DNA vaccines

Current Molecular Medicine
A Reyes-Sandoval, H C Ertl

Abstract

Within the last decade bacterial plasmids encoding foreign antigens have revolutionized vaccine design. Although no DNA vaccine has yet been approved for routine human or veterinary use, the potential of this vaccine modality has been demonstrated in experimental animal models. Plasmid DNA vaccination has shown efficacy against viral, bacterial and parasitic infections, modulated the effects of autoimmune and allergic diseases and induced control over cancer progression. With a better understanding of the basic immune mechanisms that govern induction of protective or curative immune responses, plasmid DNA vaccines and their mode of delivery are continuously being optimized. Because of the simplicity and versatility of these vaccines, various routes and modes of delivery are possible to engage the desired immune responses. These may be T or B effector cell responses able to eliminate infectious agents or transformed cells. DNA vaccines may also induce an immunoregulatory/modulatory or immunosuppressive (tolerizing) response that interferes with the differentiation, expansion or effector functions of B and T cells. In this sense a DNA vaccine may be thought of as a 'negative' vaccine. Pre-clinical and initial small-scale clinical...Continue Reading

Citations

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