Journal
JOURNAL OF INFECTIOUS DISEASES
Volume 183, Issue 9, Pages 1395-1398Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/319857
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In genetic vaccination, recipients are immunized with antigen-encoding nucleic acid, usually DNA. This study addressed the possibility of using the recombinant alpha virus RNA molecule, which replicates in the cytoplasm of transfected cells, as a novel approach for genetic vaccination. Mice were immunized with recombinant Semliki Forest virus RNA-encoding envelope proteins from one of 3 viruses: influenza A virus, a tickborne flavivirus (louping ill virus), or respiratory syncytial virus (RSV). Serologic analyses showed that antigen-specific antibody responses were elicited. IgG isotyping indicated that predominantly Th1 type immune responses were induced after immunization with RSV F protein-encoding RNA, which is relevant for protection against RSV infection. Challenge infection showed that RNA immunization had elicited significant levels of protection against the 3 model virus diseases.
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