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  • Title: Multivalent DNA vaccine protects mice against pulmonary infection caused by Pseudomonas aeruginosa.
    Author: Saha S, Takeshita F, Sasaki S, Matsuda T, Tanaka T, Tozuka M, Takase K, Matsumoto T, Okuda K, Ishii N, Yamaguchi K, Klinman DM, Xin KQ, Okuda K.
    Journal: Vaccine; 2006 Sep 11; 24(37-39):6240-9. PubMed ID: 16806598.
    Abstract:
    For efficacious vaccine development against Pseudomonas aeruginosa (P. aeruginosa), the immunogenicity of multivalent DNA vaccine was evaluated. Three different plasmids each targeting a fusion of outer membrane proteins (OprF/OprI), a protein regulating type III secretion system (PcrV), or an appendage (PilA) were prepared and mice were immunized with single (monovalent) or a combination of these plasmids (multivalent) via intramuscular electroporation (imEPT) or gene gun. Immunization with multivalent DNA vaccine via imEPT induced the most potent protection against lethal pneumonia. Although the serum levels of IgG binding to whole bacteria cells were comparable between groups, the strongest immune protection was associated with the serum levels of Th1-dominated multivalent IgG, the bronchoalveolar levels of macrophage inflammatory protein 2 (MIP-2) and IFN-gamma, and the number of neutrophils and macrophages in the bronchoalveolar lavage following intranasal challenge. These results implied the possible clinical application of multivalent DNA vaccine against P. aeruginosa.
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