ABSTRACT
Libraries of hybrid plasmids carrying DNA fragments of complete genomes of 8 variola virus strain from the Russian Collection belonging to 2 epidemical types and isolated in various geographic regions of the world were obtained. Genomic sequences of variola virus can be thus preserved for a long time in a biologically safe form and provide the research work on studying the genetic organization of this unique virus and on developing modern methods for rapid detection of variola virus and other orthopoxviruses.
Subject(s)
Genome, Viral , Variola virus/genetics , DNA, Viral/analysis , DNA, Viral/genetics , Global Health , Plasmids/genetics , Polymerase Chain Reaction , Restriction MappingABSTRACT
Eight specific antibodies to live variola virus (VV), Ind-3a strain, and 7 antibodies to VV, Butler strain, were selected from the synthetic combinatorial phage display library on single-chain (scFv) human antibodies. Indirect solid-phase enzyme immunoassay showed the ability of these antibodies to bind the VV strains Ind-3a, Butler, Brazil-131, Kuw-5, and Congo-2. Moreover, earlier selected human scFv antibodies were also tested in the reaction of binding to the above VV strains. The experiments could reveal the antibodies that bound alastrim strains more effectively that did other VV strains. The nucleotide sequences encoding for the selected scFv antibodies were determined.
Subject(s)
Antibodies, Viral/immunology , Variola virus/immunology , Amino Acid Sequence , Antibodies, Viral/biosynthesis , Antibodies, Viral/genetics , Combinatorial Chemistry Techniques , Cross Reactions , Humans , Immunoglobulin Variable Region/biosynthesis , Immunoglobulin Variable Region/genetics , Immunoglobulin Variable Region/immunology , Peptide Library , Recombinant Proteins/genetics , Recombinant Proteins/immunologySubject(s)
Severe acute respiratory syndrome-related coronavirus/physiology , Severe acute respiratory syndrome-related coronavirus/ultrastructure , Animals , Cell Line , Horses/virology , Microscopy, Electron , Neutralization Tests , Severe acute respiratory syndrome-related coronavirus/genetics , Severe acute respiratory syndrome-related coronavirus/immunology , Virion/ultrastructureABSTRACT
A method for describing the Orthopoxviruses that are pathogenic both to man and animals is described in the article. The method is based on hybridization of a fluorescently labelled amplified DNA sample with oligonucleotides, which were immobilized in a microchip. Species-specific regions within the crmB gene encoding a viral analogue of the tumor necrosis factor receptor, i.e. an important gene determining the pathogenicity of the mentioned Orthopoxviruses type, were used as a target for identification. The identification procedure takes around 6 hours and does not demand any costly equipment (a portable fluorescent microscope can be used).
