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Viral Immunol ; 11(3): 109-17, 1998.
Artigo em Inglês | MedCarib | ID: med-1333

RESUMO

An improved vaccine is needed against Venezuelan equine encephalitis (VEE) virus because the existing live attenuated vaccine, TC-83, causes a high incidence of adverse effects, and the Formalin-inactivated vaccine, C-84, does not protect against airborne infection. A recombinant vaccine had previously been constructed in which the VEE structural proteins were expressed by vaccinia virus. Although protection against subcutaneous challenge with VEE was achieved, the vaccine had limited efficacy against aerosolized virus. We made a similar construct (WR100) and compared its performance as a vaccine: a synthetic promoter was inserted upstream of the VEE coding sequence to increase the amount of VEE proteins produced, and a single nucleotide in the E2 glycoprotein gene was altered to enhance immunogenicity. The WR103 virus expressed greater amounts of VEE proteins on the surface of infected cells than did WR100, and this difference was production. Sera from mice immunized with WR103 contained elevated levels of antibody to VEE, and enhanced protection against subcutaneous challenge with the pathogenic Trinidad donkey strain was achieved. This altered construct could form the basis for a better vaccine against VEE.(Au)


Assuntos
21003 , Feminino , Anticorpos Antivirais/sangue , Vírus da Encefalite Equina Venezuelana/imunologia , Encefalomielite Equina Venezuelana/prevenção & controle , Vacinas Sintéticas/imunologia , Vacinas Virais/imunologia , Substituição de Aminoácidos , Ensaio de Imunoadsorção Enzimática , Engenharia Genética , Camundongos , Camundongos Endogâmicos BALB C , Proteínas Recombinantes/imunologia , Vacinação , Vírus Vaccinia/genética , Vírus Vaccinia/metabolismo , Proteínas Virais/análise , Proteínas Virais/imunologia
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