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In these studies, we address the ability of DNA encoding Th1 cytokines to bias the isotype of antibody raised by neonatal or adult immunization with an influenza hemagglutinin expressing DNA (HA-DNA). Neonatal mice coimmunized with HA-DNA and either IL-12 or IFN-γ-expressing DNA developed IgG2a-biased immune responses, regardless of inoculation method. In contrast, the Th1 genetic adjuvants had no...
Neonatal mice have immature immune systems with defects in several components of inflammatory, innate, and specific immune responses and develop a preferential T helper type 2 response following immunization with many vaccine antigens. These studies were undertaken to determine whether 1-day-old neonatal mice immunized with plasmid DNA expressing influenza A/PR/8/34 hemagglutinin (H1) by either intramuscular...
Particle-mediated (gene gun) DNA transfer to the epidermis was evaluated for its ability to elicit humoral and cytotoxic T lymphocyte responses using decreasing quantities of plasmid DNA-based antigen expression vectors. Using plasmids encoding human growth hormone, human alpha-1-antitrypsin, and influenza virus nucleoprotein, strong immune responses were observed in mice following immunization with...
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