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Immunization Of Mice With Lipopeptide Antigens Encapsulated In Novel Liposomes Prepared From The Polar Lipids Of Various Archaeobacteria Elicits Rapid And Prolonged Specific Protective Immunity Against Infection With The Facultative Intracellular Pathogen, Listeria Monocytogenes.
J. Conlan, L. Krishnan, G. Willick, G. B. Patel, G. Sprott
Published 2001 · Biology, Medicine
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Protective immunity to intracellular bacterial pathogens usually requires the participation of specific CD8+ T cells. Natural exposure of the host to sublethal infection, or vaccination with attenuated live vaccines are the most effective means of eliciting prolonged protective cell-mediated immunity against this class of pathogens. The ability to replace these immunization strategies with defined sub-unit vaccines would represent a major advance for clinical vaccinology. The present study examines the ability of novel liposomes, termed archaeosomes, made from the polar lipids of various Archaeobacteria to act as self-adjuvanting vaccine delivery vehicles for such defined acellular antigens. Using infection of mice with Listeria monocytogenes as a model system, this study clearly demonstrates the ability of defined, archaeosome-entrapped antigens to elicit rapid and prolonged specific immunity against a prototypical intracellular pathogen. In this regard, all of the tested archaeosomes were superior to conventional liposomes.
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