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Vaccine Detail

B. pseudomallei DNA vaccine encoding Flagellin Protein
Vaccine Information
  • Vaccine Name: B. pseudomallei DNA vaccine encoding Flagellin Protein
  • Target Pathogen: Burkholderia pseudomallei
  • Target Disease: Melioidosis
  • Vaccine Ontology ID: VO_0011538
  • Type: DNA vaccine
  • Status: Research
  • fliC gene engineering:
    • Type: DNA vaccine construction
    • Description:
    • Detailed Gene Information: Click Here.
  • Adjuvant: complete Freunds adjuvant
  • DNA vaccine plasmid: pcDNA3 DNA vaccine plasmid
  • Immunization Route: Intramuscular injection (i.m.)
Host Response

Mouse Response

  • Host Strain: Balb/c
  • Vaccination Protocol: Six-week-old female Balb/c mice from groups 1–3 were injected intramuscularly (i.m.) with pcDNA3/fliC in PBS (50, 100 or 150 μg); whereas those from group 4 (the negative control) were injected (i.m) with vector DNA(150 μg; pcDNA3) in PBS, whilst those from group 5 (the positive control) were injected subcutaneously with recombinant flagellin antigens (50 μg) emulsified in complete Freund's adjuvant. Each animal from group 5 was subsequently boosted with the same dose of flagellin in incomplete Freund's adjuvant 14 days subsequent to the initial flagellin injection. The animals in groups 1–4 were boosted twice with an identical dose of plasmid DNA, once at 7 days and then again at 14 days after the initial injection (Chen et al., 2006).
  • Challenge Protocol: The immunized mice were infected via the tail vein with 105 CFU of mixed B. pseudomallei suspended in sterile PBS (50 μl). As control groups, the mice received either sterile PBS or vector DNA (Chen et al., 2006).
  • Efficacy: Subsequent intravenous challenge of the vaccinated Balb/c mice with 10(5)CFU of B. pseudomallei resulted in the number of bacterial cells detected in liver and/or spleen being significantly reduced in the flagellin plasmid DNA vaccinated mice. At 7 days subsequent to infection of B. pseudomallei, 5/6 (83%) of flagellin plasmid DNA vaccinated mice had survived (Chen et al., 2006).
  • Host Ifng (Interferon gamma) response
    • Description: Mice spleen cells were collected after an eight-week immunization. The up-regulation of IFN-γ production among the mice immunized with pcDNA3/fliC was significantly greater than among the mice either immunized with recombinant flagellin or vaccinated with vector DNA only (Chen et al., 2006).
    • Detailed Gene Information: Click Here.
References
Chen et al., 2006: Chen YS, Hsiao YS, Lin HH, Yen CM, Chen SC, Chen YL. Immunogenicity and anti-Burkholderia pseudomallei activity in Balb/c mice immunized with plasmid DNA encoding flagellin. Vaccine. 2006; 24(6); 750-758. [PubMed: 16169637].