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Author(s): Marcia Dinis
Delfina Tavares
Isabel Veiga Malta
Antonio J M M Fonseca
Elva Bonifacio Andrade
Gabriela Trigo
Adilia Ribeiro
Amaldo Videira
Antonio M S Silverio Cabrita
Paula Ferreira
Title: Oral Therapeutic Vaccination with Streptococcus sobrinus Recombinant Enolase Confers Protection against Dental Caries in Rats
Issue Date: 2009
Abstract: Dental caries is among the more prevalent chronic human infections for which an effective human vaccine has not yet been achieved. Enolase from Streptococcus sobrinus has been identified as an immunomodulatory protein. In the present study, we used S. sobrinus recombinant enolase (rEnolase) as a target antigen and assessed its therapeutic effect in a rat model of dental caries. Wistar rats that were fed a cariogenic solid diet on day 18 after birth were orally infected with S. sobrinus on day 19 after birth and for 5 consecutive days thereafter. Five days after infection and, again, 3 weeks later, rEnolase plus alum adjuvant was delivered into the oral cavity of the rats. A sham-immunized group of rats was contemporarily treated with adjuvant alone. In the rEnolase-immunized rats, increased levels of salivary IgA and IgG antibodies specific for this recombinant protein were detected. A significant decrease in sulcal, proximal enamel, and dentin caries scores was observed in these animals, compared with sham-immunized control animals. No detectable histopathologic alterations were observed in all immunized animals. Furthermore, the antibodies produced against bacterial enolase did not react with human enolase. Overall, these results indicate that rEnolase could be a promising and safe candidate for testing in trials of vaccines against dental caries in humans.
Subject: Medicina básica
Basic medicine
Scientific areas: Ciências médicas e da saúde::Medicina básica
Medical and Health sciences::Basic medicine
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:ICBAS - Artigo em Revista Científica Internacional

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