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A DNA vaccine candidate encoding the structural prM/E proteins elicits a strong immune response and protects mice against dengue-4 virus infection
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A DNA vaccine candidate encoding the structural prM/E proteins elicits a strong immune response and protects mice against dengue-4 virus infection
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Journal Article
A DNA vaccine candidate encoding the structural prM/E proteins elicits a strong immune response and protects mice against dengue-4 virus infection
2011
Overview
A DNA vaccine expressing dengue-4 virus premembrane (prM) and envelope (E) genes was produced by inserting these genes into a mammalian expression plasmid (pCI).
Following a thorough screening, including confirmation of protein expression in vitro, a recombinant clone expressing these genes was selected and used to immunize BALB/c mice. After 3 immunizations all the animals produced detectable levels of neutralizing antibodies against dengue-4 virus. The cytokines levels and T cell proliferation, detected ex vivo from the spleen of the immunized mice, showed that our construction induced substantial immune stimulation after three doses. Even though the antibody levels, induced by our DNA vaccine, were lower than those obtained in mice immunized with dengue-4 virus the levels of protection were high with this vaccine.
This observation is further supported by the fact that 80% of the vaccine immunized group was protected against lethal challenge. In conclusion, we developed a DNA vaccine employing the genes of the prM and E proteins from dengue-4 virus that protects mice against this virus.
Publisher
Elsevier Ltd,Elsevier,Elsevier Limited
Subject
/ Animals
/ Antibodies, Neutralizing - blood
/ Biological and medical sciences
/ Cloning
/ Dengue - prevention & control
/ Dengue-4
/ DNA
/ Female
/ Fundamental and applied biological sciences. Psychology
/ genes
/ Immunization, Secondary - methods
/ Mice
/ Plasmid
/ Plasmids
/ proteins
/ spleen
/ Vaccine
/ Vaccines
/ Vaccines, antisera, therapeutical immunoglobulins and monoclonal antibodies (general aspects)
/ Vaccines, DNA - administration & dosage
/ Viral Structural Proteins - genetics
/ Viral Structural Proteins - immunology
/ Virology
/ Viruses
