1. A West Nile virus (WNV) recombinant canarypox virus vaccine elicits WNV-specific neutralizing antibodies and cell-mediated immune responses in the horse.
- Author
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El Garch H, Minke JM, Rehder J, Richard S, Edlund Toulemonde C, Dinic S, Andreoni C, Audonnet JC, Nordgren R, and Juillard V
- Subjects
- Animals, Antibodies, Viral blood, Antibodies, Viral immunology, Enzyme-Linked Immunosorbent Assay veterinary, Female, Horse Diseases immunology, Horse Diseases virology, Immunization, Secondary veterinary, Interferon-gamma blood, Male, Neutralization Tests veterinary, Statistics, Nonparametric, Vaccination methods, Vaccination veterinary, Viral Vaccines administration & dosage, West Nile Fever immunology, West Nile Fever prevention & control, West Nile Fever virology, West Nile Virus Vaccines administration & dosage, Antibodies, Viral biosynthesis, Horse Diseases prevention & control, Horses immunology, Viral Vaccines immunology, West Nile Fever veterinary, West Nile Virus Vaccines immunology, West Nile virus immunology
- Abstract
Successful vaccination against West Nile virus (WNV) requires induction of both neutralizing antibodies and cell-mediated immune responses. In this study, we have assessed the ability of a recombinant ALVAC-WNV vaccine (RECOMBITEK WNV) to elicit neutralizing antibodies and virus-specific cell-mediated immune responses in horses. In addition, we examined whether prior exposure to ALVAC-WNV vaccine would inhibit B and cell-mediated immune responses against the transgene product upon subsequent booster immunizations with the same vaccine. The results demonstrated that the recombinant ALVAC-WNV vaccine induced neutralizing antibodies and prM/E insert-specific IFN-gamma(+) producing cells against WNV in vaccinated horses. Prior exposure to ALVAC-WNV vaccine did not impair the ability of horses to respond to two subsequent booster injections with the same vaccine, although anti-vector-specific antibody and cell-mediated immune responses were induced in vaccinated horses. This report describes, for the first time, the induction of antigen-specific cell-mediated responses following vaccination with an ALVAC virus recombinant vaccine encoding WNV antigens. Moreover, we showed that both WNV-specific IFN-gamma producing cells and anti-WNV neutralizing antibody responses, are not inhibited by subsequent vaccinations with the same vector vaccine.
- Published
- 2008
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