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Vaccine. 2002 Feb 22;20(11-12):1579-85.

Intranasal inoculation of a recombinant influenza virus containing exogenous nucleotides in the NS segment induces mucosal immune response against the exogenous gene product in mice.

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Department of Immunology, National Institute of Infectious Diseases, Toyama 1-23-1, Shinjuku-ku, Tokyo 162-8640, Japan.


To establish a mucosal vaccine system, we evaluated the immunogenicity of a recombinant influenza virus, designated NS2Acat, in which the chloramphenicol acetyltransferase (CAT) reporter gene is fused in frame to the NS1 gene in the NS gene segment. The NS2Acat replicated slightly within the lungs in BALB/c mice after intranasal administration, accompanying expression of the CAT and the viral HA mRNA. NS2Acat induced delayed-type hypersensitivity (DTH) and sensitized the CAT-specific T lymphocytes in the regional lymph nodes, which proliferated and synthesized several cytokines in vitro upon antigenic challenge. These results suggest that NS2Acat is capable of eliciting a respiratory immune response against the fused gene product.

[Indexed for MEDLINE]

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