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Immunization with Naked DNA Coexpressing Antigen and Cytokine via IRES
J Heinrich1, B Strack, M Nawrath
1Institute of Medical Virology, University of Zurich, Zurich, Switzerland.
Abstract:
Inoculation of plasmid DNA vectors encoding immunogenic proteins induce humoral as well as cell-mediated immune responses. Protection against challenge with pathogens has provided protective immunity in several instances in animal models. (1,2). DNA vaccines allow the simultaneous expression of antigens and immune-stimulatory cytokines via an internal ribosomal entry site (IRES). Here we describe the construction of a DNA vaccine against malignant melanomas using: (i) the tumor-associated antigen gp100 (or pmel17), known to be over-expressed in many malignant melanomas (3,4), and (ii) the granulocyte macrophage stimulating factor (GM-CSF) which has been shown to have a stimulatory effect on humoral and cellular immune responses (5).
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