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Infect. Immun., Apr 1997, 1286-1292, Vol 65, No. 4
J Hess, G Dietrich, I Gentschev, D Miko, W Goebel and SH Kaufmann
A recombinant (r)-Salmonella typhimurium aroA vaccine strain was
constructed which secretes the naturally somatic protein of Listeria
monocytogenes, superoxide dismutase (SOD), by the HlyB/HlyD/TolC export
machinery. Vaccine efficacy of the SOD-bearing carrier strain was compared
with that of the p60-secreting construct, S. typhimurium p60s (J. Hess, I.
Gentschev, D. Miko, M. Welzel, C. Ladel, W. Goebel, and S. H. E. Kaufmann,
Proc. Natl. Acad. Sci. USA 93:1458-1463, 1996). Vaccination of mice with
both constructs induced protection against a lethal challenge with the
intracellular pathogen, L. monocytogenes. While the somatic listerial
antigen, SOD, is immunologically uncharacterized, the naturally secreted
protein of L. monocytogenes, p60, is known to be highly immunogenic. Our
data emphasize the high vaccine potential of r-Salmonella constructs
secreting antigens of somatic or secreted origin. Moreover, they suggest
that the HlyB/HlyD/TolC-based antigen delivery system with attenuated
Salmonella spp. as the carrier is capable of potentiating the immune
response against foreign proteins independent from their immunogenicity in
and display by the natural host.
Copyright © 1997, American Society for Microbiology
Protection against murine listeriosis by an attenuated recombinant Salmonella typhimurium vaccine strain that secretes the naturally somatic antigen superoxide dismutase
Department of Immunology, University of Ulm, Germany. juergen.hess@medizin.uni-ulm.de
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