Abstract
Alphavirus-based vectors present an efficient approach for antigen preparation applied for vaccine development. Semliki Forest virus, Sindbis virus, and Venezuelan equine encephalitis virus have been engineered for high-level expression of antigens targeting infectious diseases and tumors. Alphaviruses possess a large application range as vectors can be delivered as naked RNA replicons, recombinant viral particles, and layered DNA plasmids. Immunization studies in animal models have provided protection against challenges with lethal doses of pathogenic infectious agents and tumor cells. So far, a limited number of clinical trials have been conducted for alphavirus vectors in humans.
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