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  • 1
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary.  For the potential use as recombinant vaccine, canine parvovirus (CPV) major capsid protein VP2 was expressed using Bombyx mori nucleopolyhedrovirus (BmNPV) vector. CPV VP2 gene was introduced into polyhedrin-based BmNPV transfer vector pBmKSK3, and recombinant virus BmK1-Parvo was prepared. When anti-CPV.VP2 monoclonal antibody was employed in immunofluorescence staining, an intense signal was observed within BmK1-Parvo-infected Bm5 cells but not within uninfected cells or cells infected with a wild-type BmNPV-K1. In hemagglutination assay, the expression level of VP2 were 3.2 × 103 HA units/ml from infected Bm5 cells, 2.1× 105 HA units/larvae from infected larval fat body, and 1.6× 106 HA units/ml from infected larval hemolymph. These results suggested that BmNPV vector system using B. mori larva as host could be applied to efficient mass-production of recombinant vaccines.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary.  Bombyx mori nucleopolyhedroviruses (BmNPVs), isolated from a sericultural Korean farm, were purified and characterized by their DNA restriction pattern, virus replication, polyhedra production and gene structures. The EcoR I and Sal I fragments showed similar overall patterns with minor difference but distinguishable patterns in each isolate. There was no significant difference in the virus replication pattern, yield of total polyhedra production and polyhedra morphology, but the yield of released polyhedra by BmNPV-K1 in Bm5 cells was 2 to 5 times higher than that of other isolates. In comparative studies of p10 gene, BmNPV-K1 and K3 had same structure and they encoded a protein consisting of 94 amino acids. Although BmNPV-K2 encoded the same length of amino acids with BmNPV-K1 and K3, it had different structure, and BmNPV-K4 had the p10 gene encoding 70 amino acids.
    Type of Medium: Electronic Resource
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