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J. Virol., 11 1995, 6678-6686, Vol 69, No. 11
Copyright © 1995, American Society for Microbiology

Mucosal model of immunization against human immunodeficiency virus type 1 with a chimeric influenza virus

T Muster, B Ferko, A Klima, M Purtscher, A Trkola, P Schulz, A Grassauer, OG Engelhardt, A Garcia-Sastre and P Palese
Institut fur Angewandte Mikrobiologie, Universitat fur Bodenkultur, Vienna, Austria.

Previously, we constructed a chimeric influenza virus that expresses the highly conserved amino acid sequence ELDKWA of gp41 of human immunodeficiency virus type 1 (HIV-1). Antisera elicited in mice by infection with this chimeric virus showed neutralizing activity against distantly related HIV-1 isolates (T. Muster, R. Guinea, A. Trkola, M. Purtscher, A. Klima, F. Steindl, P. Palese, and H. Katinger, J. Virol. 68:4031-4034, 1994). In the present study, we demonstrated that intranasal immunizations with this chimeric virus are also able to induce a humoral immune response at the mucosal level. The immunized mice had ELDKWA-specific immunoglobulins A in respiratory, intestinal, and vaginal secretions. Sustained levels of these secretory immunoglobulins A were detectable for more than 1 year after immunization. The results show that influenza virus can be used to efficiently induce secretory antibodies against antigens from foreign pathogens. Since long-lasting mucosal immunity in the genital and intestinal tracts might be essential for protective immunity against HIV-1, influenza virus appears to be a promising vector for HIV-1- derived immunogens.


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Copyright © 1995 by the American Society for Microbiology. All rights reserved.