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Biotechnology (N Y) ; 12(8): 813-8, 1994 Aug.
Article in English | MEDLINE | ID: mdl-7765021

ABSTRACT

We have produced a genetically-engineered chimeric protein composed of the external domains of the respiratory syncytial virus (RSV) fusion (F) protein and the parainfluenza virus type 3 (PIV-3) hemagglutinin-neuraminidase (HN) protein in insect cells using the baculovirus expression system. The yield of the soluble chimeric FRSV-HNPIV-3 protein could be increased approximately 2-fold by using Trichoplasia ni (High Five) insect cells in place of Spodoptera frugiperda (Sf9) for expression. The chimeric protein, purified from the supernatant of baculovirus-infected High Five cells by immunoaffinity chromatography was correctly processed at the F2-F1 proteolytic cleavage site. Immunochemical analysis of the chimera with a panel of anti-F and anti-HN monoclonal antibodies suggested that the antigenicity of the major F and HN neutralization epitopes of the chimeric protein was preserved. Immunization of cotton rats with two 1 or 10 micrograms doses of the chimeric protein adsorbed to aluminum phosphate elicited strong PIV-3 specific HAI responses as well as PIV-3 and RSV specific neutralizing antibodies, and at either dose completely protected against challenge with live RSV and PIV-3.


Subject(s)
HN Protein , Parainfluenza Virus 3, Human/immunology , Recombinant Fusion Proteins/immunology , Respiratory Syncytial Viruses/immunology , Vaccines, Synthetic , Viral Vaccines , Amino Acid Sequence , Animals , Antibodies, Monoclonal/immunology , Baculoviridae/genetics , Base Sequence , Gene Expression , Gene Transfer Techniques , Genetic Engineering , Hemagglutinins/chemistry , Hemagglutinins/genetics , Hemagglutinins/immunology , Molecular Sequence Data , Moths/metabolism , Neuraminidase/chemistry , Neuraminidase/genetics , Neuraminidase/immunology , Recombinant Fusion Proteins/chemistry , Recombinant Fusion Proteins/genetics , Viral Envelope Proteins , Viral Fusion Proteins/chemistry , Viral Fusion Proteins/genetics , Viral Fusion Proteins/immunology , Viral Proteins/chemistry , Viral Proteins/genetics , Viral Proteins/immunology
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