Primate cells naturally susceptible to poliovims infection possess specific surface receptors that permit poliovirus to be adsorbed quantitatively, received within the cell, eclipsed with loss of infectivity, replicated, and released with accompanying cytopathic effect. Conversely, non-primate cells are naturally insusceptible to poliovirus infection, do not possess active receptors, adsorb only a small fraction of supplied poliovirus, fail to eclipse or replicate measurable amounts of the cell-associated virus, and undergo no cytopathic change (1, 2). It was of interest to learn whether the specific capacity of primate ceils to receive, replicate, and release poliovirus was conditioned wholly by presence of specific receptors. Preliminary findings indicated lack of receptors required for cell infection by poliovirus could be surmounted by use of viral RNA (3).The present communication describes production of infectious poliovirus and other enteroviruses by non-primate cells exposed to viral ribonucleic acid, comparative efficiency of non-primate and primate cells for such virus production, and properties of the produced virus.
Materials and MethodsCell Culture Methods.--Cell sources, cultural methods, solutions, and media have been described previously (I, 4).