alexa First EBV vaccine trial in humans using recombinant vaccinia virus expressing the major membrane antigen.
Immunology

Immunology

Immunological Disorders & Immunotherapy

Author(s): Gu SY, Huang TM, Ruan L, Miao YH, Lu H,

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Abstract In the absence of a truly representative animal model, the question of whether EBV-related diseases can be prevented by a vaccine has been studied for the first time in humans. A live recombinant virus based on the licensed vaccinia strain Tien Tan, expressing under the 11K vaccinia promoter the major EBV membrane antigen BNLF-1 MA (gp 220-340), was constructed and tested in three different human populations: EBV-positive and vaccinia-virus-exposed adults; EBV-positive, non-vaccinia-virus-exposed juveniles; and EBV and vaccinia virus-naive infants. No significant titre variations for EBV were observed in the adults, but EBV-neutralising titres increased in the vaccinated juveniles, while antibodies to VCA of EBV remained unchanged. All nine vaccinated infants developed antibodies to MA (membrane antigen) with neutralising properties in vitro; three of these infants were infected by EBV via natural routes over a period of 16 months after vaccination and all ten unvaccinated control infants became infected. It has been shown for the first time that protection against and/or delay of EBV infection by the natural route is possible in humans and that live vaccinia vectors can be used and are efficacious.
This article was published in Dev Biol Stand and referenced in Immunological Disorders & Immunotherapy

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