title: Characterization of a porcine kidney cell line resistant to influenza virus infection.
abstract: A mutant cell line of porcine kidney cells that resists the cytopathic effect of influenza virus has been obtained and characterized. These cells, designated ESK-R, were originally obtained by prolonged cultivation of cells surviving influenza B/Kanagawa/73 virus infection. No infectious virus was recovered from ESK-R cells, and no evidence for the presence of virus antigens in the cells was demonstrated by immunofluorescent staining. ESK-R cells also showed a distinct resistance to various other strains of both types A and B influenza viruses. The growth of mumps, Sendai, or Newcastle disease virus was considerably restricted, but the cell line normally supported the replication of vesicular stomatitis virus. ESK-R cells were found to lack specific receptors for influenza virus as determined by fluorescence-activated cell sorter analyses. The membrane barrier of ESK-R cells was successfully overcome by nonspecific endocytosis of calcium-coprecipitated virus particles followed by production of an appreciable amount of progeny virus.
mesh_terms: D000818:Animals; D002460:Cell Line; D003588:Cytopathogenic Effect, Viral; D009975:Orthomyxoviridae / Q000254:growth & development*; D011991:Receptors, Virus / Q000032:analysis; D013552:Swine; D014779:Virus Replication
chemical_list: D011991:Receptors, Virus