivariate projection technique. In addition, we used traditional statistics and 2-year caries increment to verify the established PLS associations, and bacterial adhesion to purified gp-340 I to III proteins to support possible mechanisms. Results: All except one subject were typed as gp-340 I to III (10, 23 and 4, respectively). The gp-340 I phenotype correlated positively with caries experience (VIP = 1.37) and saliva adhesion of S. mutans Ingbritt (VIP = 1.47). The gp-340 II and III phenotypes tended to behave in the opposite way. Moreover, the gp-340 I phenotype tended to show an increased 2-year caries increment compared to phenotypes II/III. Purified gp-340 I protein mediated markedly higher adhesion of S. mutans strains Ingbritt and NG8 and Lactococcus lactis expressing AgI/II adhesins (SpaP or PAc) compared to gp-340 II and III proteins. In addition, the gp-340 I protein appeared over represented in subjects positive for Db, an allelic acidic PRP variant associated with caries, and subjects positive for both gp-340 I and Db tended to experience more caries than those negative for both proteins. Conclusion: Gp-340 I behaves as a caries susceptibility protein.
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页数:8
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