Anti-idiotypic vaccination against group B streptococci.
Int Rev Immunol
; 20(2): 263-73, 2001.
Article
em En
| MEDLINE
| ID: mdl-11878769
ABSTRACT
We describe the antigenic properties of an anti-idiotypic single chain fragment variable (scFv) recombinant antibody mimicking the type III capsular polysaccharide of group B streptococci (GBS), an important cause of neonatal sepsis. This scFv could compete with the nominal antigen for binding to specific mouse or rabbit antibodies. Moreover, the scFv elicited, in mice, the production of antibodies which reacted against the type IlI polysaccharide and passively protected neonatal pups from GBS disease. Maternal immunization with the scFv also protected neonatal mice against GBS infection. Next, the scFv was expressed on the surface of the commensal bacterium Streptococcus gordonii. Intravaginal inoculation of mice with these recombinant bacteria induced significant elevations in serum titers of anti-GBS type III antibodies. Therefore, the expression scFv in commensal bacteria may be a convenient and effective way of delivering anti-idiotypic vaccines.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Streptococcus agalactiae
/
Anticorpos Anti-Idiotípicos
/
Vacinas Estreptocócicas
Limite:
Animals
/
Pregnancy
Idioma:
En
Revista:
Int Rev Immunol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Itália