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  • Title: Synthetic antigen-binding fragments (Fabs) against S. mutans and S. sobrinus inhibit caries formation.
    Author: Alam MK, Zheng L, Liu R, Papagerakis S, Papagerakis P, Geyer CR.
    Journal: Sci Rep; 2018 Jul 05; 8(1):10173. PubMed ID: 29976956.
    Abstract:
    Streptococcus mutans and Streptococcus sobrinus are the main causative agents of human dental caries. Current strategies for treating caries are costly and do not completely eradicate them completely. Passive immunization using nonhuman antibodies against Streptococcal surface antigens has shown success in human trials, however they often invoke immune reactions. We used phage display to generate human antigen-binding fragments (Fabs) against S. mutans and S. sobrinus. These Fabs were readily expressed in E. coli and bound to the surface S. mutans and S. sobrinus. Fabs inhibited sucrose-induced S. mutans and S. sobrinus biofilm formation in vitro and a combination of S. mutans and S. sobrinus Fabs prevented dental caries formation in a rat caries model. These results demonstrated that S. mutans and S. sobrinus Fabs could be used in passive immunization strategies to prevent dental caries. In the future, this strategy may be applied towards a caries therapy, whereby Fabs are topically applied to the tooth surface.
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