rEnolase Maternal Immunization Confers Caries Protection on Offspring

Abstract

Therapeutic vaccination with Streptococcus sobrinus recombinant enolase (rEnolase) protects rats from dental caries. Here, we investigated the effect that maternal rEnolase vaccination before pregnancy had on the offspring’s immune response to S. sobrinus oral infection and dental caries progression. Female Wistar rats were immunized by intranasal and subcutaneous routes with rEnolase adsorbed onto aluminum hydroxide as adjuvant or similarly treated with the adjuvant alone (sham-immunized). Ten days after the last administration, the immunized females were paired with a male rat. The oral immune responses to S. sobrinus infection and dental caries in the offspring were evaluated. The results showed that pups born from rEnolase-immunized mothers had higher levels of rEnolase-specific salivary IgA and IgG antibodies (indicating a placental antibody transfer) and lower sulcal and proximal enamel caries scores than rats born from sham-immunized mothers. In conclusion, rEnolase maternal immunization before pregnancy provides offspring with protection against S. sobrinus-induced dental caries.

Keywords

bacteria vaccine caries infection control mucosal immunity

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