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Characterization and immune response of a protein produced by a cDNA clone of foot and mouth disease virus, type Asia 1 63/72.
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1992
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Virus StructureViral ReplicationMolecular VirologyPathogenesisImmunologyViral PathogenesisPathologyVirologyType Asia 1Expression VectorVirus GeneSwine VirusMouth Disease VirusMedicineViral ImmunityViral GeneticsKb DoubleAnimal Virus
A 0.9 kb double stranded cDNA of foot and mouth disease virus (FMDV) Type Asia 1, 63/72 was cloned in an expression vector, pUR222. A protein of 38 kd was produced by the clone which reacted with the antibodies raised against the virus. A 20 kd protein which may be derived from the 38 kd protein contained the antigenic epitopes of the protein VP1 of the virus. Injection of 10-20 micrograms of the partially purified 38 and 20 kd proteins or a lysate of cells containing 240 micrograms of the proteins elicited high titers of FMDV specific antibodies in guinea pigs and cattle respectively. Also, at these concentrations, the proteins protected 5 of 8 guinea pigs and 3 of 8 cattle when challenged with a virulent virus.